noble/qmk-vial
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

flash_stm32: don't unlock flash if already unlocked

Browse source 
On stm32f4 after reboot from DFU it was observed that the flash is
already unlocked. In that case, attempting to unlock it again causes a
data abort.
This commit is contained in:
Ilya Zhuravlev 2021-08-01 16:25:27 -04:00
parent 99bd9aeb3f
commit 7d932b88f8
1 changed files with 5 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
tmk_core/common/chibios/flash_stm32.c
View file

@ -175,9 +175,11 @@ FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data) {
* @retval None
*/
void FLASH_Unlock(void) {
/* Authorize the FPEC Access */
FLASH->KEYR = FLASH_KEY1;
FLASH->KEYR = FLASH_KEY2;
if (FLASH->CR & FLASH_CR_LOCK) {
/* Authorize the FPEC Access */
FLASH->KEYR = FLASH_KEY1;
FLASH->KEYR = FLASH_KEY2;
}
}
/**