struct sFlashParam  
{
    uint32_t aaa;
    uint16_t bbb;
    uint8_t  ccc;
    uint8_t  ddd;
};

struct sFlashParam flashParam;

void ParsePacket(void)
{
struct sFlashParam tempParam;
//load the old content
memcpy(&tempParam, (uint32_t*)FLASH_PARAM_ADDR, sizeof (struct sFlashParam));

if (new_packet[0] != tempParam.aaa)
{
    tempParam.aaa = new_packet[0];
    //do something    
}
if(new_packet[1] != tempParam.bbb)
{
    tempParam.bbb = new_packet[1];
    //do something    
}
//and so on…..

WriteToFlash(FLASH_PARAM_ADDR, (uint32_t*) &tempParam, sizeof (struct sFlashParam));
flashParam = tempParam;
}

struct sFlashParam  
{
    uint32_t aaa;
    uint16_t bbb;
    uint8_t  ccc;
    uint8_t  ddd;

    uint8_t  eee[4];
    uint8_t  fff[4];
    
};

WriteToFlash(FLASH_PARAM_ADDR, (uint32_t*) &tempParam, sizeof (struct sFlashParam));
flashParam = tempParam;

memcpy(&flashParam.eee, &tempParam.eee,4);
memcpy(&flashParam.fff, &tempParam.fff,4);