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Clean up FS-BB48 example

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This commit is contained in:
NIIBE Yutaka
2016-04-22 17:21:29 +09:00
parent 1b12a78054
commit fba1dc05ea
6 changed files with 98 additions and 138 deletions
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4
example-fs-bb48/Makefile
View File

@@ -6,7 +6,7 @@ PROJECT = sample
CHOPSTX = ..
LDSCRIPT= sample.ld
CSRC = sample.c reset.c usb_kl27z.c usb-cdc.c crc32.c
CSRC = sample.c first-pages.c usb_kl27z.c usb-cdc.c
###################################
CROSS = arm-none-eabi-
@@ -16,7 +16,7 @@ OBJCOPY = $(CROSS)objcopy
MCU = cortex-m0plus
CWARN = -Wall -Wextra -Wstrict-prototypes
DEFS = -DMAKE_ENTRY_PUBLIC -DFREE_STANDING -DMHZ=48
DEFS = -DFREE_STANDING -DMHZ=48
OPT = -O3 -Os -g
LIBS =

74
example-fs-bb48/crc32.c → example-fs-bb48/first-pages.c
View File

@@ -1,11 +1,77 @@
/*
* CRC32.c - CRC32 calculation routines.
* first-pages.c - First pages for MKL27Z256.
*
* Copyright (C) 2016 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.
*
*
* First two pages of Flash ROM is difficult to use because of
* predefined purposes. It's defined as a default vector page and
* flash configuration page.
*
* We put something useful to those two pages, together with the
* data for predefined purposes.
*/
#include <stdint.h>
extern uint8_t __main_stack_end__;
static void __attribute__ ((naked,section(".flash_config_page")))
reset (void)
{
uint32_t r3 = 0xe000ed08;
asm volatile ("str %2, [%0]\n\t" /* Set SCR->VTOR */
"ldr %0, [%2, #4]\n\t" /* Jump to the entry */
"bx %0\n\t"
".align 2\n"
: "=r" (r3)
: "0" (r3), "r" (0x00000800)
: "memory");
/* Never reach here. */
}
static uint32_t
stack_entry[] __attribute__ ((section(".first_page.first_words"),used)) = {
(uint32_t)(&__main_stack_end__ - 32),
(uint32_t)reset,
};
/*
* NOTE: We don't use backdoor comparison key. The area is used by
* CRC32 table.
*/
static uint32_t
flash_config[] __attribute__ ((section(".flash_config"),used)) = {
0xffffffff, /* Protection bytes */
0xffff3ffe, /* FSEC=0xfe, FOPT=0x3f */
/* FOPT=0x3f:
* BOOTSRC_SEL=00: Boot from flash
*/
/* FSEC=0xfe:
* unsecure
*/
};
/*
* CRC32 calculation routines.
*/
/*
* Table of CRC32, generated by gen_crc_table.py
*/
static unsigned int crc32_table[256] = {
static unsigned int
crc32_table[256] __attribute__ ((section(".first_page"))) = {
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
@@ -53,24 +119,28 @@ static unsigned int crc32_table[256] = {
static unsigned int crc_reg;
__attribute__ ((section(".flash_config_page")))
void
crc32_init (void)
{
crc_reg = 0xffffffff;
}
__attribute__ ((section(".flash_config_page")))
unsigned int
crc32_value (void)
{
return crc_reg;
}
__attribute__ ((section(".flash_config_page")))
void
crc32_u8 (unsigned char bits_eight)
{
crc_reg = crc32_table[(crc_reg & 0xff) ^ bits_eight] ^ (crc_reg >> 8);
}
__attribute__ ((section(".flash_config_page")))
void
crc32_u32 (unsigned int u)
{

114
example-fs-bb48/reset.c
View File

@@ -1,114 +0,0 @@
/*
* sys.c - No system routines, but only RESET handler for MKL27Z256.
*
* Copyright (C) 2016 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 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)
{
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__ - 32),
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 */
none, /* SVCall */
none, /* Debug */
none, /* reserved */
preempt, /* PendSV */
chx_timer_expired, /* SysTick */
/* 0x40 */
chx_handle_intr, chx_handle_intr, chx_handle_intr, chx_handle_intr,
chx_handle_intr, chx_handle_intr, chx_handle_intr, chx_handle_intr,
/* 0x60 */
chx_handle_intr, chx_handle_intr, chx_handle_intr, chx_handle_intr,
chx_handle_intr, chx_handle_intr, chx_handle_intr, chx_handle_intr,
/* 0x80 */
chx_handle_intr, chx_handle_intr, chx_handle_intr, chx_handle_intr,
chx_handle_intr, chx_handle_intr, 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 */
};
uint32_t flash_config[] __attribute__ ((section(".flash_config"))) = {
0xffffffff, 0xffffffff, /* Backdoor comparison key. */
0xffffffff, /* Protection bytes */
0xffff3ffe, /* FSEC=0xfe, FOPT=0x3f */
/* FOPT=0x3f:
* BOOTSRC_SEL=00: Boot from flash
*/
/* FSEC=0xfe:
* unsecure
*/
};

38
example-fs-bb48/sample.ld
View File

@@ -1,11 +1,11 @@
/*
* MK27Z memory setup.
*/
__main_stack_size__ = 0x0100; /* Exception handlers */
__main_stack_size__ = 0x0100; /* Exception handlers */
__process0_stack_size__ = 0x0300; /* Main program */
__process1_stack_size__ = 0x0200; /* first thread program */
__process2_stack_size__ = 0x0100; /* second thread program */
__process3_stack_size__ = 0x0200; /* third thread program */
__process1_stack_size__ = 0x0200; /* first thread program */
__process2_stack_size__ = 0x0100; /* second thread program */
__process3_stack_size__ = 0x0200; /* third thread program */
MEMORY
{
@@ -23,15 +23,19 @@ SECTIONS
_text = .;
.f2 : ALIGN(16) SUBALIGN(8)
{
KEEP(*(.first_page.first_words))
KEEP(*(.first_page))
KEEP(*(.flash_config))
KEEP(*(.flash_config_page))
} > flash =0xffffffff
.text : ALIGN(16) SUBALIGN(16)
{
KEEP(*(.vectors))
. = ALIGN(1024);
KEEP(*(.flash_config))
KEEP(*(.startup.vectors))
. = ALIGN(16);
*(.text.svc)
*(.text.sched)
*(.text.preempt)
*(.text.startup.*)
*(.text)
*(.text.*)
@@ -41,11 +45,10 @@ SECTIONS
*(.glue_7)
*(.gcc*)
. = ALIGN(8);
} > flash
} > flash =0xffffffff
/DISCARD/ :
{
*(.startup.vectors)
*(.bss.startup.0)
}
@@ -55,7 +58,7 @@ SECTIONS
PROVIDE(__exidx_start = .);
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
PROVIDE(__exidx_end = .);
} > flash
} > flash =0xffffffff
.eh_frame_hdr : {*(.eh_frame_hdr)} > flash
@@ -98,11 +101,6 @@ SECTIONS
.data :
{
. = ALIGN(512);
__usb_bdt__ = .;
. += 512;
__usb_buf__ = .;
. += 8 /*control write*/ + 64 /*control read*/ + 64 + 64 + 8;
. = ALIGN(4);
PROVIDE(_data = .);
*(.data)
@@ -112,7 +110,7 @@ SECTIONS
*(.ramtext)
. = ALIGN(4);
PROVIDE(_edata = .);
} > ram AT > flash
} > ram AT > flash =0xffffffff
.bss :
{
@@ -123,7 +121,9 @@ SECTIONS
*(.bss.*)
. = ALIGN(4);
*(COMMON)
. = ALIGN(4);
. = ALIGN(512);
__usb_bdt__ = .;
. += 512;
PROVIDE(_bss_end = .);
} > ram

1
example-fs-bb48/usb_kl27z.c
View File

@@ -132,7 +132,6 @@ struct BD {
#define TOK_PID(ctrl) ((ctrl >> 2) & 0x0f)
extern uint8_t __usb_bdt__;
extern uint8_t __usb_buf__;
static struct BD *const BD_table = (struct BD *const)&__usb_bdt__;