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fix bug in Update RAM code #27

Merged
mhu merged 1 commits from issue/24-update-could-fail into dev 2021-05-16 20:41:56 +02:00
Conversation 0 Commits 1 Files Changed 1 +30 -4
1 changed files with 30 additions and 4 deletions
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34
stm-firmware/updater/ram-code/flash-writer.c
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@ -54,17 +54,43 @@ int flash_writer_write_to_memory(void *dest, const void *src, uint32_t size)
uint32_t *word_dest_ptr;
const char *char_src_ptr;
char *char_dest_ptr;
uint32_t pre_byte_count;
flash_writer_enable_access();
while (flash_op_busy());
/* Do the full words */
/* Number of full words to program */
full_word_cnt = size / 4u;
byte_cnt = size % 4;
word_dest_ptr = dest;
word_src_ptr = src;
/* Do the first bytes, in case the destination is not word aligned */
pre_byte_count = (4 - ((uint32_t)dest % 4u)) % 4;
if (pre_byte_count) {
FLASH->CR = 0u;
FLASH->CR |= FLASH_CR_PG;
char_src_ptr = src;
char_dest_ptr = dest;
/* Write bytes to memory until we hit the next word aligned address */
for (idx = 0; idx < pre_byte_count; idx++) {
*(char_dest_ptr++) = *(char_src_ptr++);
}
/* Correct the word addresses set above */
full_word_cnt = (size - pre_byte_count) / 4u;
byte_cnt = (size - pre_byte_count) % 4;
word_dest_ptr = (uint32_t *)char_dest_ptr;
word_src_ptr = (uint32_t *)char_src_ptr;
while(flash_op_busy());
FLASH->CR = 0u;
}
/* Do the full word flash write */
if (full_word_cnt) {
FLASH->CR = FLASH_CR_PSIZE_1;
FLASH->CR |= FLASH_CR_PG;
@ -76,7 +102,7 @@ int flash_writer_write_to_memory(void *dest, const void *src, uint32_t size)
}
while (flash_op_busy());
FLASH->CR = 0;
FLASH->CR = 0u;
}
/* write remaining bytes */
@ -84,7 +110,7 @@ int flash_writer_write_to_memory(void *dest, const void *src, uint32_t size)
char_src_ptr = (char *)word_src_ptr;
char_dest_ptr = (char *)word_dest_ptr;
FLASH->CR = 0;
FLASH->CR = 0u;
FLASH->CR |= FLASH_CR_PG;
for (idx = 0; idx < byte_cnt; idx++) {
@ -94,7 +120,7 @@ int flash_writer_write_to_memory(void *dest, const void *src, uint32_t size)
}
while (flash_op_busy());
FLASH->CR = 0;
FLASH->CR = 0u;
}
lock_flash_cr();