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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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29
tool/asm-thumb/opt_bytes_write.S Normal file
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/* ARM Thumb Assembler code */
// arm-none-eabi-gcc -Wa,-amhls=opt_bytes_write.lst -c opt_bytes_write.S
#define FLASH_CR_OPTPG 0x0010
#define FLASH_SR_BSY 0x0001
#define FLASH_SR_OFFSET 0x0c
#define FLASH_CR_OFFSET 0x10
#define OB_RDP_UNLOCK 0x00a5
.cpu cortex-m3
.thumb
movw r0, #OB_RDP_UNLOCK
ldr r1, .TARGET_ADDR
ldr r2, .FLASH_BASE_ADDR
mov r3, #FLASH_CR_OPTPG
mov r4, #FLASH_SR_BSY
str r3, [r2, #FLASH_CR_OFFSET]
strh r0, [r1]
1: ldr r0, [r2, #FLASH_SR_OFFSET]
tst r0, r4
bne 1b
mov r0, #0
str r0, [r2, #FLASH_CR_OFFSET]
bkpt #0x00
.align 2
.FLASH_BASE_ADDR: .word 0x40022000
.TARGET_ADDR: .word 0x1FFFF800