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-rw-r--r--tmk_core/common/chibios/flash_stm32.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/tmk_core/common/chibios/flash_stm32.c b/tmk_core/common/chibios/flash_stm32.c
index e8b3dc4bc9..66f2b13768 100644
--- a/tmk_core/common/chibios/flash_stm32.c
+++ b/tmk_core/common/chibios/flash_stm32.c
@@ -161,9 +161,11 @@ 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;
+ }
}
/**