pcdrequest.c

RC500的C库函数

#include <reg52.h>
#include "rc500.h"

char PcdRequest(uchar req_code)
{
   char status;
   idata struct TranSciveBuffer {uchar MfCommand;
                                 uchar MfLength;
                                 uchar MfData[1];
                                }MfComData;
   struct TranSciveBuffer *pi;

   pi=&MfComData;
   PcdSetTmo(106);
   WriteRC(RegChannelRedundancy,0x03);
   ClearBitMask(RegControl,0x08);
   WriteRC(RegBitFraming,0x07);
   MfComData.MfCommand=PCD_TRANSCEIVE;
   MfComData.MfLength=1;
   MfComData.MfData[0]=req_code;
   status=PcdComTransceive(pi);
   if(!status)
   {    if(MfComData.MfLength!=0x10)
        {
         status=MI_BITCOUNTERR;
        }
   }
   return status;
}