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PcdComTransceive.c
资源名称：RC500.rar　[点击查看]
上传用户：hbtfgg
上传日期：2021-12-10
资源大小：16k
文件大小：3k
源码类别：

RFID编程

开发平台：

C/C++

PcdComTransceive.c：源码内容
  1. #include<reg52.h>
  2. #include<rc500.h>
  4. idata struct TranSciveBuffer{uchar MfCommand;
  5.                              uchar MfLength;
  6.                              uchar MfData[19];
  7.                             };
  9. char PcdComTransceive(struct TranSciveBuffer *pi)
  10. {
  11.    bit recebyte=0;
  12.    char status;
  13.    uchar irqEn=0x00;
  14.    uchar waitFor=0x00;
  15.    uchar lastBits;
  16.    uchar n;
  17.    uint i;
  18.    switch(pi->MfCommand)
  19.    {
  20.       case PCD_IDLE:
  21.          irqEn = 0x00;
  22.          waitFor = 0x00;
  23.          break;
  24.       case PCD_WRITEE2:
  25.          irqEn = 0x11;
  26.          waitFor = 0x10;
  27.          break;
  28.       case PCD_READE2:
  29.          irqEn = 0x07;
  30.          waitFor = 0x04;
  31.          recebyte=1;
  32.          break;
  33.       case PCD_LOADCONFIG:
  34.       case PCD_LOADKEYE2:
  35.       case PCD_AUTHENT1:
  36.          irqEn = 0x05;
  37.          waitFor = 0x04;
  38.          break;
  39.       case PCD_CALCCRC:
  40.          irqEn = 0x11;
  41.          waitFor = 0x10;
  42.          break;
  43.       case PCD_AUTHENT2:
  44.          irqEn = 0x04;
  45.          waitFor = 0x04;
  46.          break;
  47.       case PCD_RECEIVE:
  48.          irqEn = 0x06;
  49.          waitFor = 0x04;
  50.          recebyte=1;
  51.          break;
  52.       case PCD_LOADKEY:
  53.          irqEn = 0x05;
  54.          waitFor = 0x04;
  55.          break;
  56.       case PCD_TRANSMIT:
  57.          irqEn = 0x05;
  58.          waitFor = 0x04;
  59.          break;
  60.       case PCD_TRANSCEIVE:
  61.          irqEn = 0x3D;
  62.          waitFor = 0x04;
  63.          recebyte=1;
  64.          break;
  65.       default:
  66.          pi->MfCommand=MI_UNKNOWN_COMMAND;
  67.          break;
  68.    }
  69.    if(pi->MfCommand!=MI_UNKNOWN_COMMAND)
  70.    {
  71.       WriteRC(RegPage,0x00);
  72.       WriteRC(RegInterruptEn,0x7F);
  73.       WriteRC(RegInterruptRq,0x7F);
  74.       WriteRC(RegCommand,PCD_IDLE);
  75.       SetBitMask(RegControl,0x01);
  76.       WriteRC(RegInterruptEn,irqEn|0x80);
  77.       for(i=0;i<pi->MfLength;i++)
  78.       {
  79.          WriteRC(RegFIFOData,pi->MfData[i]);
  80.       }
  81.       WriteRC(RegCommand,pi->MfCommand);
  82.       i=0x2000;
  83.       do
  84.       {
  85.          n=ReadRC(RegInterruptRq);
  86.          i--;
  87.       }
  88.       while((i!=0)&&!(n&irqEn&0x20)&&!(n&waitFor));
  89.       status=MI_COM_ERR;
  90.       if((i!=0)&&!(n&irqEn&0x20))
  91.       {
  92.          if(!(ReadRC(RegErrorFlag)&0x17))
  93.          {
  94.             status=MI_OK;
  95.             if(recebyte)
  96.             {
  97.                n=ReadRC(RegFIFOLength);
  98.                lastBits=ReadRC(RegSecondaryStatus)&0x07;
  99.                 if(lastBits)
  100.                 {
  101.                    pi->MfLength=(n-1)*8+lastBits;
  102.                 }
  103.                 else
  104.                 {
  105.                    pi->MfLength=n*8;
  106.                 }
  107.                 if(n==0)
  108.                 {
  109.                    n=1;
  110.                 }
  111.                 for(i=0;i<n;i++)
  112.                 {
  113.                       pi->MfData[i]=ReadRC(RegFIFOData);
  114.                 }
  115.             }
  116.          }
  117.       }
  118.       else if(n&irqEn&0x20)
  119.       {
  120.           status=MI_NOTAGERR;
  121.       }
  122.       else
  123.       {
  124.           status=MI_COM_ERR;
  125.       }
  126.       WriteRC(RegInterruptEn,0x7F);
  127.       WriteRC(RegInterruptRq,0x7F);
  128.    }
  129.    return status;
  130. }