diff options
Diffstat (limited to 'tmk_core/common/chibios/eeprom_stm32.c')
| -rwxr-xr-x | tmk_core/common/chibios/eeprom_stm32.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/tmk_core/common/chibios/eeprom_stm32.c b/tmk_core/common/chibios/eeprom_stm32.c index 17d38af6a..4b1abc968 100755 --- a/tmk_core/common/chibios/eeprom_stm32.c +++ b/tmk_core/common/chibios/eeprom_stm32.c @@ -179,10 +179,14 @@ void eeprom_write_dword (uint32_t *Address, uint32_t Value) void eeprom_update_dword (uint32_t *Address, uint32_t Value) { uint16_t p = (const uint32_t) Address; - EEPROM_WriteDataByte(p, (uint8_t) Value); - EEPROM_WriteDataByte(p+1, (uint8_t) (Value >> 8)); - EEPROM_WriteDataByte(p+2, (uint8_t) (Value >> 16)); - EEPROM_WriteDataByte(p+3, (uint8_t) (Value >> 24)); + uint32_t existingValue = EEPROM_ReadDataByte(p) | (EEPROM_ReadDataByte(p+1) << 8) + | (EEPROM_ReadDataByte(p+2) << 16) | (EEPROM_ReadDataByte(p+3) << 24); + if(Value != existingValue){ + EEPROM_WriteDataByte(p, (uint8_t) Value); + EEPROM_WriteDataByte(p+1, (uint8_t) (Value >> 8)); + EEPROM_WriteDataByte(p+2, (uint8_t) (Value >> 16)); + EEPROM_WriteDataByte(p+3, (uint8_t) (Value >> 24)); + } } void eeprom_read_block(void *buf, const void *addr, uint32_t len) { |