/* writing buffer to flash */
for (uint32_t i = 0; i < ee_handle.size; i += 8)
{
  uint64_t double_word;
  memcpy((uint8_t*)&double_word, data, 8);
  if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD, ee_handle.address + i, doubleWord) != HAL_OK)
  {
    answer = false;
    break;
  }
  data += 8;
}