pcdauthstate.c

来自「RC 500的函数库」· C语言 代码 · 共 50 行

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

char PcdAuthState(uchar auth_mode,uchar block,uchar *snr)
{
    char status=MI_OK;
    uchar i;
    idata struct TranSciveBuffer{uchar MfCommand;
                                 uchar MfLength;
                                 uchar MfData[6];
                                }MfComData;
    struct TranSciveBuffer *pi;
    pi=&MfComData;

    WriteRC(RegChannelRedundancy,0x07);
    if(status==MI_OK)
    {
        PcdSetTmo(106);
        MfComData.MfCommand=PCD_AUTHENT1;
        MfComData.MfLength=6;
        MfComData.MfData[0]=auth_mode;
        MfComData.MfData[1]=block;
        for(i=0;i<4;i++)
        {
	      MfComData.MfData[i+2]=*(snr+i);
        }
        if((status=PcdComTransceive(pi))==MI_OK)
        {
            if (ReadRC(RegSecondaryStatus)&0x07) 
            {
                status = MI_BITCOUNTERR;
            }
            else
            {
                MfComData.MfCommand=PCD_AUTHENT2;
                MfComData.MfLength=0;
                if((status=PcdComTransceive(pi))==MI_OK)
                {
                    if(ReadRC(RegControl)&0x08)
                        status=MI_OK;
                    else
                        status=MI_AUTHERR;
                }
             }
         }
   }
   return status;
}