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想做一个52+RC500的读卡器，但老是寻不到卡，求指点

#include
#include
#include

sbit    data1=P3^3;
sbit    data0=P3^2;
sbit    beep=P1^4;
sbit    grn=P1^5;
sbit    red=P1^7;
sbit    rst500=P3^5;

unsigned char buff[20],Card_UID[5];

void Nop(void)
{
unsigned char i;
for(i=0;i<5;i++)
{
}
}

//============================================

//=====================================================

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;
}

//----------------------------------------------------------

char PcdAnticoll(uchar *snr)
{
uchar i;
uchar snr_check=0;
char status=MI_OK;
idata struct TranSciveBuffer{uchar MfCommand;
                              uchar MfLength;
                              uchar MfData[5];
                              }MfComData;
struct TranSciveBuffer *pi;

pi=&MfComData;
PcdSetTmo(106);
WriteRC(RegDecoderControl,0x28);
ClearBitMask(RegControl,0x08);
WriteRC(RegChannelRedundancy,0x03);

MfComData.MfCommand=PCD_TRANSCEIVE;
MfComData.MfLength=2;
MfComData.MfData[0]=PICC_ANTICOLL1;
MfComData.MfData[1]=0x20;
status=PcdComTransceive(pi);
if(!status)
{
   for(i=0;i<4;i++)
      {
         snr_check^=MfComData.MfData[i];
      }
      if(snr_check!=MfComData.MfData[i])
      {
         status=MI_SERNRERR;
      }
      else
      {
         for(i=0;i<4;i++)
         {
         *(snr+i)=MfComData.MfData[i];
         }
      }

}
ClearBitMask(RegDecoderControl,0x20);
return status;
}
//*********************************************
unsigned char Get_UID()
{
  unsigned char i;
   for(i=0;i<5;i++)
   buff[i]=P0;
   Card_UID[i]=buff[i];
return(0);
}
//========================
void delay(unsigned char i)
{
  unsigned char k,j;
  for(j=0;j<50;j++)
   {  //wdog=~wdog;
      for(k=0;k
         {
            ;
            }
   }
}
//============================
void delay_50us(void)
{
  unsigned char i;
  for(i=0;i<14;i++)
   {
   }
}
//=============================
void send_wiegend_data(void)
{
unsigned char k,j,temp;
  data1=0;
  data0=1;
  delay_50us();
  data0=1;
  data1=1;
  delay(1);
  for(k=0;k<4;k++)
   {
   temp=Card_UID[k];
   for(j=0;j<8;j++)
      {
         if(temp&0x80)data1=0;
         else data0=0;
         delay_50us();
         data1=1;
         data0=1;
         delay(1);
         temp=temp<<1;
      }

   }
data1=0;
data0=1;
delay_50us();
data1=1;
data0=1;
}

//=============================

void main(void)
{
  unsigned char i,k,temp,temp_buff[4];

  unsigned char request,anticoll;

  data0=1;
  data1=1;
  delay(200);
  beep=0;
  red=0;


  rst500=1;
  delay(200);
  delay(200);
  beep=1;


  rst500=0;
  delay(200);

  data0=1;
  data1=1;
while(1)

      {
      //if(Card_UID[0]!=temp_buff[0]||Card_UID[1]!=temp_buff[1]||Card_UID[2]!=temp_buff[2]||Card_UID[3]!=temp_buff[3])
   request=PcdRequest();
   anticoll=PcdAnticoll();

   if ((request==0)&&(anticoll==0))
   {
         grn=0;
   }
   else
   continue;




         { data0=1;
            data1=1;
            send_wiegend_data();
            beep=0;
   grn=0;
            delay(150);
            delay(100);
            beep=1;
   grn=1;
            data0=1;
            data1=1;
            for(k=0;k<4;k++)temp_buff[k]=P0;
            }
      }


}

提问者：xtl1117 地点：- 浏览次数：3312 提问时间：02-01 17:31

我有更好的答案

3条回答: mi382829 02-05 20:46 回答数：0 被采纳数：0

你的程序还不完整

 评论0  赞93; zrl12123456 02-06 19:31 回答数：0 被采纳数：0

大多数都是底层函数有问题

 评论0  赞91; sosolala 02-10 21:11 回答数：0 被采纳数：0

如果硬件经验不足或者没有合适的测试设备，第一次弄最好弄个能正常工作的电路（最好是别人弄得，能正常读卡），然后自己写程序，一开始啥都弄，你咋排除硬件问题

 评论0  赞98

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