51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
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bool flash_is_locked(void) {
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return (FLASH->CR & FLASH_CR_LOCK);
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}
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void flash_unlock(void) {
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FLASH->KEYR = 0x45670123;
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FLASH->KEYR = 0xCDEF89AB;
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}
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void flash_lock(void) {
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FLASH->CR |= FLASH_CR_LOCK;
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}
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bool flash_erase_sector(uint16_t sector) {
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#ifdef BOOTSTUB
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// don't erase the bootloader(sector 0)
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uint16_t min_sector = 1U;
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uint16_t max_sector = 11U;
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#else
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uint16_t min_sector = LOGGING_FLASH_SECTOR_A;
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uint16_t max_sector = LOGGING_FLASH_SECTOR_B;
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#endif
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bool ret = false;
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if ((sector >= min_sector) && (sector <= max_sector) && (!flash_is_locked())) {
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FLASH->CR = (sector << 3) | FLASH_CR_SER;
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FLASH->CR |= FLASH_CR_STRT;
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while ((FLASH->SR & FLASH_SR_BSY) != 0U);
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ret = true;
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}
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return ret;
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}
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void flash_write_word(uint32_t *prog_ptr, uint32_t data) {
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#ifndef BOOTSTUB
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// don't write to any region besides the logging region
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if ((prog_ptr >= (uint32_t *)LOGGING_FLASH_BASE_A) && (prog_ptr < (uint32_t *)(LOGGING_FLASH_BASE_B + LOGGING_FLASH_SECTOR_SIZE))) {
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#endif
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uint32_t *pp = prog_ptr;
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FLASH->CR = FLASH_CR_PSIZE_1 | FLASH_CR_PG;
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*pp = data;
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while ((FLASH->SR & FLASH_SR_BSY) != 0U);
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#ifndef BOOTSTUB
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}
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#endif
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}
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void flush_write_buffer(void) { }
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