STM32L0 use internal EEPROM

Hello,

i just want to use the Internal EEPROM of my STM32L052.

I followed the short description in the STM32CubeMX manual. But it is not working.

Here my small code example

 HAL_FLASHEx_DATAEEPROM_Unlock();
 HAL_FLASHEx_DATAEEPROM_Erase(0x08080000U);
 //HAL_FLASHEx_DATAEEPROM_EnableFixedTimeProgram();??
 HAL_FLASHEx_DATAEEPROM_Program (FLASH_TYPEPROGRAMDATA_WORD, 0x08080000U, 0x123456);
 HAL_FLASHEx_DATAEEPROM_Lock();
 HAL_Delay(100);
 xprintf("EEPROM 0:\n\r",(*(__IO uint32_t*) 0x08080000U));

Sadly it is not working. There is also no good example which helps me with that.

Any ideas?

Best regards

Max