diff options
| -rw-r--r-- | src/stm/ao_eeprom_stm.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/src/stm/ao_eeprom_stm.c b/src/stm/ao_eeprom_stm.c index 5a75a97d..58783f1a 100644 --- a/src/stm/ao_eeprom_stm.c +++ b/src/stm/ao_eeprom_stm.c @@ -55,10 +55,16 @@ ao_storage_erase(ao_pos_t pos) __reentrant static void ao_intflash_unlock(void) { + /* Disable backup write protection */ + stm_pwr.cr |= (1 << STM_PWR_CR_DBP); + /* Unlock Data EEPROM and FLASH_PECR register */ stm_flash.pekeyr = STM_FLASH_PEKEYR_PEKEY1; stm_flash.pekeyr = STM_FLASH_PEKEYR_PEKEY2; + if (stm_flash.pecr & (1 << STM_FLASH_PECR_PELOCK)) + printf ("eeprom unlock failed\n"); + /* Configure the FTDW bit (FLASH_PECR[8]) to execute * word write, whatever the previous value of the word * being written to @@ -68,8 +74,8 @@ ao_intflash_unlock(void) (0 << STM_FLASH_PECR_EOPIE) | (0 << STM_FLASH_PECR_FPRG) | (0 << STM_FLASH_PECR_ERASE) | - (0 << STM_FLASH_PECR_FTDW) | - (1 << STM_FLASH_PECR_DATA) | + (1 << STM_FLASH_PECR_FTDW) | + (0 << STM_FLASH_PECR_DATA) | (0 << STM_FLASH_PECR_PROG) | (0 << STM_FLASH_PECR_OPTLOCK) | (0 << STM_FLASH_PECR_PRGLOCK) | @@ -97,15 +103,9 @@ ao_intflash_write32(uint16_t pos, uint32_t w) addr = (uint32_t *) (stm_eeprom + pos); - /* Erase previous word */ - *addr = 0; + /* Write a word to a valid address in the data EEPROM */ + *addr = w; ao_intflash_wait(); - - if (w) { - /* Write a word to a valid address in the data EEPROM */ - *addr = w; - ao_intflash_wait(); - } } static void |