stc驱动rc632读卡器问题

只看该作者 · 2014-5-7 11:33

我用stc驱动rc632，利用iso14443b通讯协议，现在在request的时候出现status = MI_COM_ERR，有经验的乐于帮助的求指教，有偿的啊存进打架学习，很急，有意愿的加我qq，843079356

只看该作者 · 2014-5-7 11:36

我的程序：
void main(void)
{
InitializeSystem();
Rc632Ready();
PcdAntennaOff();
DelayMs(10);
PcdAntennaOn();
PcdConfigISOType( 'B' );
while(1)
{
      if(M531PiccRequestB(PICC_REQBSTD,0,0,g_cReceBuf)==MI_OK)
      {
P2 &=0xe7; //ºìÂÌÉ«Ö¸Ê¾µÆÁÁ
      }
}
}

void InitializeSystem(void)
{
//IO¿Ú³õÊ¼»¯
P0 = 0xff;
P1 = 0xff;
P2 = 0xff;
P3 = 0xff;

SCON = 0x50;    //SCON: serail mode 1, 8-bit UART, enable ucvr
TMOD &= 0x0F;
TMOD = 0x21;    //TMOD: timer 1, mode 2, 8-bit reload
PCON = 0x80;
TH1  = 0xFd;    //Baud:9600  fosc=11.0592MHz
TL1  = TH1;
TR1 = 1;       // timer 1 run
ES  = 0;
EA  = 0;
IE |= 0x90;
}

/////////////////////////////////////////////////////////////////////
//³õÊ¼»¯RC632
/////////////////////////////////////////////////////////////////////
void Rc632Ready(void)
{
char status;
DelayMs(100);
DelayMs(100);
DelayMs(100);
DelayMs(100);
DelayMs(100);
DelayMs(100);
DelayMs(100);

status = PcdReset();
if(status != MI_OK)
{
      DelayMs(10);
      status = PcdReset();
}
if(status != MI_OK)
{
      DelayMs(10);
      status = PcdReset();
}
if(status == MI_OK)
{
      //ºìÉ«Ö¸Ê¾µÆÁÁ£¬±íÊ¾RC632¸´Î»³É¹¦
   P2 &= 0xef;
}
}

//REQUEST B
//////////////////////////////////////////////////////////////////////
char M531PiccRequestB(unsigned char req_code,
                  unsigned char AFI,
                  unsigned char N,
                  unsigned char *ATQB)
{
char  status;
struct TranSciveBuffer MfComData;
struct TranSciveBuffer *pi;
pi=&MfComData;

ClearBitMask(RegControl,0x08);    // disable crypto 1 unit

SetBitMask(RegTxControl,0x03);    // Tx2RF-En, Tx1RF-En enable

PcdSetTmo(5);
MfComData.MfCommand = PCD_TRANSCEIVE;
MfComData.MfLength  = 3;
MfComData.MfData[0] = ISO14443B_ANTICOLLISION;          // APf code
MfComData.MfData[1] = AFI;             //
MfComData.MfData[2] = ((req_code<<3)&0x08) | (N&0x07);  // PARAM

status = PcdComTransceive(pi);

if (status!=MI_OK && status!=MI_NOTAGERR)
{
status = MI_COLLERR; }

if (MfComData.MfLength != 96)
{
      //P2 &= 0xf7;
      status = MI_COM_ERR; /////程序就跑到这里
}

if (status == MI_OK)
{
      memcpy(ATQB, &MfComData.MfData[0], 16);
      PcdSetTmo(ATQB[11]>>4);
}
return status;
}