Version 1.14.

ChangeLog

@@ -1,3 +1,39 @@
+2019-03-02  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* VERSION: 1.14.
+	* doc/chopstx.texi (VERSION): 1.14.
+
+2019-03-01  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* contrib/usart-stm32f103.c (usart_config): Fix SCEN setting
+	procedure.
+
+2019-03-01  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* contrib/usart-stm32f103.c (usart_config): Support parity error
+	interrupt setting.
+	(usart_init): Don't call usart_config here.
+	* example-usb-serial/sample.c: It's application calling
+	usart_config.
+
+2019-02-28  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* contrib/usart.h (BSCARD): New.
+	* contrib/usart-stm32f103.c (BSCARD): Baudrate for smartcard.
+	(usart_config_clken): New.
+	(usart_config): Fix for MODE_SMARTCARD.
+
+	* board/board-st-nucleo-f103.h: Define pins for smartcard
+	interface.
+
+2019-02-21  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* contrib/usart.h (MODE_SMARTCARD, MODE_IRDA, MODE_IRDA_LP)
+	(MASK_MODE): New.
+
+	* contrib/usart-stm32f103.c (usart_config): Add support for
+	those modes.
+
 2018-12-19  NIIBE Yutaka  <gniibe@fsij.org>
 
 	* VERSION: 1.13.

NEWS

@@ -1,6 +1,14 @@
 NEWS - Noteworthy changes
 
 
+* Major changes in Chopstx 1.14
+
+  Released 2019-03-02
+
+** Enhancement of driver: USART for STM32
+Now, it supports smartcard communication.
+
+
 * Major changes in Chopstx 1.13
 
   Released 2018-12-19

README

@@ -1,6 +1,6 @@
 Chopstx - Threads and only Threads
-							Version 1.12
+							Version 1.14
-							  2018-11-12
+							  2018-03-02
 							Niibe Yutaka
 					     Flying Stone Technology
 

VERSION

@@ -1 +1 @@
-release/1.12
+release/1.14

board/board-st-nucleo-f103.h

@@ -49,17 +49,26 @@
  * Port B setup.
  * PB0  - input with pull-up: AN8 for NeuG
  * PB1  - input with pull-up: AN9 for NeuG
- * PB10 - Alternate function push pull output 2MHz USART3-TX
+ * ---
- * PB11 - Input with pull-up                       USART3-RX
+ * ---
- * PB12 - Alternate function push pull output 2MHz USART3-CK
+ * PB4  - Input with pull-up: Card insertion detect: 0 when detected
- * PB13 - Input with pull-up                       USART3-CTS
+ * ---
- * PB14 - Alternate function push pull output 2MHz USART3-RTS
+ * PB6  - Output push pull 2MHz: Vcc for card: default 0
+ * ---
+ * PB8  - Output push pull 2MHz: Vpp for card: default 0
+ * PB9  - Output push pull 2MHz: RST for card: default 0
+ * PB10 - Alternate function open-drain output 50MHz USART3-TX
+ * PB11 - Input with pull-up                         USART3-RX
+ * PB12 - Alternate function push pull output  50MHz USART3-CK
+ * PB13 - Input with pull-up                         USART3-CTS
+ * PB14 - Alternate function push pull output  50MHz USART3-RTS
+ * ---
  * ------------------------ Default
  * PBx  - input with pull-up.
  */
-#define VAL_GPIO_OTHER_ODR          0xFFFFFFFF
+#define VAL_GPIO_OTHER_ODR          0xFFFFFCBF
-#define VAL_GPIO_OTHER_CRL          0x88888888      /*  PB7...PB0 */
+#define VAL_GPIO_OTHER_CRL          0x82888888      /*  PB7...PB0 */
-#define VAL_GPIO_OTHER_CRH          0x8A8A8A88      /* PB15...PB8 */
+#define VAL_GPIO_OTHER_CRH          0x8B8B8F22      /* PB15...PB8 */
 
 #define RCC_ENR_IOP_EN      (RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN)
 #define RCC_RSTR_IOP_RST    (RCC_APB2RSTR_IOPARST | RCC_APB2RSTR_IOPBRST)

chopstx.c

@@ -1,7 +1,7 @@
 /*
  * chopstx.c - Threads and only threads.
  *
- * Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018
+ * Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018, 2019
  *               Flying Stone Technology
  * Author: NIIBE Yutaka <gniibe@fsij.org>
  *
@@ -567,19 +567,21 @@ chx_exit (void *retval)
 
 /*
  * Lower layer mutex unlocking.  Called with schedule lock held.
+ * Return PRIO of the thread which is waken up.
  */
 static chopstx_prio_t
 chx_mutex_unlock (chopstx_mutex_t *mutex)
 {
   struct chx_thread *tp;
-  chopstx_prio_t prio = 0;
 
   mutex->owner = NULL;
   running->mutex_list = mutex->list;
   mutex->list = NULL;
 
   tp = (struct chx_thread *)ll_pop (&mutex->q);
-  if (tp)
+  if (!tp)
+    return 0;
+  else
     {
       uint16_t newprio = running->prio_orig;
       chopstx_mutex_t *m;
@@ -595,11 +597,8 @@ chx_mutex_unlock (chopstx_mutex_t *mutex)
       /* Then, assign it.  */
       running->prio = newprio;
 
-      if (prio < tp->prio)
+      return tp->prio;
-	prio = tp->prio;
     }
-
-  return prio;
 }
 
 #define CHOPSTX_PRIO_MASK ((1 << CHOPSTX_PRIO_BITS) - 1)

contrib/usart-stm32f103.c

@@ -1,7 +1,7 @@
 /*
  * usart-stm32.c - USART driver for STM32F103 (USART2 and USART3)
  *
- * Copyright (C) 2017  g10 Code GmbH
+ * Copyright (C) 2017, 2019  g10 Code GmbH
  * Author: NIIBE Yutaka <gniibe@fsij.org>
  *
  * This file is a part of Chopstx, a thread library for embedded.
@@ -104,6 +104,7 @@ static const struct brr_setting brr_table[] = {
   { B230400, (   9 << 4)|12},
   { B460800, (   4 << 4)|14},
   { B921600, (   2 << 4)|7},
+  { BSCARD,  ( 232 << 4)|8},
 };
 
 static void *usart_main (void *arg);
@@ -111,6 +112,18 @@ static void *usart_main (void *arg);
 static struct usart_stat usart2_stat;
 static struct usart_stat usart3_stat;
 
+void
+usart_config_clken (uint8_t dev_no, int on)
+{
+  struct USART *USARTx = get_usart_dev (dev_no);
+
+  if (on)
+    USARTx->CR2 |= (1 << 11);
+  else
+    USARTx->CR2 &= ~(1 << 11);
+}
+
+
 int
 usart_config (uint8_t dev_no, uint32_t config_bits)
 {
@@ -136,9 +149,9 @@ usart_config (uint8_t dev_no, uint32_t config_bits)
     return -1;
 
   if ((config_bits & PARENB) == 0)
-    cr1_config &= ~USART_CR1_PCE;
+    cr1_config &= ~(USART_CR1_PCE | USART_CR1_PEIE);
   else
-    cr1_config |=  USART_CR1_PCE;
+    cr1_config |=  (USART_CR1_PCE | USART_CR1_PEIE);
 
   if ((config_bits & PARODD) == 0)
     cr1_config &= ~USART_CR1_PS;
@@ -169,6 +182,21 @@ usart_config (uint8_t dev_no, uint32_t config_bits)
     USARTx->CR3 = 0;
 
   USARTx->CR1 = cr1_config;
+
+  /* SCEN (smartcard enable) should be set _after_ CR1.  */
+  if ((config_bits & MASK_MODE))
+    {
+      if ((config_bits & MASK_MODE) == MODE_SMARTCARD)
+	{
+	  USARTx->GTPR = (16 << 8) | 5;
+	  USARTx->CR3 |= ((1 << 5) | (1 << 4));
+	}
+      else if ((config_bits & MASK_MODE) == MODE_IRDA)
+	USARTx->CR3 |= (1 << 1);
+      else if ((config_bits & MASK_MODE) == MODE_IRDA_LP)
+	USARTx->CR3 |= (1 << 2) | (1 << 1);
+    }
+
   return 0;
 }
 
@@ -187,8 +215,6 @@ usart_init (uint16_t prio, uintptr_t stack_addr, size_t stack_size,
   RCC->APB1RSTR = ((1 << 18) | (1 << 17));
   RCC->APB1RSTR = 0;
 
-  usart_config (2, B115200 | CS8 | STOP1B);
-  usart_config (3, B115200 | CS8 | STOP1B);
   chopstx_create (prio, stack_addr, stack_size, usart_main, NULL);
 }
 

contrib/usart.h

@@ -11,6 +11,7 @@
 #define B230400     26
 #define B460800     27
 #define B921600     28
+#define BSCARD      63
 #define MASK_BAUD 0x3f
 
 /* POSIX supports 5, 6.  USB suppots 16 */
@@ -43,6 +44,13 @@ PAR_BITS  3
 /* USB: SERIAL_STATE
    DSR DCD RI */
 
+/* non-POSIX, non-USB-CDC configs */
+#define MODE_SMARTCARD (1 << 30)
+#define MODE_IRDA      (2UL << 30)
+#define MODE_IRDA_LP   (3UL << 30)
+#define MASK_MODE      (0x3UL << 30)
+/* 0: standard, 1: smartcard, 2: IrDA, 3: IrDA-LP */
+
 struct usart_stat {
   uint8_t dev_no;
 
@@ -64,3 +72,4 @@ int usart_read (uint8_t dev_no, char *buf, uint16_t buflen);
 int usart_write (uint8_t dev_no, char *buf, uint16_t buflen);
 const struct usart_stat *usart_stat (uint8_t dev_no);
 int usart_send_break (uint8_t dev_no);
+void usart_config_clken (uint8_t dev_no, int on);

doc/chopstx.texi

@@ -1,7 +1,7 @@
 \input texinfo                      @c -*-texinfo-*-
 @c %**start of header
 @setfilename chopstx.info
-@set VERSION 1.13
+@set VERSION 1.14
 @settitle Chopstx Reference Manual
 @c Unify some of the indices.
 @syncodeindex tp fn

eventflag.c

@@ -74,6 +74,9 @@ eventflag_prepare_poll (struct eventflag *ev, chopstx_poll_cond_t *poll_desc)
 }
 
 
+/* When multiple events are marked, event with lower bit has precedence.
+   Because __builtin_ffs returns the least significant 1-bit.  */
+
 eventmask_t
 eventflag_get (struct eventflag *ev)
 {

example-usb-serial/README

@@ -1,12 +1,19 @@
 This is an application example using ST Nucleo F103 board.
 
-SB62 and SB63 should be soldered.
+SB62 and SB63 should be soldered to connect PA2 and PA3 to CN10
-ST-Link/V2 is disconnected (SB13 and SB14).
+connector.
+
+ST-Link/V2's TX and RX are disconnected (by removing SB13 and SB14).
+
+Smartcard can be connected, by using USART3_TX for I/O and USART3_CK
+for CLK, PB6 for Vcc, PB8 for Vpp, and PB9 for RST.
+
 
 NOTE:
 
 Using the USB CDC-ACM for serial communication is a kind of wrong,
-because it's designed for modem;  No way to control CTSRTS. 
+because it's designed for modem; In the protocol, we have no way to
+control the CTSRTS signal.
 
 TIOCGICOUNT
 
@@ -19,4 +26,4 @@ TODO:
 * stats report control
   By vendor specific control?
 * Half-duplex support
-* Support of other communication mode: smartcard, IrDA, etc.
+* Support of other communication mode: IrDA, etc.

example-usb-serial/sample.c

@@ -238,6 +238,9 @@ main (int argc, const char *argv[])
 
   usart_init (PRIO_USART, STACK_ADDR_USART, STACK_SIZE_USART, ss_notify);
 
+  usart_config (2, B115200 | CS8 | STOP1B);
+  usart_config (3, B115200 | CS8 | STOP1B);
+
   cdc_usart0.cdc = cdc_open (0);
   cdc_usart0.dev_no = 2;
   cdc_usart1.cdc = cdc_open (1);

mcu/sys-mkl27z.c

@@ -23,14 +23,14 @@
 #include "board.h"
 
 #define ADDR_VECTORS (0x00000900)
-#define ADDR_SCR_VTOR 0xe000ed08
+#define ADDR_SCB_VTOR 0xe000ed08
 
 static void __attribute__ ((naked,section(".fixed_function.reset")))
 reset (void)
 {
-  uint32_t r3 = ADDR_SCR_VTOR;
+  uint32_t r3 = ADDR_SCB_VTOR;
 
-  asm volatile ("str	%2, [%0]\n\t"	  /* Set SCR->VTOR     */
+  asm volatile ("str	%2, [%0]\n\t"	  /* Set SCB->VTOR     */
 		"ldr	%0, [%2]\n\t"     /* Stack address     */
 		"msr	MSP, %0\n\t"	  /* Exception handler stack. */
 		"ldr	%0, [%2, #4]\n\t" /* The entry address */

mcu/sys-stm32f0.c

@@ -340,13 +340,13 @@ reset (void)
 #else
   extern const uint32_t FT0[256], FT1[256], FT2[256];
   asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
-		"ldr	r0, 1f\n\t"     /* r0 = SCR */
+		"ldr	r0, 1f\n\t"     /* r0 = SCB start */
 		"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 */
+		"str	r1, [r0, #8]\n\t"	/* Set SCB->VTOR */
 		"ldr	r0, [r1], #4\n\t"
 		"msr	MSP, r0\n\t"	/* Main (exception handler) stack. */
 		"ldr	r0, [r1]\n\t"	/* Reset handler.                  */

mcu/sys-stm32f103.c

@@ -321,13 +321,13 @@ reset (void)
    * So, we take the address from PC.
    */
   asm volatile ("cpsid	i\n\t"		/* Mask all interrupts. */
-		"ldr	r0, 1f\n\t"     /* r0 = SCR */
+		"ldr	r0, 1f\n\t"     /* r0 = SCB start */
 		"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 */
+		"str	r1, [r0, #8]\n\t"	/* Set SCB->VTOR */
 		"ldr	r0, [r1], #4\n\t"
 		"msr	MSP, r0\n\t"	/* Main (exception handler) stack. */
 		"ldr	r0, [r1]\n\t"	/* Reset handler.                  */