unit1.cpp

关于在图象传输中加入CRC校验的DEMO

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
#include "crc.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
 unsigned char str[64]={'1','2','3','4','5','6','7','8'};
 unsigned long tabType=CRC32_DEFAULT ;  //CRC16_DEFAULT;     //CRC16_CCITT  //

void __fastcall TForm1::Button1Click(TObject *Sender)
{
 CCRC crc(tabType) ;

 unsigned char crcChr=(unsigned char)crc.RunCRC32(str,63,(unsigned short)tabType);
 str[63]=crcChr; //crc校验字追加到数据尾部
 return;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{

 CCRC crc(tabType) ;

 unsigned char crcChr=str[63];  //读取crc校验字
 unsigned char crcChr2=(unsigned char)crc.RunCRC32(str,63,(unsigned short)tabType);
 
 if(crcChr!=crcChr2)
    ShowMessage("传输失败!");           //CRC校验错误！印鉴有损。
 else
    ShowMessage("传输正常!");           //CRC校验正确，印鉴完好。


 return;
}
//---------------------------------------------------------------------------