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| author | xyzz <1065521+xyzz@users.noreply.github.com> | 2021-08-02 00:27:57 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-08-02 14:27:57 +1000 |
| commit | 720c676403660eacb880528f04a5c1d328b84650 (patch) | |
| tree | 6beb1e84a7d91ecf2e634209cfb3eb0aff41b010 /tmk_core | |
| parent | 4b630c46fed48f8a82641438029b628ec0dd5150 (diff) | |
flash_stm32: don't unlock flash if already unlocked (#13841)
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.
Diffstat (limited to 'tmk_core')
| -rw-r--r-- | tmk_core/common/chibios/flash_stm32.c | 8 |
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; + } } /** |