if(!(FLASH_IAPSR & 0x08))
        return 0;

// unlock memory
    FLASH_DUKR = EEPROM_KEY1;
    FLASH_DUKR = EEPROM_KEY2;
    // check bit DUL=1 in FLASH_IAPSR
    if(!(FLASH_IAPSR & 0x08))
             return 0;

for(i = 0; i < len; i++)
*addr = val[i];

FLASH_Status_TypeDef FLASH_WaitForLastOperation(FLASH_MemType_TypeDef FLASH_MemType) IN_RAM
{
uint32_t timeout = OPERATION_TIMEOUT;
uint8_t flagstatus = 0x00;
/* Wait until operation completion or write protected page occured */
if (FLASH_MemType == FLASH_MemType_Program)
{
while ((flagstatus == 0x00) && (timeout != 0x00))
{
flagstatus = (uint8_t)(FLASH->IAPSR & (uint8_t)(FLASH_IAPSR_EOP |
FLASH_IAPSR_WR_PG_DIS));
timeout--;
}
}
else
{
while ((flagstatus == 0x00) && (timeout != 0x00))
{
flagstatus = (uint8_t)(FLASH->IAPSR & (uint8_t)(FLASH_IAPSR_HVOFF |
FLASH_IAPSR_WR_PG_DIS));
timeout--;
}
}
if (timeout == 0x00 )
{
flagstatus = FLASH_Status_TimeOut;
}

return((FLASH_Status_TypeDef)flagstatus);
}

/**
  * @brief  Wait for a Flash operation to complete.
  * @note   The call and execution of this function must be done from RAM in case
  *         of Block operation.
  * @param  FLASH_MemType : Memory type
  *         This parameter can be a value of @ref FLASH_MemType_TypeDef
  * @retval FLASH status
  */
IN_RAM(FLASH_Status_TypeDef FLASH_WaitForLastOperation(FLASH_MemType_TypeDef FLASH_MemType))
{
  uint8_t flagstatus = 0x00;
  uint16_t timeout = OPERATION_TIMEOUT;
  
  /* Wait until operation completion or write protection page occurred */
#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
  defined(STM8S005) || defined(STM8AF52Ax) || defined(STM8AF62Ax) || defined(STM8AF626x)  
    if(FLASH_MemType == FLASH_MEMTYPE_PROG)
    {
      while((flagstatus == 0x00) && (timeout != 0x00))
      {
        flagstatus = (uint8_t)(FLASH->IAPSR & (uint8_t)(FLASH_IAPSR_EOP |
                                                        FLASH_IAPSR_WR_PG_DIS));
        timeout--;
      }
    }
    else
    {
      while((flagstatus == 0x00) && (timeout != 0x00))
      {
        flagstatus = (uint8_t)(FLASH->IAPSR & (uint8_t)(FLASH_IAPSR_HVOFF |
                                                        FLASH_IAPSR_WR_PG_DIS));
        timeout--;
      }
    }
#else /*STM8S103, STM8S903, STM8AF622x */
  while((flagstatus == 0x00) && (timeout != 0x00))
  {
    flagstatus = (uint8_t)(FLASH->IAPSR & (FLASH_IAPSR_EOP | FLASH_IAPSR_WR_PG_DIS));
    timeout--;
  }
#endif /* STM8S208, STM8S207, STM8S105, STM8AF52Ax, STM8AF62Ax, STM8AF262x */
  
  if(timeout == 0x00 )
  {
    flagstatus = FLASH_STATUS_TIMEOUT;
  }
  
  return((FLASH_Status_TypeDef)flagstatus);
}