原创 calculate nxp lpc serial interrupt vector check sum

Rule[from datasheet of nxp lpc21xx]:

The reserved ARM interrupt vector location(0x0000 0014) should contain the 2's complement of the check-sum of the remaining interrupt vectors. This causes the checksum of all of the vectors together to be 0.

Polynomial:
V0 + V1 + V2 + V3 + V4 + Sum + V6 + V7 = 0

Code:
void CCalc_nxp_checksumDlg::OnCalc()
{
 // chose bin file
 CString sFilename;
 CFileDialog dlg(TRUE);      // open with TRUE, save with FALSE
 if(dlg.DoModal() == IDOK) {
  sFilename = dlg.GetPathName();   // full path
 } 

 // read 8 interrupt vectors
 CFile file;
 if(!file.Open(sFilename, CFile::modeRead)) { return; }
 int data[8];
 BYTE str[4];
 for(int i=0; i<8; i++) {
  file.Read(str, 4);
  data = *(int *)str;
 }
 file.Close();