CRC16自动生成校验码子函数 复制可用

void CRC (unsigned char *m, unsigned short len)
{
  
  unsigned char gk,gj,gi,f_temp,f_hz;
  gk=0;
  gj=0;
  
  *(m+len)=0;
  *(m+len+1)=0;
  len++;
  while(len!=0)
   {
     gk^=*m;
     *(m++);
     for(gi=0;gi<8;gi++)
     {


      if ( (gk & 0x80) == 0) f_temp=0; else f_temp=1;
      gk<<=1;

      if ( (gj & 0x80) == 0) f_hz=0; else f_hz=1;
      gj<<=1;

      if(f_temp==1)
        gj|=1;
      if(f_hz==1)
       {
         gk^=0x05;
         gj^=0x80;