34 lines
770 B
C
34 lines
770 B
C
bool flash_is_locked(void) {
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return (FLASH->CR1 & FLASH_CR_LOCK);
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}
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void flash_unlock(void) {
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FLASH->KEYR1 = 0x45670123;
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FLASH->KEYR1 = 0xCDEF89AB;
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}
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bool flash_erase_sector(uint8_t sector, bool unlocked) {
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// don't erase the bootloader(sector 0)
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if (sector != 0 && sector < 8 && unlocked) {
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FLASH->CR1 = (sector << 8) | FLASH_CR_SER;
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FLASH->CR1 |= FLASH_CR_START;
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while (FLASH->SR1 & FLASH_SR_QW);
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return true;
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}
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return false;
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}
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void flash_write_word(void *prog_ptr, uint32_t data) {
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uint32_t *pp = prog_ptr;
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FLASH->CR1 |= FLASH_CR_PG;
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*pp = data;
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while (FLASH->SR1 & FLASH_SR_QW);
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}
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void flush_write_buffer(void) {
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if (FLASH->SR1 & FLASH_SR_WBNE) {
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FLASH->CR1 |= FLASH_CR_FW;
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while (FLASH->SR1 & FLASH_CR_FW);
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}
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}
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