Version 0.10

bug fixes around cancel/join/exit
fix cancellation
2015-09-15 10:39:36 +09:00 · 2015-09-15 10:26:40 +09:00 · 2015-09-11 17:04:28 +09:00 · 2015-09-10 20:22:32 +09:00 · 2015-09-09 17:06:51 +09:00 · 2015-09-09 17:04:59 +09:00
67 changed files with 7267 additions and 1424 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,3 @@
-example-cdc/.dep
-example-cdc/board.h
-example-cdc/build
-example-led/.dep
-example-led/board.h
-example-led/build
+*/build
+*/.dep
 doc/chopstx.info
--- a/37
+++ b/37
@@ -0,0 +1,37 @@
+Aidan Thornton:
+    Added Maple Mini support.
+	board/board-maple-mini.h
+
+Kaz Kojima:
+    Added STM32 Primer2 support.
+	board/board-stm32-primer2.h
+	example-primer2
+
+Kenji Rikitake:
+    Added ST Dongle support.
+	board/board-st-dongle.h
+    Added ST Nucleo F103 support.
+	board/board-st-nucleo-f103.h
+
+Kiwamu Okabe:
+    Wrote an OpenOCD scirpt:
+        example-fsm-55/stlink-v2.cfg
+
+Mateusz Zalega:
+    Added Nitrokey-Start support.
+	board/board-nitrokey-start.h
+
+NIIBE Yutaka:
+    Write the library:
+	chopstx.c, eventflag.c, entry.c, clk_gpio_init.c
+        chopstx.h, eventflag.h
+    Draw the logo:
+	chopstx.svg, chopstx.png
+    Write examples:
+        example-led, example-cdc, example-fsm-55
+    Write board:
+        board-fst-01.h, board-fst-01-00.h,
+	board-olimex-stm32-h103.h, board-stm8s-discovery.h
+	board-cq-starm.h, board-stbee-mini.h, board-stbee.h,
+
+	board-stm32f0-discovery.h, board-fsm-55.h
--- a/233
+++ b/233
@@ -1,3 +1,236 @@
+2015-09-15  Niibe Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 0.10.
+	* doc/chopstx.texi (VERSION): 0.10.
+
+	* example-cdc/usb_stm32f103.c: Update from Gnuk.
+
+2015-09-14  Niibe Yutaka  <gniibe@fsij.org>
+
+	* chopstx.c (q_exit): Remove.
+	(chx_init, chx_exit): Remove access to Q_EXIT.
+	(chx_release_irq_thread): Fix removing form the list.
+
+2015-09-11  Niibe Yutaka  <gniibe@fsij.org>
+
+	* chopstx.c (chx_init, chopstx_create): Fix the initial value
+	of flag_cancelable.
+
+2015-09-10  Niibe Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 0.09.
+	* doc/chopstx.texi (VERSION): 0.09.
+
+	* chopstx.c (chx_release_irq_thread): Rename.
+
+2015-09-09  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-cdc/usb-cdc.c (usb_cb_ctrl_write_finish): Distinguish
+	DTR signal.
+	(usb_cb_device_reset): Fix USB reset handling.
+
+	* chopstx.c (chopstx_usec_wait_var, chopstx_cond_wait)
+	(chopstx_intr_wait): Call chopstx_testcancel.
+	(chopstx_setcancelstate): New.
+
+	* chopstx.c (chx_systick_reset, chx_systick_reload)
+	(chx_systick_get): Factor out systick functions.
+	(chx_prio_init): Factor out.
+
+2015-09-08  Niibe Yutaka  <gniibe@fsij.org>
+
+	* chopstx.c (chx_request_preemption): Add PRIO argument and check
+	the condition inside.
+	(chx_timer_expired, chx_handle_intr): Call unconditionally.
+	(intr_lock): New variable.
+	(chx_handle_intr, chopstx_claim_irq, chopstx_release_irq)
+	(chopstx_release_irq_thread): Add spin lock with intr_lock.
+
+	* chopstx.h (chx_intr): Remove member LOCK.
+
+2015-09-07  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-primer2: New from Kazumoto Kojima.
+
+	* board/board-nitrokey-start.h (VAL_GPIO_USB_ODR)
+	(VAL_GPIO_USB_CRL): Fix the values for NeuG settings.
+
+2015-09-04  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-cdc/sys.h (BOARD_ID_NITROKEY_START): New.
+	* board/board-nitrokey-start.h (BOARD_ID): Fix the value.
+	* clk_gpio_init.c (AFIO_MAPR_SWJ_CFG_JTAGDISABLE): New.
+
+2015-08-07  Mateusz Zalega <mateusz@nitrokey.com>
+
+	* board/board-nitrokey-start.h: New.
+
+2015-08-06  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-fsm-55/README: Updated.
+
+2015-07-31  Niibe Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 0.08.
+	* doc/chopstx.texi (VERSION): 0.08.
+
+	* example-fsm-55/Makefile (DEFS): Remove HAVE_SYS_H.
+	Add MAKE_ENTRY_PUBLIC.
+	* example-fsm-55/hacker-emblem.ld: Put vectors on ROM.
+	* example-fsm-55/sys.c: No system services.
+	* entry.c (entry): Can be public.
+	* clk_gpio_init.c [MCU_STM32F0] (clock_init): Don't change CFGR1.
+
+2015-07-30  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-st-nucleo-f103.h: New.  Contributed by Kenji
+	Rikitake.
+
+2015-07-29  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-st-dongle.h: New.  Contributed by Kenji Rikitake.
+
+	* board/board-*.h (FLASH_PAGE_SIZE): Remove.
+
+2015-07-28  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-cdc/usb_stm32f103.c: Update from Gnuk.
+	* example-cdc/usb_lld.h: Ditto.
+	* example-cdc/usb-cdc.c: Follow the change.
+
+2015-07-15  Niibe Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 0.07.
+	* doc/chopstx.texi (VERSION): 0.07.
+
+2015-07-14  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-*.h (BOARD_ID): New.
+	* example-cdc/sys.c (sys_board_id): New.
+	* example-cdc/sample.ld (.sys.board_id): New.
+	(__flash_start__, __flash_end__): Remove.
+	* entry.c [HAVE_SYS_H] (vector_table): By undefining STM32F10X_MD,
+	prepare for high density device even compiled for MD device.
+
+2015-07-13  Kaz Kojima  <kkojima@rr.iij4u.or.jp>
+
+	* board/board-stm32-primer2.h: Update.
+	* entry.c (vector_table): Less or more.
+
+2015-07-13  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-*.h (BOARD_NAME): New.
+	(STM32F10X_MD): Define for medium-density devices.
+	* example-led/sys.c, sample.ld: Update.
+	* example-fsm-55/sys.c, hacker-emblem.ld: Update.
+	* example-cdc/sys.c (sys_board_name): New.
+	* example-cdc/sample.ld: Update.
+
+2015-07-08  Niibe Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 0.06.
+	* doc/chopstx.texi (VERSION): 0.06.
+
+2015-07-07  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-fsm-55/sys.c: Include clk_gpio_init.c.
+	* board/board-stm32f0-discovery.h, board/board-fsm-55.h: Update.
+	* clk_gpio_init.c (gpio_init): Use VAL_GPIO_LED_*.
+
+2015-06-29  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-cq-starm.h: New for CQ STARM.
+
+	* clk_gpio_init.c (gpio_init): LED is mandatory, but USB enabler
+	is optional.
+	* board/*.h: Update.
+
+2015-06-22  Niibe Yutaka  <gniibe@fsij.org>
+
+	* clk_gpio_init.c: New, adding ports E/F/G.
+	* entry.c: Include clk_gpio.init.c if not HAVE_SYS_H.
+	* example-led/sys.c: Include clk_gpio_init.c.
+	* example-cdc/sys.c: Ditto.
+
+	* board/board-stm32-primer2.h: New from Kaz Kojima.
+
+2015-04-20  Niibe Yutaka  <gniibe@fsij.org>
+
+	Merge cortex-m0-support branch.
+
+	* VERSION: 0.05.
+
+	* example-led/sys.c (gpio_init): Support MCU_STM32F0.
+	(reset): Support __ARM_ARCH_6M__.
+	* example-led/sample.ld: Change for Cortex-M0.
+
+	* example-fsm-55/*: New example for FSM-55.
+
+	* entry.c (STM32_PPRE1, STM32_PLLSRC, STM32_FLASHBITS)
+	(STM32_PLLCLKIN): Support MCU_STM32F0.
+	(struct RCC, RCC_*): Support MCU_STM32F0.
+	(struct SYSCFG) [MCU_STM32F0]: New.
+	(struct GPIO, GPIO*): Support MCU_STM32F0.
+	(clock_init, gpio_init): Support MCU_STM32F0.
+	(hard_fault, vectors_in_ram, entry): Support Cortex-M0.
+
+	* chopstx.c (chx_cpu_sched_lock, chx_cpu_sched_unlock)
+	(sched, preempt, svc): Support Cortex-M0.
+
+	* board/board-fsm-55.h: New.
+	* board/board-stm32f0-discovery.h: New.
+
+2015-04-17  Niibe Yutaka  <gniibe@fsij.org>
+
+	* chopstx.c (CHX_PRIO_MAIN_INIT): New, removing CHX_PRIO_MAIN.
+	(chopstx_main_init): New.
+	(chx_init): Use CHX_PRIO_MAIN_INIT.
+
+2015-04-08  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-maple-mini.h: New from Aidan Thornton.
+
+2015-03-17  Niibe Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 0.04a.
+
+2014-12-10  Niibe Yutaka  <gniibe@fsij.org>
+
+	* Version 0.04.
+	* doc/chopstx.texi (VERSION): 0.04.
+
+	* board/*.h: Updated.
+
+	* example-cdc/sys.c: Copied from example-led.
+
+	* example-led/sys.c (clock_init, GPIO_USB): Follow the change of
+	entry.c.
+	(gpio_init): Use RCC_ENR_IOP_EN and RCC_RSTR_IOP_RST.
+	(reset): Use ldr instead of mov.w and movt.
+
+	* entry.c (GPIO_USB) [GPIO_USB_BASE]: Conditionally defined.
+
+	* chopstx.c (preempt): Add ! for stm.
+	(chx_exit): Make sure RETVAL is saved onto r8.
+	(chopstx_usec_wait_var): Make sure USEC_P is saved onto r8.
+
+2013-11-27  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-stbee-mini.h: New.
+
+	* entry.c (AFIO_MAPR_SWJ_CFG_DISABLE): New.
+
+2013-11-26  Niibe Yutaka  <gniibe@fsij.org>
+
+	* board/board-stbee.h: New.
+
+	* rules.mk (OUTFILES) [ENABLE_OUTPUT_HEX]: Add hex generation.
+
+2013-11-21  Niibe Yutaka  <gniibe@fsij.org>
+
+	* example-cdc/usb_stm32f103.c, example-cdc/usb_lld.h: Update from
+	Gnuk.
+
 2013-11-08  Niibe Yutaka  <gniibe@fsij.org>

 	* Version 0.03.
--- a/105
+++ b/105
@@ -1,5 +1,110 @@
 NEWS - Noteworthy changes

+
+* Major changes in Chopstx 0.10
+
+  Released 2015-09-15
+
+** Thread cancellation bug fix
+Thread cancellation didn't work well with 0.09 because
+of initial configuration mistake.  It's fixed.
+
+** Interrupt handler bug fix
+Interrupt handler wasn't unregistered on exit well.
+It's fixed.
+
+
+* Major changes in Chopstx 0.09
+
+  Released 2015-09-10
+
+** New board support: Nitrokey-Start
+It is contributed by Mateusz Zalega.
+
+** Thread cancellation
+Add new API: chopstx_setcancelstate.
+
+
+* Major changes in Chopstx 0.08
+
+  Released 2015-07-31
+
+** New board support: ST Nucleo F103
+It is contributed by Kenji Rikitake.
+
+** New board support: ST Dongle
+It is contributed by Kenji Rikitake.
+It's the ST-Link/V2-1 part of ST Nucleo F103.
+
+
+* Major changes in Chopstx 0.07
+
+  Released 2015-07-15
+
+** New Board macro definitions
+Each board-*.h should have BOARD_ID and BOARD_NAME now.
+FLASH_PAGE_SIZE and NEUG_ADC_SETTING2_* are deprecated.
+
+** New sys.c (2.1)
+Flash memory size is probed at runtime now.  System
+service flash pages now include sys_board_id and sys_board_name.
+
+
+* Major changes in Chopstx 0.06
+
+  Released 2015-07-08
+
+** New file: clk_gpio_init.c
+To avoid duplication of code, clock and GPIO initialization code
+is now in this file.
+
+** New board support: STM32 Primer2
+It is contributed by Kaz Kojima.
+
+** New board support: CQ STARM
+The old board which was "published" by CQ Publishing in 2008 is added.
+
+
+* Major changes in Chopstx 0.05
+
+  Released 2015-04-20, by NIIBE Yutaka
+
+** New function: chopstx_main_init
+chopstx_main_init is the function to change the schedule priority of
+main thread.  This is useful to enter main loop after initialization
+of other threads.
+
+** The use of CHX_PRIO_MAIN
+CHX_PRIO_MAIN is deprecated.  Instead, please use the function
+chopstx_main_init.
+
+** Cortex-M0 support
+Cortex-M0 support has been added.
+
+** New board support: Maple mini
+It is contributed by Aidan Thornton.
+
+** New board support: FSM-55 and STM32F0 Discovery
+Those boards with STM32F0 (Cortex-M0) are now supported.
+
+
+* Major changes in Chopstx 0.04
+
+  Released 2014-12-10, by NIIBE Yutaka
+
+** new board.h macros and sys.c in example
+In board.h, RCC_APB2ENR_IOP_EN was renamed to RCC_ENR_IOP_EN and
+RCC_APB2RSTR_IOP_RST was renamed to RCC_RSTR_IOP_RST.  Example sys.c
+was changed accordingly.
+
+** Bug fix of chopstx_wakeup_usec_wait
+chopstx_usec_wait_var/chopstx_usec_wait won't be woken up
+by chopstx_wakeup_usec_wait.  This is now fixed in 0.04.
+
+** Board support STBee and STBee Mini
+The board STBee and STBee Mini are now supported.
+
+
 * Major changes in Chopstx 0.03

  Released 2013-11-08, by NIIBE Yutaka
--- a/29
+++ b/29
@@ -1,17 +1,17 @@
 Chopstx - Threads and only Threads
-							Version 0.03
-							  2013-11-08
+							Version 0.10
+							  2015-09-15
 							Niibe Yutaka
 					     Flying Stone Technology

 What's Chopstx?
 ===============

-Chopstx is an RT thread library for ARM Cortex-M3, specifically,
-STM32F103.
+Chopstx is an RT thread library for STM32F103 (ARM Cortex-M3)
+or STM32F0 (ARM Cortex-M0).

 While most RTOSes come with many features, drivers, and stacks,
-Chopstx just offers a RT thread library.
+Chopstx just offers a simple RT thread library.

 With Chopstx, interrupt handling is also done by a thread.  This
 enables coherent code for ease of maintenance.
@@ -28,11 +28,24 @@ EXCEPTION.
 Example code
 ============

-We have two examples in this distribution, LED blinker and
-USB CDC-ACM function.  You can build it like:
+We have some examples in this distribution; Useful ones are LED
+blinker and USB CDC-ACM function.  For STM32F103, you can build it
+USB CDC-ACM demo by:

   $ cd example-cdc
-   $ ln -s ../board/board-olimex-stm32-h103.h board.h
+   $ ln -sf ../board/board-olimex-stm32-h103.h board.h
   $ make

+For a specific board named FSM-55, an example of LED matrix dynamic
+driver is provided.  See the directory: example-fsm-55.
+
+For STM32 Primer2, see the directory: example-primer2.
+
+
+Future Works
+============
+
+Convenience function to determine bottom of thread stack, thread local
+storage and support of interface like poll/select would be next thing
+to be done.
 -- 
--- a/1
+++ b/1
@@ -0,0 +1 @@
+release/0.10
--- a/board/board-cq-starm.h
+++ b/board/board-cq-starm.h
@@ -0,0 +1,46 @@
+#define BOARD_NAME "CQ STARM"
+#define BOARD_ID    0xc5480875
+
+#define STM32F10X_MD		/* Medium-density device */
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              9
+#define STM32_HSECLK                    8000000
+
+#define GPIO_LED_BASE   GPIOC_BASE
+#define GPIO_LED_SET_TO_EMIT            6
+#undef  GPIO_USB_BASE		/* No external DISCONNECT/RENUM circuit.  */
+#define GPIO_OTHER_BASE GPIOA_BASE
+
+/*
+ * Port A setup.
+ * PA0  - input with pull-up.  AN0
+ * PA1  - input with pull-up.  AN1
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * ------------------------ Default
+ * PAx  - input with pull-up
+ */
+#define VAL_GPIO_OTHER_ODR            0xFFFFE7FF
+#define VAL_GPIO_OTHER_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_OTHER_CRH            0x88811888      /* PA15...PA8 */
+
+/*
+ * Port C setup.
+ * PC0  - Push Pull output 50MHz.
+ * PC1  - Push Pull output 50MHz.
+ * Everything input with pull-up except:
+ * PC4  - Normal input      (ADC_IN14 : VoutY of LIS344ALH).
+ * PC5  - Normal input      (ADC_IN15 : VoutZ of LIS344ALH).
+ * PC6  - Push Pull output (LED).
+ * (PC9  - SDCard CD)
+ * (PC12 - SDCard CS)
+ * PC14 - Normal input (XTAL).
+ * PC15 - Normal input (XTAL).
+ */
+#define VAL_GPIO_LED_CRL            0x83448833      /*  PC7...PC0 */
+#define VAL_GPIO_LED_CRH            0x44888888      /* PC15...PC8 */
+#define VAL_GPIO_LED_ODR            0xFFFFFFFF
+
+#define RCC_ENR_IOP_EN      (RCC_APB2ENR_IOPAEN|RCC_APB2ENR_IOPCEN)
+#define RCC_RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST|RCC_APB2RSTR_IOPCRST)
--- a/board/board-fsm-55.h
+++ b/board/board-fsm-55.h
@@ -0,0 +1,42 @@
+#define BOARD_NAME "FSM-55"
+#define BOARD_ID    0x83433c76
+
+/*
+ * Running at 48MHz with HSI as clock source.
+ * 
+ */
+#define MCU_STM32F0 1
+/* __ARM_ARCH_6M__ */
+
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              12
+#define STM32_HSICLK                    8000000
+
+#define GPIO_LED_BASE           GPIOA_BASE
+#define GPIO_LED_SET_TO_EMIT    5
+#define GPIO_OTHER_BASE         GPIOF_BASE /* USER BUTTON */
+
+/*
+ * Port A setup.
+ * PA5  - ON (LED 1:ON 0:OFF)
+ * PA4  - Pull DOWN
+ */
+#define VAL_GPIO_LED_MODER   0x00145555 /* Output Pin0-7, Pin9 and Pin10 */
+#define VAL_GPIO_LED_OTYPER  0x0000001f /* Open-drain for Pin0-4, Push-Pull*/
+#define VAL_GPIO_LED_OSPEEDR 0x003cffff /* High speed */
+#define VAL_GPIO_LED_PUPDR   0x00000000 /* No pull-up/pull-down */
+
+
+#define RCC_ENR_IOP_EN   (RCC_AHBENR_IOPAEN | RCC_AHBENR_IOPFEN)
+#define RCC_RSTR_IOP_RST (RCC_AHBRSTR_IOPARST | RCC_AHBRSTR_IOPFRST)
+
+/*
+ * Port F setup.
+ * PF0  - USER Button
+ * PF1  - SPEAKER
+ */
+#define VAL_GPIO_OTHER_MODER   0x00000004 /* Input Pin0, Output Pin1 */
+#define VAL_GPIO_OTHER_OTYPER  0x00000000 /* Push-Pull Pin1 */
+#define VAL_GPIO_OTHER_OSPEEDR 0x00000000
+#define VAL_GPIO_OTHER_PUPDR   0x00000009 /* Pull-up Pin0, Pull-down Pin1 */
--- a/board/board-fst-01-00.h
+++ b/board/board-fst-01-00.h
@@ -1,11 +1,17 @@
-#define FLASH_PAGE_SIZE 1024
+#define BOARD_NAME "FST-01-00"
+#define BOARD_ID    0x613870a9
+
+#define STM32F10X_MD		/* Medium-density device */

 #define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
 #define STM32_PLLMUL_VALUE              9
 #define STM32_HSECLK                    8000000

-#define GPIO_USB_SET_TO_ENABLE          10
+#define GPIO_LED_BASE   GPIOA_BASE
 #define GPIO_LED_SET_TO_EMIT            8
+#define GPIO_USB_BASE   GPIOA_BASE
+#define GPIO_USB_SET_TO_ENABLE          10
+#undef  GPIO_OTHER_BASE

 /*
 * Port A setup.
@@ -18,14 +24,9 @@
 * ------------------------ Default
 * PAx  - input with pull-up
 */
-#define VAL_GPIO_ODR            0xFFFFE7FF
-#define VAL_GPIO_CRL            0x88888888      /*  PA7...PA0 */
-#define VAL_GPIO_CRH            0x88811383      /* PA15...PA8 */
+#define VAL_GPIO_LED_ODR            0xFFFFE7FF
+#define VAL_GPIO_LED_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x88811383      /* PA15...PA8 */

-#define GPIO_USB_BASE   GPIOA_BASE
-#define GPIO_LED_BASE   GPIOA_BASE
-
-#define RCC_APB2ENR_IOP_EN      RCC_APB2ENR_IOPAEN
-#define RCC_APB2RSTR_IOP_RST    RCC_APB2RSTR_IOPARST
-
-/* NeuG settings for ADC2 is default (PA0: Analog IN0, PA1: Analog IN1).  */
+#define RCC_ENR_IOP_EN      RCC_APB2ENR_IOPAEN
+#define RCC_RSTR_IOP_RST    RCC_APB2RSTR_IOPARST
--- a/board/board-fst-01.h
+++ b/board/board-fst-01.h
@@ -1,24 +1,18 @@
-#define FLASH_PAGE_SIZE 1024
+#define BOARD_NAME "FST-01"
+#define BOARD_ID    0x696886af
+/* echo -n "FST-01" | sha256sum | sed -e 's/^.*\(........\)  -$/\1/' */
+
+#define STM32F10X_MD		/* Medium-density device */

 #define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
 #define STM32_PLLMUL_VALUE              6
 #define STM32_HSECLK                    12000000

-#define GPIO_USB_SET_TO_ENABLE          10
+#define GPIO_LED_BASE   GPIOB_BASE
 #define GPIO_LED_SET_TO_EMIT            0
-
-/* For pin-cir settings of Gnuk */
-#define TIMx                  TIM2
-#define INTR_REQ_TIM          TIM2_IRQ
-#define AFIO_EXTICR_INDEX     0
-#define AFIO_EXTICR1_EXTIx_Py AFIO_EXTICR1_EXTI2_PA
-#define EXTI_PR               EXTI_PR_PR2
-#define EXTI_IMR              EXTI_IMR_MR2
-#define EXTI_FTSR_TR          EXTI_FTSR_TR2
-#define INTR_REQ_EXTI         EXTI2_IRQ
-#define ENABLE_RCC_APB1
-#define RCC_APBnENR_TIMxEN    RCC_APB1ENR_TIM2EN
-#define RCC_APBnRSTR_TIMxRST  RCC_APB1RSTR_TIM2RST
+#define GPIO_USB_BASE   GPIOA_BASE
+#define GPIO_USB_SET_TO_ENABLE          10
+#undef  GPIO_OTHER_BASE

 /*
 * Port A setup.
@@ -40,9 +34,9 @@
 * PA14 - input with pull-up.
 * PA15 - input with pull-up.
 */
-#define VAL_GPIO_ODR            0xFFFFE7FD
-#define VAL_GPIO_CRL            0xBBB38888      /*  PA7...PA0 */
-#define VAL_GPIO_CRH            0x88811388      /* PA15...PA8 */
+#define VAL_GPIO_USB_ODR            0xFFFFE7FD
+#define VAL_GPIO_USB_CRL            0xBBB38888      /*  PA7...PA0 */
+#define VAL_GPIO_USB_CRH            0x88811388      /* PA15...PA8 */

 /*
 * Port B setup.
@@ -55,16 +49,36 @@
 #define VAL_GPIO_LED_CRL            0x88888883      /*  PA7...PA0 */
 #define VAL_GPIO_LED_CRH            0x88888888      /* PA15...PA8 */

-#define GPIO_USB_BASE   GPIOA_BASE
-#define GPIO_LED_BASE   GPIOB_BASE
+#define RCC_ENR_IOP_EN      (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN)
+#define RCC_RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST)

-#define RCC_APB2ENR_IOP_EN      (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN)
-#define RCC_APB2RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST)
-
-/* NeuG settings for ADC2.  */
-#define NEUG_ADC_SETTING2_SMPR1 0
-#define NEUG_ADC_SETTING2_SMPR2 ADC_SMPR2_SMP_AN0(ADC_SAMPLE_1P5)    \
-                              | ADC_SMPR2_SMP_AN9(ADC_SAMPLE_1P5)
-#define NEUG_ADC_SETTING2_SQR3  ADC_SQR3_SQ1_N(ADC_CHANNEL_IN0)      \
-                              | ADC_SQR3_SQ2_N(ADC_CHANNEL_IN9)
-#define NEUG_ADC_SETTING2_NUM_CHANNELS 2
+/*
+ * Board specific information other than clock and GPIO initial
+ * setting should not be in board-*.h, but each driver should include
+ * information by itself.
+ *
+ * Please see NeuG's ADC driver how board specific handling is done.
+ *
+ * Given the situation of Chopstx's boards support, which is not that
+ * huge, this works well.  If scalability and flexibility will matter,
+ * we will need something like device tree in which boot process can
+ * pass information to application program.
+ *
+ * Following constants are here, because experimental CIR driver is
+ * written before this design decision of Chopstx.
+ *
+ * Those will be removed soon, once such an driver will be improved
+ * in new style.
+ */
+/* For pin-cir settings of Gnuk */
+#define TIMx                  TIM2
+#define INTR_REQ_TIM          TIM2_IRQ
+#define AFIO_EXTICR_INDEX     0
+#define AFIO_EXTICR1_EXTIx_Py AFIO_EXTICR1_EXTI2_PA
+#define EXTI_PR               EXTI_PR_PR2
+#define EXTI_IMR              EXTI_IMR_MR2
+#define EXTI_FTSR_TR          EXTI_FTSR_TR2
+#define INTR_REQ_EXTI         EXTI2_IRQ
+#define ENABLE_RCC_APB1
+#define RCC_APBnENR_TIMxEN    RCC_APB1ENR_TIM2EN
+#define RCC_APBnRSTR_TIMxRST  RCC_APB1RSTR_TIM2RST
--- a/board/board-maple-mini.h
+++ b/board/board-maple-mini.h
@@ -0,0 +1,41 @@
+#define BOARD_NAME "Maple Mini"
+#define BOARD_ID    0x7a445272
+
+#define STM32F10X_MD		/* Medium-density device */
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              9
+#define STM32_HSECLK                    8000000
+
+#define GPIO_LED_BASE   GPIOB_BASE
+#define GPIO_LED_SET_TO_EMIT            1
+#define GPIO_USB_BASE   GPIOB_BASE
+#define GPIO_USB_CLEAR_TO_ENABLE        9
+#define GPIO_OTHER_BASE GPIOA_BASE
+
+/*
+ * Port A setup.
+ * PA0  - input with pull-up.  AN0
+ * PA1  - input with pull-up.  AN1
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * ------------------------ Default
+ * PAx  - input with pull-up
+ */
+#define VAL_GPIO_OTHER_ODR            0xFFFFE7FF
+#define VAL_GPIO_OTHER_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_OTHER_CRH            0x88811888      /* PA15...PA8 */
+
+/*
+ * Port B setup.
+ * PB1  - Push pull output 50MHz (LED 1:ON 0:OFF)
+ * PB9  - Push pull output 50MHz (USB 1:ON 0:OFF)
+ * ------------------------ Default
+ * PBx  - input with pull-up
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFFFFF
+#define VAL_GPIO_LED_CRL            0x88888838      /*  PB7...PB0 */
+#define VAL_GPIO_LED_CRH            0x88888838      /* PB15...PB8 */
+
+#define RCC_ENR_IOP_EN      (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN)
+#define RCC_RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST)
--- a/board/board-nitrokey-start.h
+++ b/board/board-nitrokey-start.h
@@ -0,0 +1,59 @@
+#define BOARD_NAME "NITROKEY-START"
+#define BOARD_ID    0xad1e7ebd
+
+#define STM32F10X_MD		/* Medium-density device */
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              6
+#define STM32_HSECLK                    12000000
+
+#define GPIO_LED_BASE   GPIOB_BASE
+#define GPIO_LED_SET_TO_EMIT            0
+#define GPIO_USB_BASE   GPIOA_BASE
+#define GPIO_USB_SET_TO_ENABLE          15
+#undef  GPIO_OTHER_BASE
+
+/*
+ * Port A setup.
+ * PA0 - input with pull-up: AN0 for NeuG
+ * PA1 - input with pull-up: AN1 for NeuG
+ * PA2 - floating input
+ * PA3 - floating input
+ * PA4 - floating input
+ * PA5 - floating input
+ * PA6 - floating input
+ * PA7 - Push pull output   (LED1 1:ON 0:OFF)
+ * PA8 - floating input (smartcard, SCDSA)
+ * PA9 - floating input
+ * PA10 - floating input
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM)
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * PA15 - Push pull output  (USB_EN 1:ON 0:OFF)
+ * ------------------------ Default
+ * PA8  - input with pull-up.
+ * PA9  - floating input.
+ * PA10 - floating input.
+ * PA13 - input with pull-up.
+ * PA14 - input with pull-up.
+ * PA15 - Push pull output   (USB 1:ON 0:OFF)
+ */
+#define VAL_GPIO_USB_ODR            0xFFFFE7FF
+#define VAL_GPIO_USB_CRL            0x34444488      /*  PA7...PA0 */
+#define VAL_GPIO_USB_CRH            0x38811444      /* PA15...PA8 */
+
+/*
+ * Port B setup.
+ * PB0  - Push pull output   (LED2 1:ON 0:OFF)
+ * ------------------------ Default
+ * PBx  - input with pull-up.
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFFFFF
+#define VAL_GPIO_LED_CRL            0x88888883      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x88888888      /* PA15...PA8 */
+
+#define RCC_ENR_IOP_EN      \
+	(RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_AFIOEN)
+#define RCC_RSTR_IOP_RST    \
+	(RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST | RCC_APB2RSTR_AFIORST)
+
+#define AFIO_MAPR_SOMETHING   AFIO_MAPR_SWJ_CFG_JTAGDISABLE
--- a/board/board-olimex-stm32-h103.h
+++ b/board/board-olimex-stm32-h103.h
@@ -1,11 +1,17 @@
-#define FLASH_PAGE_SIZE 1024
+#define BOARD_NAME "Olimex STM32-H103"
+#define BOARD_ID    0xf92bb594
+
+#define STM32F10X_MD		/* Medium-density device */

 #define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
 #define STM32_PLLMUL_VALUE              9
 #define STM32_HSECLK                    8000000

-#define GPIO_USB_CLEAR_TO_ENABLE        11
+#define GPIO_LED_BASE   GPIOC_BASE
 #define GPIO_LED_CLEAR_TO_EMIT          12
+#define GPIO_USB_BASE   GPIOC_BASE
+#define GPIO_USB_CLEAR_TO_ENABLE        11
+#undef  GPIO_OTHER_BASE

 /*
 * Port C setup.
@@ -18,15 +24,12 @@
 * ------------------------ Default
 * PCx  - input with pull-up
 */
-#define VAL_GPIO_ODR            0xFFFFFFFF
-#define VAL_GPIO_CRL            0x44888888      /*  PC7...PC0 */
-#define VAL_GPIO_CRH            0x88837888      /* PC15...PC8 */
+#define VAL_GPIO_LED_ODR            0xFFFFFFFF
+#define VAL_GPIO_LED_CRL            0x44888888      /*  PC7...PC0 */
+#define VAL_GPIO_LED_CRH            0x88837888      /* PC15...PC8 */

-#define GPIO_USB_BASE   GPIOC_BASE
-#define GPIO_LED_BASE   GPIOC_BASE
-
-#define RCC_APB2ENR_IOP_EN      RCC_APB2ENR_IOPCEN
-#define RCC_APB2RSTR_IOP_RST    RCC_APB2RSTR_IOPCRST
+#define RCC_ENR_IOP_EN      RCC_APB2ENR_IOPCEN
+#define RCC_RSTR_IOP_RST    RCC_APB2RSTR_IOPCRST

 /* NeuG settings for ADC2.  */
 #define NEUG_ADC_SETTING2_SMPR1 ADC_SMPR1_SMP_AN10(ADC_SAMPLE_1P5) \
--- a/board/board-st-dongle.h
+++ b/board/board-st-dongle.h
@@ -0,0 +1,33 @@
+#define BOARD_NAME "ST Dongle"
+/* echo -n "ST Dongle" | shasum -a 256 | sed -e 's/^.*\(........\)  -$/\1/' */
+#define BOARD_ID    0x2cd4e471
+
+#define STM32F10X_MD		/* Medium-density device */
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              9
+#define STM32_HSECLK                    8000000
+
+#define GPIO_LED_BASE   GPIOA_BASE
+#define GPIO_LED_SET_TO_EMIT            9
+#define GPIO_USB_BASE   GPIOA_BASE
+#define GPIO_USB_SET_TO_ENABLE          15
+#undef  GPIO_OTHER_BASE
+
+/*
+ * Port A setup.
+ * PA0  - input with pull-up.  AN0
+ * PA1  - input with pull-up.  AN1
+ * PA9  - Push pull output 50MHz (LED 1:ON 0:OFF)
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * PA15 - Push pull output 50MHz (USB 1:ON 0:OFF)
+ * ------------------------ Default
+ * PAx  - input with pull-up
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFE7FF
+#define VAL_GPIO_LED_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x38811838      /* PA15...PA8 */
+
+#define RCC_ENR_IOP_EN      RCC_APB2ENR_IOPAEN
+#define RCC_RSTR_IOP_RST    RCC_APB2RSTR_IOPARST
--- a/board/board-st-nucleo-f103.h
+++ b/board/board-st-nucleo-f103.h
@@ -0,0 +1,45 @@
+#define BOARD_NAME "ST Nucleo F103"
+#define BOARD_ID    0x9b87c16d
+
+/*
+ * Please add X3 and USB cable to ST Nucleo F103.
+ *
+ * Solder X3 XTAL of 8MHz (and put C33 and C34 of 22pF).  
+ * Solder the bridges for R35 and R37, since it's 0 ohm. 
+ *
+ * (Optional) Remove SB54 and SB55.
+ *
+ * At CN10, connect USB cable
+ *  Vbus RED   --> 10 NC   ----------> CN7 (6 E5V)
+ *  D+   GREEN --> 12 PA11 ---[1K5]--> CN6 (4 3V3)
+ *  D-   WHITE --> 14 PA12
+ *  GND  BLACK --> 20 GND
+ */
+
+#define STM32F10X_MD		/* Medium-density device */
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              9
+#define STM32_HSECLK                    8000000
+
+#define GPIO_LED_BASE   GPIOA_BASE
+#define GPIO_LED_SET_TO_EMIT            5
+#undef  GPIO_USB_BASE		/* No external DISCONNECT/RENUM circuit.  */
+#undef  GPIO_OTHER_BASE
+
+/*
+ * Port A setup.
+ * PA0  - input with pull-up.  AN0
+ * PA1  - input with pull-up.  AN1
+ * PA5  - Push pull output 50MHz (LED 1:ON 0:OFF)
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * ------------------------ Default
+ * PAx  - input with pull-up
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFE7FF
+#define VAL_GPIO_LED_CRL            0x88388888      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x88811888      /* PA15...PA8 */
+
+#define RCC_ENR_IOP_EN      RCC_APB2ENR_IOPAEN
+#define RCC_RSTR_IOP_RST    RCC_APB2RSTR_IOPARST
--- a/board/board-stbee-mini.h
+++ b/board/board-stbee-mini.h
@@ -0,0 +1,113 @@
+#define BOARD_NAME "STBee Mini"
+#define BOARD_ID    0x1f341961
+
+#define STM32F10X_MD		/* Medium-density device */
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              6
+#define STM32_HSECLK                    12000000
+
+#define GPIO_LED_BASE           GPIOA_BASE
+#define GPIO_LED_CLEAR_TO_EMIT          13
+#define GPIO_USB_BASE           GPIOA_BASE
+#define GPIO_USB_SET_TO_ENABLE          14
+
+#if defined(PINPAD_CIR_SUPPORT) || defined(PINPAD_DIAL_SUPPORT)
+#define HAVE_7SEGLED	1
+/*
+ * Timer assignment for CIR
+ */
+#define TIMx                  TIM3
+#define INTR_REQ_TIM          TIM3_IRQ
+#define AFIO_EXTICR_INDEX     0
+#endif
+
+#if defined(PINPAD_CIR_SUPPORT)
+#define AFIO_EXTICR1_EXTIx_Py AFIO_EXTICR1_EXTI0_PB
+#define EXTI_PR               EXTI_PR_PR0
+#define EXTI_IMR              EXTI_IMR_MR0
+#define EXTI_FTSR_TR          EXTI_FTSR_TR0
+#define INTR_REQ_EXTI         EXTI0_IRQ
+#define RCC_APBnENR_TIMxEN    RCC_APB1ENR_TIM3EN
+#define RCC_APBnRSTR_TIMxRST  RCC_APB1RSTR_TIM3RST
+#elif defined(PINPAD_DIAL_SUPPORT)
+#define AFIO_EXTICR1_EXTIx_Py AFIO_EXTICR1_EXTI2_PB
+#define EXTI_PR               EXTI_PR_PR2
+#define EXTI_IMR              EXTI_IMR_MR2
+#define EXTI_FTSR_TR          EXTI_FTSR_TR2
+#define INTR_REQ_EXTI         EXTI2_IRQ
+#define RCC_APBnENR_TIMxEN    RCC_APB1ENR_TIM4EN
+#define RCC_APBnRSTR_TIMxRST  RCC_APB1RSTR_TIM4RST
+#endif
+#define ENABLE_RCC_APB1
+
+#if defined(PINPAD_CIR_SUPPORT) || defined(PINPAD_DIAL_SUPPORT)
+/*
+ * Port A setup.
+ * PA1  - Digital input with PullUp.  AN1 for NeuG
+ * PA2  - Digital input with PullUp.  AN2 for NeuG
+ * PA6  - (TIM3_CH1) input with pull-up
+ * PA7  - (TIM3_CH2) input with pull-down
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM)
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * PA13 - Open Drain output (LED1 0:ON 1:OFF)
+ * PA14 - Push pull output  (USB ENABLE 0:DISABLE 1:ENABLE)
+ * PA15 - Open Drain output (LED2 0:ON 1:OFF)
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFE77F
+#define VAL_GPIO_LED_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x63611888      /* PA15...PA8 */
+
+#define GPIO_OTHER_BASE          GPIOB_BASE
+/*
+ * Port B setup.
+ * PB0  - Push pull output   (LED 1:ON 0:OFF)
+ * ------------------------ Default
+ * PBx  - input with pull-up.
+ */
+#define VAL_GPIO_OTHER_ODR            0xFFFFFFFF
+#define VAL_GPIO_OTHER_CRL            0x88888888      /*  PB7...PB0 */
+#define VAL_GPIO_OTHER_CRH            0x66666666      /* PB15...PB8 */
+
+/* Port B setup. */
+#define GPIOB_CIR               0
+#define GPIOB_BUTTON            2
+#define GPIOB_ROT_A             6
+#define GPIOB_ROT_B             7
+
+#define GPIOB_7SEG_DP           15
+#define GPIOB_7SEG_A            14
+#define GPIOB_7SEG_B            13
+#define GPIOB_7SEG_C            12
+#define GPIOB_7SEG_D            11
+#define GPIOB_7SEG_E            10
+#define GPIOB_7SEG_F            9
+#define GPIOB_7SEG_G            8
+
+#define RCC_ENR_IOP_EN      \
+        (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_AFIOEN)
+#define RCC_RSTR_IOP_RST    \
+        (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST | RCC_APB2RSTR_AFIORST)
+#else
+/*
+ * Port A setup.
+ * PA1  - Digital input with PullUp.  AN1 for NeuG
+ * PA2  - Digital input with PullUp.  AN2 for NeuG
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM)
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * PA13 - Open Drain output (LED1 0:ON 1:OFF)
+ * PA14 - Push pull output  (USB ENABLE 0:DISABLE 1:ENABLE)
+ * PA15 - Open Drain output (LED2 0:ON 1:OFF)
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFE7FF
+#define VAL_GPIO_LED_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x63611888      /* PA15...PA8 */
+
+#undef  GPIO_OTHER_BASE
+
+#define RCC_ENR_IOP_EN      (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_AFIOEN)
+#define RCC_RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_AFIORST)
+#endif
+
+
+#define AFIO_MAPR_SOMETHING     AFIO_MAPR_SWJ_CFG_DISABLE
--- a/board/board-stbee.h
+++ b/board/board-stbee.h
@@ -0,0 +1,34 @@
+#define BOARD_NAME "STBee"
+#define BOARD_ID    0x945c37e8
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              6
+#define STM32_HSECLK                    12000000
+
+#define GPIO_LED_BASE   GPIOD_BASE
+#define GPIO_LED_CLEAR_TO_EMIT          4
+#define GPIO_USB_BASE   GPIOD_BASE
+#define GPIO_USB_CLEAR_TO_ENABLE        3
+#define GPIO_OTHER_BASE GPIOA_BASE
+
+/*
+ * Port A setup.
+ * PA0  - Normal input.
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM)
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ */
+#define VAL_GPIO_OTHER_ODR      0xFFFFE7FF
+#define VAL_GPIO_OTHER_CRL      0x88888884      /*  PA7...PA0 */
+#define VAL_GPIO_OTHER_CRH      0x88811888      /* PA15...PA8 */
+
+#define RCC_ENR_IOP_EN      (RCC_APB2ENR_IOPAEN|RCC_APB2ENR_IOPDEN)
+#define RCC_RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST|RCC_APB2RSTR_IOPDRST)
+
+/*
+ * Port D setup.
+ * PD3  - Push pull output  (USB_DISC 1:USB-DISABLE 0:USB-ENABLE) 2MHz
+ * PD4  - Open Drain output 2MHz (LED1).
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFFFFF
+#define VAL_GPIO_LED_CRL            0x88862888      /*  PD7...PD0 */
+#define VAL_GPIO_LED_CRH            0x88888888      /* PD15...PD8 */
--- a/board/board-stm32-primer2.h
+++ b/board/board-stm32-primer2.h
@@ -0,0 +1,56 @@
+#define BOARD_NAME "STM32 Primer2"
+#define BOARD_ID    0x21e5798d
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              6
+#define STM32_HSECLK                    12000000
+
+#define GPIO_LED_BASE   GPIOE_BASE
+#define GPIO_LED_SET_TO_EMIT            0
+#define GPIO_USB_BASE   GPIOD_BASE
+#define GPIO_USB_CLEAR_TO_ENABLE        3
+#define GPIO_OTHER_BASE GPIOA_BASE
+
+/*
+ * Port A setup.
+ * PA0  - input with pull-up.  AN0
+ * PA1  - input with pull-up.  AN1
+ * PA8  - Input with pull-down (PBUTTON).
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * ------------------------ Default
+ * PAx  - input with pull-up
+ */
+#define VAL_GPIO_OTHER_ODR            0xFFFFE6FF
+#define VAL_GPIO_OTHER_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_OTHER_CRH            0x88811888      /* PA15...PA8 */
+
+/*
+ * Port D setup.
+ * PD3  - Push pull output 50MHz (USB 1:ON 0:OFF)
+ * ------------------------ Default
+ * PDx  - input with pull-up
+ */
+#define VAL_GPIO_USB_ODR            0xFFFFFFFF
+#define VAL_GPIO_USB_CRL            0x88883888      /*  PD7...PD0 */
+#define VAL_GPIO_USB_CRH            0x88888888      /* PD15...PD8 */
+
+/*
+ * Port E setup.
+ * PE0  - Push pull output   (LED 1:ON 0:OFF)
+ * PE1  - Push pull output   (LED 1:ON 0:OFF)
+ * PE3  - Input with pull-down (JOYSTICK L).
+ * PE4  - Input with pull-down (JOYSTICK R).
+ * PE5  - Input with pull-down (JOYSTICK U).
+ * PE6  - Input with pull-down (JOYSTICK D).
+ * ------------------------ Default
+ * PEx  - input with pull-up
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFFF87
+#define VAL_GPIO_LED_CRL            0x88888833      /*  PE7...PE0 */
+#define VAL_GPIO_LED_CRH            0x88888888      /* PE15...PE8 */
+
+#define RCC_ENR_IOP_EN \
+	(RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPDEN | RCC_APB2ENR_IOPEEN)
+#define RCC_RSTR_IOP_RST \
+	(RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPDRST | RCC_APB2RSTR_IOPERST)
--- a/board/board-stm32f0-discovery.h
+++ b/board/board-stm32f0-discovery.h
@@ -0,0 +1,48 @@
+#define BOARD_NAME "STM32F0 Discovery"
+#define BOARD_ID    0xde4b4bc1
+
+/*
+ * Running at 48MHz with HSI as clock source.
+ * 
+ */
+#define MCU_STM32F0 1
+/* __ARM_ARCH_6M__ */
+
+
+#define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
+#define STM32_PLLMUL_VALUE              12
+#define STM32_HSICLK                    8000000
+
+#define GPIO_LED_BASE           GPIOC_BASE
+#define GPIO_LED_SET_TO_EMIT    8
+#define GPIO_OTHER_BASE         GPIOA_BASE /* USER BUTTON */
+
+/*
+ * Port C setup.
+ * PC9  - LED3 (LED 1:ON 0:OFF)
+ * PC8  - LED4 (LED 1:ON 0:OFF)
+ */
+#define VAL_GPIO_LED_MODER   0x00050000 /* Output Pin9 and Pin8 */
+#define VAL_GPIO_LED_OTYPER  0x00000000 /* Push-Pull */
+#define VAL_GPIO_LED_OSPEEDR 0x000f0000 /* High speed: Pin9 and Pin8 */
+#define VAL_GPIO_LED_PUPDR   0x00000000 /* No pull-up/pull-down */
+
+
+#if 0
+#define RCC_ENR_IOP_EN   (RCC_AHBENR_IOPAEN | RCC_AHBENR_IOPCEN)
+#define RCC_RSTR_IOP_RST (RCC_AHBRSTR_IOPARST | RCC_AHBRSTR_IOPCRST)
+#else
+#define RCC_ENR_IOP_EN   RCC_AHBENR_IOPCEN
+#define RCC_RSTR_IOP_RST RCC_AHBRSTR_IOPCRST
+#endif
+
+/* ??? NeuG settings for ADC2 is default (PA0: Analog IN0, PA1: Analog IN1).  */
+
+/*
+ * Port A setup.
+ * PA0  - USER Button
+ */
+#define VAL_GPIO_OTHER_MODER   0x00000000 /* Input Pin0 */
+#define VAL_GPIO_OTHER_OTYPER  0x00000000 /* Push-Pull */
+#define VAL_GPIO_OTHER_OSPEEDR 0x00000000
+#define VAL_GPIO_OTHER_PUPDR   0x00000000 /* No pull-up/pull-down */
--- a/board/board-stm8s-discovery.h
+++ b/board/board-stm8s-discovery.h
@@ -1,11 +1,47 @@
-#define FLASH_PAGE_SIZE 1024
+#define BOARD_NAME "STM8S Discovery"
+#define BOARD_ID    0x2f0976bb
+
+#define STM32F10X_MD		/* Medium-density device */

 #define STM32_PLLXTPRE                  STM32_PLLXTPRE_DIV1
 #define STM32_PLLMUL_VALUE              9
 #define STM32_HSECLK                    8000000

-#undef  GPIO_USB_CLEAR_TO_ENABLE
+#define GPIO_LED_BASE   GPIOA_BASE
 #define GPIO_LED_SET_TO_EMIT            8
+#undef  GPIO_USB_BASE		/* No external DISCONNECT/RENUM circuit.  */
+#define GPIO_OTHER_BASE GPIOB_BASE
+
+/*
+ * Port A setup.
+ * PA0  - input with pull-up.  AN0
+ * PA1  - input with pull-up.  AN1
+ * PA8  - Push pull output 10MHz (LED 1:ON 0:OFF)
+ * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
+ * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
+ * ------------------------ Default
+ * PAx  - input with pull-up
+ */
+#define VAL_GPIO_LED_ODR            0xFFFFE7FF
+#define VAL_GPIO_LED_CRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIO_LED_CRH            0x88811881      /* PA15...PA8 */
+
+#define RCC_ENR_IOP_EN   \
+  (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_AFIOEN)
+#define RCC_RSTR_IOP_RST \
+  (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST | RCC_APB2RSTR_AFIORST)
+
+/*
+ * Port B setup.
+ * PB4  - (TIM3_CH1) input with pull-up
+ * PB5  - (TIM3_CH2) input with pull-up, connected to CIR module
+ * Everything input with pull-up except:
+ * PB0  - (TIM3_CH3) input with pull-down
+ */
+#define VAL_GPIO_OTHER_ODR 0xFFFFFFFE
+#define VAL_GPIO_OTHER_CRL 0x88888888      /*  PB7...PB0 */
+#define VAL_GPIO_OTHER_CRH 0x88888888      /* PB15...PB8 */
+

 /* For pin-cir settings of Gnuk */
 #define TIMx                  TIM3
@@ -21,39 +57,3 @@
 #define RCC_APBnRSTR_TIMxRST  RCC_APB1RSTR_TIM3RST
 #define AFIO_MAPR_SOMETHING   AFIO_MAPR_TIM3_REMAP_PARTIALREMAP
                              /* Remap (PB4, PB5) -> (TIM3_CH1, TIM3_CH2) */
-
-/*
- * Port A setup.
- * PA0  - input with pull-up.  AN0
- * PA1  - input with pull-up.  AN1
- * PA8  - Push pull output 10MHz (LED 1:ON 0:OFF)
- * PA11 - Push Pull output 10MHz 0 default (until USB enabled) (USBDM) 
- * PA12 - Push Pull output 10MHz 0 default (until USB enabled) (USBDP)
- * ------------------------ Default
- * PAx  - input with pull-up
- */
-#define VAL_GPIO_ODR            0xFFFFE7FF
-#define VAL_GPIO_CRL            0x88888888      /*  PA7...PA0 */
-#define VAL_GPIO_CRH            0x88811881      /* PA15...PA8 */
-
-#define GPIO_USB_BASE   GPIOA_BASE
-#define GPIO_LED_BASE   GPIOA_BASE
-
-#define RCC_APB2ENR_IOP_EN   \
-  (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_AFIOEN)
-#define RCC_APB2RSTR_IOP_RST \
-  (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST | RCC_APB2RSTR_AFIORST)
-
-/* NeuG settings for ADC2 is default (PA0: Analog IN0, PA1: Analog IN1).  */
-
-#define GPIO_OTHER_BASE GPIOB_BASE
-/*
- * Port B setup.
- * PB4  - (TIM3_CH1) input with pull-up
- * PB5  - (TIM3_CH2) input with pull-up, connected to CIR module
- * Everything input with pull-up except:
- * PB0  - (TIM3_CH3) input with pull-down
- */
-#define VAL_GPIO_OTHER_ODR 0xFFFFFFFE
-#define VAL_GPIO_OTHER_CRL 0x88888888      /*  PB7...PB0 */
-#define VAL_GPIO_OTHER_CRH 0x88888888      /* PB15...PB8 */
--- a/chopstx.c
+++ b/chopstx.c
--- a/chopstx.h
+++ b/chopstx.h
@@ -31,6 +31,8 @@ typedef uint8_t chopstx_prio_t;

 extern chopstx_t chopstx_main;

+void chopstx_main_init (chopstx_prio_t);
+
 /* NOTE: This signature is different to PTHREAD's one.  */
 chopstx_t
 chopstx_create (uint32_t flags_and_prio,
@@ -82,7 +84,6 @@ void chopstx_cond_broadcast (chopstx_cond_t *cond);

 typedef struct chx_intr {
  struct chx_intr *next;
-  struct chx_spinlock lock;
  struct chx_thread *tp;
  uint32_t ready;
  uint8_t irq_num;
@@ -118,6 +119,9 @@ enum {
 void chopstx_cancel (chopstx_t thd);
 void chopstx_testcancel (void);

+/* NOTE: This signature is different to PTHREAD's one.  */
+int chopstx_setcancelstate (int);
+
 struct chx_cleanup {
  struct chx_cleanup *next;
  void (*routine) (void *);
--- a/clk_gpio_init.c
+++ b/clk_gpio_init.c
@@ -0,0 +1,368 @@
+/*
+ * clk_gpio_init.c - Clock and GPIO initialization.
+ *
+ * Copyright (C) 2015  Flying Stone Technology
+ * Author: NIIBE Yutaka <gniibe@fsij.org>
+ *
+ * This file is a part of Chopstx, a thread library for embedded.
+ *
+ * Chopstx is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chopstx is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As additional permission under GNU GPL version 3 section 7, you may
+ * distribute non-source form of the Program without the copy of the
+ * GNU GPL normally required by section 4, provided you inform the
+ * receipents of GNU GPL by a written offer.
+ *
+ */
+
+#define STM32_SW_HSI		(0 << 0)
+#define STM32_SW_PLL		(2 << 0)
+#define STM32_PLLSRC_HSI	(0 << 16)
+#define STM32_PLLSRC_HSE	(1 << 16)
+
+#define STM32_PLLXTPRE_DIV1	(0 << 17)
+#define STM32_PLLXTPRE_DIV2	(1 << 17)
+
+#define STM32_HPRE_DIV1		(0 << 4)
+
+#define STM32_PPRE1_DIV1	(0 << 8)
+#define STM32_PPRE1_DIV2	(4 << 8)
+
+#define STM32_PPRE2_DIV1        (0 << 11)
+#define STM32_PPRE2_DIV2	(4 << 11)
+
+#define STM32_ADCPRE_DIV4	(1 << 14)
+#define STM32_ADCPRE_DIV6       (2 << 14)
+
+#define STM32_USBPRE_DIV1P5     (0 << 22)
+
+#define STM32_MCO_NOCLOCK	(0 << 24)
+
+#if defined(MCU_STM32F0)
+#define STM32_PPRE1		STM32_PPRE1_DIV1
+#define STM32_PLLSRC		STM32_PLLSRC_HSI
+#define STM32_FLASHBITS		0x00000011
+#define STM32_PLLCLKIN		(STM32_HSICLK / 2)
+#else
+#define STM32_PPRE1		STM32_PPRE1_DIV2
+#define STM32_PLLSRC		STM32_PLLSRC_HSE
+#define STM32_FLASHBITS		0x00000012
+#define STM32_PLLCLKIN		(STM32_HSECLK / 1)
+#endif
+
+#define STM32_SW		STM32_SW_PLL
+#define STM32_HPRE		STM32_HPRE_DIV1
+#define STM32_PPRE2		STM32_PPRE2_DIV1
+#define STM32_ADCPRE		STM32_ADCPRE_DIV6
+#define STM32_MCOSEL		STM32_MCO_NOCLOCK
+#define STM32_USBPRE            STM32_USBPRE_DIV1P5
+
+#define STM32_PLLMUL		((STM32_PLLMUL_VALUE - 2) << 18)
+#define STM32_PLLCLKOUT		(STM32_PLLCLKIN * STM32_PLLMUL_VALUE)
+#define STM32_SYSCLK		STM32_PLLCLKOUT
+#define STM32_HCLK		(STM32_SYSCLK / 1)
+
+
+#define PERIPH_BASE	0x40000000
+#define APBPERIPH_BASE   PERIPH_BASE
+#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
+#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
+#define AHB2PERIPH_BASE	(PERIPH_BASE + 0x08000000)
+
+struct RCC {
+  volatile uint32_t CR;
+  volatile uint32_t CFGR;
+  volatile uint32_t CIR;
+  volatile uint32_t APB2RSTR;
+  volatile uint32_t APB1RSTR;
+  volatile uint32_t AHBENR;
+  volatile uint32_t APB2ENR;
+  volatile uint32_t APB1ENR;
+  volatile uint32_t BDCR;
+  volatile uint32_t CSR;
+#if defined(MCU_STM32F0)
+  volatile uint32_t AHBRSTR;
+  volatile uint32_t CFGR2;
+  volatile uint32_t CFGR3;
+  volatile uint32_t CR2;
+#endif
+};
+
+#define RCC_BASE		(AHBPERIPH_BASE + 0x1000)
+static struct RCC *const RCC = ((struct RCC *const)RCC_BASE);
+
+#define RCC_APB1ENR_USBEN	0x00800000
+#define RCC_APB1RSTR_USBRST	0x00800000
+
+#define RCC_CR_HSION		0x00000001
+#define RCC_CR_HSIRDY		0x00000002
+#define RCC_CR_HSITRIM		0x000000F8
+#define RCC_CR_HSEON		0x00010000
+#define RCC_CR_HSERDY		0x00020000
+#define RCC_CR_PLLON		0x01000000
+#define RCC_CR_PLLRDY		0x02000000
+
+#define RCC_CFGR_SWS		0x0000000C
+#define RCC_CFGR_SWS_HSI	0x00000000
+
+#define RCC_AHBENR_CRCEN        0x0040
+
+#if defined(MCU_STM32F0)
+#define RCC_AHBRSTR_IOPARST	0x00020000
+#define RCC_AHBRSTR_IOPBRST	0x00040000
+#define RCC_AHBRSTR_IOPCRST	0x00080000
+#define RCC_AHBRSTR_IOPDRST	0x00100000
+#define RCC_AHBRSTR_IOPFRST	0x00400000
+
+#define RCC_AHBENR_IOPAEN	0x00020000
+#define RCC_AHBENR_IOPBEN	0x00040000
+#define RCC_AHBENR_IOPCEN	0x00080000
+#define RCC_AHBENR_IOPDEN	0x00100000
+#define RCC_AHBENR_IOPFEN	0x00400000
+
+#define RCC_APB2RSTR_SYSCFGRST	0x00000001
+#define RCC_APB2ENR_SYSCFGEN	0x00000001
+#else
+#define RCC_APB2RSTR_AFIORST	0x00000001
+#define RCC_APB2RSTR_IOPARST	0x00000004
+#define RCC_APB2RSTR_IOPBRST	0x00000008
+#define RCC_APB2RSTR_IOPCRST	0x00000010
+#define RCC_APB2RSTR_IOPDRST	0x00000020
+#define RCC_APB2RSTR_IOPERST	0x00000040
+#define RCC_APB2RSTR_IOPFRST	0x00000080
+#define RCC_APB2RSTR_IOPGRST	0x00000100
+
+#define RCC_APB2ENR_AFIOEN	0x00000001
+#define RCC_APB2ENR_IOPAEN	0x00000004
+#define RCC_APB2ENR_IOPBEN	0x00000008
+#define RCC_APB2ENR_IOPCEN	0x00000010
+#define RCC_APB2ENR_IOPDEN	0x00000020
+#define RCC_APB2ENR_IOPEEN	0x00000040
+#define RCC_APB2ENR_IOPFEN	0x00000080
+#define RCC_APB2ENR_IOPGEN	0x00000100
+#endif
+
+#if defined(MCU_STM32F0)
+struct SYSCFG {
+  volatile uint32_t CFGR1;
+  uint32_t dummy0;
+  volatile uint32_t EXTICR[4];
+  volatile uint32_t CFGR2;
+};
+#define SYSCFG_CFGR1_MEM_MODE 0x03
+
+#define SYSCFG_BASE	(APBPERIPH_BASE + 0x00010000)
+static struct SYSCFG *const SYSCFG = ((struct SYSCFG *const) SYSCFG_BASE);
+#endif
+
+struct FLASH {
+  volatile uint32_t ACR;
+  volatile uint32_t KEYR;
+  volatile uint32_t OPTKEYR;
+  volatile uint32_t SR;
+  volatile uint32_t CR;
+  volatile uint32_t AR;
+  volatile uint32_t RESERVED;
+  volatile uint32_t OBR;
+  volatile uint32_t WRPR;
+};
+
+#define FLASH_R_BASE	(AHBPERIPH_BASE + 0x2000)
+static struct FLASH *const FLASH = ((struct FLASH *const) FLASH_R_BASE);
+
+static void __attribute__((used))
+clock_init (void)
+{
+  /* HSI setup */
+  RCC->CR |= RCC_CR_HSION;
+  while (!(RCC->CR & RCC_CR_HSIRDY))
+    ;
+  /* Reset HSEON, HSEBYP, CSSON, and PLLON, not touching RCC_CR_HSITRIM */
+  RCC->CR &= (RCC_CR_HSITRIM | RCC_CR_HSION);
+  RCC->CFGR = 0;
+  while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
+    ;
+
+#if !defined(MCU_STM32F0)
+  /* HSE setup */
+  RCC->CR |= RCC_CR_HSEON;
+  while (!(RCC->CR & RCC_CR_HSERDY))
+    ;
+#endif
+
+  /* PLL setup */
+  RCC->CFGR |= STM32_PLLMUL | STM32_PLLXTPRE | STM32_PLLSRC;
+  RCC->CR   |= RCC_CR_PLLON;
+  while (!(RCC->CR & RCC_CR_PLLRDY))
+    ;
+
+  /* Clock settings */
+  RCC->CFGR = STM32_MCOSEL | STM32_USBPRE | STM32_PLLMUL | STM32_PLLXTPRE
+    | STM32_PLLSRC | STM32_ADCPRE | STM32_PPRE2 | STM32_PPRE1 | STM32_HPRE;
+
+  /*
+   * We don't touch RCC->CR2, RCC->CFGR2, RCC->CFGR3, and RCC->CIR.
+   */
+
+  /* Flash setup */
+  FLASH->ACR = STM32_FLASHBITS;
+
+  /* CRC */
+  RCC->AHBENR |= RCC_AHBENR_CRCEN;
+
+  /* Switching on the configured clock source. */
+  RCC->CFGR |= STM32_SW;
+  while ((RCC->CFGR & RCC_CFGR_SWS) != (STM32_SW << 2))
+    ;
+
+#if defined(MCU_STM32F0)
+  RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN;
+  RCC->APB2RSTR = RCC_APB2RSTR_SYSCFGRST;
+  RCC->APB2RSTR = 0;
+
+# if defined(HAVE_SYS_H)
+  /* Use vectors on RAM */
+  SYSCFG->CFGR1 = (SYSCFG->CFGR1 & ~SYSCFG_CFGR1_MEM_MODE) | 3;
+# endif
+#endif
+}
+
+
+#if defined(MCU_STM32F0)
+struct GPIO {
+  volatile uint32_t MODER;
+  volatile uint16_t OTYPER;
+  uint16_t dummy0;
+  volatile uint32_t OSPEEDR;
+  volatile uint32_t PUPDR;
+  volatile uint16_t IDR;
+  uint16_t dummy1;
+  volatile uint16_t ODR;
+  uint16_t dummy2;
+  volatile uint16_t BSRR;
+  uint16_t dummy3;
+  volatile uint32_t LCKR;
+  volatile uint32_t AFR[2];
+  volatile uint16_t BRR;
+  uint16_t dummy4;
+};
+
+#define GPIOA_BASE	(AHB2PERIPH_BASE + 0x0000)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOB_BASE	(AHB2PERIPH_BASE + 0x0400)
+#define GPIOB		((struct GPIO *) GPIOB_BASE)
+#define GPIOC_BASE	(AHB2PERIPH_BASE + 0x0800)
+#define GPIOC		((struct GPIO *) GPIOC_BASE)
+#define GPIOD_BASE	(AHB2PERIPH_BASE + 0x0C00)
+#define GPIOD		((struct GPIO *) GPIOD_BASE)
+#define GPIOF_BASE	(AHB2PERIPH_BASE + 0x1400)
+#define GPIOF		((struct GPIO *) GPIOF_BASE)
+#else
+struct AFIO
+{
+  volatile uint32_t EVCR;
+  volatile uint32_t MAPR;
+  volatile uint32_t EXTICR[4];
+  uint32_t RESERVED0;
+  volatile uint32_t MAPR2;
+};
+
+#define AFIO_BASE 0x40010000
+static struct AFIO *const AFIO = (struct AFIO *const)AFIO_BASE;
+
+#define AFIO_MAPR_TIM3_REMAP_PARTIALREMAP 0x00000800
+#define AFIO_MAPR_SWJ_CFG_DISABLE         0x04000000
+#define AFIO_MAPR_SWJ_CFG_JTAGDISABLE     0x02000000
+
+
+struct GPIO {
+  volatile uint32_t CRL;
+  volatile uint32_t CRH;
+  volatile uint32_t IDR;
+  volatile uint32_t ODR;
+  volatile uint32_t BSRR;
+  volatile uint32_t BRR;
+  volatile uint32_t LCKR;
+};
+
+#define GPIOA_BASE	(APB2PERIPH_BASE + 0x0800)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOB_BASE	(APB2PERIPH_BASE + 0x0C00)
+#define GPIOB		((struct GPIO *) GPIOB_BASE)
+#define GPIOC_BASE	(APB2PERIPH_BASE + 0x1000)
+#define GPIOC		((struct GPIO *) GPIOC_BASE)
+#define GPIOD_BASE	(APB2PERIPH_BASE + 0x1400)
+#define GPIOD		((struct GPIO *) GPIOD_BASE)
+#define GPIOE_BASE	(APB2PERIPH_BASE + 0x1800)
+#define GPIOE		((struct GPIO *) GPIOE_BASE)
+#endif
+
+static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
+#ifdef GPIO_USB_BASE
+static struct GPIO *const GPIO_USB = ((struct GPIO *const) GPIO_USB_BASE);
+#endif
+#ifdef GPIO_OTHER_BASE
+static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
+#endif
+
+static void __attribute__((used))
+gpio_init (void)
+{
+  /* Enable GPIO clock. */
+#if defined(MCU_STM32F0)
+  RCC->AHBENR |= RCC_ENR_IOP_EN;
+  RCC->AHBRSTR = RCC_RSTR_IOP_RST;
+  RCC->AHBRSTR = 0;
+#else
+  RCC->APB2ENR |= RCC_ENR_IOP_EN;
+  RCC->APB2RSTR = RCC_RSTR_IOP_RST;
+  RCC->APB2RSTR = 0;
+#endif
+
+#if defined(MCU_STM32F0)
+  GPIO_LED->OSPEEDR = VAL_GPIO_LED_OSPEEDR;
+  GPIO_LED->OTYPER  = VAL_GPIO_LED_OTYPER;
+  GPIO_LED->MODER   = VAL_GPIO_LED_MODER;
+  GPIO_LED->PUPDR   = VAL_GPIO_LED_PUPDR;
+
+#ifdef GPIO_OTHER_BASE
+  GPIO_OTHER->OSPEEDR = VAL_GPIO_OTHER_OSPEEDR;
+  GPIO_OTHER->OTYPER  = VAL_GPIO_OTHER_OTYPER;
+  GPIO_OTHER->MODER   = VAL_GPIO_OTHER_MODER;
+  GPIO_OTHER->PUPDR   = VAL_GPIO_OTHER_PUPDR;
+#endif
+#else
+#ifdef AFIO_MAPR_SOMETHING
+  AFIO->MAPR |= AFIO_MAPR_SOMETHING;
+#endif
+
+  /* LED is mandatory.  If it's on an independent port, we configure it.  */
+  GPIO_LED->ODR = VAL_GPIO_LED_ODR;
+  GPIO_LED->CRH = VAL_GPIO_LED_CRH;
+  GPIO_LED->CRL = VAL_GPIO_LED_CRL;
+
+  /* If there is USB enabler pin and it's independent, we configure it.  */
+#if defined(GPIO_USB_BASE) && GPIO_USB_BASE != GPIO_LED_BASE
+  GPIO_USB->ODR = VAL_GPIO_USB_ODR;
+  GPIO_USB->CRH = VAL_GPIO_USB_CRH;
+  GPIO_USB->CRL = VAL_GPIO_USB_CRL;
+#endif
+
+#ifdef GPIO_OTHER_BASE
+  GPIO_OTHER->ODR = VAL_GPIO_OTHER_ODR;
+  GPIO_OTHER->CRH = VAL_GPIO_OTHER_CRH;
+  GPIO_OTHER->CRL = VAL_GPIO_OTHER_CRL;
+#endif
+#endif
+}
--- a/doc/chopstx-api.texi
+++ b/doc/chopstx-api.texi
@@ -7,6 +7,16 @@ When it detects a coding error, this function will be called to
 stop further execution of code.  It never returns.
@end deftypefun

+@subheading chopstx_main_init
+@anchor{chopstx_main_init}
+@deftypefun {void} {chopstx_main_init} (chopstx_prio_t @var{prio})
+@var{prio}: priority
+
+Initialize main thread with @var{prio}.
+The thread main is created with priority CHX_PRIO_MAIN_INIT,
+and it runs with that priority until this routine will is called.
+@end deftypefun
+
@subheading chopstx_create
@anchor{chopstx_create}
@deftypefun {chopstx_t} {chopstx_create} (uint32_t @var{flags_and_prio}, uint32_t @var{stack_addr}, size_t @var{stack_size}, voidfunc @var{thread_entry}, void * @var{arg})
@@ -20,7 +30,7 @@ stop further execution of code.  It never returns.

@var{arg}: Argument to the thread entry function

-Create a thread.
+Create a thread.  Returns thread ID.
@end deftypefun

@subheading chopstx_usec_wait_var
@@ -28,8 +38,8 @@ Create a thread.
@deftypefun {void} {chopstx_usec_wait_var} (uint32_t * @var{var})
@var{var}: Pointer to usec

-Sleep for micro second specified by @var{var}.
-Another thread can clear @var{var} on condition (to avoid this thread going into sleep).
+Sleep for micro seconds, specified by @var{var}.
+Another thread can clear @var{var} to stop the caller going into sleep.
@end deftypefun

@subheading chopstx_usec_wait
@@ -95,7 +105,7 @@ Wake up a thread waiting on @var{cond}.
@deftypefun {void} {chopstx_cond_broadcast} (chopstx_cond_t * @var{cond})
@var{cond}: Condition Variable

-Wake up all thread winting on @var{cond}.
+Wake up all threads waiting on @var{cond}.
@end deftypefun

@subheading chopstx_claim_irq
@@ -167,7 +177,7 @@ Waits for the thread of @var{thd} to terminate.
@deftypefun {void} {chopstx_wakeup_usec_wait} (chopstx_t @var{thd})
@var{thd}: Thread to be awakened

-Canceling the timer, wakup the sleeping thread for it.
+Canceling the timer, wake up the sleeping thread.
 No return value.
@end deftypefun

@@ -176,7 +186,7 @@ No return value.
@deftypefun {void} {chopstx_cancel} (chopstx_t @var{thd})
@var{thd}: Thread to be canceled

-This function requests a cancellation th the thread @var{thd}.
+This function requests a cancellation of a thread @var{thd}.
 No return value.
@end deftypefun

@@ -189,3 +199,13 @@ No return value.  If the thread is canceled, this function
 does not return.
@end deftypefun

+@subheading chopstx_setcancelstate
+@anchor{chopstx_setcancelstate}
+@deftypefun {int} {chopstx_setcancelstate} (int @var{cancel_disable})
+@var{cancel_disable}: 0 to enable cancelation, otherwise disabled.
+
+Calling chopstx_setcancelstate sets cancelability state.
+
+Returns old state which is 0 when it was enabled.
+@end deftypefun
+
--- a/doc/chopstx.texi
+++ b/doc/chopstx.texi
@@ -1,7 +1,7 @@
 \input texinfo                      @c -*-texinfo-*-
@c %**start of header
@setfilename chopstx.info
-@set VERSION 0.03
+@set VERSION 0.10
@settitle Chopstx Reference Manual
@c Unify some of the indices.
@syncodeindex tp fn
@@ -11,7 +11,7 @@
 This manual is for Chopstx (version @value{VERSION}).

@noindent
-Copyright @copyright{} 2013 Flying Stone Technology @*
+Copyright @copyright{} 2013, 2015 Flying Stone Technology @*

@quotation
 Permission is granted to copy, distribute and/or modify this document
@@ -83,8 +83,8 @@ Indexes
@node Introduction
@chapter Introduction

-Chopstx is an RT thread library for ARM Cortex-M3, specifically,
-STM32F103.
+Chopstx is an RT thread library for ARM Cortex-M0 and Cortex-M3.
+Specifically, it is used for STM32F030 and STM32F103.

 While most RTOSes come with many features, drivers, and stacks,
 Chopstx just offers a RT thread library.
--- a/entry.c
+++ b/entry.c
@@ -1,7 +1,7 @@
 /*
 * entry.c - Entry routine when reset and interrupt vectors.
 *
- * Copyright (C) 2013 Flying Stone Technology
+ * Copyright (C) 2013, 2014, 2015  Flying Stone Technology
 * Author: NIIBE Yutaka <gniibe@fsij.org>
 *
 * This file is a part of Chopstx, a thread library for embedded.
@@ -33,221 +33,25 @@
 #ifdef HAVE_SYS_H
 #define INLINE __attribute__ ((used))
 #include "sys.h"
+#include "board.h"
+#undef STM32F10X_MD		/* Prepare for high density device, too.  */
 #else
 #include "board.h"
-
-#define STM32_SW_PLL		(2 << 0)
-#define STM32_PLLSRC_HSE	(1 << 16)
-
-#define STM32_PLLXTPRE_DIV1	(0 << 17)
-#define STM32_PLLXTPRE_DIV2	(1 << 17)
-
-#define STM32_HPRE_DIV1		(0 << 4)
-
-#define STM32_PPRE1_DIV2	(4 << 8)
-
-#define STM32_PPRE2_DIV1        (0 << 11)
-#define STM32_PPRE2_DIV2	(4 << 11)
-
-#define STM32_ADCPRE_DIV4	(1 << 14)
-#define STM32_ADCPRE_DIV6       (2 << 14)
-
-#define STM32_USBPRE_DIV1P5     (0 << 22)
-
-#define STM32_MCO_NOCLOCK	(0 << 24)
-
-#define STM32_SW		STM32_SW_PLL
-#define STM32_PLLSRC		STM32_PLLSRC_HSE
-#define STM32_HPRE		STM32_HPRE_DIV1
-#define STM32_PPRE1		STM32_PPRE1_DIV2
-#define STM32_PPRE2		STM32_PPRE2_DIV1
-#define STM32_ADCPRE		STM32_ADCPRE_DIV6
-#define STM32_MCOSEL		STM32_MCO_NOCLOCK
-#define STM32_USBPRE            STM32_USBPRE_DIV1P5
-
-#define STM32_PLLCLKIN		(STM32_HSECLK / 1)
-#define STM32_PLLMUL		((STM32_PLLMUL_VALUE - 2) << 18)
-#define STM32_PLLCLKOUT		(STM32_PLLCLKIN * STM32_PLLMUL_VALUE)
-#define STM32_SYSCLK		STM32_PLLCLKOUT
-#define STM32_HCLK		(STM32_SYSCLK / 1)
-
-#define STM32_FLASHBITS		0x00000012
-
-#define PERIPH_BASE	0x40000000
-#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
-#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
-
-struct RCC {
-  volatile uint32_t CR;
-  volatile uint32_t CFGR;
-  volatile uint32_t CIR;
-  volatile uint32_t APB2RSTR;
-  volatile uint32_t APB1RSTR;
-  volatile uint32_t AHBENR;
-  volatile uint32_t APB2ENR;
-  volatile uint32_t APB1ENR;
-  volatile uint32_t BDCR;
-  volatile uint32_t CSR;
-};
-
-#define RCC_BASE		(AHBPERIPH_BASE + 0x1000)
-static struct RCC *const RCC = ((struct RCC *const)RCC_BASE);
-
-#define RCC_APB1ENR_USBEN	0x00800000
-#define RCC_APB1RSTR_USBRST	0x00800000
-
-#define RCC_CR_HSION		0x00000001
-#define RCC_CR_HSIRDY		0x00000002
-#define RCC_CR_HSITRIM		0x000000F8
-#define RCC_CR_HSEON		0x00010000
-#define RCC_CR_HSERDY		0x00020000
-#define RCC_CR_PLLON		0x01000000
-#define RCC_CR_PLLRDY		0x02000000
-
-#define RCC_CFGR_SWS		0x0000000C
-#define RCC_CFGR_SWS_HSI	0x00000000
-
-#define RCC_AHBENR_CRCEN        0x0040
-
-struct FLASH {
-  volatile uint32_t ACR;
-  volatile uint32_t KEYR;
-  volatile uint32_t OPTKEYR;
-  volatile uint32_t SR;
-  volatile uint32_t CR;
-  volatile uint32_t AR;
-  volatile uint32_t RESERVED;
-  volatile uint32_t OBR;
-  volatile uint32_t WRPR;
-};
-
-#define FLASH_R_BASE	(AHBPERIPH_BASE + 0x2000)
-static struct FLASH *const FLASH = ((struct FLASH *const) FLASH_R_BASE);
-
-static void __attribute__((used))
-clock_init (void)
-{
-  /* HSI setup */
-  RCC->CR |= RCC_CR_HSION;
-  while (!(RCC->CR & RCC_CR_HSIRDY))
-    ;
-  RCC->CR &= RCC_CR_HSITRIM | RCC_CR_HSION;
-  RCC->CFGR = 0;
-  while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
-    ;
-
-  /* HSE setup */
-  RCC->CR |= RCC_CR_HSEON;
-  while (!(RCC->CR & RCC_CR_HSERDY))
-    ;
-
-  /* PLL setup */
-  RCC->CFGR |= STM32_PLLMUL | STM32_PLLXTPRE | STM32_PLLSRC;
-  RCC->CR   |= RCC_CR_PLLON;
-  while (!(RCC->CR & RCC_CR_PLLRDY))
-    ;
-
-  /* Clock settings */
-  RCC->CFGR = STM32_MCOSEL | STM32_USBPRE | STM32_PLLMUL | STM32_PLLXTPRE
-    | STM32_PLLSRC | STM32_ADCPRE | STM32_PPRE2 | STM32_PPRE1 | STM32_HPRE;
-
-  /* Flash setup */
-  FLASH->ACR = STM32_FLASHBITS;
-
-  /* CRC */
-  RCC->AHBENR |= RCC_AHBENR_CRCEN;
-
-  /* Switching on the configured clock source. */
-  RCC->CFGR |= STM32_SW;
-  while ((RCC->CFGR & RCC_CFGR_SWS) != (STM32_SW << 2))
-    ;
-}
-
-#define RCC_APB2RSTR_AFIORST	0x00000001
-#define RCC_APB2RSTR_IOPARST	0x00000004
-#define RCC_APB2RSTR_IOPBRST	0x00000008
-#define RCC_APB2RSTR_IOPCRST	0x00000010
-#define RCC_APB2RSTR_IOPDRST	0x00000020
-
-#define RCC_APB2ENR_AFIOEN	0x00000001
-#define RCC_APB2ENR_IOPAEN	0x00000004
-#define RCC_APB2ENR_IOPBEN	0x00000008
-#define RCC_APB2ENR_IOPCEN	0x00000010
-#define RCC_APB2ENR_IOPDEN	0x00000020
-
-
-struct AFIO
-{
-  volatile uint32_t EVCR;
-  volatile uint32_t MAPR;
-  volatile uint32_t EXTICR[4];
-  uint32_t RESERVED0;
-  volatile uint32_t MAPR2;
-};
-
-#define AFIO_BASE 0x40010000
-static struct AFIO *const AFIO = (struct AFIO *const)AFIO_BASE;
-
-#define AFIO_MAPR_TIM3_REMAP_PARTIALREMAP 0x00000800
-
-
-struct GPIO {
-  volatile uint32_t CRL;
-  volatile uint32_t CRH;
-  volatile uint32_t IDR;
-  volatile uint32_t ODR;
-  volatile uint32_t BSRR;
-  volatile uint32_t BRR;
-  volatile uint32_t LCKR;
-};
-
-#define GPIOA_BASE	(APB2PERIPH_BASE + 0x0800)
-#define GPIOA		((struct GPIO *) GPIOA_BASE)
-#define GPIOB_BASE	(APB2PERIPH_BASE + 0x0C00)
-#define GPIOB		((struct GPIO *) GPIOB_BASE)
-#define GPIOC_BASE	(APB2PERIPH_BASE + 0x1000)
-#define GPIOC		((struct GPIO *) GPIOC_BASE)
-#define GPIOD_BASE	(APB2PERIPH_BASE + 0x1400)
-#define GPIOD		((struct GPIO *) GPIOD_BASE)
-#define GPIOE_BASE	(APB2PERIPH_BASE + 0x1800)
-#define GPIOE		((struct GPIO *) GPIOE_BASE)
-
-static struct GPIO *const GPIO_USB = ((struct GPIO *const) GPIO_USB_BASE);
-static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
-#ifdef GPIO_OTHER_BASE
-static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
+#include "clk_gpio_init.c"
 #endif

-static void __attribute__((used))
-gpio_init (void)
-{
-  /* Enable GPIO clock. */
-  RCC->APB2ENR |= RCC_APB2ENR_IOP_EN;
-  RCC->APB2RSTR = RCC_APB2RSTR_IOP_RST;
-  RCC->APB2RSTR = 0;

-#ifdef AFIO_MAPR_SOMETHING
-  AFIO->MAPR |= AFIO_MAPR_SOMETHING;
-#endif
-
-  GPIO_USB->ODR = VAL_GPIO_ODR;
-  GPIO_USB->CRH = VAL_GPIO_CRH;
-  GPIO_USB->CRL = VAL_GPIO_CRL;
-
-#if GPIO_USB_BASE != GPIO_LED_BASE
-  GPIO_LED->ODR = VAL_GPIO_LED_ODR;
-  GPIO_LED->CRH = VAL_GPIO_LED_CRH;
-  GPIO_LED->CRL = VAL_GPIO_LED_CRL;
-#endif
-
-#ifdef GPIO_OTHER_BASE
-  GPIO_OTHER->ODR = VAL_GPIO_OTHER_ODR;
-  GPIO_OTHER->CRH = VAL_GPIO_OTHER_CRH;
-  GPIO_OTHER->CRL = VAL_GPIO_OTHER_CRL;
-#endif
-}
+#ifdef MAKE_ENTRY_PUBLIC
+#define STATIC_ENTRY
+#else
+#define STATIC_ENTRY static
 #endif

+extern uint8_t __main_stack_end__;
+extern void svc (void);
+extern void preempt (void);
+extern void chx_timer_expired (void);
+extern void chx_handle_intr (void);

 static void nmi (void)
 {
@@ -256,7 +60,18 @@ static void nmi (void)

 static void hard_fault (void)
 {
+#if defined(__ARM_ARCH_6M__)
+  register uint32_t primask;
+
+  asm ("mrs	%0, PRIMASK" : "=r" (primask));
+
+  if (primask)
+    asm volatile ("b	svc");
+  else
    for (;;);
+#else
+  for (;;);
+#endif
 }

 static void mem_manage (void)
@@ -281,10 +96,15 @@ static void none (void)
 #define C_S_SUB(arg0, arg1, arg2) arg0 #arg1 arg2
 #define COMPOSE_STATEMENT(arg0,arg1,arg2)  C_S_SUB (arg0, arg1, arg2)

+#if defined(__ARM_ARCH_6M__)
+__attribute__ ((used,section(".bss.startup.0")))
+uint32_t vectors_in_ram[48];
+#endif
+
 /*
 * This routine only changes PSP and not MSP.
 */
-static __attribute__ ((naked,section(".text.startup.0")))
+STATIC_ENTRY __attribute__ ((naked,section(".text.startup.0")))
 void entry (void)
 {
  asm volatile ("bl	clock_init\n\t"
@@ -295,7 +115,12 @@ void entry (void)
 	"0:\n\t"
 		"cmp	r1, r2\n\t"
 		"beq	1f\n\t"
+#if defined(__ARM_ARCH_6M__)
+		"str	r0, [r1]\n\t"
+		"add	r1, #4\n\t"
+#else
 		"str	r0, [r1], #4\n\t"
+#endif
 		"b	0b\n"
 	"1:\n\t"
 		/* Copy data section.  */
@@ -305,8 +130,15 @@ void entry (void)
 	"2:\n\t"
 		"cmp	r1, r2\n\t"
 		"beq	3f\n\t"
+#if defined(__ARM_ARCH_6M__)
+		"ldr	r0, [r3]\n\t"
+		"str	r0, [r1]\n\t"
+		"add	r3, #4\n\t"
+		"add	r1, #4\n\t"
+#else
 		"ldr	r0, [r3], #4\n\t"
 		"str	r0, [r1], #4\n\t"
+#endif
 		"b	2b\n"
 	"3:\n\t"
 		/* Switch to PSP.  */
@@ -320,8 +152,10 @@ void entry (void)
 		"bl	chx_systick_init\n\t"
 		"bl	gpio_init\n\t"
 		/* Enable interrupts.  */
+#if defined(__ARM_ARCH_7M__)
 		"mov	r0, #0\n\t"
 		"msr	BASEPRI, r0\n\t"
+#endif
 		"cpsie	i\n\t"
 		/* Call main.  */
 		"mov	r1, r0\n\t"
@@ -333,12 +167,6 @@ void entry (void)


 typedef void (*handler)(void);
-extern uint8_t __main_stack_end__;
-
-extern void svc (void);
-extern void preempt (void);
-extern void chx_timer_expired (void);
-extern void chx_handle_intr (void);

 handler vector_table[] __attribute__ ((section(".startup.vectors"))) = {
  (handler)&__main_stack_end__,
@@ -371,12 +199,25 @@ handler vector_table[] __attribute__ ((section(".startup.vectors"))) = {
  chx_handle_intr /* DMA1 CH6 */, chx_handle_intr /* DMA1 CH7 */,
  chx_handle_intr /* ADC1_2 */,   chx_handle_intr /* USB HP */,
  /* 0x90 */
-  chx_handle_intr,		/* USB LP */
-  /* ... and more.  CAN, EXT9_5, TIMx, I2C, SPI, USART, EXT15_10 */
-  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
-  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
-  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
-  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
-  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr /* USB LP */,   chx_handle_intr /* CAN */,
+  /* ... and more.  EXT9_5, TIMx, I2C, SPI, USART, EXT15_10 */
  chx_handle_intr,                chx_handle_intr,
+  /* 0xA0 */
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  /* 0xc0 */
+#if !defined(__ARM_ARCH_6M__)
+  /* STM32F0 doesn't have more.  */
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+#endif
+#if !defined(STM32F10X_MD)
+  /* High-density chips have more; RTCAlarm, USBWakeup, ... , DMA2_Channel4_5 */
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+#endif
 };
--- a/example-cdc/board.h
+++ b/example-cdc/board.h
@@ -0,0 +1 @@
+../board/board-fst-01.h
--- a/example-cdc/sample.ld
+++ b/example-cdc/sample.ld
@@ -14,9 +14,6 @@ MEMORY
    ram : org = 0x20000000, len = 20k
 }

-__flash_start__ = 0x08001000;
-__flash_end__   = 0x08020000;
-
 __ram_start__           = ORIGIN(ram);
 __ram_size__            = 20k;
 __ram_end__             = __ram_start__ + __ram_size__;
@@ -25,12 +22,14 @@ SECTIONS
 {
    . = 0;

-    .sys : ALIGN(16) SUBALIGN(16)
+    .sys : ALIGN(4) SUBALIGN(4)
    {
 	_sys = .;
 	KEEP(*(.vectors))
 	. = ALIGN(16);
-	*(.sys.version)
+	KEEP(*(.sys.version))
+	KEEP(*(.sys.board_id))
+	KEEP(*(.sys.board_name))
 	build/sys.o(.text)
 	build/sys.o(.text.*)
 	build/sys.o(.rodata)
@@ -59,6 +58,7 @@ SECTIONS
        *(.glue_7t)
        *(.glue_7)
        *(.gcc*)
+	. = ALIGN(8);
    } > flash

    .ARM.extab : {*(.ARM.extab* .gnu.linkonce.armextab.*)} > flash
--- a/example-cdc/sys.c
+++ b/example-cdc/sys.c
@@ -1,7 +1,7 @@
 /*
 * sys.c - system routines for the initial page for STM32F103.
 *
- * Copyright (C) 2013 Flying Stone Technology
+ * Copyright (C) 2013, 2014, 2015 Flying Stone Technology
 * Author: NIIBE Yutaka <gniibe@fsij.org>
 *
 * Copying and distribution of this file, with or without modification,
@@ -17,50 +17,13 @@
 #include <stdlib.h>
 #include "board.h"

+#include "clk_gpio_init.c"

 #define CORTEX_PRIORITY_BITS    4
 #define CORTEX_PRIORITY_MASK(n)  ((n) << (8 - CORTEX_PRIORITY_BITS))
 #define USB_LP_CAN1_RX0_IRQn	 20
 #define STM32_USB_IRQ_PRIORITY   11

-
-#define STM32_SW_PLL		(2 << 0)
-#define STM32_PLLSRC_HSE	(1 << 16)
-
-#define STM32_PLLXTPRE_DIV1	(0 << 17)
-#define STM32_PLLXTPRE_DIV2	(1 << 17)
-
-#define STM32_HPRE_DIV1		(0 << 4)
-
-#define STM32_PPRE1_DIV2	(4 << 8)
-
-#define STM32_PPRE2_DIV1        (0 << 11)
-#define STM32_PPRE2_DIV2	(4 << 11)
-
-#define STM32_ADCPRE_DIV4	(1 << 14)
-#define STM32_ADCPRE_DIV6       (2 << 14)
-
-#define STM32_USBPRE_DIV1P5     (0 << 22)
-
-#define STM32_MCO_NOCLOCK	(0 << 24)
-
-#define STM32_SW		STM32_SW_PLL
-#define STM32_PLLSRC		STM32_PLLSRC_HSE
-#define STM32_HPRE		STM32_HPRE_DIV1
-#define STM32_PPRE1		STM32_PPRE1_DIV2
-#define STM32_PPRE2		STM32_PPRE2_DIV1
-#define STM32_ADCPRE		STM32_ADCPRE_DIV6
-#define STM32_MCOSEL		STM32_MCO_NOCLOCK
-#define STM32_USBPRE            STM32_USBPRE_DIV1P5
-
-#define STM32_PLLCLKIN		(STM32_HSECLK / 1)
-#define STM32_PLLMUL		((STM32_PLLMUL_VALUE - 2) << 18)
-#define STM32_PLLCLKOUT		(STM32_PLLCLKIN * STM32_PLLMUL_VALUE)
-#define STM32_SYSCLK		STM32_PLLCLKOUT
-#define STM32_HCLK		(STM32_SYSCLK / 1)
-
-#define STM32_FLASHBITS		0x00000012
-
 struct NVIC {
  uint32_t ISER[8];
  uint32_t unused1[24];
@@ -90,181 +53,6 @@ nvic_enable_vector (uint32_t n, uint32_t prio)
  NVIC_ISER (n) = 1 << (n & 0x1F);
 }

-
-#define PERIPH_BASE	0x40000000
-#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
-#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
-
-struct RCC {
-  volatile uint32_t CR;
-  volatile uint32_t CFGR;
-  volatile uint32_t CIR;
-  volatile uint32_t APB2RSTR;
-  volatile uint32_t APB1RSTR;
-  volatile uint32_t AHBENR;
-  volatile uint32_t APB2ENR;
-  volatile uint32_t APB1ENR;
-  volatile uint32_t BDCR;
-  volatile uint32_t CSR;
-};
-
-#define RCC_BASE		(AHBPERIPH_BASE + 0x1000)
-static struct RCC *const RCC = ((struct RCC *const)RCC_BASE);
-
-#define RCC_APB1ENR_USBEN	0x00800000
-#define RCC_APB1RSTR_USBRST	0x00800000
-
-#define RCC_CR_HSION		0x00000001
-#define RCC_CR_HSIRDY		0x00000002
-#define RCC_CR_HSITRIM		0x000000F8
-#define RCC_CR_HSEON		0x00010000
-#define RCC_CR_HSERDY		0x00020000
-#define RCC_CR_PLLON		0x01000000
-#define RCC_CR_PLLRDY		0x02000000
-
-#define RCC_CFGR_SWS		0x0000000C
-#define RCC_CFGR_SWS_HSI	0x00000000
-
-#define RCC_AHBENR_CRCEN        0x0040
-
-struct FLASH {
-  volatile uint32_t ACR;
-  volatile uint32_t KEYR;
-  volatile uint32_t OPTKEYR;
-  volatile uint32_t SR;
-  volatile uint32_t CR;
-  volatile uint32_t AR;
-  volatile uint32_t RESERVED;
-  volatile uint32_t OBR;
-  volatile uint32_t WRPR;
-};
-
-#define FLASH_R_BASE	(AHBPERIPH_BASE + 0x2000)
-static struct FLASH *const FLASH = ((struct FLASH *const) FLASH_R_BASE);
-
-static void
-clock_init (void)
-{
-  /* HSI setup */
-  RCC->CR |= RCC_CR_HSION;
-  while (!(RCC->CR & RCC_CR_HSIRDY))
-    ;
-  RCC->CR &= RCC_CR_HSITRIM | RCC_CR_HSION;
-  RCC->CFGR = 0;
-  while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
-    ;
-
-  /* HSE setup */
-  RCC->CR |= RCC_CR_HSEON;
-  while (!(RCC->CR & RCC_CR_HSERDY))
-    ;
-
-  /* PLL setup */
-  RCC->CFGR |= STM32_PLLMUL | STM32_PLLXTPRE | STM32_PLLSRC;
-  RCC->CR   |= RCC_CR_PLLON;
-  while (!(RCC->CR & RCC_CR_PLLRDY))
-    ;
-
-  /* Clock settings */
-  RCC->CFGR = STM32_MCOSEL | STM32_USBPRE | STM32_PLLMUL | STM32_PLLXTPRE
-    | STM32_PLLSRC | STM32_ADCPRE | STM32_PPRE2 | STM32_PPRE1 | STM32_HPRE;
-
-  /* Flash setup */
-  FLASH->ACR = STM32_FLASHBITS;
-
-  /* CRC */
-  RCC->AHBENR |= RCC_AHBENR_CRCEN;
-
-  /* Switching on the configured clock source. */
-  RCC->CFGR |= STM32_SW;
-  while ((RCC->CFGR & RCC_CFGR_SWS) != (STM32_SW << 2))
-    ;
-}
-
-#define RCC_APB2RSTR_AFIORST    0x00000001
-#define RCC_APB2RSTR_IOPARST	0x00000004
-#define RCC_APB2RSTR_IOPBRST	0x00000008
-#define RCC_APB2RSTR_IOPCRST	0x00000010
-#define RCC_APB2RSTR_IOPDRST	0x00000020
-
-#define RCC_APB2ENR_AFIOEN      0x00000001
-#define RCC_APB2ENR_IOPAEN	0x00000004
-#define RCC_APB2ENR_IOPBEN	0x00000008
-#define RCC_APB2ENR_IOPCEN	0x00000010
-#define RCC_APB2ENR_IOPDEN	0x00000020
-
-
-struct AFIO
-{
-  volatile uint32_t EVCR;
-  volatile uint32_t MAPR;
-  volatile uint32_t EXTICR[4];
-  uint32_t RESERVED0;
-  volatile uint32_t MAPR2;
-};
-
-#define AFIO_BASE 0x40010000
-static struct AFIO *const AFIO = (struct AFIO *const)AFIO_BASE;
-
-#define AFIO_MAPR_TIM3_REMAP_PARTIALREMAP 0x00000800
-
-
-struct GPIO {
-  volatile uint32_t CRL;
-  volatile uint32_t CRH;
-  volatile uint32_t IDR;
-  volatile uint32_t ODR;
-  volatile uint32_t BSRR;
-  volatile uint32_t BRR;
-  volatile uint32_t LCKR;
-};
-
-#define GPIOA_BASE	(APB2PERIPH_BASE + 0x0800)
-#define GPIOA		((struct GPIO *) GPIOA_BASE)
-#define GPIOB_BASE	(APB2PERIPH_BASE + 0x0C00)
-#define GPIOB		((struct GPIO *) GPIOB_BASE)
-#define GPIOC_BASE	(APB2PERIPH_BASE + 0x1000)
-#define GPIOC		((struct GPIO *) GPIOC_BASE)
-#define GPIOD_BASE	(APB2PERIPH_BASE + 0x1400)
-#define GPIOD		((struct GPIO *) GPIOD_BASE)
-#define GPIOE_BASE	(APB2PERIPH_BASE + 0x1800)
-#define GPIOE		((struct GPIO *) GPIOE_BASE)
-
-static struct GPIO *const GPIO_USB = ((struct GPIO *const) GPIO_USB_BASE);
-static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
-#ifdef GPIO_OTHER_BASE
-static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
-#endif
-
-static void
-gpio_init (void)
-{
-  /* Enable GPIO clock. */
-  RCC->APB2ENR |= RCC_APB2ENR_IOP_EN;
-  RCC->APB2RSTR = RCC_APB2RSTR_IOP_RST;
-  RCC->APB2RSTR = 0;
-
-#ifdef AFIO_MAPR_SOMETHING
-  AFIO->MAPR |= AFIO_MAPR_SOMETHING;
-#endif
-
-  GPIO_USB->ODR = VAL_GPIO_ODR;
-  GPIO_USB->CRH = VAL_GPIO_CRH;
-  GPIO_USB->CRL = VAL_GPIO_CRL;
-
-#if GPIO_USB_BASE != GPIO_LED_BASE
-  GPIO_LED->ODR = VAL_GPIO_LED_ODR;
-  GPIO_LED->CRH = VAL_GPIO_LED_CRH;
-  GPIO_LED->CRL = VAL_GPIO_LED_CRL;
-#endif
-
-#ifdef GPIO_OTHER_BASE
-  GPIO_OTHER->ODR = VAL_GPIO_OTHER_ODR;
-  GPIO_OTHER->CRH = VAL_GPIO_OTHER_CRH;
-  GPIO_OTHER->CRL = VAL_GPIO_OTHER_CRL;
-#endif
-}
-
 static void
 usb_cable_config (int enable)
 {
@@ -455,16 +243,19 @@ flash_check_blank (const uint8_t *p_start, size_t size)
  return 1;
 }

-extern uint8_t __flash_start__, __flash_end__;
+#define FLASH_START_ADDR 0x08000000 /* Fixed for all STM32F1.  */
+#define FLASH_OFFSET     0x1000     /* First pages are not-writable.  */
+#define FLASH_START      (FLASH_START_ADDR+FLASH_OFFSET)
+#define CHIP_ID_REG      ((uint32_t *)0xe0042000)
+#define FLASH_SIZE_REG   ((uint16_t *)0x1ffff7e0)

 static int
 flash_write (uint32_t dst_addr, const uint8_t *src, size_t len)
 {
  int status;
-  uint32_t flash_start = (uint32_t)&__flash_start__;
-  uint32_t flash_end = (uint32_t)&__flash_end__;
+  uint32_t flash_end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024;

-  if (dst_addr < flash_start || dst_addr + len > flash_end)
+  if (dst_addr < FLASH_START || dst_addr + len > flash_end)
    return 0;

  while (len)
@@ -517,17 +308,21 @@ flash_protect (void)
 static void __attribute__((naked))
 flash_erase_all_and_exec (void (*entry)(void))
 {
-  uint32_t addr = (uint32_t)&__flash_start__;
-  uint32_t end = (uint32_t)&__flash_end__;
+  uint32_t addr = FLASH_START;
+  uint32_t end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024;
+  uint32_t page_size = 1024;
  int r;

+  if (((*CHIP_ID_REG) & 0xfff) == 0x0414)
+    page_size = 2048;
+
  while (addr < end)
    {
      r = flash_erase_page (addr);
      if (r != 0)
 	break;

-      addr += FLASH_PAGE_SIZE;
+      addr += page_size;
    }

  if (addr >= end)
@@ -577,9 +372,12 @@ reset (void)
 {
  extern const unsigned long *FT0, *FT1, *FT2;

+  /*
+   * This code may not be at the start of flash ROM, because of DFU.
+   * So, we take the address from PC.
+   */
  asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
-		"mov.w	r0, #0xed00\n\t" /* r0 = SCR */
-		"movt	r0, #0xe000\n\t"
+		"ldr	r0, 1f\n\t"     /* r0 = SCR */
 		"mov	r1, pc\n\t"	/* r1 = (PC + 0x1000) & ~0x0fff */
 		"mov	r2, #0x1000\n\t"
 		"add	r1, r1, r2\n\t"
@@ -589,7 +387,9 @@ reset (void)
 		"ldr	r0, [r1], #4\n\t"
 		"msr	MSP, r0\n\t"	/* Main (exception handler) stack. */
 		"ldr	r0, [r1]\n\t"	/* Reset handler.                  */
-		"bx	r0\n"
+		"bx	r0\n\t"
+		".align	2\n"
+	"1:	.word	0xe000ed00"
 		: /* no output */ : /* no input */ : "memory");

  /* Never reach here. */
@@ -623,6 +423,12 @@ handler vector[] __attribute__ ((section(".vectors"))) = {
 const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = {
  3*2+2,	     /* bLength */
  0x03,		     /* bDescriptorType = USB_STRING_DESCRIPTOR_TYPE */
-  /* sys version: "2.0" */
-  '2', 0, '.', 0, '0', 0,
+  /* sys version: "2.1" */
+  '2', 0, '.', 0, '1', 0,
 };
+
+const uint32_t __attribute__((section(".sys.board_id")))
+sys_board_id = BOARD_ID;
+
+const uint8_t __attribute__((section(".sys.board_name")))
+sys_board_name[] = BOARD_NAME;
--- a/example-cdc/sys.h
+++ b/example-cdc/sys.h
@@ -1,4 +1,19 @@
+#define BOARD_ID_CQ_STARM          0xc5480875
+#define BOARD_ID_FST_01_00         0x613870a9
+#define BOARD_ID_FST_01            0x696886af
+#define BOARD_ID_MAPLE_MINI        0x7a445272
+#define BOARD_ID_OLIMEX_STM32_H103 0xf92bb594
+#define BOARD_ID_STBEE_MINI        0x1f341961
+#define BOARD_ID_STBEE             0x945c37e8
+#define BOARD_ID_STM32_PRIMER2     0x21e5798d
+#define BOARD_ID_STM8S_DISCOVERY   0x2f0976bb
+#define BOARD_ID_ST_DONGLE         0x2cd4e471
+#define BOARD_ID_ST_NUCLEO_F103    0x9b87c16d
+#define BOARD_ID_NITROKEY_START    0xad1e7ebd
+
 extern const uint8_t sys_version[8];
+extern const uint32_t sys_board_id;
+extern const uint8_t sys_board_name[];

 typedef void (*handler)(void);
 extern handler vector[16];
--- a/example-cdc/usb-cdc.c
+++ b/example-cdc/usb-cdc.c
@@ -36,7 +36,7 @@ static const uint8_t vcom_device_desc[18] = {
 };

 /* Configuration Descriptor tree for a CDC.*/
-static const uint8_t vcom_configuration_desc[67] = {
+static const uint8_t vcom_config_desc[67] = {
  9,
  USB_CONFIGURATION_DESCRIPTOR_TYPE, /* bDescriptorType: Configuration */
  /* Configuration Descriptor.*/
@@ -167,28 +167,34 @@ usb_cb_device_reset (void)
  usb_lld_set_configuration (0);

  /* Current Feature initialization */
-  usb_lld_set_feature (vcom_configuration_desc[7]);
+  usb_lld_set_feature (vcom_config_desc[7]);

  usb_lld_reset ();

  /* Initialize Endpoint 0 */
  usb_lld_setup_endpoint (ENDP0, EP_CONTROL, 0, ENDP0_RXADDR, ENDP0_TXADDR, 64);
+
+  chopstx_mutex_lock (&usb_mtx);
+  connected = 0;
+  bDeviceState = ATTACHED;
+  chopstx_cond_signal (&cnd_usb);
+  chopstx_mutex_unlock (&usb_mtx);
 }


+#define CDC_CTRL_DTR            0x0001
+
 void
-usb_cb_ctrl_write_finish (uint8_t req, uint8_t req_no, uint16_t value,
-			  uint16_t index, uint16_t len)
+usb_cb_ctrl_write_finish (uint8_t req, uint8_t req_no, uint16_t value)
 {
  uint8_t type_rcp = req & (REQUEST_TYPE|RECIPIENT);

  if (type_rcp == (CLASS_REQUEST | INTERFACE_RECIPIENT)
-      && index == 0 && USB_SETUP_SET (req) && len == 0
-      && req_no == USB_CDC_REQ_SET_CONTROL_LINE_STATE)
+      && USB_SETUP_SET (req) && req_no == USB_CDC_REQ_SET_CONTROL_LINE_STATE)
    {
      /* Open/close the connection.  */
      chopstx_mutex_lock (&usb_mtx);
-      connected = (value != 0)? 1 : 0;
+      connected = ((value & CDC_CTRL_DTR) != 0)? 1 : 0;
      chopstx_cond_signal (&cnd_usb);
      chopstx_mutex_unlock (&usb_mtx);
    }
@@ -211,22 +217,17 @@ static struct line_coding line_coding = {


 static int
-vcom_port_data_setup (uint8_t req, uint8_t req_no, uint16_t value, uint16_t len)
+vcom_port_data_setup (uint8_t req, uint8_t req_no, struct control_info *detail)
 {
-  (void)value;
  if (USB_SETUP_GET (req))
    {
-      if (req_no == USB_CDC_REQ_GET_LINE_CODING
-	  && len == sizeof (line_coding))
-	{
-	  usb_lld_set_data_to_send (&line_coding, sizeof (line_coding));
-	  return USB_SUCCESS;
-	}
+      if (req_no == USB_CDC_REQ_GET_LINE_CODING)
+	return usb_lld_reply_request (&line_coding, sizeof(line_coding), detail);
    }
  else  /* USB_SETUP_SET (req) */
    {
      if (req_no == USB_CDC_REQ_SET_LINE_CODING
-	  && len == sizeof (line_coding))
+	  && detail->len == sizeof (line_coding))
 	{
 	  usb_lld_set_data_to_recv (&line_coding, sizeof (line_coding));
 	  return USB_SUCCESS;
@@ -239,38 +240,29 @@ vcom_port_data_setup (uint8_t req, uint8_t req_no, uint16_t value, uint16_t len)
 }

 int
-usb_cb_setup (uint8_t req, uint8_t req_no,
-	       uint16_t value, uint16_t index, uint16_t len)
+usb_cb_setup (uint8_t req, uint8_t req_no, struct control_info *detail)
 {
  uint8_t type_rcp = req & (REQUEST_TYPE|RECIPIENT);

-  (void)len;
-  if (type_rcp == (CLASS_REQUEST | INTERFACE_RECIPIENT))
-    if (index == 0)
-      return vcom_port_data_setup (req, req_no, value, len);
+  if (type_rcp == (CLASS_REQUEST | INTERFACE_RECIPIENT) && detail->index == 0)
+    return vcom_port_data_setup (req, req_no, detail);

  return USB_UNSUPPORT;
 }

 int
 usb_cb_get_descriptor (uint8_t rcp, uint8_t desc_type, uint8_t desc_index,
-		       uint16_t index)
+		       struct control_info *detail)
 {
-  (void)index;
  if (rcp != DEVICE_RECIPIENT)
    return USB_UNSUPPORT;

  if (desc_type == DEVICE_DESCRIPTOR)
-    {
-      usb_lld_set_data_to_send (vcom_device_desc, sizeof (vcom_device_desc));
-      return USB_SUCCESS;
-    }
+    return usb_lld_reply_request (vcom_device_desc, sizeof (vcom_device_desc),
+				  detail);
  else if (desc_type == CONFIG_DESCRIPTOR)
-    {
-      usb_lld_set_data_to_send (vcom_configuration_desc,
-				sizeof (vcom_configuration_desc));
-      return USB_SUCCESS;
-    }
+    return usb_lld_reply_request (vcom_config_desc, sizeof (vcom_config_desc),
+				  detail);
  else if (desc_type == STRING_DESCRIPTOR)
    {
      const uint8_t *str;
@@ -298,8 +290,7 @@ usb_cb_get_descriptor (uint8_t rcp, uint8_t desc_type, uint8_t desc_index,
 	  return USB_UNSUPPORT;
 	}

-      usb_lld_set_data_to_send (str, size);
-      return USB_SUCCESS;
+      return usb_lld_reply_request (str, size, detail);
    }

  return USB_UNSUPPORT;
@@ -374,9 +365,11 @@ int usb_cb_handle_event (uint8_t event_type, uint16_t value)
 }


-int usb_cb_interface (uint8_t cmd, uint16_t interface, uint16_t alt)
+int usb_cb_interface (uint8_t cmd, struct control_info *detail)
 {
-  static uint8_t zero = 0;
+  const uint8_t zero = 0;
+  uint16_t interface = detail->index;
+  uint16_t alt = detail->value;

  if (interface >= NUM_INTERFACES)
    return USB_UNSUPPORT;
@@ -393,8 +386,7 @@ int usb_cb_interface (uint8_t cmd, uint16_t interface, uint16_t alt)
 	}

    case USB_GET_INTERFACE:
-      usb_lld_set_data_to_send (&zero, 1);
-      return USB_SUCCESS;
+      return usb_lld_reply_request (&zero, 1, detail);

    default:
    case USB_QUERY_INTERFACE:
--- a/example-cdc/usb_lld.h
+++ b/example-cdc/usb_lld.h
@@ -55,15 +55,19 @@ enum
  USB_SUCCESS = 1,
 };

+struct control_info {
+  uint16_t value;
+  uint16_t index;
+  uint16_t len;
+};
+
 void usb_cb_device_reset (void);
-void usb_cb_ctrl_write_finish (uint8_t req, uint8_t req_no,
-			       uint16_t value, uint16_t index, uint16_t len);
-int usb_cb_setup (uint8_t req, uint8_t req_no, uint16_t value,
-		  uint16_t index, uint16_t len);
+int usb_cb_setup (uint8_t req, uint8_t req_no, struct control_info *detail);
+int usb_cb_interface (uint8_t cmd, struct control_info *detail);
 int usb_cb_get_descriptor (uint8_t rcp, uint8_t desc_type, uint8_t desc_index,
-			   uint16_t index);
+			   struct control_info *detail);
 int usb_cb_handle_event (uint8_t event_type, uint16_t value);
-int usb_cb_interface (uint8_t cmd, uint16_t interface, uint16_t value);
+void usb_cb_ctrl_write_finish (uint8_t req, uint8_t req_no, uint16_t value);

 enum {
  USB_EVENT_ADDRESS,
@@ -89,52 +93,30 @@ enum DEVICE_STATE
  CONFIGURED
 };

-extern const uint8_t usb_initial_feature;
-
-extern void usb_lld_init (uint8_t feature);
-
-extern void usb_lld_to_pmabuf (const void *src, uint16_t addr, size_t n);
-
-extern void usb_lld_from_pmabuf (void *dst, uint16_t addr, size_t n);
-
-extern void usb_lld_stall_tx (int ep_num);
-
-extern void usb_lld_stall_rx (int ep_num);
-
-extern int usb_lld_tx_data_len (int ep_num);
-
-extern void usb_lld_txcpy (const void *src, int ep_num, int offset, size_t len);
-
-extern void usb_lld_tx_enable (int ep_num, size_t len);
-
-extern void usb_lld_write (uint8_t ep_num, const void *buf, size_t len);
-
-extern void usb_lld_rx_enable (int ep_num);
-
-extern int usb_lld_rx_data_len (int ep_num);
-
-extern void usb_lld_rxcpy (uint8_t *dst, int ep_num, int offset, size_t len);
-
-extern void usb_lld_reset (void);
-
-extern void usb_lld_setup_endpoint (int ep_num, int ep_type, int ep_kind,
+void usb_lld_init (uint8_t feature);
+void usb_lld_to_pmabuf (const void *src, uint16_t addr, size_t n);
+void usb_lld_from_pmabuf (void *dst, uint16_t addr, size_t n);
+void usb_lld_stall_tx (int ep_num);
+void usb_lld_stall_rx (int ep_num);
+int usb_lld_tx_data_len (int ep_num);
+void usb_lld_txcpy (const void *src, int ep_num, int offset, size_t len);
+void usb_lld_tx_enable (int ep_num, size_t len);
+void usb_lld_write (uint8_t ep_num, const void *buf, size_t len);
+int usb_lld_reply_request (const void *buf, size_t buflen,
+			   struct control_info *ctrl);
+void usb_lld_rx_enable (int ep_num);
+int usb_lld_rx_data_len (int ep_num);
+void usb_lld_rxcpy (uint8_t *dst, int ep_num, int offset, size_t len);
+void usb_lld_reset (void);
+void usb_lld_setup_endpoint (int ep_num, int ep_type, int ep_kind,
 			     int ep_rx_addr, int ep_tx_addr,
 			     int ep_rx_memory_size);
+void usb_lld_set_configuration (uint8_t config);
+uint8_t usb_lld_current_configuration (void);
+void usb_lld_set_feature (uint8_t feature);
+void usb_lld_set_data_to_recv (const void *p, size_t len);

-extern void usb_lld_set_configuration (uint8_t config);
+void usb_lld_prepare_shutdown (void);
+void usb_lld_shutdown (void);

-extern uint8_t usb_lld_current_configuration (void);
-
-extern void usb_lld_set_feature (uint8_t feature);
-
-extern void usb_lld_set_data_to_send (const void *p, size_t len);
-
-extern inline void usb_lld_set_data_to_recv (void *p, size_t len)
-{
-  usb_lld_set_data_to_send ((const void *)p, len);
-}
-
-extern void usb_lld_prepare_shutdown (void);
-extern void usb_lld_shutdown (void);
-
-extern void usb_interrupt_handler (void);
+void usb_interrupt_handler (void);
--- a/example-cdc/usb_stm32f103.c
+++ b/example-cdc/usb_stm32f103.c
@@ -1,9 +1,6 @@
 #include <stdint.h>
 #include <stdlib.h>

-#define TRUE  1
-#define FALSE 0
-
 #include "sys.h"
 #include "usb_lld.h"

@@ -49,33 +46,27 @@ enum FEATURE_SELECTOR

 struct DATA_INFO
 {
-  uint16_t len;
-  uint16_t offset;
  uint8_t *addr;
+  uint16_t len;
  uint8_t require_zlp;
 };

-struct CONTROL_INFO
-{
-  uint8_t bmRequestType;
-  uint8_t bRequest;
-  uint16_t wValue;
-  uint16_t wIndex;
-  uint16_t wLength;
-};

 struct DEVICE_INFO
 {
  uint8_t current_configuration;
  uint8_t current_feature;
  uint8_t state;
+  /**/
+  uint8_t bmRequestType;
+  uint8_t bRequest;
+  /**/
+  uint16_t value;
 };

-static struct CONTROL_INFO control_info;
 static struct DEVICE_INFO device_info;
 static struct DATA_INFO data_info;

-static struct CONTROL_INFO *const ctrl_p = &control_info;
 static struct DEVICE_INFO *const dev_p = &device_info;
 static struct DATA_INFO *const data_p = &data_info;

@@ -160,7 +151,7 @@ static struct DATA_INFO *const data_p = &data_info;
 #define EPRX_DTOG1     (0x1000) /* EndPoint RX Data TOGgle bit1 */
 #define EPRX_DTOG2     (0x2000) /* EndPoint RX Data TOGgle bit1 */

-static void usb_handle_transfer (void);
+static void usb_handle_transfer (uint16_t istr_value);

 static void st103_set_btable (void)
 {
@@ -390,36 +381,36 @@ usb_interrupt_handler (void)
 {
  uint16_t istr_value = st103_get_istr ();

-  if ((istr_value & ISTR_CTR))
-    usb_handle_transfer ();
-
  if ((istr_value & ISTR_RESET))
    {
      st103_set_istr (CLR_RESET);
      usb_cb_device_reset ();
    }
-
+  else
+    {
      if ((istr_value & ISTR_OVR))
 	st103_set_istr (CLR_OVR);

      if ((istr_value & ISTR_ERR))
 	st103_set_istr (CLR_ERR);
+
+      if ((istr_value & ISTR_CTR))
+	usb_handle_transfer (istr_value);
+    }
 }

 static void handle_datastage_out (void)
 {
  if (data_p->addr && data_p->len)
    {
-      uint8_t *buf;
      uint32_t len = st103_get_rx_count (ENDP0);

      if (len > data_p->len)
 	len = data_p->len;

-      buf = data_p->addr + data_p->offset;
-      usb_lld_from_pmabuf (buf, st103_get_rx_addr (ENDP0), len);
+      usb_lld_from_pmabuf (data_p->addr, st103_get_rx_addr (ENDP0), len);
      data_p->len -= len;
-      data_p->offset += len;
+      data_p->addr += len;
    }

  if (data_p->len == 0)
@@ -438,13 +429,12 @@ static void handle_datastage_out (void)
 static void handle_datastage_in (void)
 {
  uint32_t len = USB_MAX_PACKET_SIZE;;
-  const uint8_t *buf;

  if ((data_p->len == 0) && (dev_p->state == LAST_IN_DATA))
    {
-      if (data_p->require_zlp == TRUE)
+      if (data_p->require_zlp)
 	{
-	  data_p->require_zlp = FALSE;
+	  data_p->require_zlp = 0;

 	  /* No more data to send.  Send empty packet */
 	  st103_set_tx_count (ENDP0, 0);
@@ -465,40 +455,33 @@ static void handle_datastage_in (void)
  if (len > data_p->len)
    len = data_p->len;

-  buf = (const uint8_t *)data_p->addr + data_p->offset;
-  usb_lld_to_pmabuf (buf, st103_get_tx_addr (ENDP0), len);
+  usb_lld_to_pmabuf (data_p->addr, st103_get_tx_addr (ENDP0), len);
  data_p->len -= len;
-  data_p->offset += len;
+  data_p->addr += len;
  st103_set_tx_count (ENDP0, len);
  st103_ep_set_tx_status (ENDP0, EP_TX_VALID);
 }

-typedef int (*HANDLER) (uint8_t req,
-			uint16_t value, uint16_t index, uint16_t length);
+typedef int (*HANDLER) (uint8_t req, struct control_info *detail);

-static int std_none (uint8_t req,
-		     uint16_t value, uint16_t index, uint16_t length)
+static int std_none (uint8_t req, struct control_info *detail)
 {
-  (void)req; (void)value; (void)index; (void)length;
+  (void)req; (void)detail;
  return USB_UNSUPPORT;
 }

-static int std_get_status (uint8_t req,
-			   uint16_t value, uint16_t index, uint16_t length)
+static int std_get_status (uint8_t req, struct control_info *detail)
 {
-  static uint16_t status_info;
  uint8_t rcp = req & RECIPIENT;
+  uint16_t status_info = 0;

-  status_info = 0;		/* Reset Status Information */
-  data_p->addr = (uint8_t *)&status_info;
-
-  if (value != 0 || length != 2 || (index >> 8) != 0
+  if (detail->value != 0 || detail->len != 2 || (detail->index >> 8) != 0
      || (req & REQUEST_DIR) == 0)
    return USB_UNSUPPORT;

  if (rcp == DEVICE_RECIPIENT)
    {
-      if (index == 0)
+      if (detail->index == 0)
 	{
 	  /* Get Device Status */
 	  uint8_t feature = dev_p->current_feature;
@@ -515,8 +498,7 @@ static int std_get_status (uint8_t req,
 	  else /* Self-powered */
 	    status_info &= ~1;

-	  data_p->len = 2;
-	  return USB_SUCCESS;
+	  return usb_lld_reply_request (&status_info, 2, detail);
 	}
    }
  else if (rcp == INTERFACE_RECIPIENT)
@@ -526,22 +508,21 @@ static int std_get_status (uint8_t req,
      if (dev_p->current_configuration == 0)
 	return USB_UNSUPPORT;

-      r = usb_cb_interface (USB_QUERY_INTERFACE, index, 0);
+      r = usb_cb_interface (USB_QUERY_INTERFACE, detail);
      if (r != USB_SUCCESS)
 	return USB_UNSUPPORT;

-      data_p->len = 2;
-      return USB_SUCCESS;
+      return usb_lld_reply_request (&status_info, 2, detail);
    }
  else if (rcp == ENDPOINT_RECIPIENT)
    {
-      uint8_t endpoint = (index & 0x0f);
+      uint8_t endpoint = (detail->index & 0x0f);
      uint16_t status;

-      if ((index & 0x70) || endpoint == ENDP0)
+      if ((detail->index & 0x70) || endpoint == ENDP0)
 	return USB_UNSUPPORT;

-      if ((index & 0x80))
+      if ((detail->index & 0x80))
 	{
 	  status = st103_ep_get_tx_status (endpoint);
 	  if (status == 0)		/* Disabled */
@@ -558,15 +539,13 @@ static int std_get_status (uint8_t req,
 	    status_info |= 1; /* OUT Endpoint stalled */
 	}

-	data_p->len = 2;
-	return USB_SUCCESS;
+      return usb_lld_reply_request (&status_info, 2, detail);
    }

  return USB_UNSUPPORT;
 }

-static int std_clear_feature (uint8_t req, uint16_t value,
-			      uint16_t index, uint16_t length)
+static int std_clear_feature (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

@@ -575,10 +554,10 @@ static int std_clear_feature (uint8_t req, uint16_t value,

  if (rcp == DEVICE_RECIPIENT)
    {
-      if (length != 0 || index != 0)
+      if (detail->len != 0 || detail->index != 0)
 	return USB_UNSUPPORT;

-      if (value == DEVICE_REMOTE_WAKEUP)
+      if (detail->value == DEVICE_REMOTE_WAKEUP)
 	{
 	  dev_p->current_feature &= ~(1 << 5);
 	  return USB_SUCCESS;
@@ -586,17 +565,17 @@ static int std_clear_feature (uint8_t req, uint16_t value,
    }
  else if (rcp == ENDPOINT_RECIPIENT)
    {
-      uint8_t endpoint = (index & 0x0f);
+      uint8_t endpoint = (detail->index & 0x0f);
      uint16_t status;

      if (dev_p->current_configuration == 0)
 	return USB_UNSUPPORT;

-      if (length != 0 || (index >> 8) != 0 || value != ENDPOINT_STALL
-	  || endpoint == ENDP0)
+      if (detail->len != 0 || (detail->index >> 8) != 0
+	  || detail->value != ENDPOINT_STALL || endpoint == ENDP0)
 	return USB_UNSUPPORT;

-      if ((index & 0x80))
+      if ((detail->index & 0x80))
 	status = st103_ep_get_tx_status (endpoint);
      else
 	status = st103_ep_get_rx_status (endpoint);
@@ -604,7 +583,7 @@ static int std_clear_feature (uint8_t req, uint16_t value,
      if (status == 0)		/* Disabled */
 	return USB_UNSUPPORT;

-      if (index & 0x80)		/* IN endpoint */
+      if (detail->index & 0x80)		/* IN endpoint */
 	st103_ep_clear_dtog_tx (endpoint);
      else			/* OUT endpoint */
 	st103_ep_clear_dtog_rx (endpoint);
@@ -616,8 +595,7 @@ static int std_clear_feature (uint8_t req, uint16_t value,
  return USB_UNSUPPORT;
 }

-static int std_set_feature (uint8_t req, uint16_t value,
-			    uint16_t index, uint16_t length)
+static int std_set_feature (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

@@ -626,10 +604,10 @@ static int std_set_feature (uint8_t req, uint16_t value,

  if (rcp == DEVICE_RECIPIENT)
    {
-      if (length != 0 || index != 0)
+      if (detail->len != 0 || detail->index != 0)
 	return USB_UNSUPPORT;

-      if (value == DEVICE_REMOTE_WAKEUP)
+      if (detail->value == DEVICE_REMOTE_WAKEUP)
 	{
 	  dev_p->current_feature |= 1 << 5;
 	  // event??
@@ -638,16 +616,17 @@ static int std_set_feature (uint8_t req, uint16_t value,
    }
  else if (rcp == ENDPOINT_RECIPIENT)
    {
-      uint8_t endpoint = (index & 0x0f);
+      uint8_t endpoint = (detail->index & 0x0f);
      uint32_t status;

      if (dev_p->current_configuration == 0)
 	return USB_UNSUPPORT;

-      if (length != 0 || (index >> 8) != 0 || value != 0 || endpoint == ENDP0)
+      if (detail->len != 0 || (detail->index >> 8) != 0
+	  || detail->value != 0 || endpoint == ENDP0)
 	return USB_UNSUPPORT;

-      if ((index & 0x80))
+      if ((detail->index & 0x80))
 	status = st103_ep_get_tx_status (endpoint);
      else
 	status = st103_ep_get_rx_status (endpoint);
@@ -655,7 +634,7 @@ static int std_set_feature (uint8_t req, uint16_t value,
      if (status == 0)		/* Disabled */
 	return USB_UNSUPPORT;

-      if (index & 0x80)
+      if (detail->index & 0x80)
 	/* IN endpoint */
 	st103_ep_set_tx_status (endpoint, EP_TX_STALL);
      else
@@ -669,77 +648,59 @@ static int std_set_feature (uint8_t req, uint16_t value,
  return USB_UNSUPPORT;
 }

-static int std_set_address (uint8_t req, uint16_t value,
-			    uint16_t index, uint16_t length)
+static int std_set_address (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

  if ((req & REQUEST_DIR) == 1)
    return USB_UNSUPPORT;

-  if (rcp == DEVICE_RECIPIENT)
-    {
-      if (length == 0 && value <= 127 && index == 0
-	  && dev_p->current_configuration == 0)
+  if (rcp == DEVICE_RECIPIENT && detail->len == 0 && detail->value <= 127
+      && detail->index == 0 && dev_p->current_configuration == 0)
    return USB_SUCCESS;
-    }

  return USB_UNSUPPORT;
 }

-static int std_get_descriptor (uint8_t req, uint16_t value,
-			       uint16_t index, uint16_t length)
+static int std_get_descriptor (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

  if ((req & REQUEST_DIR) == 0)
    return USB_UNSUPPORT;

-  (void)length;
-  return usb_cb_get_descriptor (rcp, (value >> 8), (value & 0xff), index);
+  return usb_cb_get_descriptor (rcp, (detail->value >> 8),
+				(detail->value & 0xff), detail);
 }

-static int std_get_configuration (uint8_t req, uint16_t value,
-				  uint16_t index, uint16_t length)
+static int std_get_configuration (uint8_t req,  struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

+  (void)detail;
  if ((req & REQUEST_DIR) == 0)
    return USB_UNSUPPORT;

-  (void)value;  (void)index;  (void)length;
  if (rcp == DEVICE_RECIPIENT)
-    {
-      data_p->addr = &dev_p->current_configuration;
-      data_p->len = 1;
-      return USB_SUCCESS;
-    }
+    return usb_lld_reply_request (&dev_p->current_configuration, 1, detail);

  return USB_UNSUPPORT;
 }

-static int std_set_configuration (uint8_t req, uint16_t value,
-				  uint16_t index, uint16_t length)
+static int std_set_configuration (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

  if ((req & REQUEST_DIR) == 1)
    return USB_UNSUPPORT;

-  if (rcp == DEVICE_RECIPIENT && index == 0 && length == 0)
-    {
-      int r;
-
-      r = usb_cb_handle_event (USB_EVENT_CONFIG, value);
-      if (r == USB_SUCCESS)
-	return USB_SUCCESS;
-    }
+  if (rcp == DEVICE_RECIPIENT && detail->index == 0 && detail->len == 0)
+    return usb_cb_handle_event (USB_EVENT_CONFIG, detail->value);

  return USB_UNSUPPORT;
 }

-static int std_get_interface (uint8_t req, uint16_t value,
-			      uint16_t index, uint16_t length)
+static int std_get_interface (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

@@ -748,74 +709,61 @@ static int std_get_interface (uint8_t req, uint16_t value,

  if (rcp == INTERFACE_RECIPIENT)
    {
-      if (value != 0 || (index >> 8) != 0 || length != 1)
+      if (detail->value != 0 || (detail->index >> 8) != 0 || detail->len != 1)
 	return USB_UNSUPPORT;

      if (dev_p->current_configuration == 0)
 	return USB_UNSUPPORT;

-      return usb_cb_interface (USB_GET_INTERFACE, index, 0);
+      return usb_cb_interface (USB_GET_INTERFACE, detail);
    }

  return USB_UNSUPPORT;
 }

-static int std_set_interface (uint8_t req, uint16_t value,
-			      uint16_t index, uint16_t length)
+static int std_set_interface (uint8_t req, struct control_info *detail)
 {
  uint8_t rcp = req & RECIPIENT;

-  if ((req & REQUEST_DIR) == 1)
+  if ((req & REQUEST_DIR) == 1 || rcp != INTERFACE_RECIPIENT
+      || detail->len != 0 || (detail->index >> 8) != 0
+      || (detail->value >> 8) != 0 || dev_p->current_configuration == 0)
    return USB_UNSUPPORT;

-  if (rcp == INTERFACE_RECIPIENT)
-    {
-      int r;
-
-      if (length != 0 || (index >> 8) != 0 || (value >> 8) != 0)
-	return  USB_UNSUPPORT;
-
-      if (dev_p->current_configuration != 0)
-	return USB_UNSUPPORT;
-
-      r = usb_cb_interface (USB_SET_INTERFACE, index, value);
-      if (r == USB_SUCCESS)
-	return USB_SUCCESS;
-    }
-
-  return USB_UNSUPPORT;
+  return usb_cb_interface (USB_SET_INTERFACE, detail);
 }


 static void handle_setup0 (void)
 {
  const uint16_t *pw;
+  struct control_info ctrl;
  uint16_t w;
-  uint8_t req;
+  uint8_t req_no;
  int r = USB_UNSUPPORT;
  HANDLER handler;

  pw = (uint16_t *)(PMA_ADDR + (uint8_t *)(st103_get_rx_addr (ENDP0) * 2));
  w = *pw++;

-  ctrl_p->bmRequestType = w & 0xff;
-  ctrl_p->bRequest = req = w >> 8;
+  dev_p->bmRequestType = w & 0xff;
+  dev_p->bRequest = req_no = w >> 8;
  pw++;
-  ctrl_p->wValue = *pw++;
+  ctrl.value = *pw++;
  pw++;
-  ctrl_p->wIndex  = *pw++;
+  ctrl.index  = *pw++;
  pw++;
-  ctrl_p->wLength = *pw;
+  ctrl.len = *pw;

  data_p->addr = NULL;
  data_p->len = 0;
-  data_p->offset = 0;
+  data_p->require_zlp = 0;

-  if ((ctrl_p->bmRequestType & REQUEST_TYPE) == STANDARD_REQUEST)
+  if ((dev_p->bmRequestType & REQUEST_TYPE) == STANDARD_REQUEST)
    {
-      if (req < TOTAL_REQUEST)
+      if (req_no < TOTAL_REQUEST)
 	{
-	  switch (req)
+	  switch (req_no)
 	    {
 	    case 0: handler = std_get_status;  break;
 	    case 1: handler = std_clear_feature;  break;
@@ -829,35 +777,20 @@ static void handle_setup0 (void)
 	    default: handler = std_none;  break;
 	    }

-	  r = (*handler) (ctrl_p->bmRequestType,
-			  ctrl_p->wValue, ctrl_p->wIndex, ctrl_p->wLength);
+	  r = (*handler) (dev_p->bmRequestType, &ctrl);
 	}
    }
  else
-    r = usb_cb_setup (ctrl_p->bmRequestType, req,
-		      ctrl_p->wValue, ctrl_p->wIndex, ctrl_p->wLength);
+    r = usb_cb_setup (dev_p->bmRequestType, req_no, &ctrl);

  if (r != USB_SUCCESS)
    dev_p->state = STALLED;
  else
    {
-      if (USB_SETUP_GET (ctrl_p->bmRequestType))
+      if (USB_SETUP_SET (dev_p->bmRequestType))
 	{
-	  uint32_t len = ctrl_p->wLength;
-
-	  /* Restrict the data length to be the one host asks for */
-	  if (data_p->len > len)
-	    data_p->len = len;
-
-	  if ((data_p->len % USB_MAX_PACKET_SIZE) == 0)
-	    data_p->require_zlp = TRUE;
-	  else
-	    data_p->require_zlp = FALSE;
-
-	  dev_p->state = IN_DATA;
-	  handle_datastage_in ();
-	}
-      else if (ctrl_p->wLength == 0)
+	  dev_p->value = ctrl.value;
+	  if (ctrl.len == 0)
 	    {
 	      dev_p->state = WAIT_STATUS_IN;
 	      st103_set_tx_count (ENDP0, 0);
@@ -870,6 +803,7 @@ static void handle_setup0 (void)
 	    }
 	}
    }
+}

 static void handle_in0 (void)
 {
@@ -877,17 +811,16 @@ static void handle_in0 (void)
    handle_datastage_in ();
  else if (dev_p->state == WAIT_STATUS_IN)
    {
-      if ((ctrl_p->bRequest == SET_ADDRESS) &&
-	  ((ctrl_p->bmRequestType & (REQUEST_TYPE | RECIPIENT))
+      if ((dev_p->bRequest == SET_ADDRESS) &&
+	  ((dev_p->bmRequestType & (REQUEST_TYPE | RECIPIENT))
 	   == (STANDARD_REQUEST | DEVICE_RECIPIENT)))
 	{
-	  st103_set_daddr (ctrl_p->wValue);
-	  usb_cb_handle_event (USB_EVENT_ADDRESS, ctrl_p->wValue);
+	  st103_set_daddr (dev_p->value);
+	  usb_cb_handle_event (USB_EVENT_ADDRESS, dev_p->value);
 	}
      else
-	usb_cb_ctrl_write_finish  (ctrl_p->bmRequestType,
-				   ctrl_p->bRequest, ctrl_p->wValue,
-				   ctrl_p->wIndex, ctrl_p->wLength);
+	usb_cb_ctrl_write_finish  (dev_p->bmRequestType, dev_p->bRequest,
+				   dev_p->value);

      dev_p->state = STALLED;
    }
@@ -931,14 +864,11 @@ void WEAK EP6_OUT_Callback (void);
 void WEAK EP7_OUT_Callback (void);

 static void
-usb_handle_transfer (void)
+usb_handle_transfer (uint16_t istr_value)
 {
  uint16_t ep_value = 0;
-  uint16_t istr_value;
  uint8_t ep_index;

-  while (((istr_value = st103_get_istr ()) & ISTR_CTR))
-    {
  ep_index = (istr_value & ISTR_EP_ID);
  /* Decode and service non control endpoints interrupt  */
  /* process related endpoint register */
@@ -998,7 +928,6 @@ usb_handle_transfer (void)
 	}
    }
 }
-}

 void usb_lld_reset (void)
 {
@@ -1113,7 +1042,7 @@ void usb_lld_set_feature (uint8_t feature)
  dev_p->current_feature = feature;
 }

-void usb_lld_set_data_to_send (const void *p, size_t len)
+void usb_lld_set_data_to_recv (const void *p, size_t len)
 {
  data_p->addr = (uint8_t *)p;
  data_p->len = len;
@@ -1191,3 +1120,49 @@ void usb_lld_from_pmabuf (void *dst, uint16_t addr, size_t n)
      *d = (w & 0xff);
    }
 }
+
+
+/*
+ * BUF: Pointer to data memory.  Data memory should not be allocated
+ *      on stack when BUFLEN > USB_MAX_PACKET_SIZE.
+ *
+ * BUFLEN: size of the data.
+ */
+int
+usb_lld_reply_request (const void *buf, size_t buflen, struct control_info *ctl)
+{
+  uint32_t len_asked = ctl->len;
+  uint32_t len;
+
+  data_p->addr = (void *)buf;
+  data_p->len = buflen;
+
+  /* Restrict the data length to be the one host asks for */
+  if (data_p->len > len_asked)
+    data_p->len = len_asked;
+
+  if (data_p->len != 0 && (data_p->len % USB_MAX_PACKET_SIZE) == 0)
+    data_p->require_zlp = 1;
+
+  if (data_p->len < USB_MAX_PACKET_SIZE)
+    {
+      len = data_p->len;
+      dev_p->state = LAST_IN_DATA;
+    }
+  else
+    {
+      len = USB_MAX_PACKET_SIZE;
+      dev_p->state = IN_DATA;
+    }
+
+  if (len)
+    {
+      usb_lld_to_pmabuf (data_p->addr, st103_get_tx_addr (ENDP0), len);
+      data_p->len -= len;
+      data_p->addr += len;
+    }
+
+  st103_set_tx_count (ENDP0, len);
+  st103_ep_set_tx_status (ENDP0, EP_TX_VALID);
+  return USB_SUCCESS;
+}
--- a/example-fsm-55/Makefile
+++ b/example-fsm-55/Makefile
@@ -0,0 +1,42 @@
+# Makefile for Hacker Emblem application of Chopstx
+
+PROJECT = hacker-emblem
+
+CHOPSTX = ..
+LDSCRIPT= hacker-emblem.ld
+
+CSRC = sys.c hh.c
+
+# Hacker Emblem and "Happy Hacking!" demonstration
+# CSRC = sys.c hh.c
+
+# Debian logo demonstration
+# CSRC = sys.c debian-logo.c
+
+# "Hiroshi & Ayumi with Tulip" demonstration
+# CSRC = sys.c hiroshi-ayumi.c
+
+###################################
+CROSS = arm-none-eabi-
+CC   = $(CROSS)gcc
+LD   = $(CROSS)gcc
+OBJCOPY   = $(CROSS)objcopy
+
+MCU   = cortex-m0 # -save-temps
+CWARN = -Wall -Wextra -Wstrict-prototypes
+DEFS  = -DMAKE_ENTRY_PUBLIC \
+        -DFREE_STANDING -DMHZ=48 -DUSE_WFI_FOR_IDLE
+OPT   = -O3 -Os -g
+LIBS  =
+
+####################
+include ../rules.mk
+
+board.h:
+	@echo Please make a symbolic link \'board.h\' to a file in ../board;
+	@exit 1
+
+sys.c: board.h
+
+distclean: clean
+	rm -f board.h
--- a/example-fsm-55/README
+++ b/example-fsm-55/README
@@ -0,0 +1,17 @@
+FSM-55 LED Matrix Display Board is a simple board to play 5x5 LED
+Display.  Please see the product page:
+
+    http://www.seeedstudio.com/depot/FSM55-LED-Matrix-Display-p-2121.html
+
+There are three demonstrations and default is Hacker Emblem and "Happy
+Hacking!".  Please edit CSRC variable in the Makefile to select other
+applications.
+
+
+The file stlink-v2.cfg can be used for ST-Link/V2 with OpenOCD.  You
+can flash by typing:
+
+    $ openocd -f ./stlink-v2.cfg -c "program build/hacker-emblem.elf; reset run; shutdown"
+
+Thanks to Kiwamu Okabe who kindly tested OpenOCD and wrote the
+configuration.
--- a/example-fsm-55/board.h
+++ b/example-fsm-55/board.h
@@ -0,0 +1 @@
+../board/board-fsm-55.h
--- a/example-fsm-55/debian-logo.c
+++ b/example-fsm-55/debian-logo.c
@@ -0,0 +1,473 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chopstx.h>
+
+#include "board.h"
+
+static uint8_t main_finished;
+
+#define PERIPH_BASE	0x40000000
+#define APBPERIPH_BASE   PERIPH_BASE
+#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
+#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
+#define AHB2PERIPH_BASE	(PERIPH_BASE + 0x08000000)
+
+struct GPIO {
+  volatile uint32_t MODER;
+  volatile uint16_t OTYPER;
+  uint16_t dummy0;
+  volatile uint32_t OSPEEDR;
+  volatile uint32_t PUPDR;
+  volatile uint16_t IDR;
+  uint16_t dummy1;
+  volatile uint16_t ODR;
+  uint16_t dummy2;
+  volatile uint16_t BSRR;
+  uint16_t dummy3;
+  volatile uint32_t LCKR;
+  volatile uint32_t AFR[2];
+  volatile uint16_t BRR;
+  uint16_t dummy4;
+};
+#define GPIOA_BASE	(AHB2PERIPH_BASE + 0x0000)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOF_BASE	(AHB2PERIPH_BASE + 0x1400)
+#define GPIOF		((struct GPIO *) GPIOF_BASE)
+
+static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
+static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
+
+static chopstx_mutex_t mtx;
+static chopstx_cond_t cnd0, cnd1;
+
+#define BUTTON_PUSHED 1
+static uint8_t button_state;
+
+static uint8_t
+user_button (void)
+{
+  return button_state;
+}
+
+
+static uint8_t l_data[5];
+#define LED_FULL ((0x1f << 20)|(0x1f << 15)|(0x1f << 10)|(0x1f << 5)|0x1f)
+
+static void
+set_led_display (uint32_t data)
+{
+  l_data[0] = (data >>  0) & 0x1f;
+  l_data[1] = (data >>  5) & 0x1f;
+  l_data[2] = (data >> 10) & 0x1f;
+  l_data[3] = (data >> 15) & 0x1f;
+  l_data[4] = (data >> 20) & 0x1f;
+}
+
+static void
+scroll_led_display (uint8_t row)
+{
+  l_data[0] = (l_data[0] << 1) | ((row >> 0) & 1);
+  l_data[1] = (l_data[1] << 1) | ((row >> 1) & 1);
+  l_data[2] = (l_data[2] << 1) | ((row >> 2) & 1);
+  l_data[3] = (l_data[3] << 1) | ((row >> 3) & 1);
+  l_data[4] = (l_data[4] << 1) | ((row >> 4) & 1);
+}
+
+
+static void
+wait_for (uint32_t usec)
+{
+  chopstx_usec_wait (usec);
+}
+
+static void
+led_prepare_row (uint8_t col)
+{
+  uint16_t data = 0x1f;
+
+  data |= ((l_data[0] & (1 << col)) ? 1 : 0) << 5;
+  data |= ((l_data[1] & (1 << col)) ? 1 : 0) << 6;
+  data |= ((l_data[2] & (1 << col)) ? 1 : 0) << 7;
+  data |= ((l_data[3] & (1 << col)) ? 1 : 0) << 9;
+  data |= ((l_data[4] & (1 << col)) ? 1 : 0) << 10;
+  GPIO_LED->ODR = data;
+}
+
+
+static void
+led_enable_column (uint8_t col)
+{
+  GPIO_LED->BRR = (1 << col);
+}
+
+static void *
+led (void *arg)
+{
+  (void)arg;
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_wait (&cnd0, &mtx);
+  chopstx_mutex_unlock (&mtx);
+
+  while (!main_finished)
+    {
+      int i;
+
+      for (i = 0; i < 5; i++)
+	{
+	  led_prepare_row (i);
+	  led_enable_column (i);
+	  wait_for (1000);
+	}
+    }
+
+  GPIO_LED->ODR = 0x0000;	/* Off all LEDs.  */
+  GPIO_LED->OSPEEDR = 0;
+  GPIO_LED->OTYPER = 0;
+  GPIO_LED->MODER = 0;		/* Input mode.  */
+  GPIO_OTHER->PUPDR = 0x0000;	/* No pull-up.  */
+
+  return NULL;
+}
+
+
+static uint8_t get_button_sw (void) { return (GPIO_OTHER->IDR & 1) == 0; }
+
+static void *
+button (void *arg)
+{
+  uint8_t last_button = 0;
+
+  (void)arg;
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_wait (&cnd1, &mtx);
+  chopstx_mutex_unlock (&mtx);
+
+  while (!main_finished)
+    {
+      uint8_t button = get_button_sw ();
+
+      if (last_button == button && button != button_state)
+	{
+	  wait_for (1000);
+	  button = get_button_sw ();
+	  if (last_button == button)
+	    button_state = button;
+	}
+
+      wait_for (2000);
+      last_button = button;
+    }
+
+  return NULL;
+}
+
+#define PRIO_LED 3
+#define PRIO_BUTTON 2
+
+extern uint8_t __process1_stack_base__, __process1_stack_size__;
+extern uint8_t __process2_stack_base__, __process2_stack_size__;
+
+const uint32_t __stackaddr_led = (uint32_t)&__process1_stack_base__;
+const size_t __stacksize_led = (size_t)&__process1_stack_size__;
+
+const uint32_t __stackaddr_button = (uint32_t)&__process2_stack_base__;
+const size_t __stacksize_button = (size_t)&__process2_stack_size__;
+
+#define DATA55(x0,x1,x2,x3,x4) (x0<<20)|(x1<<15)|(x2<<10)|(x3<< 5)|(x4<< 0)
+#define SIZE55(img) (sizeof (img) / sizeof (uint32_t))
+
+static uint32_t logo55[] = {
+  DATA55 (0x00, 0x00, 0x00, 0x00, 0x00),
+  DATA55 (0x00, 0x00, 0x04, 0x00, 0x00),
+  DATA55 (0x00, 0x00, 0x04, 0x02, 0x00),
+  DATA55 (0x00, 0x00, 0x05, 0x02, 0x00),
+  DATA55 (0x00, 0x01, 0x05, 0x02, 0x00),
+  DATA55 (0x02, 0x01, 0x05, 0x02, 0x00),
+  DATA55 (0x06, 0x01, 0x05, 0x02, 0x00),
+  DATA55 (0x0e, 0x01, 0x05, 0x02, 0x00),
+  DATA55 (0x0e, 0x11, 0x05, 0x02, 0x00),
+  DATA55 (0x0e, 0x11, 0x15, 0x02, 0x00),
+  DATA55 (0x0e, 0x11, 0x15, 0x12, 0x00),
+  DATA55 (0x0e, 0x11, 0x15, 0x12, 0x08),
+  DATA55 (0x0e, 0x11, 0x15, 0x12, 0x08),
+  DATA55 (0x0e, 0x11, 0x16, 0x10, 0x0c),
+  DATA55 (0x0e, 0x11, 0x16, 0x10, 0x0c),
+  DATA55 (0x0e, 0x11, 0x16, 0x10, 0x0e),
+  DATA55 (0x0c, 0x12, 0x14, 0x10, 0x0f),
+  DATA55 (0x0c, 0x12, 0x14, 0x11, 0x0e),
+  DATA55 (0x08, 0x14, 0x15, 0x11, 0x0e),
+  DATA55 (0x08, 0x15, 0x15, 0x11, 0x0e),
+  DATA55 (0x01, 0x09, 0x15, 0x11, 0x0e),
+  DATA55 (0x02, 0x09, 0x15, 0x11, 0x0e),
+  DATA55 (0x06, 0x01, 0x0d, 0x11, 0x0e),
+  DATA55 (0x0e, 0x01, 0x0d, 0x11, 0x0e),
+  DATA55 (0x1e, 0x01, 0x0d, 0x11, 0x0e),
+  DATA55 (0x0e, 0x11, 0x05, 0x09, 0x06),
+  DATA55 (0x0e, 0x11, 0x15, 0x05, 0x02),
+  DATA55 (0x0e, 0x11, 0x15, 0x15, 0x02),
+  DATA55 (0x0e, 0x11, 0x15, 0x12, 0x10),
+  DATA55 (0x0e, 0x11, 0x15, 0x12, 0x08),
+  DATA55 (0x0e, 0x11, 0x15, 0x12, 0x08),
+};
+
+#define DATA55V(x0,x1,x2,x3,x4) (x0<<0)|(x1<<5)|(x2<<10)|(x3<< 15)|(x4<< 20)
+
+#define CHAR_SPC 0
+#define CHAR_H   1
+#define CHAR_A   2
+#define CHAR_P   3
+#define CHAR_Y   4
+#define CHAR_C   5
+#define CHAR_K   6
+#define CHAR_I   7
+#define CHAR_N   8
+#define CHAR_G   9
+#define CHAR_EXC 10
+#define CHAR_W   11
+#define CHAR_h   12
+#define CHAR_t   13
+#define CHAR_AP  14
+#define CHAR_s   15
+#define CHAR_U   16
+#define CHAR_QT  17
+#define CHAR_o   18
+#define CHAR_X   19
+#define CHAR_D   20
+#define CHAR_e   21
+#define CHAR_b   22
+#define CHAR_i   23
+#define CHAR_a   24
+#define CHAR_n   25
+
+static uint8_t hh[] = {
+  CHAR_H, CHAR_A, CHAR_P, CHAR_P, CHAR_Y,
+  CHAR_SPC,
+  CHAR_H, CHAR_A, CHAR_C, CHAR_K, CHAR_I, CHAR_N, CHAR_G,
+  CHAR_EXC,
+  CHAR_SPC, CHAR_SPC, CHAR_SPC,
+};
+
+static uint8_t debian[] = {
+  CHAR_SPC,
+  CHAR_D, CHAR_e, CHAR_b, CHAR_i, CHAR_a, CHAR_n,
+  CHAR_SPC, CHAR_SPC,
+};
+
+struct { uint8_t width; uint32_t data; } chargen[] = {
+  { 3, 0 },						/* SPACE */
+  { 4, DATA55V (0x1f, 0x04, 0x04, 0x1f, 0x00) },	/* H */
+  { 3, DATA55V (0x17, 0x15, 0x0f, 0x00, 0x00) },	/* A */
+  { 4, DATA55V (0x1f, 0x14, 0x14, 0x08, 0x00) },	/* P */
+  { 4, DATA55V (0x19, 0x05, 0x05, 0x1e, 0x00) },	/* Y */
+  { 4, DATA55V (0x0e, 0x11, 0x11, 0x0a, 0x00) },	/* C */
+  { 4, DATA55V (0x1f, 0x04, 0x0c, 0x13, 0x00) },	/* K */
+  { 3, DATA55V (0x11, 0x1f, 0x11, 0x00, 0x00) },	/* I */
+  { 4, DATA55V (0x1f, 0x08, 0x06, 0x1f, 0x00) },	/* N */
+  { 4, DATA55V (0x0e, 0x11, 0x15, 0x07, 0x00) },	/* G */
+  { 2, DATA55V (0x1d, 0x1c, 0x00, 0x00, 0x00) },	/* ! */
+  { 5, DATA55V (0x1e, 0x01, 0x0e, 0x01, 0x1e) },	/* W */
+  { 3, DATA55V (0x1f, 0x04, 0x07, 0x00, 0x00) },	/* h */
+  { 4, DATA55V (0x08, 0x1e, 0x09, 0x09, 0x00) },	/* t */
+  { 3, DATA55V (0x04, 0x18, 0x18, 0x00, 0x00) },	/* ' */
+  { 4, DATA55V (0x09, 0x15, 0x15, 0x12, 0x00) },	/* s */
+  { 4, DATA55V (0x1e, 0x01, 0x01, 0x1e, 0x00) },	/* U */
+  { 4, DATA55V (0x08, 0x10, 0x15, 0x08, 0x00) },	/* ? */
+  { 4, DATA55V (0x06, 0x09, 0x09, 0x06, 0x00) },	/* o */
+  { 5, DATA55V (0x11, 0x0a, 0x04, 0x0a, 0x11) },	/* X */
+  { 4, DATA55V (0x1f, 0x11, 0x11, 0x0e, 0x00) },	/* D */
+  { 4, DATA55V (0x0e, 0x15, 0x15, 0x0d, 0x00) },	/* e */
+  { 4, DATA55V (0x1f, 0x05, 0x05, 0x06, 0x00) },	/* b */
+  { 1, DATA55V (0x17, 0x00, 0x00, 0x00, 0x00) },	/* i */
+  { 4, DATA55V (0x02, 0x15, 0x15, 0x0f, 0x00) },	/* a */
+  { 4, DATA55V (0x1f, 0x08, 0x10, 0x1f, 0x00) },	/* n */
+};
+
+
+#define REPEAT_COUNT 10
+
+static int
+logo_display (void)
+{
+  unsigned int i;
+  uint8_t state = 0;
+
+  for (i = 0; i < SIZE55 (logo55); i++)
+    {
+      if (user_button ())
+	{
+	  set_led_display (LED_FULL);
+	  state = 1;
+	}
+      else if (state == 1)
+	return 0;
+      else
+	set_led_display (logo55[i]);
+      wait_for (350*1000);
+    }
+
+  return 1;
+}
+
+
+static int
+text_display (uint8_t kind)
+{
+  unsigned int i, j;
+  uint8_t *text;
+  uint8_t len;
+  uint8_t state = 0;
+
+  if (kind)
+    {
+      text = debian;
+      len = sizeof (debian);
+    }
+  else
+    {
+      text = hh;
+      len = sizeof (hh);
+    }
+
+#if 0
+  set_led_display (0);
+#endif
+  for (i = 0; i < len; i++)
+    {
+      for (j = 0; j < chargen[text[i]].width; j++)
+	{
+	  if (user_button ())
+	    {
+	      set_led_display (LED_FULL);
+	      state = 1;
+	    }
+	  else if (state == 1)
+	    return 0;
+	  else
+	    scroll_led_display ((chargen[text[i]].data >> j * 5) & 0x1f);
+	  wait_for (120*1000);
+	}
+
+      if (user_button ())
+	{
+	  set_led_display (LED_FULL);
+	  state = 1;
+	}
+      else if (state == 1)
+	return 0;
+      else
+	scroll_led_display (0);
+      wait_for (120*1000);
+    }
+
+  return 1;
+}
+
+
+static void setup_scr_sleepdeep (void);
+
+int
+main (int argc, const char *argv[])
+{
+  chopstx_t led_thd;
+  chopstx_t button_thd;
+  uint8_t happy = 1;
+  uint8_t count = 0;
+
+  (void)argc;
+  (void)argv;
+
+  chopstx_mutex_init (&mtx);
+  chopstx_cond_init (&cnd0);
+  chopstx_cond_init (&cnd1);
+
+  led_thd = chopstx_create (PRIO_LED, __stackaddr_led,
+			    __stacksize_led, led, NULL);
+  button_thd = chopstx_create (PRIO_BUTTON, __stackaddr_button,
+			       __stacksize_button, button, NULL);
+
+  chopstx_usec_wait (200*1000);
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_signal (&cnd0);
+  chopstx_cond_signal (&cnd1);
+  chopstx_mutex_unlock (&mtx);
+
+  wait_for (100*1000);
+  if (user_button ())
+    {
+      /* Wait button release.  */
+      while (user_button ())
+	wait_for (100*1000);
+
+      happy = 0;
+      goto do_text;
+    }
+
+  while (count++ < REPEAT_COUNT)
+    {
+      if (!logo_display ())
+	break;
+    do_text:
+      if (!text_display (happy))
+	break;
+    }
+
+  main_finished = 1;
+  chopstx_join (button_thd, NULL);
+  chopstx_join (led_thd, NULL);
+
+  setup_scr_sleepdeep ();
+  for (;;)
+    asm volatile ("wfi" : : : "memory");
+
+  return 0;
+}
+
+struct SCB
+{
+  volatile uint32_t CPUID;
+  volatile uint32_t ICSR;
+  volatile uint32_t VTOR;
+  volatile uint32_t AIRCR;
+  volatile uint32_t SCR;
+  volatile uint32_t CCR;
+  volatile uint8_t  SHP[12];
+  volatile uint32_t SHCSR;
+  volatile uint32_t CFSR;
+  volatile uint32_t HFSR;
+  volatile uint32_t DFSR;
+  volatile uint32_t MMFAR;
+  volatile uint32_t BFAR;
+  volatile uint32_t AFSR;
+  volatile uint32_t PFR[2];
+  volatile uint32_t DFR;
+  volatile uint32_t ADR;
+  volatile uint32_t MMFR[4];
+  volatile uint32_t ISAR[5];
+};
+
+#define SCS_BASE	(0xE000E000)
+#define SCB_BASE	(SCS_BASE +  0x0D00)
+static struct SCB *const SCB = ((struct SCB *const) SCB_BASE);
+
+#define SCB_SCR_SLEEPDEEP (1 << 2)
+
+struct PWR
+{
+  volatile uint32_t CR;
+  volatile uint32_t CSR;
+};
+#define PWR_CR_PDDS 0x0002
+#define PWR_CR_CWUF 0x0004
+
+#define PWR_BASE	(APBPERIPH_BASE + 0x00007000)
+#define PWR		((struct PWR *) PWR_BASE)
+
+static void setup_scr_sleepdeep (void)
+{
+  PWR->CR |= PWR_CR_CWUF;
+  PWR->CR |= PWR_CR_PDDS;
+  SCB->SCR |= SCB_SCR_SLEEPDEEP;
+}
--- a/example-fsm-55/debian-logo.txt
+++ b/example-fsm-55/debian-logo.txt
@@ -0,0 +1,594 @@
+.....
+.....
+.....
+.....
+.....
+
+.....
+.....
+..o..
+.....
+.....
+
+.....
+.....
+..o..
+...o.
+.....
+
+.....
+.....
+..o.o
+...o.
+.....
+
+.....
+....o
+..o.o
+...o.
+.....
+
+...o.
+....o
+..o.o
+...o.
+.....
+
+..oo.
+....o
+..o.o
+...o.
+.....
+
+.ooo.
+....o
+..o.o
+...o.
+.....
+
+.ooo.
+o...o
+..o.o
+...o.
+.....
+
+.ooo.
+o...o
+o.o.o
+...o.
+.....
+
+.ooo.
+o...o
+o.o.o
+o..o.
+.....
+
+.ooo.
+o...o
+o.o.o
+o..o.
+.o...
+
+.ooo.
+o...o
+o.o.o
+o..o.
+.o...
+
+.ooo.
+o...o
+o.oo.
+o....
+.oo..
+
+.ooo.
+o...o
+o.oo.
+o....
+.ooo.
+
+.oo..
+o..o.
+o.o..
+o....
+.oooo
+
+.oo..
+o..o.
+o.o..
+o...o
+.ooo.
+
+.oo..
+o.o..
+o.o.o
+o...o
+.ooo.
+
+.o...
+o.o.o
+o.o.o
+o...o
+.ooo.
+
+....o
+.o..o
+o.o.o
+o...o
+.ooo.
+
+...o.
+....o
+.oo.o
+o...o
+.ooo.
+
+.ooo.
+....o
+.oo.o
+o...o
+.ooo.
+
+oooo.
+....o
+.oo.o
+o...o
+.ooo.
+
+.ooo.
+o...o
+..o.o
+.o..o
+..oo.
+
+.ooo.
+o...o
+o.o.o
+..o.o
+...o.
+
+.ooo.
+o...o
+o.o.o
+o.o.o
+...o.
+
+.ooo.
+o...o
+o.o.o
+o..o.
+o....
+
+.ooo.
+o...o
+o.o.o
+o..o.
+.o...
+
+.ooo.
+o...o
+o.o.o
+o..o.
+.o...
+
+ooo.
+o..o
+o..o
+o..o
+ooo.
+
+.oo.
+o..o
+oooo
+o...
+.ooo
+
+o...
+o...
+oooo
+o..o
+ooo.
+
+o
+.
+o
+o
+o
+
+.oo.
+...o
+.ooo
+o..o
+oooo
+
+....
+oooo
+o..o
+o..o
+o..o
+
+..... 00
+..... 00
+..... 00
+..... 00
+..... 00
+
+..... 00
+..... 00
+..o.. 04
+..... 00
+..... 00
+
+..... 00
+..... 00
+..o.. 04
+...o. 02
+..... 00
+
+..... 00
+..... 00
+..o.o 05
+...o. 02
+..... 00
+
+..... 00
+....o 01
+..o.o 05
+...o. 02
+..... 00
+
+...o. 02
+....o 01
+..o.o 05
+...o. 02
+..... 00
+
+..oo. 06
+....o 01
+..o.o 05
+...o. 02
+..... 00
+
+.ooo. 0e
+....o 01
+..o.o 05
+...o. 02
+..... 00
+
+.ooo. 0e
+o...o 11
+..o.o 05
+...o. 02
+..... 00
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+...o. 02
+..... 00
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o..o. 12
+..... 00
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o..o. 12
+.o... 08
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o..o. 12
+.o... 08
+
+.ooo. 0e
+o...o 11
+o.oo. 16
+o.... 10
+.oo.. 0c
+
+.ooo. 0e
+o...o 11
+o.oo. 16
+o.... 10
+.ooo. 0e
+
+.oo.. 0c
+o..o. 12
+o.o.. 14
+o.... 10
+.oooo 0f
+
+.oo.. 0c
+o..o. 12
+o.o.. 14
+o...o 11
+.ooo. 0e
+
+.o... 08
+o.o.. 14
+o.o.o 15
+o...o 11
+.ooo. 0e
+
+.o... 08
+o.o.o 15
+o.o.o 15
+o...o 11
+.ooo. 0e
+
+...o. 02
+.o..o 09
+o.o.o 15
+o...o 11
+.ooo. 0e
+
+....o 01
+.o..o 09
+o.o.o 15
+o...o 11
+.ooo. 0e
+
+...o. 02
+.o..o 09
+o.o.o 15
+o...o 11
+.ooo. 0e
+
+..oo. 06
+....o 01
+.oo.o 0d
+o...o 11
+.ooo. 0e
+
+.ooo. 0e
+....o 01
+.oo.o 0d
+o...o 11
+.ooo. 0e
+
+oooo. 1e
+....o 01
+.oo.o 0d
+o...o 11
+.ooo. 0e
+
+.ooo. 0e
+o...o 11
+..o.o 05
+.o..o 09
+..oo. 06
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+..o.o 05
+...o. 02
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o.o.o 15
+...o. 02
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o..o. 12
+o.... 10
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o..o. 12
+.o... 08
+
+.ooo. 0e
+o...o 11
+o.o.o 15
+o..o. 12
+.o... 08
+
+ooo.
+o..o
+o..o
+o..o
+ooo.
+
+.oo.
+o..o
+oooo
+o...
+.ooo
+
+o...
+o...
+oooo
+o..o
+ooo.
+
+o
+.
+o
+o
+o
+
+.oo.
+...o
+.ooo
+o..o
+.ooo
+
+o.oo
+oo.o
+o..o
+o..o
+o..o
+
+
+00
+00
+00
+00
+00
+  
+00
+00
+04
+00
+00
+  
+00
+00
+04
+02
+00
+  
+00
+00
+05
+02
+00
+  
+00
+01
+05
+02
+00
+  
+02
+01
+05
+02
+00
+  
+06
+01
+05
+02
+00
+  
+0e
+01
+05
+02
+00
+  
+0e
+11
+05
+02
+00
+  
+0e
+11
+15
+02
+00
+  
+0e
+11
+15
+12
+00
+  
+0e
+11
+15
+12
+08
+  
+0e
+11
+15
+12
+08
+  
+0e
+11
+16
+10
+0e
+  
+0c
+12
+14
+11
+0e
+  
+0c
+14
+15
+11
+0e
+  
+08
+15
+15
+11
+0e
+  
+02
+09
+15
+11
+0e
+  
+06
+01
+0d
+11
+0e
+  
+0e
+01
+1d
+11
+0e
+  
+1e
+01
+0d
+11
+0e
+  
+0e
+11
+05
+09
+0e
+  
+0e
+11
+15
+05
+06
+  
+0e
+11
+15
+15
+02
+  
+0e
+11
+15
+13
+08
+  
+0e
+11
+15
+12
+08
+  
+0e
+11
+15
+12
+08
--- a/example-fsm-55/gnu.txt
+++ b/example-fsm-55/gnu.txt
@@ -0,0 +1,54 @@
+o...o
+o.o.o
+o.o.o
+o.o.o
+.o.o.
+
+o..
+o..
+ooo
+o.o
+o.o
+
+.o..
+oooo
+.o..
+.o..
+..oo
+
+.oo
+.oo
+o..
+...
+...
+
+....
+.ooo
+o...
+.oo.
+...o
+ooo.
+
+o..o
+o..o
+o..o
+o..o
+.oo.
+
+.oo.
+o..o
+..o.
+....
+..o.
+
+....
+.oo.
+o..o
+o..o
+.oo.
+
+o...o
+.o.o.
+..o..
+.o.o.
+o...o
--- a/example-fsm-55/hacker-emblem.ld
+++ b/example-fsm-55/hacker-emblem.ld
@@ -0,0 +1,125 @@
+/*
+ * ST32F0 memory setup.
+ */
+__main_stack_size__     = 0x0100;  /* Exception handlers     */
+__process0_stack_size__  = 0x0100; /* Main program           */
+__process1_stack_size__  = 0x0100; /* first thread program */
+__process2_stack_size__  = 0x0100; /* second thread program */
+__process3_stack_size__  = 0x0100; /* third thread program */
+
+MEMORY
+{
+    flash  : org = 0x08000000, len = 16k
+    ram : org = 0x20000000, len = 4k
+}
+
+__ram_start__           = ORIGIN(ram);
+__ram_size__            = 4k;
+__ram_end__             = __ram_start__ + __ram_size__;
+
+SECTIONS
+{
+    . = 0;
+
+    _text = .;
+
+    .text : ALIGN(16) SUBALIGN(16)
+    {
+	KEEP(*(.vectors))
+	. = ALIGN(16);
+        *(.text.startup.*)
+        *(.text)
+        *(.text.*)
+        *(.rodata)
+        *(.rodata.*)
+        *(.glue_7t)
+        *(.glue_7)
+        *(.gcc*)
+	. = ALIGN(8);
+    } > flash
+
+    /DISCARD/ :
+    {
+        *(.startup.vectors)
+        *(.bss.startup.0)
+    }
+
+    .ARM.extab : {*(.ARM.extab* .gnu.linkonce.armextab.*)} > flash
+
+    .ARM.exidx : {
+        PROVIDE(__exidx_start = .);
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+        PROVIDE(__exidx_end = .);
+     } > flash
+
+    .eh_frame_hdr : {*(.eh_frame_hdr)} > flash
+
+    .eh_frame : ONLY_IF_RO {*(.eh_frame)} > flash
+
+    .textalign : ONLY_IF_RO { . = ALIGN(8); } > flash
+
+    _etext = .;
+    _textdata = _etext;
+
+    .process_stack :
+    {
+        . = ALIGN(8);
+        __process3_stack_base__ = .;
+        . += __process3_stack_size__;
+        . = ALIGN(8);
+        __process3_stack_end__ = .;
+        __process2_stack_base__ = .;
+        . += __process2_stack_size__;
+        . = ALIGN(8);
+        __process2_stack_end__ = .;
+        __process1_stack_base__ = .;
+        . += __process1_stack_size__;
+        . = ALIGN(8);
+        __process1_stack_end__ = .;
+        __process0_stack_base__ = .;
+        . += __process0_stack_size__;
+        . = ALIGN(8);
+        __process0_stack_end__ = .;
+    } > ram
+
+    .main_stack :
+    {
+        . = ALIGN(8);
+        __main_stack_base__ = .;
+        . += __main_stack_size__;
+        . = ALIGN(8);
+        __main_stack_end__ = .;
+    } > ram
+
+    .data :
+    {
+        . = ALIGN(4);
+        PROVIDE(_data = .);
+        *(.data)
+        . = ALIGN(4);
+        *(.data.*)
+        . = ALIGN(4);
+        *(.ramtext)
+        . = ALIGN(4);
+        PROVIDE(_edata = .);
+    } > ram AT > flash
+
+    .bss :
+    {
+        . = ALIGN(4);
+        PROVIDE(_bss_start = .);
+        *(.bss)
+        . = ALIGN(4);
+        *(.bss.*)
+        . = ALIGN(4);
+        *(COMMON)
+        . = ALIGN(4);
+        PROVIDE(_bss_end = .);
+    } > ram
+
+    PROVIDE(end = .);
+    _end            = .;
+}
+
+__heap_base__   = _end;
+__heap_end__    = __ram_end__;
--- a/example-fsm-55/hh.c
+++ b/example-fsm-55/hh.c
@@ -0,0 +1,461 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chopstx.h>
+
+#include "board.h"
+
+static uint8_t main_finished;
+
+#define PERIPH_BASE	0x40000000
+#define APBPERIPH_BASE   PERIPH_BASE
+#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
+#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
+#define AHB2PERIPH_BASE	(PERIPH_BASE + 0x08000000)
+
+struct GPIO {
+  volatile uint32_t MODER;
+  volatile uint16_t OTYPER;
+  uint16_t dummy0;
+  volatile uint32_t OSPEEDR;
+  volatile uint32_t PUPDR;
+  volatile uint16_t IDR;
+  uint16_t dummy1;
+  volatile uint16_t ODR;
+  uint16_t dummy2;
+  volatile uint16_t BSRR;
+  uint16_t dummy3;
+  volatile uint32_t LCKR;
+  volatile uint32_t AFR[2];
+  volatile uint16_t BRR;
+  uint16_t dummy4;
+};
+#define GPIOA_BASE	(AHB2PERIPH_BASE + 0x0000)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOF_BASE	(AHB2PERIPH_BASE + 0x1400)
+#define GPIOF		((struct GPIO *) GPIOF_BASE)
+
+static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
+static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
+
+static chopstx_mutex_t mtx;
+static chopstx_cond_t cnd0, cnd1;
+
+#define BUTTON_PUSHED 1
+static uint8_t button_state;
+
+static uint8_t
+user_button (void)
+{
+  return button_state;
+}
+
+
+static uint8_t l_data[5];
+#define LED_FULL ((0x1f << 20)|(0x1f << 15)|(0x1f << 10)|(0x1f << 5)|0x1f)
+
+static void
+set_led_display (uint32_t data)
+{
+  l_data[0] = (data >>  0) & 0x1f;
+  l_data[1] = (data >>  5) & 0x1f;
+  l_data[2] = (data >> 10) & 0x1f;
+  l_data[3] = (data >> 15) & 0x1f;
+  l_data[4] = (data >> 20) & 0x1f;
+}
+
+static void
+scroll_led_display (uint8_t row)
+{
+  l_data[0] = (l_data[0] << 1) | ((row >> 0) & 1);
+  l_data[1] = (l_data[1] << 1) | ((row >> 1) & 1);
+  l_data[2] = (l_data[2] << 1) | ((row >> 2) & 1);
+  l_data[3] = (l_data[3] << 1) | ((row >> 3) & 1);
+  l_data[4] = (l_data[4] << 1) | ((row >> 4) & 1);
+}
+
+
+static void
+wait_for (uint32_t usec)
+{
+  chopstx_usec_wait (usec);
+}
+
+static void
+led_prepare_row (uint8_t col)
+{
+  uint16_t data = 0x1f;
+
+  data |= ((l_data[0] & (1 << col)) ? 1 : 0) << 5;
+  data |= ((l_data[1] & (1 << col)) ? 1 : 0) << 6;
+  data |= ((l_data[2] & (1 << col)) ? 1 : 0) << 7;
+  data |= ((l_data[3] & (1 << col)) ? 1 : 0) << 9;
+  data |= ((l_data[4] & (1 << col)) ? 1 : 0) << 10;
+  GPIO_LED->ODR = data;
+}
+
+
+static void
+led_enable_column (uint8_t col)
+{
+  GPIO_LED->BRR = (1 << col);
+}
+
+static void *
+led (void *arg)
+{
+  (void)arg;
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_wait (&cnd0, &mtx);
+  chopstx_mutex_unlock (&mtx);
+
+  while (!main_finished)
+    {
+      int i;
+
+      for (i = 0; i < 5; i++)
+	{
+	  led_prepare_row (i);
+	  led_enable_column (i);
+	  wait_for (1000);
+	}
+    }
+
+  GPIO_LED->ODR = 0x0000;	/* Off all LEDs.  */
+  GPIO_LED->OSPEEDR = 0;
+  GPIO_LED->OTYPER = 0;
+  GPIO_LED->MODER = 0;		/* Input mode.  */
+  GPIO_OTHER->PUPDR = 0x0000;	/* No pull-up.  */
+
+  return NULL;
+}
+
+
+static uint8_t get_button_sw (void) { return (GPIO_OTHER->IDR & 1) == 0; }
+
+static void *
+button (void *arg)
+{
+  uint8_t last_button = 0;
+
+  (void)arg;
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_wait (&cnd1, &mtx);
+  chopstx_mutex_unlock (&mtx);
+
+  while (!main_finished)
+    {
+      uint8_t button = get_button_sw ();
+
+      if (last_button == button && button != button_state)
+	{
+	  wait_for (1000);
+	  button = get_button_sw ();
+	  if (last_button == button)
+	    button_state = button;
+	}
+
+      wait_for (2000);
+      last_button = button;
+    }
+
+  return NULL;
+}
+
+#define PRIO_LED 3
+#define PRIO_BUTTON 2
+
+extern uint8_t __process1_stack_base__, __process1_stack_size__;
+extern uint8_t __process2_stack_base__, __process2_stack_size__;
+
+const uint32_t __stackaddr_led = (uint32_t)&__process1_stack_base__;
+const size_t __stacksize_led = (size_t)&__process1_stack_size__;
+
+const uint32_t __stackaddr_button = (uint32_t)&__process2_stack_base__;
+const size_t __stacksize_button = (size_t)&__process2_stack_size__;
+
+#define DATA55(x0,x1,x2,x3,x4) (x0<<20)|(x1<<15)|(x2<<10)|(x3<< 5)|(x4<< 0)
+#define SIZE55(img) (sizeof (img) / sizeof (uint32_t))
+
+static uint32_t l55[] = {
+  DATA55 (0x08, 0x04, 0x1c, 0x00, 0x00),
+  DATA55 (0x00, 0x14, 0x0c, 0x08, 0x00),
+  DATA55 (0x00, 0x04, 0x14, 0x0c, 0x00),
+  DATA55 (0x00, 0x08, 0x06, 0x0c, 0x00),
+  DATA55 (0x00, 0x04, 0x02, 0x0e, 0x00),
+  DATA55 (0x00, 0x00, 0x0a, 0x06, 0x04),
+  DATA55 (0x00, 0x00, 0x02, 0x0a, 0x06),
+  DATA55 (0x00, 0x00, 0x04, 0x03, 0x06),
+  DATA55 (0x00, 0x00, 0x02, 0x01, 0x07),
+  DATA55 (0x02, 0x00, 0x00, 0x05, 0x03),
+  DATA55 (0x03, 0x00, 0x00, 0x01, 0x05),
+  DATA55 (0x03, 0x00, 0x00, 0x02, 0x11),
+  DATA55 (0x13, 0x00, 0x00, 0x01, 0x10),
+  DATA55 (0x11, 0x01, 0x00, 0x00, 0x12),
+  DATA55 (0x12, 0x11, 0x00, 0x00, 0x10),
+  DATA55 (0x18, 0x11, 0x00, 0x00, 0x01),
+  DATA55 (0x08, 0x19, 0x00, 0x00, 0x10),
+  DATA55 (0x09, 0x18, 0x10, 0x00, 0x00),
+  DATA55 (0x08, 0x09, 0x18, 0x00, 0x00),
+  DATA55 (0x10, 0x0c, 0x18, 0x00, 0x00),
+};
+
+#define DATA55V(x0,x1,x2,x3,x4) (x0<<0)|(x1<<5)|(x2<<10)|(x3<< 15)|(x4<< 20)
+
+#define CHAR_SPC 0
+#define CHAR_H   1
+#define CHAR_A   2
+#define CHAR_P   3
+#define CHAR_Y   4
+#define CHAR_C   5
+#define CHAR_K   6
+#define CHAR_I   7
+#define CHAR_N   8
+#define CHAR_G   9
+#define CHAR_EXC 10
+#define CHAR_W   11
+#define CHAR_h   12
+#define CHAR_t   13
+#define CHAR_AP  14
+#define CHAR_s   15
+#define CHAR_U   16
+#define CHAR_QT  17
+#define CHAR_o   18
+#define CHAR_X   19
+
+static uint8_t hh[] = {
+  CHAR_H, CHAR_A, CHAR_P, CHAR_P, CHAR_Y,
+  CHAR_SPC,
+  CHAR_H, CHAR_A, CHAR_C, CHAR_K, CHAR_I, CHAR_N, CHAR_G,
+  CHAR_EXC,
+  CHAR_SPC, CHAR_SPC, CHAR_SPC,
+};
+
+static uint8_t gnu[] = {
+  CHAR_W, CHAR_h, CHAR_A, CHAR_t, CHAR_AP, CHAR_s, CHAR_SPC,
+  CHAR_G, CHAR_N, CHAR_U, CHAR_QT, 
+  CHAR_SPC, CHAR_SPC,
+  CHAR_G, CHAR_N, CHAR_U, CHAR_AP, CHAR_s, CHAR_SPC,
+  CHAR_N, CHAR_o, CHAR_t, CHAR_SPC,
+  CHAR_U, CHAR_N, CHAR_I, CHAR_X,
+  CHAR_EXC,
+  CHAR_SPC, CHAR_SPC,
+};
+
+struct { uint8_t width; uint32_t data; } chargen[] = {
+  { 3, 0 },						/* SPACE */
+  { 4, DATA55V (0x1f, 0x04, 0x04, 0x1f, 0x00) },	/* H */
+  { 3, DATA55V (0x17, 0x15, 0x0f, 0x00, 0x00) },	/* A */
+  { 4, DATA55V (0x1f, 0x14, 0x14, 0x08, 0x00) },	/* P */
+  { 4, DATA55V (0x19, 0x05, 0x05, 0x1e, 0x00) },	/* Y */
+  { 4, DATA55V (0x0e, 0x11, 0x11, 0x0a, 0x00) },	/* C */
+  { 4, DATA55V (0x1f, 0x04, 0x0c, 0x13, 0x00) },	/* K */
+  { 3, DATA55V (0x11, 0x1f, 0x11, 0x00, 0x00) },	/* I */
+  { 4, DATA55V (0x1f, 0x08, 0x06, 0x1f, 0x00) },	/* N */
+  { 4, DATA55V (0x0e, 0x11, 0x15, 0x07, 0x00) },	/* G */
+  { 2, DATA55V (0x1d, 0x1c, 0x00, 0x00, 0x00) },	/* ! */
+  { 5, DATA55V (0x1e, 0x01, 0x0e, 0x01, 0x1e) },	/* W */
+  { 3, DATA55V (0x1f, 0x04, 0x07, 0x00, 0x00) },	/* h */
+  { 4, DATA55V (0x08, 0x1e, 0x09, 0x09, 0x00) },	/* t */
+  { 3, DATA55V (0x04, 0x18, 0x18, 0x00, 0x00) },	/* ' */
+  { 4, DATA55V (0x09, 0x15, 0x15, 0x12, 0x00) },	/* s */
+  { 4, DATA55V (0x1e, 0x01, 0x01, 0x1e, 0x00) },	/* U */
+  { 4, DATA55V (0x08, 0x10, 0x15, 0x08, 0x00) },	/* ? */
+  { 4, DATA55V (0x06, 0x09, 0x09, 0x06, 0x00) },	/* o */
+  { 5, DATA55V (0x11, 0x0a, 0x04, 0x0a, 0x11) },	/* X */
+  { 4, DATA55V (0x1f, 0x11, 0x11, 0x0e, 0x00) },	/* D */
+  { 4, DATA55V (0x0e, 0x15, 0x15, 0x0d, 0x00) },	/* e */
+  { 4, DATA55V (0x1f, 0x05, 0x05, 0x06, 0x00) },	/* b */
+  { 1, DATA55V (0x17, 0x00, 0x00, 0x00, 0x00) },	/* i */
+  { 4, DATA55V (0x02, 0x15, 0x15, 0x0f, 0x00) },	/* a */
+  { 4, DATA55V (0x0f, 0x08, 0x08, 0x0f, 0x00) },	/* n */
+};
+
+
+#define REPEAT_COUNT 10
+
+static int
+life_display (void)
+{
+  unsigned int i;
+  uint8_t count = 0;
+  uint8_t state = 0;
+
+  while (count++ < REPEAT_COUNT)
+    for (i = 0; i < SIZE55 (l55); i++)
+      {
+	if (user_button ())
+	  {
+	    set_led_display (LED_FULL);
+	    state = 1;
+	  }
+	else if (state == 1)
+	  return 0;
+	else
+	  set_led_display (l55[i]);
+	wait_for (350*1000);
+      }
+
+  return 1;
+}
+
+
+static int
+text_display (uint8_t kind)
+{
+  unsigned int i, j;
+  uint8_t *text;
+  uint8_t len;
+  uint8_t count = 0;
+  uint8_t state = 0;
+
+  if (kind)
+    {
+      text = hh;
+      len = sizeof (hh);
+    }
+  else
+    {
+      text = gnu;
+      len = sizeof (gnu);
+    }
+
+  set_led_display (0);
+  while (count++ < REPEAT_COUNT)
+    for (i = 0; i < len; i++)
+      {
+	for (j = 0; j < chargen[text[i]].width; j++)
+	  {
+	    if (user_button ())
+	      {
+		set_led_display (LED_FULL);
+		state = 1;
+	      }
+	    else if (state == 1)
+	      return 0;
+	    else
+	      scroll_led_display ((chargen[text[i]].data >> j * 5) & 0x1f);
+	    wait_for (120*1000);
+	  }
+
+	if (user_button ())
+	  {
+	    set_led_display (LED_FULL);
+	    state = 1;
+	  }
+	else if (state == 1)
+	  return 0;
+	else
+	  scroll_led_display (0);
+	wait_for (120*1000);
+      }
+
+  return 1;
+}
+
+
+static void setup_scr_sleepdeep (void);
+
+int
+main (int argc, const char *argv[])
+{
+  chopstx_t led_thd;
+  chopstx_t button_thd;
+  uint8_t happy = 1;
+  (void)argc;
+  (void)argv;
+
+  chopstx_mutex_init (&mtx);
+  chopstx_cond_init (&cnd0);
+  chopstx_cond_init (&cnd1);
+
+  led_thd = chopstx_create (PRIO_LED, __stackaddr_led,
+			    __stacksize_led, led, NULL);
+  button_thd = chopstx_create (PRIO_BUTTON, __stackaddr_button,
+			       __stacksize_button, button, NULL);
+
+  chopstx_usec_wait (200*1000);
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_signal (&cnd0);
+  chopstx_cond_signal (&cnd1);
+  chopstx_mutex_unlock (&mtx);
+
+  wait_for (100*1000);
+  if (user_button ())
+    {
+      /* Wait button release.  */
+      while (user_button ())
+	wait_for (100*1000);
+
+      happy = 0;
+      goto do_text;
+    }
+
+  while (1)
+    {
+      if (life_display ())
+	break;
+    do_text:
+      if (text_display (happy))
+	break;
+    }
+
+  main_finished = 1;
+  chopstx_join (button_thd, NULL);
+  chopstx_join (led_thd, NULL);
+
+  setup_scr_sleepdeep ();
+  for (;;)
+    asm volatile ("wfi" : : : "memory");
+
+  return 0;
+}
+
+struct SCB
+{
+  volatile uint32_t CPUID;
+  volatile uint32_t ICSR;
+  volatile uint32_t VTOR;
+  volatile uint32_t AIRCR;
+  volatile uint32_t SCR;
+  volatile uint32_t CCR;
+  volatile uint8_t  SHP[12];
+  volatile uint32_t SHCSR;
+  volatile uint32_t CFSR;
+  volatile uint32_t HFSR;
+  volatile uint32_t DFSR;
+  volatile uint32_t MMFAR;
+  volatile uint32_t BFAR;
+  volatile uint32_t AFSR;
+  volatile uint32_t PFR[2];
+  volatile uint32_t DFR;
+  volatile uint32_t ADR;
+  volatile uint32_t MMFR[4];
+  volatile uint32_t ISAR[5];
+};
+
+#define SCS_BASE	(0xE000E000)
+#define SCB_BASE	(SCS_BASE +  0x0D00)
+static struct SCB *const SCB = ((struct SCB *const) SCB_BASE);
+
+#define SCB_SCR_SLEEPDEEP (1 << 2)
+
+struct PWR
+{
+  volatile uint32_t CR;
+  volatile uint32_t CSR;
+};
+#define PWR_CR_PDDS 0x0002
+#define PWR_CR_CWUF 0x0004
+
+#define PWR_BASE	(APBPERIPH_BASE + 0x00007000)
+#define PWR		((struct PWR *) PWR_BASE)
+
+static void setup_scr_sleepdeep (void)
+{
+  PWR->CR |= PWR_CR_CWUF;
+  PWR->CR |= PWR_CR_PDDS;
+  SCB->SCR |= SCB_SCR_SLEEPDEEP;
+}
--- a/example-fsm-55/hh.txt
+++ b/example-fsm-55/hh.txt
@@ -0,0 +1,59 @@
+o..o
+o..o
+oooo
+o..o
+o..o
+
+oo.
+..o
+ooo
+o.o
+ooo
+
+ooo.
+o..o
+ooo.
+o...
+o...
+
+o..o
+o..o
+.ooo
+...o
+ooo.
+
+.oo.
+o..o
+o...
+o..o
+.oo.
+
+o..o
+o.o.
+ooo.
+o..o
+o..o
+
+ooo
+.o.
+.o.
+.o.
+ooo
+
+o..o
+oo.o
+o.oo
+o.oo
+o..o
+
+.oo.
+o...
+o.oo
+o..o
+.ooo
+
+oo
+oo
+oo
+..
+o.
--- a/example-fsm-55/hiroshi-ayumi.c
+++ b/example-fsm-55/hiroshi-ayumi.c
@@ -0,0 +1,385 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <chopstx.h>
+
+#include "board.h"
+
+#define PERIPH_BASE	0x40000000
+#define APBPERIPH_BASE   PERIPH_BASE
+#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
+#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
+#define AHB2PERIPH_BASE	(PERIPH_BASE + 0x08000000)
+
+struct GPIO {
+  volatile uint32_t MODER;
+  volatile uint16_t OTYPER;
+  uint16_t dummy0;
+  volatile uint32_t OSPEEDR;
+  volatile uint32_t PUPDR;
+  volatile uint16_t IDR;
+  uint16_t dummy1;
+  volatile uint16_t ODR;
+  uint16_t dummy2;
+  volatile uint16_t BSRR;
+  uint16_t dummy3;
+  volatile uint32_t LCKR;
+  volatile uint32_t AFR[2];
+  volatile uint16_t BRR;
+  uint16_t dummy4;
+};
+#define GPIOA_BASE	(AHB2PERIPH_BASE + 0x0000)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOF_BASE	(AHB2PERIPH_BASE + 0x1400)
+#define GPIOF		((struct GPIO *) GPIOF_BASE)
+
+#define GPIO_SPEAKER_PIN    1
+
+static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
+static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
+
+static chopstx_mutex_t mtx;
+static chopstx_cond_t cnd;
+
+static uint8_t
+user_button (void)
+{
+  return (GPIO_OTHER->IDR & 1) == 0;
+}
+
+static uint8_t l_data[5];
+
+static void
+set_led_display (uint32_t data)
+{
+  l_data[0] = (data >>  0) & 0x1f;
+  l_data[1] = (data >>  5) & 0x1f;
+  l_data[2] = (data >> 10) & 0x1f;
+  l_data[3] = (data >> 15) & 0x1f;
+  l_data[4] = (data >> 20) & 0x1f;
+}
+
+
+static void
+wait_for (uint32_t usec)
+{
+  chopstx_usec_wait (usec);
+}
+
+static void
+led_prepare_row (uint8_t col)
+{
+  uint16_t data = 0x1f;
+
+  data |= ((l_data[0] & (1 << col)) ? 1 : 0) << 5;
+  data |= ((l_data[1] & (1 << col)) ? 1 : 0) << 6;
+  data |= ((l_data[2] & (1 << col)) ? 1 : 0) << 7;
+  data |= ((l_data[3] & (1 << col)) ? 1 : 0) << 9;
+  data |= ((l_data[4] & (1 << col)) ? 1 : 0) << 10;
+  GPIO_LED->ODR = data;
+}
+
+static void
+led_enable_column (uint8_t col)
+{
+  GPIO_LED->BRR = (1 << col);
+}
+
+
+#define PRIO_LED 3
+
+extern uint8_t __process1_stack_base__, __process1_stack_size__;
+
+const uint32_t stackaddr_led = (uint32_t)&__process1_stack_base__;
+const size_t stacksize_led = (size_t)&__process1_stack_size__;
+
+static void *
+led (void *arg)
+{
+  (void)arg;
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_wait (&cnd, &mtx);
+  chopstx_mutex_unlock (&mtx);
+
+  while (1)
+    {
+      int i;
+
+      for (i = 0; i < 5; i++)
+	{
+	  led_prepare_row (i);
+	  led_enable_column (i);
+	  wait_for (1000);
+	}
+    }
+
+  return NULL;
+}
+
+
+#define PRIO_SPK 4
+extern uint8_t __process2_stack_base__, __process2_stack_size__;
+
+const uint32_t stackaddr_spk = (uint32_t)&__process2_stack_base__;
+const size_t stacksize_spk = (size_t)&__process2_stack_size__;
+
+static chopstx_mutex_t spk_mtx;
+static chopstx_cond_t spk_cnd;
+static chopstx_cond_t spk_cnd_no_tone;
+
+static uint8_t tone;
+#define NO_TONE 255
+
+
+static uint16_t tone_table[] = {
+  568, /* a = 880Hz */
+  /* 536, */
+  506, /* b */
+  478, /* c */
+  /* 451, */
+  426, /* d */
+  /* 402, */
+  379, /* e */
+  358, /* f*/
+  /* 338, */
+  319, /* g */
+  /* 301, */
+  284, /* A = 1760Hz */
+  /* 268 */
+  253, /* B */
+  239, /* C */
+};
+
+static void
+change_tone (uint8_t t)
+{
+  chopstx_mutex_lock (&spk_mtx);
+  tone = t;
+  chopstx_cond_signal (&spk_cnd_no_tone);
+  chopstx_cond_wait (&spk_cnd, &spk_mtx);
+  chopstx_mutex_unlock (&spk_mtx);
+}
+
+static void *
+spk (void *arg)
+{
+  (void)arg;
+
+  while (1)
+    {
+      uint8_t t;
+      uint16_t w;
+
+      chopstx_mutex_lock (&spk_mtx);
+      t = tone;
+      chopstx_cond_signal (&spk_cnd);
+      if (t == NO_TONE)
+	{
+	  chopstx_cond_wait (&spk_cnd_no_tone, &spk_mtx);
+	  t = tone;
+	}
+      chopstx_mutex_unlock (&spk_mtx);
+
+      w = tone_table[t]*5/3;
+      GPIO_OTHER->BSRR = (1 << GPIO_SPEAKER_PIN);
+      wait_for (w);
+      GPIO_OTHER->BRR = (1 << GPIO_SPEAKER_PIN);
+      wait_for (w);
+    }
+
+  return NULL;
+}
+
+
+#define PRIO_MUSIC 2
+extern uint8_t __process3_stack_base__, __process3_stack_size__;
+
+const uint32_t stackaddr_music = (uint32_t)&__process3_stack_base__;
+const size_t stacksize_music = (size_t)&__process3_stack_size__;
+
+#define C 0
+#define D 1
+#define E 2
+#define F 3
+#define G 4
+#define A 5
+#define B 6
+
+#if 0 /* twinkle stars */
+static const char *musical_score = 
+  "c4c4g4g4A4A4g2f4f4e4e4d4d4c2"
+  "g4g4f4f4e4e4d2g4g4f4f4e4e4d2"
+  "c4c4g4g4A4A4g2f4f4e4e4d4d4c2";
+#else /* tulip */
+static const char *musical_score = 
+  "c4d4e2c4d4e2g4e4d4c4d4e4d2"
+  "c4d4e2c4d4e2g4e4d4c4d4e4c2"
+  "g4g4e4g4A4A4g2e4e4d4d4c2";
+#endif
+
+static int get_t_and_l (char *tp, char *lp)
+{
+  static unsigned int i = 0;
+  char tl, ll;
+
+  tl = musical_score[i++];
+  ll = musical_score[i++];
+
+  if (tl >= 'a')
+    *tp = tl - 'a';
+  else
+    *tp = tl - 'A' + 7;
+
+  *lp = ll - '0';
+
+  if (i >= strlen (musical_score))
+    {
+      i = 0;
+      return 0;
+    }
+  else
+    return 1;
+}
+
+#define WAIT_FOR_NO_TONE (1000*20)
+#define WAIT_FOR_TONE (1000000*3/2)
+
+static void *
+music (void *arg)
+{
+  (void)arg;
+
+  chopstx_mutex_init (&spk_mtx);
+  chopstx_cond_init (&spk_cnd);
+  chopstx_cond_init (&spk_cnd_no_tone);
+
+  chopstx_create (PRIO_SPK, stackaddr_spk, stacksize_spk, spk, NULL);
+
+  while (1)
+    {
+      char t, l;
+      int r;
+
+      r = get_t_and_l (&t, &l);
+
+      change_tone (NO_TONE);
+      wait_for (WAIT_FOR_NO_TONE);
+      change_tone (t);
+      wait_for (WAIT_FOR_TONE / l);
+
+      if (!r)
+	{
+	  change_tone (NO_TONE);
+	  wait_for (WAIT_FOR_TONE * 3);
+	}
+    }
+
+  return NULL;
+}
+
+
+
+#define DATA55(x0,x1,x2,x3,x4) (x0<<20)|(x1<<15)|(x2<<10)|(x3<< 5)|(x4<< 0)
+#define SIZE55(img) (sizeof (img) / sizeof (uint32_t))
+
+static uint32_t image0[] = {
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x01,0x00,0x00,0x00),
+  DATA55 (0x01,0x03,0x01,0x01,0x00),
+  DATA55 (0x02,0x06,0x02,0x02,0x01),
+  DATA55 (0x05,0x0d,0x05,0x05,0x03),
+  DATA55 (0x0b,0x1a,0x0a,0x0a,0x06),
+  DATA55 (0x16,0x14,0x14,0x14,0x0c),
+  DATA55 (0x0d,0x08,0x09,0x08,0x19),
+  DATA55 (0x1b,0x11,0x12,0x10,0x13),
+  DATA55 (0x17,0x03,0x04,0x00,0x07),
+  DATA55 (0x0f,0x06,0x09,0x01,0x0e),
+  DATA55 (0x1e,0x0c,0x12,0x02,0x1c),
+  DATA55 (0x1d,0x19,0x05,0x05,0x18),
+  DATA55 (0x1a,0x12,0x0a,0x0a,0x11),
+  DATA55 (0x14,0x04,0x14,0x14,0x03),
+  DATA55 (0x08,0x08,0x08,0x09,0x06),
+  DATA55 (0x10,0x10,0x10,0x12,0x0c),
+  DATA55 (0x00,0x00,0x00,0x04,0x18),
+  DATA55 (0x00,0x00,0x00,0x08,0x10),
+  DATA55 (0x00,0x00,0x00,0x10,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+};
+
+static uint32_t image1[] = {
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x01,0x00,0x00,0x00,0x01),
+  DATA55 (0x03,0x00,0x00,0x01,0x03),
+  DATA55 (0x07,0x01,0x01,0x03,0x06),
+  DATA55 (0x0f,0x02,0x02,0x06,0x0c),
+  DATA55 (0x1f,0x05,0x05,0x0c,0x18),
+  DATA55 (0x1e,0x0a,0x0a,0x18,0x11),
+  DATA55 (0x1d,0x14,0x14,0x10,0x03),
+  DATA55 (0x1b,0x08,0x08,0x00,0x07),
+  DATA55 (0x17,0x11,0x11,0x01,0x0f),
+  DATA55 (0x0e,0x02,0x02,0x02,0x1f),
+  DATA55 (0x1c,0x04,0x04,0x04,0x1e),
+  DATA55 (0x19,0x08,0x09,0x08,0x1d),
+  DATA55 (0x13,0x10,0x13,0x10,0x1b),
+  DATA55 (0x07,0x00,0x07,0x00,0x17),
+  DATA55 (0x0f,0x00,0x0f,0x00,0x0f),
+  DATA55 (0x1e,0x00,0x1e,0x00,0x1e),
+  DATA55 (0x1c,0x00,0x1c,0x00,0x1c),
+  DATA55 (0x18,0x00,0x18,0x00,0x18),
+  DATA55 (0x10,0x00,0x10,0x00,0x10),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+  DATA55 (0x00,0x00,0x00,0x00,0x00),
+};
+
+int
+main (int argc, const char *argv[])
+{
+  uint8_t state = 0;
+
+  (void)argc;
+  (void)argv;
+
+  chopstx_mutex_init (&mtx);
+  chopstx_cond_init (&cnd);
+
+  chopstx_create (PRIO_LED, stackaddr_led, stacksize_led, led, NULL);
+  chopstx_create (PRIO_MUSIC, stackaddr_music, stacksize_music, music, NULL);
+
+  chopstx_usec_wait (200*1000);
+
+  chopstx_mutex_lock (&mtx);
+  chopstx_cond_signal (&cnd);
+  chopstx_mutex_unlock (&mtx);
+
+  while (1)
+    {
+      unsigned int i;
+
+      if (state)
+	for (i = 0; i < SIZE55 (image1); i++)
+	  {
+	    if (user_button ())
+	      state = 0;
+	    set_led_display (image1[i]);
+	    wait_for (200*1000);
+	  }
+      else
+	for (i = 0; i < SIZE55 (image0); i++)
+	  {
+	    if (user_button ())
+	      state = 1;
+	    set_led_display (image0[i]);
+	    wait_for (200*1000);
+	  }
+    }
+
+  return 0;
+}
--- a/example-fsm-55/l55.txt
+++ b/example-fsm-55/l55.txt
@@ -0,0 +1,119 @@
+_*___  08
+__*__  04
+***__  1c
+_____  00
+_____  00
+
+_____  00
+*_*__  14
+_**__  0c
+_*___  08
+_____  00
+
+_____  00
+__*__  04
+*_*__  14
+_**__  0c
+_____  00
+
+_____  00
+_*__   08
+__**_  06
+_**__  0c
+_____  00
+
+_____  00
+__*__  04
+___*_  02
+_***_  0e
+_____  00
+
+_____  00
+_____  00
+_*_*_  0a
+__**_  06
+__*__  04
+
+_____  00
+_____  00
+___*_  02
+_*_*_  0a
+__**_  06
+
+_____  00
+_____  00
+__*__  04
+___**  03
+__**_  06
+
+_____  00
+_____  00
+ __*_  02
+____*  01
+__***  07
+
+___*_  02
+_____  00
+_____  00
+__*_*  05
+___**  03
+
+___**  03
+_____  00
+_____  00
+____*  01
+__*_*  05
+
+___**  03
+_____  00
+_____  00
+_ _*_  02
+*___*  11
+
+*__**  13
+_____  00
+_____  00
+____*  01
+*____  10
+
+*___*  11
+____*  01
+_____  00
+_____  00
+*__*_  12
+
+*__*_  12
+*___*  11
+_____  00
+_____  00
+*____  10
+
+**___  18
+*___*  11
+_____  00
+_____  00
+____*  01
+
+_*___  08
+**__*  19
+_____  00
+_____  00
+*____  10
+
+_*__*  09
+**___  18
+*____  10
+_____  00
+_____  00
+
+_*___  08
+_*__*  09
+**___  18
+_____  00
+_____  00
+
+*____  10
+_**__  0c
+**___  18
+_____  00
+_____  00
--- a/example-fsm-55/name.txt
+++ b/example-fsm-55/name.txt
@@ -0,0 +1,287 @@
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+____* 01
+_____ 00
+_____ 00
+_____ 00
+
+____* 01
+___** 03
+____* 01
+____* 01
+_____ 00
+
+___*_ 02
+__**_ 06
+___*_ 02
+___*_ 02
+____* 01
+
+__*_* 05
+_**_* 0d
+__*_* 05
+__*_* 05
+___** 03
+
+_*_** 0b
+**_*_ 1a
+_*_*_ 0a
+_*_*_ 0a
+__**_ 06
+
+*_**_ 16
+*_*__ 14
+*_*__ 14
+*_*__ 14
+_**__ 0c
+
+_**_* 0d
+_*___ 08
+_*__* 09
+_*___ 08
+**__* 19
+
+**_** 1b
+*___* 11
+*__*_ 12
+*____ 10
+*__** 13
+
+*_*** 17
+___** 03
+__*__ 04
+_____ 00
+__*** 07
+
+_**** 0f
+__**_ 06
+_*__* 09
+____* 01
+_***_ 0e
+
+****_ 1e
+_**__ 0c
+*__*_ 12
+___*_ 02
+***__ 1c
+
+***_* 1d
+**__* 19
+__*_* 05
+__*_* 05
+**___ 18
+
+**_*_ 1a
+*__*_ 12
+_*_*_ 0a
+_*_*_ 0a
+*___* 11
+
+*_*__ 14
+__*__ 04
+*_*__ 14
+*_*__ 14
+___** 03
+
+_*___ 08
+_*___ 08
+_*___ 08
+_*__* 09
+__**_ 06
+
+*____ 10
+*____ 10
+*____ 10
+*__*_ 12
+_**__ 0c
+
+_____ 00
+_____ 00
+_____ 00
+__*__ 04
+**___ 18
+
+_____ 00
+_____ 00
+_____ 00
+_*___ 08
+*____ 10
+
+_____ 00
+_____ 00
+_____ 00
+*____ 10
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+____* 01
+_____ 00
+_____ 00
+_____ 00
+____* 01
+
+___** 03
+_____ 00
+_____ 00
+____* 01
+___** 03
+
+__*** 07
+____* 01
+____* 01
+___** 03
+__**_ 06
+
+_**** 0f
+___*_ 02
+___*_ 02
+__**_ 06
+_**__ 0c
+
+***** 1f
+__*_* 05
+__*_* 05
+_**__ 0c
+**___ 18
+
+****_ 1e
+_*_*_ 0a
+_*_*_ 0a
+**___ 18
+*___* 11
+
+***_* 1d
+*_*__ 14
+*_*__ 14
+*____ 10
+___** 03
+
+**_** 1b
+_*___ 08
+_*___ 08
+_____ 00
+__*** 07
+
+*_*** 17
+*___* 11
+*___* 11
+____* 01
+_**** 0f
+
+_***_ 0e
+___*_ 02
+___*_ 02
+___*_ 02
+***** 1f
+
+***__ 1c
+__*__ 04
+__*__ 04
+__*__ 04
+****_ 1e
+
+**__* 19
+_*___ 08
+_*__* 09
+_*___ 08
+***_* 1d
+
+*__** 13
+*____ 10
+*__** 13
+*____ 10
+**_** 1b
+
+__*** 07
+_____ 00
+__*** 07
+_____ 00
+*_*** 17
+
+_**** 0f
+_____ 00
+_**** 0f
+_____ 00
+_**** 0f
+
+****_ 1e
+_____ 00
+****_ 1e
+_____ 00
+****_ 1e
+
+***__ 1c
+_____ 00
+***__ 1c
+_____ 00
+***__ 1c
+
+**___ 18
+_____ 00
+**___ 18
+_____ 00
+**___ 18
+
+*____ 10
+_____ 00
+*____ 10
+_____ 00
+*____ 10
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+
+_____ 00
+_____ 00
+_____ 00
+_____ 00
+_____ 00
--- a/example-fsm-55/stlink-v2.cfg
+++ b/example-fsm-55/stlink-v2.cfg
@@ -0,0 +1,12 @@
+# Contributed by Kiwamu Okabe
+
+source [find interface/stlink-v2.cfg]
+transport select hla_swd
+
+# The STM32F030F4P6 is a *tightly* constrained chip; the work area size must be
+# similarly constrained.
+set WORKAREASIZE 0x1000
+source [find target/stm32f0x.cfg]
+
+# use hardware reset, connect under reset
+reset_config srst_only srst_nogate connect_assert_srst
--- a/example-fsm-55/sys.c
+++ b/example-fsm-55/sys.c
@@ -0,0 +1,118 @@
+/*
+ * sys.c - No system routines, but only RESET handler for STM32F030.
+ *
+ * Copyright (C) 2015 Flying Stone Technology
+ * Author: NIIBE Yutaka <gniibe@fsij.org>
+ *
+ * Copying and distribution of this file, with or without modification,
+ * are permitted in any medium without royalty provided the copyright
+ * notice and this notice are preserved.  This file is offered as-is,
+ * without any warranty.
+ *
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+
+static void __attribute__ ((naked))
+reset (void)
+{
+  asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
+		"mov	r0, pc\n\t"	/* r0 = PC & ~0x0fff */
+		"mov	r1, #0x10\n\t"
+		"lsl	r1, #8\n\t"
+		"sub	r1, r1, #1\n\t"
+		"bic	r0, r0, r1\n\t"
+		"ldr	r2, [r0]\n\t"
+		"msr	MSP, r2\n\t"	/* Main (exception handler) stack. */
+		"b	entry\n\t"
+		: /* no output */ : /* no input */ : "memory");
+  /* Never reach here. */
+}
+
+extern uint8_t __main_stack_end__;
+extern void svc (void);
+extern void preempt (void);
+extern void chx_timer_expired (void);
+extern void chx_handle_intr (void);
+
+static void nmi (void)
+{
+  for (;;);
+}
+
+static void __attribute__ ((naked))
+hard_fault (void)
+{
+  register uint32_t primask;
+
+  asm ("mrs	%0, PRIMASK" : "=r" (primask));
+
+  if (primask)
+    asm volatile ("b	svc");
+  else
+    for (;;);
+}
+
+static void mem_manage (void)
+{
+  for (;;);
+}
+
+static void bus_fault (void)
+{
+  for (;;);
+}
+
+static void usage_fault (void)
+{
+  for (;;);
+}
+
+static void none (void)
+{
+}
+
+
+typedef void (*handler)(void);
+extern uint8_t __main_stack_end__;
+
+handler vector[] __attribute__ ((section(".vectors"))) = {
+  (handler)&__main_stack_end__,
+  reset,
+  nmi,		/* nmi */
+  hard_fault,		/* hard fault */
+  /* 0x10 */
+  mem_manage,		/* mem manage */
+  bus_fault,		/* bus fault */
+  usage_fault,		/* usage fault */
+  none,
+  /* 0x20 */
+  none, none, none,		/* reserved */
+  svc,				/* SVCall */
+  none,				/* Debug */
+  none,				/* reserved */
+  preempt,			/* PendSV */
+  chx_timer_expired,		/* SysTick */
+  /* 0x40 */
+  chx_handle_intr /* WWDG */,     chx_handle_intr /* PVD */,
+  chx_handle_intr /* TAMPER */,   chx_handle_intr /* RTC */,
+  chx_handle_intr /* FLASH */,    chx_handle_intr /* RCC */,
+  chx_handle_intr /* EXTI0 */,    chx_handle_intr /* EXTI1 */,
+  /* 0x60 */
+  chx_handle_intr /* EXTI2 */,    chx_handle_intr /* EXTI3 */,
+  chx_handle_intr /* EXTI4 */,    chx_handle_intr /* DMA1 CH1 */,
+  chx_handle_intr /* DMA1 CH2 */, chx_handle_intr /* DMA1 CH3 */,
+  chx_handle_intr /* DMA1 CH4 */, chx_handle_intr /* DMA1 CH5 */,
+  /* 0x80 */
+  chx_handle_intr /* DMA1 CH6 */, chx_handle_intr /* DMA1 CH7 */,
+  chx_handle_intr /* ADC1_2 */,   chx_handle_intr /* USB HP */,
+  /* 0x90 */
+  chx_handle_intr /* USB LP */,   chx_handle_intr /* CAN */, 
+  /* ... and more.  EXT9_5, TIMx, I2C, SPI, USART, EXT15_10 */
+  chx_handle_intr,                chx_handle_intr,
+  /* 0xA0 */
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,  chx_handle_intr,
+  /* 0xc0 */
+};
--- a/example-led/Makefile
+++ b/example-led/Makefile
@@ -2,9 +2,14 @@

 PROJECT = sample

+### Currently, it's for STM32F0 Discovery.
+### Please change lines started with '###' for Cortex-M3 board.
+
 CHOPSTX = ..
 LDSCRIPT= sample.ld
-CSRC = sys.c aes-constant-ft.c sample.c
+### LDSCRIPT= sample.ld.m3
+CSRC = sys.c sample.c
+### CSRC = sys.c aes-constant-ft.c sample.c

 ###################################
 CROSS = arm-none-eabi-
@@ -12,10 +17,11 @@ CC   = $(CROSS)gcc
 LD   = $(CROSS)gcc
 OBJCOPY   = $(CROSS)objcopy

-MCU   = cortex-m3
+### MCU   = cortex-m3
+MCU   = cortex-m0
 CWARN = -Wall -Wextra -Wstrict-prototypes
-DEFS  = -DHAVE_SYS_H -DFREE_STANDING
-# DEFS  = -DFREE_STANDING -DHAVE_SYS_H -DBUSY_LOOP -DCHX_FLAGS_MAIN=CHOPSTX_SCHED_RR
+DEFS  = -DHAVE_SYS_H -DFREE_STANDING -DMHZ=48
+### DEFS  = -DFREE_STANDING -DHAVE_SYS_H -DBUSY_LOOP -DCHX_FLAGS_MAIN=CHOPSTX_SCHED_RR
 OPT   = -O3 -Os -g
 LIBS  =

--- a/example-led/board.h
+++ b/example-led/board.h
@@ -0,0 +1 @@
+../board/board-stm32f0-discovery.h
--- a/example-led/sample.ld
+++ b/example-led/sample.ld
@@ -1,5 +1,5 @@
 /*
- * ST32F103 memory setup.
+ * ST32F0 memory setup.
 */
 __main_stack_size__     = 0x0100;  /* Exception handlers     */
 __process0_stack_size__  = 0x0100; /* Main program           */
@@ -14,9 +14,6 @@ MEMORY
    ram : org = 0x20000000, len = 20k
 }

-__flash_start__ = 0x08001000;
-__flash_end__   = 0x08020000;
-
 __ram_start__           = ORIGIN(ram);
 __ram_size__            = 20k;
 __ram_end__             = __ram_start__ + __ram_size__;
@@ -25,21 +22,25 @@ SECTIONS
 {
    . = 0;

-    .sys : ALIGN(16) SUBALIGN(16)
+    .sys : ALIGN(4) SUBALIGN(4)
    {
 	_sys = .;
 	KEEP(*(.vectors))
 	. = ALIGN(16);
-	*(.sys.version)
+	KEEP(*(.sys.version))
+	KEEP(*(.sys.board_id))
+	KEEP(*(.sys.board_name))
 	build/sys.o(.text)
 	build/sys.o(.text.*)
 	build/sys.o(.rodata)
 	build/sys.o(.rodata.*)
 	. = ALIGN(1024);
+/*
 	*(.sys.0)
 	*(.sys.1)
 	*(.sys.2)
-    } > flash0
+*/
+    } > flash0 =0xffffffff

    _text = .;

@@ -59,6 +60,7 @@ SECTIONS
        *(.glue_7t)
        *(.glue_7)
        *(.gcc*)
+	. = ALIGN(8);
    } > flash

    .ARM.extab : {*(.ARM.extab* .gnu.linkonce.armextab.*)} > flash
@@ -78,21 +80,28 @@ SECTIONS
    _etext = .;
    _textdata = _etext;

+    .vectors_in_ram :
+    {
+        . = ALIGN(8);
+        __vector_ram_addr__ = .;
+	KEEP(*(.bss.startup.*))
+    } > ram
+
    .process_stack :
    {
        . = ALIGN(8);
        __process3_stack_base__ = .;
        . += __process3_stack_size__;
        . = ALIGN(8);
-        __process_stack3_end__ = .;
+        __process3_stack_end__ = .;
        __process2_stack_base__ = .;
        . += __process2_stack_size__;
        . = ALIGN(8);
-        __process_stack2_end__ = .;
+        __process2_stack_end__ = .;
        __process1_stack_base__ = .;
        . += __process1_stack_size__;
        . = ALIGN(8);
-        __process_stack1_end__ = .;
+        __process1_stack_end__ = .;
        __process0_stack_base__ = .;
        . += __process0_stack_size__;
        . = ALIGN(8);
--- a/example-led/sample.ld.m3
+++ b/example-led/sample.ld.m3
@@ -0,0 +1,142 @@
+/*
+ * ST32F103 memory setup.
+ */
+__main_stack_size__     = 0x0100;  /* Exception handlers     */
+__process0_stack_size__  = 0x0100; /* Main program           */
+__process1_stack_size__  = 0x0100; /* first thread program */
+__process2_stack_size__  = 0x0100; /* second thread program */
+__process3_stack_size__  = 0x0100; /* third thread program */
+
+MEMORY
+{
+    flash0 : org = 0x08000000, len = 4k
+    flash  : org = 0x08000000+0x1000, len = 60k
+    ram : org = 0x20000000, len = 20k
+}
+
+__ram_start__           = ORIGIN(ram);
+__ram_size__            = 20k;
+__ram_end__             = __ram_start__ + __ram_size__;
+
+SECTIONS
+{
+    . = 0;
+
+    .sys : ALIGN(4) SUBALIGN(4)
+    {
+	_sys = .;
+	KEEP(*(.vectors))
+	. = ALIGN(16);
+	KEEP(*(.sys.version))
+	KEEP(*(.sys.board_id))
+	KEEP(*(.sys.board_name))
+	build/sys.o(.text)
+	build/sys.o(.text.*)
+	build/sys.o(.rodata)
+	build/sys.o(.rodata.*)
+	. = ALIGN(1024);
+	*(.sys.0)
+	*(.sys.1)
+	*(.sys.2)
+    } > flash0
+
+    _text = .;
+
+    .startup : ALIGN(128) SUBALIGN(128)
+    {
+        KEEP(*(.startup.vectors))
+        . = ALIGN (16);
+    } > flash =0xffffffff
+
+    .text : ALIGN(16) SUBALIGN(16)
+    {
+        *(.text.startup.*)
+        *(.text)
+        *(.text.*)
+        *(.rodata)
+        *(.rodata.*)
+        *(.glue_7t)
+        *(.glue_7)
+        *(.gcc*)
+	. = ALIGN(8);
+    } > flash
+
+    .ARM.extab : {*(.ARM.extab* .gnu.linkonce.armextab.*)} > flash
+
+    .ARM.exidx : {
+        PROVIDE(__exidx_start = .);
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+        PROVIDE(__exidx_end = .);
+     } > flash
+
+    .eh_frame_hdr : {*(.eh_frame_hdr)} > flash
+
+    .eh_frame : ONLY_IF_RO {*(.eh_frame)} > flash
+
+    .textalign : ONLY_IF_RO { . = ALIGN(8); } > flash
+
+    _etext = .;
+    _textdata = _etext;
+
+    .process_stack :
+    {
+        . = ALIGN(8);
+        __process3_stack_base__ = .;
+        . += __process3_stack_size__;
+        . = ALIGN(8);
+        __process3_stack_end__ = .;
+        __process2_stack_base__ = .;
+        . += __process2_stack_size__;
+        . = ALIGN(8);
+        __process2_stack_end__ = .;
+        __process1_stack_base__ = .;
+        . += __process1_stack_size__;
+        . = ALIGN(8);
+        __process1_stack_end__ = .;
+        __process0_stack_base__ = .;
+        . += __process0_stack_size__;
+        . = ALIGN(8);
+        __process0_stack_end__ = .;
+    } > ram
+
+    .main_stack :
+    {
+        . = ALIGN(8);
+        __main_stack_base__ = .;
+        . += __main_stack_size__;
+        . = ALIGN(8);
+        __main_stack_end__ = .;
+    } > ram
+
+    .data :
+    {
+        . = ALIGN(4);
+        PROVIDE(_data = .);
+        *(.data)
+        . = ALIGN(4);
+        *(.data.*)
+        . = ALIGN(4);
+        *(.ramtext)
+        . = ALIGN(4);
+        PROVIDE(_edata = .);
+    } > ram AT > flash
+
+    .bss :
+    {
+        . = ALIGN(4);
+        PROVIDE(_bss_start = .);
+        *(.bss)
+        . = ALIGN(4);
+        *(.bss.*)
+        . = ALIGN(4);
+        *(COMMON)
+        . = ALIGN(4);
+        PROVIDE(_bss_end = .);
+    } > ram
+
+    PROVIDE(end = .);
+    _end            = .;
+}
+
+__heap_base__   = _end;
+__heap_end__    = __ram_end__;
--- a/example-led/sys.c
+++ b/example-led/sys.c
@@ -1,7 +1,7 @@
 /*
- * sys.c - system routines for the initial page for STM32F103.
+ * sys.c - system routines for the initial page for STM32F030 / STM32F103.
 *
- * Copyright (C) 2013 Flying Stone Technology
+ * Copyright (C) 2013, 2014, 2015 Flying Stone Technology
 * Author: NIIBE Yutaka <gniibe@fsij.org>
 *
 * Copying and distribution of this file, with or without modification,
@@ -17,50 +17,13 @@
 #include <stdlib.h>
 #include "board.h"

+#include "clk_gpio_init.c"

 #define CORTEX_PRIORITY_BITS    4
 #define CORTEX_PRIORITY_MASK(n)  ((n) << (8 - CORTEX_PRIORITY_BITS))
 #define USB_LP_CAN1_RX0_IRQn	 20
 #define STM32_USB_IRQ_PRIORITY   11

-
-#define STM32_SW_PLL		(2 << 0)
-#define STM32_PLLSRC_HSE	(1 << 16)
-
-#define STM32_PLLXTPRE_DIV1	(0 << 17)
-#define STM32_PLLXTPRE_DIV2	(1 << 17)
-
-#define STM32_HPRE_DIV1		(0 << 4)
-
-#define STM32_PPRE1_DIV2	(4 << 8)
-
-#define STM32_PPRE2_DIV1        (0 << 11)
-#define STM32_PPRE2_DIV2	(4 << 11)
-
-#define STM32_ADCPRE_DIV4	(1 << 14)
-#define STM32_ADCPRE_DIV6       (2 << 14)
-
-#define STM32_USBPRE_DIV1P5     (0 << 22)
-
-#define STM32_MCO_NOCLOCK	(0 << 24)
-
-#define STM32_SW		STM32_SW_PLL
-#define STM32_PLLSRC		STM32_PLLSRC_HSE
-#define STM32_HPRE		STM32_HPRE_DIV1
-#define STM32_PPRE1		STM32_PPRE1_DIV2
-#define STM32_PPRE2		STM32_PPRE2_DIV1
-#define STM32_ADCPRE		STM32_ADCPRE_DIV6
-#define STM32_MCOSEL		STM32_MCO_NOCLOCK
-#define STM32_USBPRE            STM32_USBPRE_DIV1P5
-
-#define STM32_PLLCLKIN		(STM32_HSECLK / 1)
-#define STM32_PLLMUL		((STM32_PLLMUL_VALUE - 2) << 18)
-#define STM32_PLLCLKOUT		(STM32_PLLCLKIN * STM32_PLLMUL_VALUE)
-#define STM32_SYSCLK		STM32_PLLCLKOUT
-#define STM32_HCLK		(STM32_SYSCLK / 1)
-
-#define STM32_FLASHBITS		0x00000012
-
 struct NVIC {
  uint32_t ISER[8];
  uint32_t unused1[24];
@@ -90,181 +53,6 @@ nvic_enable_vector (uint32_t n, uint32_t prio)
  NVIC_ISER (n) = 1 << (n & 0x1F);
 }

-
-#define PERIPH_BASE	0x40000000
-#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
-#define AHBPERIPH_BASE	(PERIPH_BASE + 0x20000)
-
-struct RCC {
-  volatile uint32_t CR;
-  volatile uint32_t CFGR;
-  volatile uint32_t CIR;
-  volatile uint32_t APB2RSTR;
-  volatile uint32_t APB1RSTR;
-  volatile uint32_t AHBENR;
-  volatile uint32_t APB2ENR;
-  volatile uint32_t APB1ENR;
-  volatile uint32_t BDCR;
-  volatile uint32_t CSR;
-};
-
-#define RCC_BASE		(AHBPERIPH_BASE + 0x1000)
-static struct RCC *const RCC = ((struct RCC *const)RCC_BASE);
-
-#define RCC_APB1ENR_USBEN	0x00800000
-#define RCC_APB1RSTR_USBRST	0x00800000
-
-#define RCC_CR_HSION		0x00000001
-#define RCC_CR_HSIRDY		0x00000002
-#define RCC_CR_HSITRIM		0x000000F8
-#define RCC_CR_HSEON		0x00010000
-#define RCC_CR_HSERDY		0x00020000
-#define RCC_CR_PLLON		0x01000000
-#define RCC_CR_PLLRDY		0x02000000
-
-#define RCC_CFGR_SWS		0x0000000C
-#define RCC_CFGR_SWS_HSI	0x00000000
-
-#define RCC_AHBENR_CRCEN        0x0040
-
-struct FLASH {
-  volatile uint32_t ACR;
-  volatile uint32_t KEYR;
-  volatile uint32_t OPTKEYR;
-  volatile uint32_t SR;
-  volatile uint32_t CR;
-  volatile uint32_t AR;
-  volatile uint32_t RESERVED;
-  volatile uint32_t OBR;
-  volatile uint32_t WRPR;
-};
-
-#define FLASH_R_BASE	(AHBPERIPH_BASE + 0x2000)
-static struct FLASH *const FLASH = ((struct FLASH *const) FLASH_R_BASE);
-
-static void
-clock_init (void)
-{
-  /* HSI setup */
-  RCC->CR |= RCC_CR_HSION;
-  while (!(RCC->CR & RCC_CR_HSIRDY))
-    ;
-  RCC->CR &= RCC_CR_HSITRIM | RCC_CR_HSION;
-  RCC->CFGR = 0;
-  while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
-    ;
-
-  /* HSE setup */
-  RCC->CR |= RCC_CR_HSEON;
-  while (!(RCC->CR & RCC_CR_HSERDY))
-    ;
-
-  /* PLL setup */
-  RCC->CFGR |= STM32_PLLMUL | STM32_PLLXTPRE | STM32_PLLSRC;
-  RCC->CR   |= RCC_CR_PLLON;
-  while (!(RCC->CR & RCC_CR_PLLRDY))
-    ;
-
-  /* Clock settings */
-  RCC->CFGR = STM32_MCOSEL | STM32_USBPRE | STM32_PLLMUL | STM32_PLLXTPRE
-    | STM32_PLLSRC | STM32_ADCPRE | STM32_PPRE2 | STM32_PPRE1 | STM32_HPRE;
-
-  /* Flash setup */
-  FLASH->ACR = STM32_FLASHBITS;
-
-  /* CRC */
-  RCC->AHBENR |= RCC_AHBENR_CRCEN;
-
-  /* Switching on the configured clock source. */
-  RCC->CFGR |= STM32_SW;
-  while ((RCC->CFGR & RCC_CFGR_SWS) != (STM32_SW << 2))
-    ;
-}
-
-#define RCC_APB2RSTR_AFIORST    0x00000001
-#define RCC_APB2RSTR_IOPARST	0x00000004
-#define RCC_APB2RSTR_IOPBRST	0x00000008
-#define RCC_APB2RSTR_IOPCRST	0x00000010
-#define RCC_APB2RSTR_IOPDRST	0x00000020
-
-#define RCC_APB2ENR_AFIOEN      0x00000001
-#define RCC_APB2ENR_IOPAEN	0x00000004
-#define RCC_APB2ENR_IOPBEN	0x00000008
-#define RCC_APB2ENR_IOPCEN	0x00000010
-#define RCC_APB2ENR_IOPDEN	0x00000020
-
-
-struct AFIO
-{
-  volatile uint32_t EVCR;
-  volatile uint32_t MAPR;
-  volatile uint32_t EXTICR[4];
-  uint32_t RESERVED0;
-  volatile uint32_t MAPR2;
-};
-
-#define AFIO_BASE 0x40010000
-static struct AFIO *const AFIO = (struct AFIO *const)AFIO_BASE;
-
-#define AFIO_MAPR_TIM3_REMAP_PARTIALREMAP 0x00000800
-
-
-struct GPIO {
-  volatile uint32_t CRL;
-  volatile uint32_t CRH;
-  volatile uint32_t IDR;
-  volatile uint32_t ODR;
-  volatile uint32_t BSRR;
-  volatile uint32_t BRR;
-  volatile uint32_t LCKR;
-};
-
-#define GPIOA_BASE	(APB2PERIPH_BASE + 0x0800)
-#define GPIOA		((struct GPIO *) GPIOA_BASE)
-#define GPIOB_BASE	(APB2PERIPH_BASE + 0x0C00)
-#define GPIOB		((struct GPIO *) GPIOB_BASE)
-#define GPIOC_BASE	(APB2PERIPH_BASE + 0x1000)
-#define GPIOC		((struct GPIO *) GPIOC_BASE)
-#define GPIOD_BASE	(APB2PERIPH_BASE + 0x1400)
-#define GPIOD		((struct GPIO *) GPIOD_BASE)
-#define GPIOE_BASE	(APB2PERIPH_BASE + 0x1800)
-#define GPIOE		((struct GPIO *) GPIOE_BASE)
-
-static struct GPIO *const GPIO_USB = ((struct GPIO *const) GPIO_USB_BASE);
-static struct GPIO *const GPIO_LED = ((struct GPIO *const) GPIO_LED_BASE);
-#ifdef GPIO_OTHER_BASE
-static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
-#endif
-
-static void
-gpio_init (void)
-{
-  /* Enable GPIO clock. */
-  RCC->APB2ENR |= RCC_APB2ENR_IOP_EN;
-  RCC->APB2RSTR = RCC_APB2RSTR_IOP_RST;
-  RCC->APB2RSTR = 0;
-
-#ifdef AFIO_MAPR_SOMETHING
-  AFIO->MAPR |= AFIO_MAPR_SOMETHING;
-#endif
-
-  GPIO_USB->ODR = VAL_GPIO_ODR;
-  GPIO_USB->CRH = VAL_GPIO_CRH;
-  GPIO_USB->CRL = VAL_GPIO_CRL;
-
-#if GPIO_USB_BASE != GPIO_LED_BASE
-  GPIO_LED->ODR = VAL_GPIO_LED_ODR;
-  GPIO_LED->CRH = VAL_GPIO_LED_CRH;
-  GPIO_LED->CRL = VAL_GPIO_LED_CRL;
-#endif
-
-#ifdef GPIO_OTHER_BASE
-  GPIO_OTHER->ODR = VAL_GPIO_OTHER_ODR;
-  GPIO_OTHER->CRH = VAL_GPIO_OTHER_CRH;
-  GPIO_OTHER->CRL = VAL_GPIO_OTHER_CRL;
-#endif
-}
-
 static void
 usb_cable_config (int enable)
 {
@@ -455,16 +243,25 @@ flash_check_blank (const uint8_t *p_start, size_t size)
  return 1;
 }

-extern uint8_t __flash_start__, __flash_end__;
+#define FLASH_START_ADDR 0x08000000 /* Fixed for all STM32F0/F1.  */
+#define FLASH_OFFSET     0x1000     /* First pages are not-writable
+				       when protected.  */
+#if defined(__ARM_ARCH_6M__)
+#define FLASH_SIZE_REG   ((uint16_t *)0x1ffff7cc)
+#define CHIP_ID_REG      ((uint32_t *)0x40015800)
+#else
+#define FLASH_SIZE_REG   ((uint16_t *)0x1ffff7e0)
+#define CHIP_ID_REG      ((uint32_t *)0xe0042000)
+#endif
+#define FLASH_START      (FLASH_START_ADDR+FLASH_OFFSET)

 static int
 flash_write (uint32_t dst_addr, const uint8_t *src, size_t len)
 {
  int status;
-  uint32_t flash_start = (uint32_t)&__flash_start__;
-  uint32_t flash_end = (uint32_t)&__flash_end__;
+  uint32_t flash_end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024;

-  if (dst_addr < flash_start || dst_addr + len > flash_end)
+  if (dst_addr < FLASH_START || dst_addr + len > flash_end)
    return 0;

  while (len)
@@ -517,17 +314,21 @@ flash_protect (void)
 static void __attribute__((naked))
 flash_erase_all_and_exec (void (*entry)(void))
 {
-  uint32_t addr = (uint32_t)&__flash_start__;
-  uint32_t end = (uint32_t)&__flash_end__;
+  uint32_t addr = FLASH_START;
+  uint32_t end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024;
+  uint32_t page_size = 1024;
  int r;

+  if (((*CHIP_ID_REG) & 0xfff) == 0x0414)
+    page_size = 2048;
+
  while (addr < end)
    {
      r = flash_erase_page (addr);
      if (r != 0)
 	break;

-      addr += FLASH_PAGE_SIZE;
+      addr += page_size;
    }

  if (addr >= end)
@@ -575,11 +376,35 @@ nvic_system_reset (void)
 static void __attribute__ ((naked))
 reset (void)
 {
-  extern const unsigned long *FT0, *FT1, *FT2;
-
+  /*
+   * This code may not be at the start of flash ROM, because of DFU.
+   * So, we take the address from PC.
+   */
+#if defined(__ARM_ARCH_6M__)
  asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
-		"mov.w	r0, #0xed00\n\t" /* r0 = SCR */
-		"movt	r0, #0xe000\n\t"
+		"ldr	r0, 1f\n\t"     /* r0 = RAM start */
+		"mov	r1, pc\n\t"	/* r1 = (PC + 0x1000) & ~0x0fff */
+		"mov	r2, #0x10\n\t"
+		"lsl	r2, #8\n\t"
+		"add	r1, r1, r2\n\t"
+		"sub	r2, r2, #1\n\t"
+		"bic	r1, r1, r2\n\t"
+		"mov	r2, #188\n"
+	"2:\n\t" /* Copy vectors.  It will be enabled later by clock_init.  */
+		"ldr	r3, [r1, r2]\n\t"
+		"str	r3, [r0, r2]\n\t"
+		"sub	r2, #4\n\t"
+		"bcs	2b\n\t"
+		"msr	MSP, r3\n\t"	/* Main (exception handler) stack. */
+		"ldr	r0, [r1, #4]\n\t" /* Reset handler.                */
+		"bx	r0\n\t"
+		".align	2\n"
+	"1:	.word	0x20000000"
+		: /* no output */ : /* no input */ : "memory");
+#else
+  extern const unsigned long *FT0, *FT1, *FT2;
+  asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
+		"ldr	r0, 1f\n\t"     /* r0 = SCR */
 		"mov	r1, pc\n\t"	/* r1 = (PC + 0x1000) & ~0x0fff */
 		"mov	r2, #0x1000\n\t"
 		"add	r1, r1, r2\n\t"
@@ -589,13 +414,15 @@ reset (void)
 		"ldr	r0, [r1], #4\n\t"
 		"msr	MSP, r0\n\t"	/* Main (exception handler) stack. */
 		"ldr	r0, [r1]\n\t"	/* Reset handler.                  */
-		"bx	r0\n"
+		"bx	r0\n\t"
+		".align	2\n"
+	"1:	.word	0xe000ed00"
 		: /* no output */ : /* no input */ : "memory");
-
-  /* Never reach here. */
  /* Artificial entry to refer FT0, FT1, and FT2.  */
  asm volatile (""
 		: : "r" (FT0), "r" (FT1), "r" (FT2));
+#endif
+  /* Never reach here. */
 }

 typedef void (*handler)(void);
@@ -623,6 +450,12 @@ handler vector[] __attribute__ ((section(".vectors"))) = {
 const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = {
  3*2+2,	     /* bLength */
  0x03,		     /* bDescriptorType = USB_STRING_DESCRIPTOR_TYPE */
-  /* sys version: "2.0" */
-  '2', 0, '.', 0, '0', 0,
+  /* sys version: "2.1" */
+  '2', 0, '.', 0, '1', 0,
 };
+
+const uint32_t __attribute__((section(".sys.board_id")))
+sys_board_id = BOARD_ID;
+
+const uint8_t __attribute__((section(".sys.board_name")))
+sys_board_name[] = BOARD_NAME;
--- a/example-led/sys.h
+++ b/example-led/sys.h
@@ -1,4 +1,23 @@
+#if defined(__ARM_ARCH_6M__)
+#define BOARD_ID_STM32F0_DISCOVERY 0xde4b4bc1
+#define BOARD_ID_FSM_55            0x83433c76
+#else
+#define BOARD_ID_CQ_STARM          0xc5480875
+#define BOARD_ID_FST_01_00         0x613870a9
+#define BOARD_ID_FST_01            0x696886af
+#define BOARD_ID_MAPLE_MINI        0x7a445272
+#define BOARD_ID_OLIMEX_STM32_H103 0xf92bb594
+#define BOARD_ID_STBEE_MINI        0x1f341961
+#define BOARD_ID_STBEE             0x945c37e8
+#define BOARD_ID_STM32_PRIMER2     0x21e5798d
+#define BOARD_ID_STM8S_DISCOVERY   0x2f0976bb
+#define BOARD_ID_ST_DONGLE         0x2cd4e471
+#define BOARD_ID_ST_NUCLEO_F103    0x9b87c16d
+#endif
+
 extern const uint8_t sys_version[8];
+extern const uint32_t sys_board_id;
+extern const uint8_t sys_board_name[];

 typedef void (*handler)(void);
 extern handler vector[16];
--- a/example-primer2/Makefile
+++ b/example-primer2/Makefile
@@ -0,0 +1,40 @@
+# Makefile for example application of Chopstx
+
+PROJECT = lcd
+
+CHOPSTX = ..
+NEUGSRC = ./neug/src
+LDSCRIPT= lcd.ld
+CSRC = sys.c aes-constant-ft.c primer2-switches.c primer2-ts.c lcd.c main.c \
+       adc_stm32f103.c neug.c sha256.c
+
+###################################
+CROSS = arm-none-eabi-
+CC   = $(CROSS)gcc
+LD   = $(CROSS)gcc
+OBJCOPY   = $(CROSS)objcopy
+MCU   = cortex-m3
+CWARN = -Wall -Wextra -Wstrict-prototypes
+DEFS  = -DHAVE_SYS_H -DFREE_STANDING -DMHZ=48
+# DEFS  = -DFREE_STANDING -DHAVE_SYS_H -DBUSY_LOOP -DCHX_FLAGS_MAIN=CHOPSTX_SCHED_RR
+OPT   = -O3 -Os -g
+INCDIR = $(NEUGSRC)
+LIBS  =
+
+####################
+include ../rules.mk
+
+board.h: ../board/board-stm32-primer2.h neug
+	ln -s ../board/board-stm32-primer2.h ./board.h
+
+sys.c: board.h
+
+neug:
+	@echo Please make a symbolic link \'neug\' to the neug directory;
+	@exit 1
+
+adc_stm32f103.c neug.c sha256.c:
+	ln -s $(NEUGSRC)/$@ $@
+
+distclean: clean
+	rm -f board.h neug adc_stm32f103.c neug.c sha256.c
--- a/example-primer2/README
+++ b/example-primer2/README
@@ -0,0 +1,18 @@
+Example for STM32 Primer2 by Kazmoto Kojima
+
+It is taken from:
+
+   http://www.rr.iij4u.or.jp/~kkojima/letschopstx.html
+
+From the original tar archive, chopstx-logo.data is removed because
+it's too big.
+
+You can generate it by ImageMagick.
+
+  $ convert ../chopstx.svg -depth 8 -flip \( +clone -channel B -fx R \) +swap -channel R -fx v.B -resize 128x160 -background white -compress none -flatten chopstx.ppm
+
+  $ tail -n +4 chopstx.ppm | sed -e 's/ /, /g' > chopstx-logo.data
+
+
+Since it was written for Chopstx 0.06, you would need to change a bit,
+perhaps.
--- a/example-primer2/aes-constant-ft.c
+++ b/example-primer2/aes-constant-ft.c
@@ -0,0 +1,145 @@
+/*
+ * aes-constant-ft.c - AES forward tables.
+ *
+ * We need something useful for the initial flash ROM page (4 Ki
+ * bytes), which cannot be modified after installation.  Even after
+ * upgrade of the firmware, it stays intact.
+ *
+ * We decide to put 3/4 of AES forward tables to fill 3 Ki bytes, as
+ * its useful and it won't change.
+ *
+ * The code was taken from aes.c of PolarSSL version 0.14, and then,
+ * modified to add section names.
+ *
+ * Since this is just a data, it wouldn't be copyright-able, but the
+ * original auther would claim so.  Thus, we put original copyright
+ * notice here.  It is highly likely that there will be no such a
+ * thing for copyright.  Nevertheless, we think that PolarSSL is good
+ * software to address here, and encourage people using it.
+ *
+ */
+
+#include <stdint.h>
+
+/*
+ * Original copyright notice is below:
+ */
+
+/*
+ *  FIPS-197 compliant AES implementation
+ *
+ *  Copyright (C) 2006-2010, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ *  The AES block cipher was designed by Vincent Rijmen and Joan Daemen.
+ *
+ *  http://csrc.nist.gov/encryption/aes/rijndael/Rijndael.pdf
+ *  http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
+ */
+
+/*
+ * Forward tables
+ */
+#define FT \
+\
+    V(A5,63,63,C6), V(84,7C,7C,F8), V(99,77,77,EE), V(8D,7B,7B,F6), \
+    V(0D,F2,F2,FF), V(BD,6B,6B,D6), V(B1,6F,6F,DE), V(54,C5,C5,91), \
+    V(50,30,30,60), V(03,01,01,02), V(A9,67,67,CE), V(7D,2B,2B,56), \
+    V(19,FE,FE,E7), V(62,D7,D7,B5), V(E6,AB,AB,4D), V(9A,76,76,EC), \
+    V(45,CA,CA,8F), V(9D,82,82,1F), V(40,C9,C9,89), V(87,7D,7D,FA), \
+    V(15,FA,FA,EF), V(EB,59,59,B2), V(C9,47,47,8E), V(0B,F0,F0,FB), \
+    V(EC,AD,AD,41), V(67,D4,D4,B3), V(FD,A2,A2,5F), V(EA,AF,AF,45), \
+    V(BF,9C,9C,23), V(F7,A4,A4,53), V(96,72,72,E4), V(5B,C0,C0,9B), \
+    V(C2,B7,B7,75), V(1C,FD,FD,E1), V(AE,93,93,3D), V(6A,26,26,4C), \
+    V(5A,36,36,6C), V(41,3F,3F,7E), V(02,F7,F7,F5), V(4F,CC,CC,83), \
+    V(5C,34,34,68), V(F4,A5,A5,51), V(34,E5,E5,D1), V(08,F1,F1,F9), \
+    V(93,71,71,E2), V(73,D8,D8,AB), V(53,31,31,62), V(3F,15,15,2A), \
+    V(0C,04,04,08), V(52,C7,C7,95), V(65,23,23,46), V(5E,C3,C3,9D), \
+    V(28,18,18,30), V(A1,96,96,37), V(0F,05,05,0A), V(B5,9A,9A,2F), \
+    V(09,07,07,0E), V(36,12,12,24), V(9B,80,80,1B), V(3D,E2,E2,DF), \
+    V(26,EB,EB,CD), V(69,27,27,4E), V(CD,B2,B2,7F), V(9F,75,75,EA), \
+    V(1B,09,09,12), V(9E,83,83,1D), V(74,2C,2C,58), V(2E,1A,1A,34), \
+    V(2D,1B,1B,36), V(B2,6E,6E,DC), V(EE,5A,5A,B4), V(FB,A0,A0,5B), \
+    V(F6,52,52,A4), V(4D,3B,3B,76), V(61,D6,D6,B7), V(CE,B3,B3,7D), \
+    V(7B,29,29,52), V(3E,E3,E3,DD), V(71,2F,2F,5E), V(97,84,84,13), \
+    V(F5,53,53,A6), V(68,D1,D1,B9), V(00,00,00,00), V(2C,ED,ED,C1), \
+    V(60,20,20,40), V(1F,FC,FC,E3), V(C8,B1,B1,79), V(ED,5B,5B,B6), \
+    V(BE,6A,6A,D4), V(46,CB,CB,8D), V(D9,BE,BE,67), V(4B,39,39,72), \
+    V(DE,4A,4A,94), V(D4,4C,4C,98), V(E8,58,58,B0), V(4A,CF,CF,85), \
+    V(6B,D0,D0,BB), V(2A,EF,EF,C5), V(E5,AA,AA,4F), V(16,FB,FB,ED), \
+    V(C5,43,43,86), V(D7,4D,4D,9A), V(55,33,33,66), V(94,85,85,11), \
+    V(CF,45,45,8A), V(10,F9,F9,E9), V(06,02,02,04), V(81,7F,7F,FE), \
+    V(F0,50,50,A0), V(44,3C,3C,78), V(BA,9F,9F,25), V(E3,A8,A8,4B), \
+    V(F3,51,51,A2), V(FE,A3,A3,5D), V(C0,40,40,80), V(8A,8F,8F,05), \
+    V(AD,92,92,3F), V(BC,9D,9D,21), V(48,38,38,70), V(04,F5,F5,F1), \
+    V(DF,BC,BC,63), V(C1,B6,B6,77), V(75,DA,DA,AF), V(63,21,21,42), \
+    V(30,10,10,20), V(1A,FF,FF,E5), V(0E,F3,F3,FD), V(6D,D2,D2,BF), \
+    V(4C,CD,CD,81), V(14,0C,0C,18), V(35,13,13,26), V(2F,EC,EC,C3), \
+    V(E1,5F,5F,BE), V(A2,97,97,35), V(CC,44,44,88), V(39,17,17,2E), \
+    V(57,C4,C4,93), V(F2,A7,A7,55), V(82,7E,7E,FC), V(47,3D,3D,7A), \
+    V(AC,64,64,C8), V(E7,5D,5D,BA), V(2B,19,19,32), V(95,73,73,E6), \
+    V(A0,60,60,C0), V(98,81,81,19), V(D1,4F,4F,9E), V(7F,DC,DC,A3), \
+    V(66,22,22,44), V(7E,2A,2A,54), V(AB,90,90,3B), V(83,88,88,0B), \
+    V(CA,46,46,8C), V(29,EE,EE,C7), V(D3,B8,B8,6B), V(3C,14,14,28), \
+    V(79,DE,DE,A7), V(E2,5E,5E,BC), V(1D,0B,0B,16), V(76,DB,DB,AD), \
+    V(3B,E0,E0,DB), V(56,32,32,64), V(4E,3A,3A,74), V(1E,0A,0A,14), \
+    V(DB,49,49,92), V(0A,06,06,0C), V(6C,24,24,48), V(E4,5C,5C,B8), \
+    V(5D,C2,C2,9F), V(6E,D3,D3,BD), V(EF,AC,AC,43), V(A6,62,62,C4), \
+    V(A8,91,91,39), V(A4,95,95,31), V(37,E4,E4,D3), V(8B,79,79,F2), \
+    V(32,E7,E7,D5), V(43,C8,C8,8B), V(59,37,37,6E), V(B7,6D,6D,DA), \
+    V(8C,8D,8D,01), V(64,D5,D5,B1), V(D2,4E,4E,9C), V(E0,A9,A9,49), \
+    V(B4,6C,6C,D8), V(FA,56,56,AC), V(07,F4,F4,F3), V(25,EA,EA,CF), \
+    V(AF,65,65,CA), V(8E,7A,7A,F4), V(E9,AE,AE,47), V(18,08,08,10), \
+    V(D5,BA,BA,6F), V(88,78,78,F0), V(6F,25,25,4A), V(72,2E,2E,5C), \
+    V(24,1C,1C,38), V(F1,A6,A6,57), V(C7,B4,B4,73), V(51,C6,C6,97), \
+    V(23,E8,E8,CB), V(7C,DD,DD,A1), V(9C,74,74,E8), V(21,1F,1F,3E), \
+    V(DD,4B,4B,96), V(DC,BD,BD,61), V(86,8B,8B,0D), V(85,8A,8A,0F), \
+    V(90,70,70,E0), V(42,3E,3E,7C), V(C4,B5,B5,71), V(AA,66,66,CC), \
+    V(D8,48,48,90), V(05,03,03,06), V(01,F6,F6,F7), V(12,0E,0E,1C), \
+    V(A3,61,61,C2), V(5F,35,35,6A), V(F9,57,57,AE), V(D0,B9,B9,69), \
+    V(91,86,86,17), V(58,C1,C1,99), V(27,1D,1D,3A), V(B9,9E,9E,27), \
+    V(38,E1,E1,D9), V(13,F8,F8,EB), V(B3,98,98,2B), V(33,11,11,22), \
+    V(BB,69,69,D2), V(70,D9,D9,A9), V(89,8E,8E,07), V(A7,94,94,33), \
+    V(B6,9B,9B,2D), V(22,1E,1E,3C), V(92,87,87,15), V(20,E9,E9,C9), \
+    V(49,CE,CE,87), V(FF,55,55,AA), V(78,28,28,50), V(7A,DF,DF,A5), \
+    V(8F,8C,8C,03), V(F8,A1,A1,59), V(80,89,89,09), V(17,0D,0D,1A), \
+    V(DA,BF,BF,65), V(31,E6,E6,D7), V(C6,42,42,84), V(B8,68,68,D0), \
+    V(C3,41,41,82), V(B0,99,99,29), V(77,2D,2D,5A), V(11,0F,0F,1E), \
+    V(CB,B0,B0,7B), V(FC,54,54,A8), V(D6,BB,BB,6D), V(3A,16,16,2C)
+
+#define V(a,b,c,d) 0x##a##b##c##d
+const uint32_t FT0[256] __attribute__((section(".sys.0"))) = { FT };
+#undef V
+
+#define V(a,b,c,d) 0x##b##c##d##a
+const uint32_t FT1[256] __attribute__((section(".sys.1"))) = { FT };
+#undef V
+
+#define V(a,b,c,d) 0x##c##d##a##b
+const uint32_t FT2[256] __attribute__((section(".sys.2"))) = { FT };
+#undef V
+
+#ifdef ORIGINAL_IMPLEMENTATION 
+#define V(a,b,c,d) 0x##d##a##b##c
+const uint32_t FT3[256] = { FT };
+#undef V
+#endif
--- a/example-primer2/lcd.c
+++ b/example-primer2/lcd.c
@@ -0,0 +1,388 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chopstx.h>
+#include "sys.h" /* for set_led */
+#include "st7732.h"
+#include "board.h"
+
+#define PERIPH_BASE	0x40000000
+#define APBPERIPH_BASE   PERIPH_BASE
+#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
+
+struct GPIO {
+  volatile uint32_t CRL;
+  volatile uint32_t CRH;
+  volatile uint32_t IDR;
+  volatile uint32_t ODR;
+  volatile uint32_t BSRR;
+  volatile uint32_t BRR;
+  volatile uint32_t LCKR;
+};
+
+#define GPIOA_BASE	(APB2PERIPH_BASE + 0x0800)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOB_BASE	(APB2PERIPH_BASE + 0x0C00)
+#define GPIOB		((struct GPIO *) GPIOB_BASE)
+#define GPIOC_BASE	(APB2PERIPH_BASE + 0x1000)
+#define GPIOC		((struct GPIO *) GPIOC_BASE)
+#define GPIOD_BASE	(APB2PERIPH_BASE + 0x1400)
+#define GPIOD		((struct GPIO *) GPIOD_BASE)
+#define GPIOE_BASE	(APB2PERIPH_BASE + 0x1800)
+#define GPIOE		((struct GPIO *) GPIOE_BASE)
+
+static struct GPIO *const GPIO_LCD = ((struct GPIO *const) GPIO_LED_BASE);
+static struct GPIO *const GPIO_LCD_CTRL = ((struct GPIO *const) GPIO_USB_BASE);
+
+#define GPIO_LCD_RD	4
+#define GPIO_LCD_WR	5
+#define GPIO_LCD_RST	6
+#define GPIO_LCD_CS	7
+#define GPIO_LCD_RS	11
+/* PE7:LCD_D0 - PE14:LCD_D7 */
+#define GPIO_DATA_SHIFT	7
+#define GPIO_DATA_MASK (0xff << GPIO_DATA_SHIFT)
+
+static void
+lcd_command_common (st7732_cmd_t cmd)
+{
+  /* Set command. */
+  GPIO_LCD->BRR = GPIO_DATA_MASK & ~(cmd << GPIO_DATA_SHIFT);
+  GPIO_LCD->BSRR = GPIO_DATA_MASK & (cmd << GPIO_DATA_SHIFT);
+  /* Set CMD mode.  */
+  GPIO_LCD_CTRL->BRR = (1 << GPIO_LCD_RS);
+  /* Asert /CS.  */
+  GPIO_LCD_CTRL->BRR = (1<< GPIO_LCD_CS);
+  /* Asert /WR.  */
+  GPIO_LCD_CTRL->BRR = (1<< GPIO_LCD_WR);
+  // chopstx_usec_wait (1);
+  /* Negate /WR.  */
+  GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_WR);
+
+  /* Return DATA mode.  */
+  GPIO_LCD_CTRL->BSRR = (1 << GPIO_LCD_RS);
+}
+
+/* Issue command with no data read/write.  */
+void
+lcd_command_no (st7732_cmd_t cmd)
+{
+  lcd_command_common (cmd);
+
+  /* Negate /CS.  */
+  GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_CS);
+}
+
+#if 0
+void
+lcd_command_readn (st7732_cmd_t cmd, uint8_t *data, size_t n)
+{
+  volatile int dummy __attribute__ ((unused));
+
+  lcd_command_common (cmd);
+
+  /* Set GPIO_LCD to input mode.  */
+  GPIO_LCD->CRH = 0x88888888;
+  GPIO_LCD->CRL = 0x88888833;
+
+  /* Assert /RD.  */
+  GPIO_LCD_CTRL->BRR = (1<< GPIO_LCD_RD);
+  // chopstx_usec_wait (1);
+  /* Dummy read.  */
+  dummy = GPIO_LCD->IDR;
+  /* Negate /RD.  */
+  GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_RD);
+
+  /* Read loop.  */
+  while (n-- > 0)
+    {
+      /* Assert /RD.  */
+      GPIO_LCD_CTRL->BRR = (1<< GPIO_LCD_RD);
+      // chopstx_usec_wait (1);
+      /* Negate /RD.  */
+      GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_RD);
+      *data++ = GPIO_LCD->IDR >> GPIO_DATA_SHIFT;
+    }
+	  
+  /* Negate /CS.  */
+  GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_CS);
+
+  /* Set GPIO_LCD to output mode.  */
+  GPIO_LCD->CRH = 0x83333333;
+  GPIO_LCD->CRL = 0x38888833;
+}
+#endif
+
+/* Issue command with N data write.  */
+void
+lcd_command_writen (st7732_cmd_t cmd, uint8_t *data, size_t n)
+{
+  lcd_command_common (cmd);
+
+  /* Write loop.  */
+  while (n-- > 0)
+    {
+      uint8_t b = *data++;
+
+      GPIO_LCD->BRR = GPIO_DATA_MASK & ~(b << GPIO_DATA_SHIFT);
+      GPIO_LCD->BSRR = GPIO_DATA_MASK & (b << GPIO_DATA_SHIFT);
+      /* Assert /WR.  */
+      GPIO_LCD_CTRL->BRR = (1<< GPIO_LCD_WR);
+      // chopstx_usec_wait (1);
+      /* Negate /WR.  */
+      GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_WR);
+    }
+
+  /* Negate /CS.  */
+  GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_CS);
+}
+
+/* Issue command with N same data write.  */
+void
+lcd_command_filln (st7732_cmd_t cmd, uint8_t b, size_t n)
+{
+  lcd_command_common (cmd);
+
+  /* Write loop.  */
+  while (n-- > 0)
+    {
+      GPIO_LCD->BRR = GPIO_DATA_MASK & ~(b << GPIO_DATA_SHIFT);
+      GPIO_LCD->BSRR = GPIO_DATA_MASK & (b << GPIO_DATA_SHIFT);
+      /* Assert /WR.  */
+      GPIO_LCD_CTRL->BRR = (1<< GPIO_LCD_WR);
+      // chopstx_usec_wait (1);
+      /* Negate /WR.  */
+      GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_WR);
+    }
+
+  /* Negate /CS.  */
+  GPIO_LCD_CTRL->BSRR = (1<< GPIO_LCD_CS);
+}
+
+static chopstx_mutex_t lcd_mtx;
+static chopstx_cond_t lcd_cnd0;
+static chopstx_cond_t lcd_cnd1;
+
+/* Process for initializing ST7732.  */
+static void *
+lcd_initializer (void *arg __attribute__((unused)))
+{
+  uint8_t args[16];
+
+  chopstx_mutex_lock (&lcd_mtx);
+  chopstx_cond_wait (&lcd_cnd0, &lcd_mtx);
+  chopstx_mutex_unlock (&lcd_mtx);
+
+ /* Set GPIO_LCD to write mode.  */
+  GPIO_LCD->CRH = 0x83333333;
+  GPIO_LCD->CRL = 0x38888833;
+
+  /* Set GPIO_LCD_CTRL IO mode.  */
+  GPIO_LCD_CTRL->CRH = 0x88883888;
+  GPIO_LCD_CTRL->CRL = 0x33333888;
+
+  /* Restart ST7732.  */
+  /* Hard reset.  */
+  chopstx_usec_wait (100000);
+  GPIO_LCD_CTRL->BRR = (1 << GPIO_LCD_RST);
+  chopstx_usec_wait (100000);
+  GPIO_LCD_CTRL->BSRR = (1 << GPIO_LCD_RST);
+  chopstx_usec_wait (100000);
+
+  /* Software reset.  */
+  lcd_command_no (SWRESET);
+  chopstx_usec_wait (150000);
+
+  /* Sleep in.  */
+  lcd_command_no (SLPIN);
+  chopstx_usec_wait (100000);
+
+  /* Sleep out.  */
+  lcd_command_no (SLPOUT);
+  chopstx_usec_wait (100000);
+
+  /* Configure ST7732.  Set display mode, pixel mode, etc.  */
+  /* FRMCTR1, 6, 3, 2  */
+  args[0] = 0x06; args[1] = 0x03; args[2] = 0x02;
+  lcd_command_writen (FRMCTR1, args, 3);
+  /* INVCTR, 3  */
+  args[0] = 0x03;
+  lcd_command_writen (INVCTR, args, 1);
+  /* DISSET5, 2, eh  */
+  args[0] = 0x02; args[1] = 0x0e;
+  lcd_command_writen (DISSET5, args, 2);
+  /* DISPCTRL, 1ah  */
+  args[0] = 0x1a;
+  lcd_command_writen (DISPCTRL, args, 1);
+  /* PWCTR1, 2, 0  */
+  args[0] = 0x02; args[1] = 0x00;
+  lcd_command_writen (PWCTR1, args, 2);
+  /* PWCTR2, 5  */
+  args[0] = 0x05;
+  lcd_command_writen (PWCTR2, args, 1);
+  /* PWCTR3, 2, 2  */
+  args[0] = 0x02; args[1] = 0x02;
+  lcd_command_writen (PWCTR3, args, 2);
+  /* PWCTR4, 1, 2  */
+  args[0] = 0x01; args[1] = 0x00;
+  lcd_command_writen (PWCTR4, args, 2);
+  /* PWCTR5, 1, 2  */
+  args[0] = 0x01; args[1] = 0x00;
+  lcd_command_writen (PWCTR5, args, 2);
+  /* VMCTR1, 47h, 2ah  */
+  args[0] = 0x47; args[1] = 0x2a;
+  lcd_command_writen (VMCTR1, args, 2);
+  /* OSCADJ, 4ch  */
+  args[0] = 0x4c;
+  lcd_command_writen (OSCADJ, args, 1);
+  /* DEFADJ, 6  */
+  args[0] = 0x06;
+  lcd_command_writen (DEFADJ, args, 1);
+
+  /* gamma adjust  */
+
+  /* MADCTL, c0h  MY=1, MX=1  */
+  args[0] = 0xc0;
+  lcd_command_writen (MADCTL, args, 1);
+
+  /* Set RA and CA.  */
+  /* RASET, 0, 0, 0, 159  */
+  args[0] = 0x00; args[1] = 0x00; args[2] = 0x00; args[3] = LCD_ROW-1;
+  lcd_command_writen (RASET, args, 4);
+  /* CASET, 0, 0, 0, 127  */
+  args[0] = 0x00; args[1] = 0x00; args[2] = 0x00; args[3] = LCD_COLUMN-1;
+  lcd_command_writen (CASET, args, 4);
+
+  /* 0x06: RGB 6-6-6-bit.  */
+  args[0] = 0x06;
+  lcd_command_writen (COLMOD, args, 1);
+
+  args[0] = 0;
+  lcd_command_writen (TEON, args, 1);
+
+  lcd_command_no (DISPON);
+
+  /* Wait 20ms.  */
+  chopstx_usec_wait (20000);
+
+  chopstx_mutex_lock (&lcd_mtx);
+  chopstx_cond_signal (&lcd_cnd1);
+  chopstx_mutex_unlock (&lcd_mtx);
+
+  return NULL;
+}
+
+/* Plot a point with rgb color.  2 LSBs of rgb values will be ignored.  */
+void
+lcd_draw_point (int x, int y, int r, int g, int b)
+{
+  uint8_t args[4];
+
+  /* Set RA and CA.  */
+  /* RASET, 0, y, 0, y  */
+  args[0] = 0x00; args[1] = y; args[2] = 0x00; args[3] = y;
+  lcd_command_writen (RASET, args, 4);
+  /* CASET, 0, x, 0, x  */
+  args[0] = 0x00; args[1] = x; args[2] = 0x00; args[3] = x;
+  lcd_command_writen (CASET, args, 4);
+
+  args[0] = r; args[1] = g; args[2] = b; 
+  lcd_command_writen (RAMWR, args, 3);
+}
+
+static uint8_t hexfont5x8[16*5] = {
+  0x7e, 0x89, 0x91, 0xa1, 0x7e, /* 0 */
+  0x00, 0x41, 0xff, 0x01, 0x00, /* 1 */
+  0x43, 0x85, 0x89, 0x91, 0x61, /* 2 */
+  0x42, 0x81, 0x91, 0x91, 0x6e, /* 3 */
+  0x18, 0x28, 0x48, 0xff, 0x08, /* 4 */
+  0xf2, 0x91, 0x91, 0x91, 0x8e, /* 5 */
+  0x1e, 0x29, 0x49, 0x89, 0x86, /* 6 */
+  0x80, 0x8f, 0x90, 0xa0, 0xc0, /* 7 */
+  0x6e, 0x91, 0x91, 0x91, 0x6e, /* 8 */
+  0x70, 0x89, 0x89, 0x8a, 0x7c, /* 9 */
+  0x7f, 0x88, 0x88, 0x88, 0x7f, /* A */
+  0xff, 0x91, 0x91, 0x91, 0x6e, /* B */
+  0x7e, 0x81, 0x81, 0x81, 0x42, /* C */
+  0xff, 0x81, 0x81, 0x42, 0x3c, /* D */
+  0xff, 0x91, 0x91, 0x91, 0x81, /* E */
+  0xff, 0x90, 0x90, 0x90, 0x80, /* F */
+};
+
+/* Draw hex number with rgb color.  */
+void
+lcd_draw_hexfont5x8 (uint32_t hex, int x, int y, int r, int g, int b, int bg)
+{
+  int i, j;
+  uint8_t *p;
+  uint8_t args[5*8*3];
+
+  p = &hexfont5x8[(hex & 0xf)*5];
+
+  /* Set RA and CA.  */
+  /* RASET, 0, y, 0, y+8-1  */
+  args[0] = 0x00; args[1] = y; args[2] = 0x00; args[3] = y+7;
+  lcd_command_writen (RASET, args, 4);
+  /* CASET, 0, x, 0, x+5-1  */
+  args[0] = 0x00; args[1] = x; args[2] = 0x00; args[3] = x+4;
+  lcd_command_writen (CASET, args, 4);
+
+  for (i = 0; i < 5; i++)
+    {
+      uint8_t rb = *p++;
+      for (j = 0; j < 8; j++)
+	{
+	  int k = (5*j+i)*3;
+	  if (rb & (0x80 >> j))
+	    {
+	      args[k] = r; args[k+1] = g; args[k+2] = b;
+	    }
+	  else
+	    {
+	      args[k] = bg; args[k+1] = bg; args[k+2] = bg;
+	    }
+	}
+    }
+
+  lcd_command_writen (RAMWR, args, 5*8*3);
+}
+
+void
+lcd_printhex (uint32_t hex, int x, int y, int r, int g, int b, int bg)
+{
+  int i;
+
+  if (y < 0 || y >= LCD_ROW - 8)
+    return;
+  for (i = 7; i >= 0; i--)
+    {
+      lcd_draw_hexfont5x8 ((hex >> 4*i)&0xf, x, y, r, g, b, bg);
+      x += 5;
+      if (x >= LCD_COLUMN - 5)
+	break;
+    }
+}
+
+#define PRIO_LCD 3
+
+extern uint8_t __process1_stack_base__, __process1_stack_size__;
+const uint32_t __stackaddr_lcd = (uint32_t)&__process1_stack_base__;
+const size_t __stacksize_lcd = (size_t)&__process1_stack_size__;
+
+/* Initialize LCD.  */
+void
+lcd_init (void)
+{
+  chopstx_mutex_init (&lcd_mtx);
+  chopstx_cond_init (&lcd_cnd0);
+  chopstx_cond_init (&lcd_cnd1);
+
+  chopstx_create (PRIO_LCD, __stackaddr_lcd, __stacksize_lcd,
+		  lcd_initializer, NULL);
+
+  chopstx_usec_wait (200*1000);
+
+  chopstx_mutex_lock (&lcd_mtx);
+  chopstx_cond_signal (&lcd_cnd0);
+  chopstx_cond_wait (&lcd_cnd1, &lcd_mtx);
+  chopstx_mutex_unlock (&lcd_mtx);
+}
--- a/example-primer2/lcd.ld
+++ b/example-primer2/lcd.ld
@@ -0,0 +1,148 @@
+/*
+ * ST32F103 memory setup.
+ */
+__main_stack_size__      = 0x0100;      /* Exception handlers     */
+__process0_stack_size__  = 0x0200;      /* main */
+__process1_stack_size__  = 0x0100;      /* lcd init */
+__process2_stack_size__  = 0x0180;      /* rng */
+__process3_stack_size__  = 0x0100;      /* None yet */
+
+MEMORY
+{
+    flash0 : org = 0x08000000, len = 4k
+    flash : org = 0x08000000+0x1000, len = 512k - 4k
+    ram : org = 0x20000000, len = 64k
+}
+
+/* __flash_start__: flash ROM start address regardless of DFU_SUPPORT */
+__flash_start__         = 0x08001000;
+__flash_end__           = ORIGIN(flash) + LENGTH(flash);
+
+__ram_start__           = ORIGIN(ram);
+__ram_size__            = LENGTH(ram);
+__ram_end__             = __ram_start__ + __ram_size__;
+
+SECTIONS
+{
+    . = 0;
+
+    .sys : ALIGN(4) SUBALIGN(4)
+    {
+        _sys = .;
+        KEEP(*(.vectors))
+        . = ALIGN(16);
+        *(.sys.version)
+        build/sys.o(.text)
+        build/sys.o(.text.*)
+        build/sys.o(.rodata)
+        build/sys.o(.rodata.*)
+        . = ALIGN(1024);
+        *(.sys.0)
+        *(.sys.1)
+        *(.sys.2)
+    } > flash0
+
+    _text = .;
+
+    .startup : ALIGN(128) SUBALIGN(128)
+    {
+        KEEP(*(.startup.vectors))
+        . = ALIGN (16);
+    } > flash =0xffffffff
+
+    .text : ALIGN(16) SUBALIGN(16)
+    {
+        *(.text.startup.*)
+        *(.text)
+        *(.text.*)
+        *(.rodata)
+        *(.rodata.*)
+        *(.glue_7t)
+        *(.glue_7)
+        *(.gcc*)
+	. = ALIGN(8);
+    } > flash
+
+    .ARM.extab : {*(.ARM.extab* .gnu.linkonce.armextab.*)} > flash
+
+    .ARM.exidx : {
+        PROVIDE(__exidx_start = .);
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+        PROVIDE(__exidx_end = .);
+     } > flash
+
+    .eh_frame_hdr : {*(.eh_frame_hdr)} > flash
+
+    .eh_frame : ONLY_IF_RO {*(.eh_frame)} > flash
+
+    .textalign : ONLY_IF_RO { . = ALIGN(8); } > flash
+
+    _etext = .;
+    _textdata = _etext;
+
+    .stacks :
+    {
+        . = ALIGN(8);
+        __main_stack_base__ = .;
+        . += __main_stack_size__;
+        . = ALIGN(8);
+        __main_stack_end__ = .;
+        __process0_stack_base__ = .;
+        . += __process0_stack_size__;
+        . = ALIGN(8);
+        __process0_stack_end__ = .;
+        __process1_stack_base__ = .;
+        . += __process1_stack_size__;
+        . = ALIGN(8);
+        __process1_stack_end__ = .;
+        __process2_stack_base__ = .;
+        . += __process2_stack_size__;
+        . = ALIGN(8);
+        __process2_stack_end__ = .;
+        __process3_stack_base__ = .;
+        . += __process3_stack_size__;
+        . = ALIGN(8);
+        __process3_stack_end__ = .;
+    } > ram
+
+    .data :
+    {
+        . = ALIGN(4);
+        PROVIDE(_data = .);
+        *(.data)
+        . = ALIGN(4);
+        *(.data.*)
+        . = ALIGN(4);
+        *(.ramtext)
+        . = ALIGN(4);
+        PROVIDE(_edata = .);
+    } > ram AT > flash
+
+    .bss :
+    {
+        . = ALIGN(4);
+        PROVIDE(_bss_start = .);
+        *(.bss)
+        . = ALIGN(4);
+        *(.bss.*)
+        . = ALIGN(4);
+        *(COMMON)
+        . = ALIGN(4);
+        PROVIDE(_bss_end = .);
+    } > ram
+
+    PROVIDE(end = .);
+    _end            = .;
+    . = ALIGN(512);
+    /* reGNUal is now relocatable, it's OK not using fixed address. */
+    _regnual_start = .;
+
+    .fill_ffff :
+    {
+        . = ALIGN (2048);
+	*(.passwd)
+    } > flash =0xffffffff
+}
+
+__heap_base__   = _end;
+__heap_end__    = __ram_end__;
--- a/example-primer2/main.c
+++ b/example-primer2/main.c
@@ -0,0 +1,266 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chopstx.h>
+#include "neug.h"
+#include "sys.h" /* for set_led */
+#include "stm32f103.h"
+#include "adc.h"
+#include "st7732.h"
+#include "primer2-switches.h"
+#include "primer2-ts.h"
+#include "board.h"
+
+#ifdef TEST_DISPLAY_LOGO
+static uint8_t buf[LCD_COLUMN*LCD_ROW*BYTES_PER_PIXEL] = {
+#include "chopstx-logo.data"
+};
+
+void
+lcd_logo (void)
+{
+  uint8_t args[4];
+
+  /* Set RA and CA.  */
+  /* RASET, 0, 0, 0, 159  */
+  args[0] = 0x00; args[1] = 0; args[2] = 0x00; args[3] = LCD_ROW-1;
+  lcd_command_writen (RASET, args, 4);
+  /* CASET, 0, 0, 0, 127  */
+  args[0] = 0x00; args[1] = 0; args[2] = 0x00; args[3] = LCD_COLUMN-1;
+  lcd_command_writen (CASET, args, 4);
+
+  /* Write logo.  */
+  lcd_command_writen (RAMWR, buf, LCD_COLUMN*LCD_ROW*BYTES_PER_PIXEL);
+}
+#endif
+
+/* Table of 32*(cos, sin) for range 0 to pi/2 with step pi/256.  */
+static uint8_t ctable[128*2] = {
+32, 0, 31, 0, 31, 0, 31, 1, 31, 1, 31, 1, 31, 2, 31, 2,
+31, 3, 31, 3, 31, 3, 31, 4, 31, 4, 31, 5, 31, 5, 31, 5,
+31, 6, 31, 6, 31, 7, 31, 7, 31, 7, 30, 8, 30, 8, 30, 8,
+30, 9, 30, 9, 30, 10, 30, 10, 30, 10, 29, 11, 29, 11, 29, 11,
+29, 12, 29, 12, 29, 12, 29, 13, 28, 13, 28, 14, 28, 14, 28, 14,
+28, 15, 28, 15, 27, 15, 27, 16, 27, 16, 27, 16, 27, 17, 26, 17,
+26, 17, 26, 18, 26, 18, 25, 18, 25, 19, 25, 19, 25, 19, 24, 19,
+24, 20, 24, 20, 24, 20, 23, 21, 23, 21, 23, 21, 23, 22, 22, 22,
+22, 22, 22, 22, 22, 23, 21, 23, 21, 23, 21, 23, 20, 24, 20, 24,
+20, 24, 19, 24, 19, 25, 19, 25, 19, 25, 18, 25, 18, 26, 18, 26,
+17, 26, 17, 26, 17, 27, 16, 27, 16, 27, 16, 27, 15, 27, 15, 28,
+15, 28, 14, 28, 14, 28, 14, 28, 13, 28, 13, 29, 12, 29, 12, 29,
+12, 29, 11, 29, 11, 29, 11, 29, 10, 30, 10, 30, 10, 30, 9, 30,
+9, 30, 8, 30, 8, 30, 8, 30, 7, 31, 7, 31, 7, 31, 6, 31,
+6, 31, 5, 31, 5, 31, 5, 31, 4, 31, 4, 31, 3, 31, 3, 31,
+3, 31, 2, 31, 2, 31, 1, 31, 1, 31, 1, 31, 0, 31, 0, 31,
+};
+
+#ifdef TEST_LCD_CIRCLE
+void
+lcd_circle (void)
+{
+  int i, j;
+  uint8_t *p;
+  int x, y;
+
+  /* Clear display.  */
+  /* Set RA and CA.  */
+  /* RASET, 0, 0, 0, 159  */
+  args[0] = 0x00; args[1] = 0; args[2] = 0x00; args[3] = LCD_ROW-1;
+  lcd_command_writen (RASET, args, 4);
+  /* CASET, 0, 0, 0, 127  */
+  args[0] = 0x00; args[1] = 0; args[2] = 0x00; args[3] = LCD_COLUMN-1;
+  lcd_command_writen (CASET, args, 4);
+
+  lcd_command_writen (RAMWR, 0, LCD_COLUMN*LCD_ROW*BYTES_PER_PIXEL);
+
+  /* Draw a circle.  */
+  for (i = 0; i < 128; i++)
+    {
+      x = 64 + ctable[2*i];
+      y = 80 + ctable[2*i+1];
+      lcd_draw_point (x, y, 0xfc, 0xfc, 0xfc);
+    }
+  for (i = 0; i < 128; i++)
+    {
+      x = 64 - ctable[2*i+1];
+      y = 80 + ctable[2*i];
+      lcd_draw_point (x, y, 0xfc, 0, 0xfc);
+    }
+  for (i = 0; i < 128; i++)
+    {
+      x = 64 - ctable[2*i];
+      y = 80 - ctable[2*i+1];
+      lcd_draw_point (x, y, 0, 0xfc, 0xfc);
+    }
+  for (i = 0; i < 128; i++)
+    {
+      x = 64 + ctable[2*i+1];
+      y = 80 - ctable[2*i];
+      lcd_draw_point (x, y, 0xfc, 0xfc, 0);
+    }
+}
+#endif
+
+#define RANDOM_BYTES_LENGTH 64
+static uint32_t random_word[RANDOM_BYTES_LENGTH/sizeof (uint32_t)];
+
+int
+main (int argc, const char *argv[])
+{
+  int count;
+  int vx, vy;
+  int r, g, b;
+  uint8_t args[4];
+
+  (void)argc;
+  (void)argv;
+
+  set_led (1);
+  set_backlight (1);
+
+  adc_init ();
+  neug_init (random_word, RANDOM_BYTES_LENGTH/sizeof (uint32_t));
+
+  lcd_init ();
+
+#ifdef TEST_LCD_LOGO
+  lcd_logo ();
+
+  while (! joystick ())
+    chopstx_usec_wait (500*1000);
+#endif
+
+  /* Set RA and CA.  */
+  /* RASET, 0, 0, 0, 159  */
+  args[0] = 0x00; args[1] = 0; args[2] = 0x00; args[3] = LCD_ROW-1;
+  lcd_command_writen (RASET, args, 4);
+  /* CASET, 0, 0, 0, 127  */
+  args[0] = 0x00; args[1] = 0; args[2] = 0x00; args[3] = LCD_COLUMN-1;
+  lcd_command_writen (CASET, args, 4);
+
+  /* Fill display.  */
+  lcd_command_filln (RAMWR, 0xfc, LCD_COLUMN*LCD_ROW*BYTES_PER_PIXEL);
+
+  vx = (LCD_COLUMN/2) << 5;
+  vy = (LCD_ROW/2) << 5;
+  r = g = b = 0;
+#if 1
+  adc3_init ();
+  adc3_start ();
+
+  count = 0;
+  while (1)
+    {
+      uint32_t resv[4];
+
+      adc3_conversion (resv);
+      if (ts_pushed (resv[2]))
+	{
+	  int reg[3], point[2];
+
+	  ts_conversion (resv, reg);
+#if 0
+	  lcd_printhex (reg[0], 5,  8, 0x00, 0x00, 0xfc, 0xfc);
+	  lcd_printhex (reg[1], 5,  18, 0x00, 0x00, 0xfc, 0xfc);
+	  lcd_printhex (reg[2], 5,  28, 0x00, 0x00, 0xfc, 0xfc);
+#endif
+	  if (!ts_adjust (reg, point))
+	    {
+	      chopstx_usec_wait (50*1000);
+	      continue;
+	    }
+
+	  lcd_draw_point (point[0], point[1], r, g, b);
+	}
+      else
+	ts_adjust (NULL, NULL);
+
+      chopstx_usec_wait (50*1000);
+      count++;
+      if ((count/10) & 1)
+	set_led (0);
+      else
+	set_led (1);
+      if (pbutton())
+	break;
+    }
+
+  adc3_stop ();
+#endif
+
+  count = 0;
+  while (1)
+    {
+      int jo;
+      uint32_t th = neug_get (NEUG_KICK_FILLING) & 0x1ff;
+
+      /* Get random point on a circle with the radius of 32 and walk
+	 towards it.  */
+      if (th < 128)
+	{
+	  vx += ctable[2*th];
+	  vy += ctable[2*th+1];
+	}
+      else if (th < 256)
+	{
+	  vx -= ctable[2*(th & 0x7f)+1];
+	  vy += ctable[2*(th & 0x7f)];
+	}
+      else if (th < 384)
+	{
+	  vx -= ctable[2*(th & 0x7f)];
+	  vy -= ctable[2*(th & 0x7f)+1];
+	}
+      else
+	{
+	  vx += ctable[2*(th & 0x7f)+1];
+	  vy -= ctable[2*(th & 0x7f)];
+	}
+
+      if (vx < 0)
+	vx += (LCD_COLUMN << 5);
+      if (vy < 0)
+	vy += (LCD_ROW << 5);
+
+      /* Change draw color with joystick.  */
+      jo = joystick ();
+      if (JOYSTICK_L (jo))
+	r = 0xfc;
+      if (JOYSTICK_R (jo))
+	g = 0xfc;
+      if (JOYSTICK_U (jo))
+	b = 0xfc;
+      if (JOYSTICK_D (jo))
+	r = g = b = 0;
+
+      /* 2-dim random walk on torus.  */
+      lcd_draw_point ((vx>>5)%LCD_COLUMN, (vy>>5)%LCD_ROW, r, g, b);
+      chopstx_usec_wait (10*1000);
+
+      if (pbutton ())
+	count++;
+      /* Shutdown when p-button is held down for 5 sec.  */
+      if (count > 500)
+	{
+	  set_led (0);
+	  shutdown ();
+	}
+      else
+	{
+	  /* Disable backlight when p-button is held down for 3 sec.  */
+	  if (count > 300)
+	    set_backlight (0);
+
+	  /* Blink led when p-button is held.  */
+	  if ((count/50) & 1)
+	    set_led (0);
+	  else
+	    set_led (1);
+	}
+#if 1
+      lcd_printhex (count, 5,  8, 0x00, 0x00, 0xfc, 0xfc);
+#endif
+
+    }
+
+  return 0;
+}
--- a/example-primer2/primer2-switches.c
+++ b/example-primer2/primer2-switches.c
@@ -0,0 +1,73 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chopstx.h>
+#include "board.h"
+
+#define PERIPH_BASE	0x40000000
+#define APBPERIPH_BASE   PERIPH_BASE
+#define APB2PERIPH_BASE	(PERIPH_BASE + 0x10000)
+
+struct GPIO {
+  volatile uint32_t CRL;
+  volatile uint32_t CRH;
+  volatile uint32_t IDR;
+  volatile uint32_t ODR;
+  volatile uint32_t BSRR;
+  volatile uint32_t BRR;
+  volatile uint32_t LCKR;
+};
+
+#define GPIOA_BASE	(APB2PERIPH_BASE + 0x0800)
+#define GPIOA		((struct GPIO *) GPIOA_BASE)
+#define GPIOB_BASE	(APB2PERIPH_BASE + 0x0C00)
+#define GPIOB		((struct GPIO *) GPIOB_BASE)
+#define GPIOC_BASE	(APB2PERIPH_BASE + 0x1000)
+#define GPIOC		((struct GPIO *) GPIOC_BASE)
+#define GPIOD_BASE	(APB2PERIPH_BASE + 0x1400)
+#define GPIOD		((struct GPIO *) GPIOD_BASE)
+#define GPIOE_BASE	(APB2PERIPH_BASE + 0x1800)
+#define GPIOE		((struct GPIO *) GPIOE_BASE)
+
+static struct GPIO *const GPIO_STICK = ((struct GPIO *const) GPIO_LED_BASE);
+static struct GPIO *const GPIO_OTHER = ((struct GPIO *const) GPIO_OTHER_BASE);
+static struct GPIO *const GPIO_OTHER1 = ((struct GPIO *const) GPIOC_BASE);
+static struct GPIO *const GPIO_OTHER2 = ((struct GPIO *const) GPIOB_BASE);
+
+#define GPIO_STICK_L	3
+#define GPIO_STICK_R	4
+#define GPIO_STICK_U	5
+#define GPIO_STICK_D	6
+#define GPIO_SHUTDOWN	13
+#define GPIO_PBUTTON	8
+#define GPIO_BACKLIGHT	8
+
+void
+shutdown (void)
+{
+  GPIO_OTHER1->BRR = (1 << GPIO_SHUTDOWN);
+  GPIO_OTHER1->BSRR = (1 << GPIO_SHUTDOWN);
+
+  while (1)
+    chopstx_usec_wait (500*1000);
+}
+
+void
+set_backlight (int on)
+{
+  if (on)
+    GPIO_OTHER2->BSRR = (1 << GPIO_BACKLIGHT);
+  else
+    GPIO_OTHER2->BRR = (1 << GPIO_BACKLIGHT);
+}
+
+int
+joystick (void)
+{
+  return (GPIO_STICK->IDR >> GPIO_STICK_L) & 0xf;
+}
+
+int
+pbutton (void)
+{
+  return (GPIO_OTHER->IDR >> GPIO_PBUTTON) & 1;
+}
--- a/example-primer2/primer2-switches.h
+++ b/example-primer2/primer2-switches.h
@@ -0,0 +1,9 @@
+extern void shutdown (void);
+extern void set_backlight (int on);
+extern int pbutton (void);
+extern int joystick (void);
+
+#define JOYSTICK_L(x) ((x) & 1)
+#define JOYSTICK_R(x) ((x) & 2)
+#define JOYSTICK_U(x) ((x) & 4)
+#define JOYSTICK_D(x) ((x) & 8)
--- a/example-primer2/primer2-ts.c
+++ b/example-primer2/primer2-ts.c
@@ -0,0 +1,223 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chopstx.h>
+#include "stm32f103.h"
+#include "st7732.h"
+#include "primer2-ts.h"
+
+/* ADC3 routines.  */
+
+#define ADC3_BASE		(APB2PERIPH_BASE + 0x3c00)
+static struct ADC *const ADC3 = (struct ADC *const)ADC3_BASE;
+
+#define RCC_APB2ENR_ADC3EN	0x8000
+#define RCC_APB2RSTR_ADC3RST	0x8000
+
+#define ADC_SR_JEOC		0x0004
+
+#define ADC_CR1_JEOCIE		(1 << 7)
+
+#define ADC_CR2_JSWSTART	(1 << 21)
+#define ADC_CR2_JEXTTRIG        (1 << 15)
+#define ADC_CR2_JEXTSEL(n)	((n) << 12)
+
+#define ADC_JSQR_NUM_CH(n)      (((n) - 1) << 20)
+#define ADC_JSQR_JSQ1_N(n)      ((n) << 0)
+#define ADC_JSQR_JSQ2_N(n)      ((n) << 5)
+#define ADC_JSQR_JSQ3_N(n)      ((n) << 10)
+#define ADC_JSQR_JSQ4_N(n)      ((n) << 15)
+
+#define ADC_CHANNEL_IN10        10
+#define ADC_CHANNEL_IN11        11
+#define ADC_CHANNEL_IN12        12
+#define ADC_CHANNEL_IN13        13
+
+#define USE_ADC3_INTR		1
+#define INTR_REQ_ADC3		47
+
+/*
+ * Do calibration for ADC3.
+ */
+void adc3_init (void)
+{
+  RCC->APB2ENR |= RCC_APB2ENR_ADC3EN;
+  RCC->APB2RSTR = RCC_APB2RSTR_ADC3RST;
+  RCC->APB2RSTR = 0;
+
+  ADC3->CR1 = 0;
+  ADC3->CR2 = ADC_CR2_ADON;
+  ADC3->CR2 = ADC_CR2_ADON | ADC_CR2_RSTCAL;
+  while ((ADC3->CR2 & ADC_CR2_RSTCAL) != 0)
+    ;
+  ADC3->CR2 = ADC_CR2_ADON | ADC_CR2_CAL;
+  while ((ADC3->CR2 & ADC_CR2_CAL) != 0)
+    ;
+  ADC3->CR2 = 0;
+  RCC->APB2ENR &= ~RCC_APB2ENR_ADC3EN;
+}
+
+static chopstx_intr_t adc3_intr;
+
+void
+adc3_start (void)
+{
+  RCC->APB2ENR |= RCC_APB2ENR_ADC3EN;
+
+#if USE_ADC3_INTR
+  ADC3->CR1 = ADC_CR1_SCAN | ADC_CR1_JEOCIE;
+#else
+  ADC3->CR1 = ADC_CR1_SCAN;
+#endif
+  ADC3->CR2 = ADC_CR2_JEXTTRIG | ADC_CR2_JEXTSEL(7) | ADC_CR2_ADON;
+  ADC3->SMPR1 = 0xfff;
+  ADC3->SMPR2 = 0;
+  ADC3->JSQR = (ADC_JSQR_NUM_CH(4) | ADC_JSQR_JSQ4_N(ADC_CHANNEL_IN13)
+		| ADC_JSQR_JSQ3_N(ADC_CHANNEL_IN12)
+		| ADC_JSQR_JSQ2_N(ADC_CHANNEL_IN11)
+		| ADC_JSQR_JSQ1_N(ADC_CHANNEL_IN10));
+
+#if USE_ADC3_INTR
+  chopstx_claim_irq (&adc3_intr, INTR_REQ_ADC3);
+#endif
+}
+
+void adc3_conversion (uint32_t *result)
+{
+
+  /* Start conversion.  */
+  ADC3->CR2 |= ADC_CR2_JSWSTART;
+
+#if USE_ADC3_INTR
+  chopstx_intr_wait (&adc3_intr);
+#else
+  while (1)
+    {
+      chopstx_usec_wait (1000);
+      if (ADC3->SR & ADC_SR_JEOC)
+	break;
+    }
+#endif
+  ADC3->SR &= ~ADC_SR_JEOC;
+
+  result[0] = ADC3->JDR1;
+  result[1] = ADC3->JDR2;
+  result[2] = ADC3->JDR3;
+  result[3] = ADC3->JDR4;
+
+  /* Stop conversion.  */
+  ADC3->CR2 &= ~ADC_CR2_JSWSTART;
+
+  return;
+}
+
+void adc3_stop (void)
+{
+
+#if USE_ADC3_INTR
+  chopstx_release_irq (&adc3_intr);
+#endif
+
+  /* Power off.  */
+  ADC3->CR1 = 0;
+  ADC3->CR2 = 0;
+
+  RCC->APB2ENR &= ~RCC_APB2ENR_ADC3EN;
+}
+
+/* Touch screen routines.  */
+
+int
+ts_pushed (uint32_t u)
+{
+  return (u < 0xc00);
+}
+
+#define FILTER_SIZE	8
+
+static void
+ts_filter (int buf[FILTER_SIZE][2], int result[2])
+{
+  int s0, s1;
+  int i;
+
+  s0 = 0;
+  s1 = 0;
+  for (i = 0; i < FILTER_SIZE; i++)
+    {
+      s0 += buf[i][0];
+      s1 += buf[i][1];
+    }
+
+  result[0] = s0/FILTER_SIZE;
+  result[1] = s1/FILTER_SIZE;
+}
+
+/* Simple model of primer2 touch screen:
+    Vdd-[R1]-[Ry]-[Rp]-[Rx]-Vss
+            U    D    l    R
+   where R1=1k external register, Rx(resp. Ry)=resisitive component on
+   X(resp. Y) film and Rp=resisitive component of contact point.
+   Convert [L, R, U, D] to [Rx, Ry, Rp].  */
+void
+ts_conversion (uint32_t a[], int r[])
+{
+  int l, u, d, ir1;
+  int x, y, rp;
+
+  l = a[0] & 0xfff;
+  u = a[2] & 0xfff;
+  d = a[3] & 0xfff;
+  ir1 = 4096 - u;
+  /* r1 = 1000 */
+  x = (1000 * l)/ir1;
+  y = (1000 * (u - d))/ir1;
+  rp = (1000 * (d - l))/ir1;
+  r[0] = x;
+  r[1] = y;
+  r[2] = rp;
+}
+
+int
+ts_adjust (int *r, int *cord)
+{
+  int x, y;
+  static int buf[FILTER_SIZE][2];
+  static int i = 0;
+  static int fill = 0;
+
+  if (!r)
+    {
+      i = 0;
+      fill = 0;
+      return 0;
+    }
+
+  /* TODO: We might need calibration.  */
+  x = (LCD_COLUMN * (r[0] - 0x20))/0x100;
+  y = (LCD_ROW * (0x1e0 - r[1]))/0x1c0;
+
+  if (x < 0)
+    x = 0;
+  if (x >= LCD_COLUMN)
+    x = LCD_COLUMN - 1;
+  if (y < 0)
+    y = 0;
+  if (y >= LCD_ROW)
+    y = LCD_ROW - 1;
+
+  buf[i][0] = x;
+  buf[i][1] = y;
+
+  i++;
+  if (i >= FILTER_SIZE)
+    {
+      i = 0;
+      fill = 1;
+    }
+
+  if (!fill)
+    return 0;
+
+  ts_filter (buf, cord);
+  return 1;
+}
--- a/example-primer2/primer2-ts.h
+++ b/example-primer2/primer2-ts.h
@@ -0,0 +1,8 @@
+extern void adc3_init (void);
+extern void adc3_start (void);
+extern void adc3_conversion (uint32_t *result);
+extern void adc3_stop (void);
+
+extern int ts_pushed (uint32_t u);
+extern void ts_conversion (uint32_t a[], int r[]);
+extern int ts_adjust (int r[], int cord[]);
--- a/example-primer2/st7732.h
+++ b/example-primer2/st7732.h
@@ -0,0 +1,83 @@
+/* ST7732 LCD driver chip command byte.
+  command_name = value  read_n_bytes:write_n_bytes: simple description  */
+enum st7732_cmd {
+  NOP = 0x00,		/* 0:0: No Operatin */
+  SWRESET = 0x01,	/* 0:0: Software reset */
+  RDDID = 0x04,		/* 0:3: Read Display ID */
+  RDRST = 0x09,		/* 0:4: Read Display Status */
+  RDDPM = 0x0a,		/* 0:1: Read Display Power Mode */
+  RDD_MADCTL = 0x0b,	/* 0:1: Read Display MADCTL */
+  RDD_COLMOD = 0x0c,	/* 0:1: Read Display Pixel Format */
+  RDDIM = 0x0d,		/* 0:1: Read Display Image Mode */
+  RDDSM = 0x0e,		/* 0:1: Read Display Signal Mode */
+  RDDSDR = 0x0f,	/* 0:1: Read Display Self-diagnostic result */
+  SLPIN = 0x10,		/* 0:0: Sleep in & booster off */
+  SLPOUT = 0x11,	/* 0:0: Sleep out & booster on */
+  PTLON = 0x12,		/* 0:0: Pertial mode on */
+  NORON = 0x13,		/* 0:0: Normal mode on (Pertial off) */
+  INVOFF = 0x20,	/* 0:0: Display inversion off */
+  INVON = 0x21,		/* 0:0: Display inversion on */
+  GAMSET = 0x26,	/* 1:0: Gamma curve select */
+  DISPOFF = 0x28,	/* 0:0: Display off */
+  DISPON = 0x29,	/* 0:0: Display on */
+  CASET = 0x2a,		/* 4:0: Column address set */
+  RASET = 0x2b,		/* 4:0: Raw address set */
+  RAMWR = 0x2c,		/* 1:0: Memory write */
+  RAMRD = 0x2e,		/* 0:1: Memory read */
+  PTLAR = 0x30,		/* 4:0: Partial start/end address set */
+  SCRLAR = 0x33,	/* 6:0: Scroll area set */
+  TEOFF = 0x34,		/* 0:0: Tearing effect line off */
+  TEON = 0x35,		/* 1:0: Tearing effect mode set & on */
+  MADCTL = 0x36,	/* 1:0: Memory data access control */
+  VSCSAD = 0x37,	/* 2:0: Scroll start address of RAM */
+  IDMOFF = 0x38,	/* 0:0: Idle mode off */
+  IDMON = 0x39,		/* 0:0: Idle mode on */
+  COLMOD = 0x3a,	/* 1:0: Interface pixel format */
+  RDID1 = 0xda,		/* 0:1: Read ID1 */
+  RDID2 = 0xdb,		/* 0:1: Read ID2 */
+  RDID3 = 0xdc,		/* 0:1: Read ID3 */
+  RGBCTR = 0xb0,	/* 1:0: Set RGB signal control */
+  FRMCTR1 = 0xb1,	/* 3:0: In normal mode */
+  FRMCTR2 = 0xb2,	/* 3:0: In Idel mode (8-colors) */
+  FRMCTR3 = 0xb3,	/* 6:0: In partial mode + Full colors */
+  INVCTR = 0xb4,	/* 1:0: Display inversion control */
+  RGB_BPCTR = 0xb5,	/* 4:0: RGB I/F Blanking porch setting */
+  DISSET5 = 0xb6,	/* 2:0: Display function setting */
+  PWCTR1 = 0xc0,	/* 2:0: Power control setting */
+  PWCTR2 = 0xc1,	/* 1:0: Power control setting */
+  PWCTR3 = 0xc2,	/* 2:0: Power control setting (Full colors) */
+  PWCTR4 = 0xc3,	/* 2:0: Power control setting (8-colors) */
+  PWCTR5 = 0xc4,	/* 2:0: Power control setting (In partial mode) */
+  VMCTR1 = 0xc5,	/* 2:0: VCOM control */
+  VMOFCTR = 0xc6,	/* 1:0: VCOM offset control */
+  WRID2 = 0xd1,		/* 1:0: Write ID2 value to NV */
+  WRID3 = 0xd2,		/* 1:0: Write ID3 value to NV */
+  RDID4 = 0xd3,		/* 0:4: IC Vender code */
+  NVCTR1 = 0xd9,	/* 0:1:no-fummy NVM control status */
+  NVCTR2 = 0xde,	/* 3:0: NVM read command (aa, 0f, a5) */
+  NVCTR3 = 0xdf,	/* 3:0: NVM write command (55, f0, 5a) */
+  GAMCTRP1 = 0xe0,	/* 13:0: Set Gamma correction + */
+  GAMCTRN1 = 0xe1,	/* 13:0: Set Gamma correction - */
+  AUTO_CTRL = 0xf1,	/* 1:0: NVM write function ON/OFF */
+  OSCADJ = 0xf2,	/* 1:0: Osillator frequency setting */
+  DISPCTRL = 0xf5,	/* 1:0: Display function control */
+  DEFADJ = 0xf6,	/* 1:0: Default mode setting */
+};
+
+typedef enum st7732_cmd st7732_cmd_t;
+
+extern void lcd_command_no (st7732_cmd_t cmd);
+extern void lcd_command_readn (st7732_cmd_t cmd, uint8_t *p, size_t n);
+extern void lcd_command_writen (st7732_cmd_t cmd, uint8_t *p, size_t n);
+extern void lcd_command_filln (st7732_cmd_t cmd, uint8_t b, size_t n);
+extern void lcd_init (void);
+
+extern void lcd_draw_point (int x, int y, int r, int g, int b);
+extern void lcd_draw_hexfont5x8 (uint32_t hex, int x, int y, int r, int g,
+				 int b, int bg);
+extern void lcd_printhex (uint32_t hex, int x, int y, int r, int g, int b,
+			  int bg);
+
+#define LCD_COLUMN	128
+#define LCD_ROW		160
+#define BYTES_PER_PIXEL	3
--- a/example-primer2/sys.c
+++ b/example-primer2/sys.c
@@ -0,0 +1,467 @@
+/*
+ * sys.c - system routines for the initial page for STM32F103.
+ *
+ * Copyright (C) 2013, 2014, 2015 Flying Stone Technology
+ * Author: NIIBE Yutaka <gniibe@fsij.org>
+ *
+ * Copying and distribution of this file, with or without modification,
+ * are permitted in any medium without royalty provided the copyright
+ * notice and this notice are preserved.  This file is offered as-is,
+ * without any warranty.
+ *
+ * When the flash ROM is protected, we cannot modify the initial page.
+ * We put some system routines (which is useful for any program) here.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include "board.h"
+
+/* Adds port C for shutdown function.  */
+#undef RCC_ENR_IOP_EN
+#undef RCC_RSTR_IOP_RST
+#define RCC_ENR_IOP_EN \
+        (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPDEN | RCC_APB2ENR_IOPEEN \
+	 | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPBEN)
+#define RCC_RSTR_IOP_RST \
+        (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPDRST | RCC_APB2RSTR_IOPERST \
+	 | RCC_APB2RSTR_IOPCRST | RCC_APB2RSTR_IOPBRST)
+
+#include "clk_gpio_init.c"
+
+static struct GPIO *const GPIO_OTHER1 = ((struct GPIO *const) GPIOC_BASE);
+static struct GPIO *const GPIO_OTHER2 = ((struct GPIO *const) GPIOB_BASE);
+
+static void __attribute__((used))
+gpio_init_primer2 (void)
+{
+  gpio_init ();
+
+  /*
+   * Port C setup.
+   * Everything input with pull-up except:
+   * PC0  - Analog input (Touch panel L X+)
+   * PC1  - Analog input (Touch panel R X-)
+   * PC2  - Analog input (Touch panel U Y+)
+   * PC3  - Analog input (Touch panel D Y-)
+   * PC6  - Normal input because there is an external resistor.
+   * PC7  - Normal input because there is an external resistor.
+   * PC13 - Push Pull output (SHUTDOWN)
+   */
+  GPIO_OTHER1->ODR = 0xffffdfff;
+  GPIO_OTHER1->CRL = 0x44880000;
+  GPIO_OTHER1->CRH = 0x88388888;
+
+  /*
+   * Port B setup.
+   * Everything input with pull-up except:
+   * PB8  - Backlight enable output.
+   * PB13 - Alternate output  (AUDIO SPI2 SCK).
+   * PB14 - Normal input      (AUDIO SPI2 MISO).
+   * PB15 - Alternate output  (AUDIO SPI2 MOSI).
+   */
+  GPIO_OTHER2->ODR = 0xffffffff;
+  GPIO_OTHER2->CRL = 0x88888888;
+  GPIO_OTHER2->CRH = 0xb4b88883;
+}
+
+#define CORTEX_PRIORITY_BITS    4
+#define CORTEX_PRIORITY_MASK(n)  ((n) << (8 - CORTEX_PRIORITY_BITS))
+#define USB_LP_CAN1_RX0_IRQn	 20
+#define STM32_USB_IRQ_PRIORITY   11
+
+struct NVIC {
+  uint32_t ISER[8];
+  uint32_t unused1[24];
+  uint32_t ICER[8];
+  uint32_t unused2[24];
+  uint32_t ISPR[8];
+  uint32_t unused3[24];
+  uint32_t ICPR[8];
+  uint32_t unused4[24];
+  uint32_t IABR[8];
+  uint32_t unused5[56];
+  uint32_t IPR[60];
+};
+
+static struct NVIC *const NVICBase = ((struct NVIC *const)0xE000E100);
+#define NVIC_ISER(n)	(NVICBase->ISER[n >> 5])
+#define NVIC_ICPR(n)	(NVICBase->ICPR[n >> 5])
+#define NVIC_IPR(n)	(NVICBase->IPR[n >> 2])
+
+static void
+nvic_enable_vector (uint32_t n, uint32_t prio)
+{
+  unsigned int sh = (n & 3) << 3;
+
+  NVIC_IPR (n) = (NVIC_IPR(n) & ~(0xFF << sh)) | (prio << sh);
+  NVIC_ICPR (n) = 1 << (n & 0x1F);
+  NVIC_ISER (n) = 1 << (n & 0x1F);
+}
+
+static void
+usb_cable_config (int enable)
+{
+#if defined(GPIO_USB_SET_TO_ENABLE)
+  if (enable)
+    GPIO_USB->BSRR = (1 << GPIO_USB_SET_TO_ENABLE);
+  else
+    GPIO_USB->BRR = (1 << GPIO_USB_SET_TO_ENABLE);
+#elif defined(GPIO_USB_CLEAR_TO_ENABLE)
+  if (enable)
+    GPIO_USB->BRR = (1 << GPIO_USB_CLEAR_TO_ENABLE);
+  else
+    GPIO_USB->BSRR = (1 << GPIO_USB_CLEAR_TO_ENABLE);
+#else
+  (void)enable;
+#endif
+}
+
+void
+set_led (int on)
+{
+#if defined(GPIO_LED_CLEAR_TO_EMIT)
+  if (on)
+    GPIO_LED->BRR = (1 << GPIO_LED_CLEAR_TO_EMIT);
+  else
+    GPIO_LED->BSRR = (1 << GPIO_LED_CLEAR_TO_EMIT);
+#else
+  if (on)
+    GPIO_LED->BSRR = (1 << GPIO_LED_SET_TO_EMIT);
+  else
+    GPIO_LED->BRR = (1 << GPIO_LED_SET_TO_EMIT);
+#endif
+}
+
+static void wait (int count)
+{
+  int i;
+
+  for (i = 0; i < count; i++)
+    asm volatile ("" : : "r" (i) : "memory");
+}
+
+
+static void
+usb_lld_sys_shutdown (void)
+{
+  RCC->APB1ENR &= ~RCC_APB1ENR_USBEN;
+  RCC->APB1RSTR = RCC_APB1RSTR_USBRST;
+  usb_cable_config (0);
+}
+
+static void
+usb_lld_sys_init (void)
+{
+  if ((RCC->APB1ENR & RCC_APB1ENR_USBEN)
+      && (RCC->APB1RSTR & RCC_APB1RSTR_USBRST) == 0)
+    /* Make sure the device is disconnected, even after core reset.  */
+    {
+      usb_lld_sys_shutdown ();
+      /* Disconnect requires SE0 (>= 2.5uS).  */
+      wait (300);
+    }
+
+  usb_cable_config (1);
+  RCC->APB1ENR |= RCC_APB1ENR_USBEN;
+  nvic_enable_vector (USB_LP_CAN1_RX0_IRQn,
+		      CORTEX_PRIORITY_MASK (STM32_USB_IRQ_PRIORITY));
+  /*
+   * Note that we also have other IRQ(s):
+   * 	USB_HP_CAN1_TX_IRQn (for double-buffered or isochronous)
+   * 	USBWakeUp_IRQn (suspend/resume)
+   */
+  RCC->APB1RSTR = RCC_APB1RSTR_USBRST;
+  RCC->APB1RSTR = 0;
+}
+
+#define FLASH_KEY1               0x45670123UL
+#define FLASH_KEY2               0xCDEF89ABUL
+
+enum flash_status
+{
+  FLASH_BUSY = 1,
+  FLASH_ERROR_PG,
+  FLASH_ERROR_WRP,
+  FLASH_COMPLETE,
+  FLASH_TIMEOUT
+};
+
+static void __attribute__ ((used))
+flash_unlock (void)
+{
+  FLASH->KEYR = FLASH_KEY1;
+  FLASH->KEYR = FLASH_KEY2;
+}
+
+
+#define intr_disable()  asm volatile ("cpsid   i" : : : "memory")
+#define intr_enable()  asm volatile ("cpsie   i" : : : "memory")
+
+#define FLASH_SR_BSY		0x01
+#define FLASH_SR_PGERR		0x04
+#define FLASH_SR_WRPRTERR	0x10
+#define FLASH_SR_EOP		0x20
+
+#define FLASH_CR_PG	0x0001
+#define FLASH_CR_PER	0x0002
+#define FLASH_CR_MER	0x0004
+#define FLASH_CR_OPTPG	0x0010
+#define FLASH_CR_OPTER	0x0020
+#define FLASH_CR_STRT	0x0040
+#define FLASH_CR_LOCK	0x0080
+#define FLASH_CR_OPTWRE	0x0200
+#define FLASH_CR_ERRIE	0x0400
+#define FLASH_CR_EOPIE	0x1000
+
+static int
+flash_wait_for_last_operation (uint32_t timeout)
+{
+  int status;
+
+  do
+    {
+      status = FLASH->SR;
+      if (--timeout == 0)
+	break;
+    }
+  while ((status & FLASH_SR_BSY) != 0);
+
+  return status & (FLASH_SR_BSY|FLASH_SR_PGERR|FLASH_SR_WRPRTERR);
+}
+
+#define FLASH_PROGRAM_TIMEOUT 0x00010000
+#define FLASH_ERASE_TIMEOUT   0x01000000
+
+static int
+flash_program_halfword (uint32_t addr, uint16_t data)
+{
+  int status;
+
+  status = flash_wait_for_last_operation (FLASH_PROGRAM_TIMEOUT);
+
+  intr_disable ();
+  if (status == 0)
+    {
+      FLASH->CR |= FLASH_CR_PG;
+
+      *(volatile uint16_t *)addr = data;
+
+      status = flash_wait_for_last_operation (FLASH_PROGRAM_TIMEOUT);
+      FLASH->CR &= ~FLASH_CR_PG;
+    }
+  intr_enable ();
+
+  return status;
+}
+
+static int
+flash_erase_page (uint32_t addr)
+{
+  int status;
+
+  status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT);
+
+  intr_disable ();
+  if (status == 0)
+    {
+      FLASH->CR |= FLASH_CR_PER;
+      FLASH->AR = addr;
+      FLASH->CR |= FLASH_CR_STRT;
+
+      status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT);
+      FLASH->CR &= ~FLASH_CR_PER;
+    }
+  intr_enable ();
+
+  return status;
+}
+
+static int
+flash_check_blank (const uint8_t *p_start, size_t size)
+{
+  const uint8_t *p;
+
+  for (p = p_start; p < p_start + size; p++)
+    if (*p != 0xff)
+      return 0;
+
+  return 1;
+}
+
+extern uint8_t __flash_start__, __flash_end__;
+
+static int
+flash_write (uint32_t dst_addr, const uint8_t *src, size_t len)
+{
+  int status;
+  uint32_t flash_start = (uint32_t)&__flash_start__;
+  uint32_t flash_end = (uint32_t)&__flash_end__;
+
+  if (dst_addr < flash_start || dst_addr + len > flash_end)
+    return 0;
+
+  while (len)
+    {
+      uint16_t hw = *src++;
+
+      hw |= (*src++ << 8);
+      status = flash_program_halfword (dst_addr, hw);
+      if (status != 0)
+	return 0;		/* error return */
+
+      dst_addr += 2;
+      len -= 2;
+    }
+
+  return 1;
+}
+
+#define OPTION_BYTES_ADDR 0x1ffff800
+
+static int
+flash_protect (void)
+{
+  int status;
+  uint32_t option_bytes_value;
+
+  status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT);
+
+  intr_disable ();
+  if (status == 0)
+    {
+      FLASH->OPTKEYR = FLASH_KEY1;
+      FLASH->OPTKEYR = FLASH_KEY2;
+
+      FLASH->CR |= FLASH_CR_OPTER;
+      FLASH->CR |= FLASH_CR_STRT;
+
+      status = flash_wait_for_last_operation (FLASH_ERASE_TIMEOUT);
+      FLASH->CR &= ~FLASH_CR_OPTER;
+    }
+  intr_enable ();
+
+  if (status != 0)
+    return 0;
+
+  option_bytes_value = *(uint32_t *)OPTION_BYTES_ADDR;
+  return (option_bytes_value & 0xff) == 0xff ? 1 : 0;
+}
+
+static void __attribute__((naked))
+flash_erase_all_and_exec (void (*entry)(void))
+{
+  uint32_t addr = (uint32_t)&__flash_start__;
+  uint32_t end = (uint32_t)&__flash_end__;
+  int r;
+
+  while (addr < end)
+    {
+      r = flash_erase_page (addr);
+      if (r != 0)
+	break;
+
+      addr += FLASH_PAGE_SIZE;
+    }
+
+  if (addr >= end)
+    (*entry) ();
+
+  for (;;);
+}
+
+struct SCB
+{
+  volatile uint32_t CPUID;
+  volatile uint32_t ICSR;
+  volatile uint32_t VTOR;
+  volatile uint32_t AIRCR;
+  volatile uint32_t SCR;
+  volatile uint32_t CCR;
+  volatile uint8_t  SHP[12];
+  volatile uint32_t SHCSR;
+  volatile uint32_t CFSR;
+  volatile uint32_t HFSR;
+  volatile uint32_t DFSR;
+  volatile uint32_t MMFAR;
+  volatile uint32_t BFAR;
+  volatile uint32_t AFSR;
+  volatile uint32_t PFR[2];
+  volatile uint32_t DFR;
+  volatile uint32_t ADR;
+  volatile uint32_t MMFR[4];
+  volatile uint32_t ISAR[5];
+};
+
+#define SCS_BASE	(0xE000E000)
+#define SCB_BASE	(SCS_BASE +  0x0D00)
+static struct SCB *const SCB = ((struct SCB *const) SCB_BASE);
+
+#define SYSRESETREQ 0x04
+static void
+nvic_system_reset (void)
+{
+  SCB->AIRCR = (0x05FA0000 | (SCB->AIRCR & 0x70) | SYSRESETREQ);
+  asm volatile ("dsb");
+  for (;;);
+}
+
+static void __attribute__ ((naked))
+reset (void)
+{
+  extern const unsigned long *FT0, *FT1, *FT2;
+
+  /*
+   * This code may not be at the start of flash ROM, because of DFU.
+   * So, we take the address from PC.
+   */
+  asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
+		"ldr	r0, 1f\n\t"     /* r0 = SCR */
+		"mov	r1, pc\n\t"	/* r1 = (PC + 0x1000) & ~0x0fff */
+		"mov	r2, #0x1000\n\t"
+		"add	r1, r1, r2\n\t"
+		"sub	r2, r2, #1\n\t"
+		"bic	r1, r1, r2\n\t"
+		"str	r1, [r0, #8]\n\t"	/* Set SCR->VCR */
+		"ldr	r0, [r1], #4\n\t"
+		"msr	MSP, r0\n\t"	/* Main (exception handler) stack. */
+		"ldr	r0, [r1]\n\t"	/* Reset handler.                  */
+		"bx	r0\n\t"
+		".align	2\n"
+	"1:	.word	0xe000ed00"
+		: /* no output */ : /* no input */ : "memory");
+
+  /* Never reach here. */
+  /* Artificial entry to refer FT0, FT1, and FT2.  */
+  asm volatile (""
+		: : "r" (FT0), "r" (FT1), "r" (FT2));
+}
+
+typedef void (*handler)(void);
+extern uint8_t __ram_end__;
+
+handler vector[] __attribute__ ((section(".vectors"))) = {
+  (handler)&__ram_end__,
+  reset,
+  (handler)set_led,
+  flash_unlock,
+  (handler)flash_program_halfword,
+  (handler)flash_erase_page,
+  (handler)flash_check_blank,
+  (handler)flash_write,
+  (handler)flash_protect,
+  (handler)flash_erase_all_and_exec,
+  usb_lld_sys_init,
+  usb_lld_sys_shutdown,
+  nvic_system_reset,
+  clock_init,
+  gpio_init_primer2,
+  NULL,
+};
+
+const uint8_t sys_version[8] __attribute__((section(".sys.version"))) = {
+  3*2+2,	     /* bLength */
+  0x03,		     /* bDescriptorType = USB_STRING_DESCRIPTOR_TYPE*/
+  /* sys version: "2.0" */
+  '2', 0, '.', 0, '0', 0,
+};
--- a/example-primer2/sys.h
+++ b/example-primer2/sys.h
@@ -0,0 +1,115 @@
+extern const uint8_t sys_version[8];
+
+typedef void (*handler)(void);
+extern handler vector[16];
+
+static inline const uint8_t *
+unique_device_id (void)
+{
+  /* STM32F103 has 96-bit unique device identifier */
+  const uint8_t *addr = (const uint8_t *)0x1ffff7e8;
+
+  return addr;
+}
+
+static inline void
+set_led (int on)
+{
+  void (*func) (int) = (void (*)(int))vector[2];
+
+  return (*func) (on);
+}
+
+static inline void
+flash_unlock (void)
+{
+  (*vector[3]) ();
+}
+
+static inline int
+flash_program_halfword (uint32_t addr, uint16_t data)
+{
+  int (*func) (uint32_t, uint16_t) = (int (*)(uint32_t, uint16_t))vector[4];
+
+  return (*func) (addr, data);
+}
+
+static inline int
+flash_erase_page (uint32_t addr)
+{
+  int (*func) (uint32_t) = (int (*)(uint32_t))vector[5];
+
+  return (*func) (addr);
+}
+
+static inline int
+flash_check_blank (const uint8_t *p_start, size_t size)
+{
+  int (*func) (const uint8_t *, int) = (int (*)(const uint8_t *, int))vector[6];
+
+  return (*func) (p_start, size);
+}
+
+static inline int
+flash_write (uint32_t dst_addr, const uint8_t *src, size_t len)
+{
+  int (*func) (uint32_t, const uint8_t *, size_t)
+    = (int (*)(uint32_t, const uint8_t *, size_t))vector[7];
+
+  return (*func) (dst_addr, src, len);
+}
+
+static inline int
+flash_protect (void)
+{
+  int (*func) (void) = (int (*)(void))vector[8];
+
+  return (*func) ();
+}
+
+static inline void __attribute__((noreturn))
+flash_erase_all_and_exec (void (*entry)(void))
+{
+  void (*func) (void (*)(void)) = (void (*)(void (*)(void)))vector[9];
+
+  (*func) (entry);
+  for (;;);
+}
+
+static inline void
+usb_lld_sys_init (void)
+{
+  (*vector[10]) ();
+}
+
+static inline void
+usb_lld_sys_shutdown (void)
+{
+  (*vector[11]) ();
+}
+
+static inline void
+nvic_system_reset (void)
+{
+  (*vector[12]) ();
+}
+
+/*
+ * Users can override INLINE by 'attribute((used))' to have an
+ * implementation defined.
+ */
+#if !defined(INLINE)
+#define INLINE __inline__
+#endif
+
+static INLINE void
+clock_init (void)
+{
+  (*vector[13]) ();
+}
+
+static INLINE void
+gpio_init (void)
+{
+  (*vector[14]) ();
+}
--- a/rules.mk
+++ b/rules.mk
@@ -10,6 +10,10 @@ INCDIR += $(CHOPSTX)

 BUILDDIR = build
 OUTFILES = $(BUILDDIR)/$(PROJECT).elf $(BUILDDIR)/$(PROJECT).bin
+ifneq ($(ENABLE_OUTPUT_HEX),)
+OUTFILES += $(BUILDDIR)/$(PROJECT).hex
+endif
+

 OPT += -ffunction-sections -fdata-sections -fno-common

@@ -49,6 +53,9 @@ $(OBJS) : $(BUILDDIR)/%.o : %.c Makefile
 %.bin: %.elf $(LDSCRIPT)
 	$(OBJCOPY) -O binary $< $@

+%.hex: %.elf $(LDSCRIPT)
+	$(OBJCOPY) -O ihex $< $@
+
 clean:
 	-rm -f -r .dep $(BUILDDIR)
Author	SHA1	Message	Date
NIIBE Yutaka	a30a069ed8	Version 0.10	2015-09-15 10:39:36 +09:00
NIIBE Yutaka	8fed803085	bug fixes around cancel/join/exit	2015-09-15 10:26:40 +09:00
NIIBE Yutaka	4705e2fb15	fix cancellation	2015-09-11 17:04:28 +09:00
NIIBE Yutaka	14ad395523	Version 0.09	2015-09-10 20:22:32 +09:00
NIIBE Yutaka	acd4460a6e	Update API doc	2015-09-09 17:06:51 +09:00
NIIBE Yutaka	79b13fb4a9	Cancellation fixes	2015-09-09 17:04:59 +09:00
NIIBE Yutaka	e9521648d5	move exception handling routines	2015-09-09 11:55:17 +09:00
NIIBE Yutaka	2bd7a8e6db	move svc, preempt, and sched	2015-09-09 11:35:20 +09:00
NIIBE Yutaka	c57b13bedc	factor out chx_prio_init	2015-09-09 11:06:52 +09:00
NIIBE Yutaka	06e4459c21	factoring: systick	2015-09-09 09:47:25 +09:00
NIIBE Yutaka	baef99bf11	fix white spaces	2015-09-08 17:19:14 +09:00
NIIBE Yutaka	1b25cc5dcb	fix more spin lock	2015-09-08 17:14:43 +09:00
NIIBE Yutaka	ee3c5d4e6f	prepare kkojima's patch for Cortex-A7	2015-09-08 17:06:53 +09:00
NIIBE Yutaka	80408902d7	fix spin-locking of INTR_TOP	2015-09-08 14:46:11 +09:00
NIIBE Yutaka	f6d79e6821	Add Mateusz Zalega	2015-09-07 17:10:42 +09:00
NIIBE Yutaka	014dbf25f6	Add example-primer2	2015-09-07 17:06:05 +09:00
NIIBE Yutaka	41610443d4	Netrokey Start change	2015-09-07 15:52:38 +09:00
NIIBE Yutaka	46468760a3	Nitrokey start support	2015-09-04 17:09:56 +09:00
NIIBE Yutaka	85ef4a5391	Fix for Nitrokey-start	2015-09-04 16:43:45 +09:00
Mateusz Zalega	8650bde8a0	board: add Nitrokey Start Signed-off-by: Mateusz Zalega <mateusz@nitrokey.com>	2015-09-04 16:38:01 +09:00
NIIBE Yutaka	6e7334dcff	Fix the score about A and tone-table change	2015-08-08 13:50:20 +09:00
NIIBE Yutaka	04a948024a	Celebrate Happy Hacking Day.	2015-08-06 11:10:48 +09:00
NIIBE Yutaka	1bbbaabe0d	Add a speaker	2015-08-06 11:02:34 +09:00
NIIBE Yutaka	218102c5c4	Version 0.08	2015-07-31 17:58:20 +09:00
NIIBE Yutaka	2c9e6b69d2	update example-fsm-55	2015-07-31 17:56:35 +09:00
NIIBE Yutaka	1d38c24233	Add Nucleo	2015-07-30 20:35:21 +09:00
NIIBE Yutaka	a9de53c36b	board update, adding ST Dongle	2015-07-29 17:06:17 +09:00
NIIBE Yutaka	83486efd5f	update USB driver	2015-07-28 15:09:43 +09:00
NIIBE Yutaka	bdaae5661d	Version 0.07	2015-07-15 12:09:07 +09:00
NIIBE Yutaka	2de0e2c405	Update example CDC	2015-07-15 12:04:45 +09:00
NIIBE Yutaka	d19570954e	Update example for FSM-55	2015-07-15 12:03:49 +09:00
NIIBE Yutaka	44b4bf640f	Update example for LED blink	2015-07-15 12:01:53 +09:00
NIIBE Yutaka	9898639165	Update Cortex-M0 boards	2015-07-15 11:48:36 +09:00
NIIBE Yutaka	cd61ff5653	share sys with example-fsm-55	2015-07-15 09:51:24 +09:00
NIIBE Yutaka	27f42c8522	ADC settings are consolidated into the driver	2015-07-14 21:31:18 +09:00
NIIBE Yutaka	a48ffaef47	fix sys.c	2015-07-14 21:26:10 +09:00
NIIBE Yutaka	27f71ff5c0	New sys.c	2015-07-14 16:10:07 +09:00
NIIBE Yutaka	3ba8234cec	sys_board and stm32 primer2	2015-07-13 16:45:32 +09:00
NIIBE Yutaka	2bb0e0de5d	Version 0.06	2015-07-08 08:38:18 +09:00
NIIBE Yutaka	4dc10d6b18	Update for FSM-55	2015-07-07 12:31:15 +09:00
NIIBE Yutaka	43bd3bcefd	fix STBee Mini	2015-06-30 10:47:07 +09:00
NIIBE Yutaka	6d13bd3770	fix clk_gpio_init	2015-06-30 10:20:11 +09:00
NIIBE Yutaka	6665723154	Add support for CQ STARM.	2015-06-29 15:59:30 +09:00
NIIBE Yutaka	97b4471cee	Make it clear LED is mandatory.	2015-06-29 15:58:21 +09:00
NIIBE Yutaka	15ae2d8b32	cleanup entry.c	2015-06-29 13:48:30 +09:00
NIIBE Yutaka	48273b3cb6	Clean up clock/gpio code	2015-06-22 17:34:17 +09:00
NIIBE Yutaka	b298648079	Kaz Kojima add STM32 Primer2 support	2015-06-22 16:18:44 +09:00
NIIBE Yutaka	fc26cf0889	Version 0.05 Merge branch 'cortex-m0-support'	2015-04-20 14:17:40 +09:00
NIIBE Yutaka	18b38533f7	Merge branch 'master' of git.gniibe.org:chopstx/chopstx Conflicts: ChangeLog	2015-04-18 12:28:00 +09:00
NIIBE Yutaka	a0f33c1036	New: chopstx_main_init	2015-04-18 12:23:35 +09:00
NIIBE Yutaka	431e62a077	Add board-maple-mini.h	2015-04-08 09:16:25 +09:00
NIIBE Yutaka	2fb7fb6826	Version 0.04a	2015-03-17 12:50:56 +09:00
NIIBE Yutaka	7c022432d1	fix rebase	2014-12-10 18:53:00 +09:00
NIIBE Yutaka	b0992073d7	Add debian-logo.c (from Portland).	2014-12-10 18:50:11 +09:00
NIIBE Yutaka	5f4cca00fc	It should be BSS section not to output data to .hex.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	1fcfc846b8	Button pushed, then another demo.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	f4fb26a56a	add button thread and join on exit.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	98e25c1cb2	Add GNU as hidden command.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	aeb8bd5a95	l55 and hh only.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	447b11fd1c	Add Happy Hacking.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	f4f2afd0ad	Use SIZE55.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	dffcf2d4bf	fix col/row.	2014-12-10 18:50:10 +09:00
NIIBE Yutaka	b05e4030d2	Add example-fsm-55.	2014-12-10 18:50:09 +09:00
NIIBE Yutaka	f865e5149c	Add FSM-55.	2014-12-10 18:50:09 +09:00
NIIBE Yutaka	5137db8290	Cortex-M0 works.	2014-12-10 18:50:09 +09:00
NIIBE Yutaka	522380097e	Support Cortex-M0.	2014-12-10 18:49:02 +09:00
NIIBE Yutaka	23893d9b73	Version 0.04	2014-12-10 18:39:39 +09:00
NIIBE Yutaka	0276d0825e	.gitignore updated	2014-12-10 13:51:22 +09:00
NIIBE Yutaka	f344d926c1	STBee Mini support	2013-11-27 12:45:20 +09:00
NIIBE Yutaka	2327cd9013	add STBee support	2013-11-26 17:01:15 +09:00
NIIBE Yutaka	5968e2a053	Add hex generation	2013-11-26 13:21:26 +09:00
NIIBE Yutaka	a528292476	example usb stack update from Gnuk	2013-11-21 12:10:50 +09:00