CRCs

[@EE@]

Hi,
Got structure DataStruct:

DataStruct d1;
//fill d1; 
FilldDataStruct((unsigned char*)&d1);
CRC1=CrcOf((unsigned char*)d1);
void (DataStruct * d)
{
CRC2=CrcOf((unsigned char*)d);


}

why CRC1 != CRC2?; How to make CRC1 and CRC2 the same?. DataStruct is packed.

[2kaud]

What is this supposed to do:

void (DataStruct * d)
{
    CRC2=CrcOf((unsigned char*)d);
}

[@EE@]

meant to be a sudo code:

void VerifyAndCalcStat(DataStruct * d)
{
//DataStruct contains char strings and unsigned integers.
    CRC2=CrcOf((unsigned char*)d);
    
.
.
.
}

[VictorN]

meant to be a sudo code:

void VerifyAndCalcStat(DataStruct * d)
{
//DataStruct contains char strings and unsigned integers.
    CRC2=CrcOf((unsigned char*)d);
    
.
.
.
}

Where and how do you call this function?
How and where do you compare CRC1 and CRC2?

[@EE@]

traced the code,; somewhere before calling the VerifyAndCalcStat it was setting a field. Very tiny step. crc1 and crc2 seem to be the same and match. thanks for the hints.

unsigned int crc1, crc2;

void exceute()
{
     DataStruct d;
     fill_d(&d);
  
   
      //in here it was doing d.nm[60]=0;  //line x
      crc1 = crcOf(unsigned char*)d);  // moved these two before line x, now crc1 and crc2 match.
      VerifyAndCalcStat(&d);  

}
void VerifyAndCalcStat(DataStruct * d)
{
//DataStruct contains char strings and unsigned integers.
    CRC2=CrcOf((unsigned char*)d);
    in here c1c != crc2
.
.
.
}