pcdread.c

RC500的C库函数

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

char PcdRead(uchar addr,uchar *readdata)
{
    char status;
    uchar i;
    idata struct TranSciveBuffer{uchar MfCommand;
                                 uchar MfLength;
                                 uchar MfData[16];
                                }MfComData;
    struct TranSciveBuffer *pi;

    pi=&MfComData;
    PcdSetTmo(4);
    WriteRC(RegChannelRedundancy,0x0F);
    MfComData.MfCommand=PCD_TRANSCEIVE;
    MfComData.MfLength=2;
    MfComData.MfData[0]=PICC_READ;
    MfComData.MfData[1]=addr;

    status=PcdComTransceive(pi);
    if(status==MI_OK)
    {
        if(MfComData.MfLength!=0x80)
        {
            status = MI_BITCOUNTERR;
        }
        else
        {
            for(i=0;i<16;i++)
            {
                *(readdata+i)=MfComData.MfData[i];
            }
        }
    }
    return status;
}