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cpu/stm32_common/periph: don't lock if flash is already locked

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This commit is contained in:
Alexandre Abadie 2018-05-27 15:11:59 +02:00
parent cb089a2f74
commit c73ec5c00f
1 changed files with 5 additions and 3 deletions
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8
cpu/stm32_common/periph/flash_common.c
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@ -38,8 +38,8 @@
void _unlock(void)
{
DEBUG("[flash-common] unlocking the flash module\n");
if (CNTRL_REG & CNTRL_REG_LOCK) {
DEBUG("[flash-common] unlocking the flash module\n");
KEY_REG = FLASH_KEY1;
KEY_REG = FLASH_KEY2;
}
@ -47,6 +47,8 @@ void _unlock(void)
void _lock(void)
{
DEBUG("[flash-common] locking the flash module\n");
CNTRL_REG |= CNTRL_REG_LOCK;
if (!(CNTRL_REG & CNTRL_REG_LOCK)) {
DEBUG("[flash-common] locking the flash module\n");
CNTRL_REG |= CNTRL_REG_LOCK;
}
}