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ST-Link/V2 flash ROM writer

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NIIBE Yutaka
2012-06-20 14:44:20 +09:00
parent b3c15ce93c
commit 4290a2cc10
6 changed files with 553 additions and 1 deletions
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39
tool/asm-thumb/flash_write.S Normal file
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/* ARM Thumb Assembler code */
// arm-none-eabi-gcc -Wa,-amhls=flash_write.lst -c flash_write.S
#define FLASH_CR_PG 0x0001 // == FLASH_SR_BSY
#define FLASH_CR_ERRORS 0x0014 // == PGERR | WRPRTERR
#define FLASH_SR_BSY 0x0001
#define FLASH_SR_OFFSET 0x0c
#define FLASH_CR_OFFSET 0x10
#define COUNT 0x1000
.cpu cortex-m3
.thumb
movw r2, #COUNT
ldr r0, .SRC_ADDR
ldr r1, .TARGET_ADDR
ldr r4, .FLASH_BASE_ADDR
mov r5, #FLASH_CR_PG
mov r6, #FLASH_CR_ERRORS
mov r7, #0
str r5, [r4, #FLASH_CR_OFFSET]
0: ldrh r3, [r0, r7]
strh r3, [r1, r7]
1: ldr r3, [r4, #FLASH_SR_OFFSET]
tst r3, r5
bne 1b
tst r3, r6
bne 2f
add r7, r7, #0x02
cmp r7, r2
bne 0b
2: mov r7, #0
str r7, [r4, #FLASH_CR_OFFSET]
bkpt #0x00
.align 2
.FLASH_BASE_ADDR: .word 0x40022000
.SRC_ADDR: .word 0x20000038
.TARGET_ADDR: .word 0x08000000