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stm32l4: Option byte loader must be started with flash unlocked! 

Warn user that device will loose connection.
This commit is contained in:
Uwe Bonnes 2018-04-15 18:59:41 +02:00
parent 83f9655f6e
commit 7034d0bb94
1 changed files with 2 additions and 1 deletions
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3
src/target/stm32l4.c
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@ -320,6 +320,7 @@ static const uint8_t i2offset[9] = {
static bool stm32l4_option_write(target *t, const uint32_t *values, int len)
{
tc_printf(t, "Device will loose connection. Rescan!\n");
stm32l4_flash_unlock(t);
target_mem_write32(t, FLASH_OPTKEYR, OPTKEY1);
target_mem_write32(t, FLASH_OPTKEYR, OPTKEY2);
@ -332,11 +333,11 @@ static bool stm32l4_option_write(target *t, const uint32_t *values, int len)
while (target_mem_read32(t, FLASH_SR) & FLASH_SR_BSY)
if(target_check_error(t))
return true;
target_mem_write32(t, FLASH_CR, FLASH_CR_LOCK);
target_mem_write32(t, FLASH_CR, FLASH_CR_OBL_LAUNCH);
while (target_mem_read32(t, FLASH_CR) & FLASH_CR_OBL_LAUNCH)
if(target_check_error(t))
return true;
target_mem_write32(t, FLASH_CR, FLASH_CR_LOCK);
return false;
}