rc522.#3

f330与mfrc522 通信 构成读卡器 上传源码和原理图。

        if (status != MI_ERR)
        {    status = MI_OK;    }
    }
    
    if (status != MI_OK)
    {    return MI_ERR;   }
    
    ucComMF522Buf[0] = PICC_TRANSFER;
    ucComMF522Buf[1] = goaladdr;       //目的块地址

    CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);
     //保存缓冲区数据到目的块
    status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

    if ((status != MI_OK) || (unLen != 4) || ((ucComMF522Buf[0] & 0x0F) != 0x0A))
    {   status = MI_ERR;   }

    return status;
}


/////////////////////////////////////////////////////////////////////
//功    能：命令卡片进入休眠状态
//返    回: 成功返回MI_OK
/////////////////////////////////////////////////////////////////////
char PcdHalt(void)
{
    char status;
    unsigned int  unLen;
    unsigned char ucComMF522Buf[MAXRLEN]; 

    ucComMF522Buf[0] = PICC_HALT;
    ucComMF522Buf[1] = 0;
    CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);
 
    status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

    return MI_OK;
}

/////////////////////////////////////////////////////////////////////
//用MF522计算CRC16函数
/////////////////////////////////////////////////////////////////////
void CalulateCRC(unsigned char *pIndata,unsigned char len,unsigned char *pOutData)
{
    unsigned char i,n;
    ClearBitMask(DivIrqReg,0x04);
    WriteRawRC(CommandReg,PCD_IDLE);
    SetBitMask(FIFOLevelReg,0x80);
    for (i=0; i<len; i++)
    {   WriteRawRC(FIFODataReg, *(pIndata+i));   }
    WriteRawRC(CommandReg, PCD_CALCCRC);
    i = 0xFF;
    do 
    {
        n = ReadRawRC(DivIrqReg);
        i--;
    }
    while ((i!=0) && !(n&0x04));
    pOutData[0] = ReadRawRC(CRCResultRegL);
    pOutData[1] = ReadRawRC(CRCResultRegM);
}

/////////////////////////////////////////////////////////////////////
//功    能：复位RC522
//返    回: 成功返回MI_OK
/////////////////////////////////////////////////////////////////////
char PcdReset(void)
{
   UCHAR  KKK;

    MF522_RST=1;
    Delay1ms(5);
    MF522_RST=0;
    Delay1ms(5);
    MF522_RST=1;
    Delay1ms(5);
    WriteRawRC(CommandReg,PCD_RESETPHASE);
    Delay1ms(5);
    
    WriteRawRC(ModeReg,0x3D);       //和Mifare卡通讯，CRC初始值0x6363
    WriteRawRC(TReloadRegL,0x1E);           
    WriteRawRC(TReloadRegH,0);
    WriteRawRC(TModeReg,0x8D);
    WriteRawRC(TPrescalerReg,0x3E);
    WriteRawRC(TxAskReg,0x40);
   
    return MI_OK;
}

/////////////////////////////////////////////////////////////////////
//功    能：读RC632寄存器
//参数说明：Address[IN]:寄存器地址
//返    回：读出的值
/////////////////////////////////////////////////////////////////////
unsigned char ReadRawRC(unsigned char Address)
{
    unsigned char i, ucAddr;
     unsigned char ucResult=0;

     MF522_SCK = 0;
     MF522_NSS = 0;
     ucAddr = ((Address<<1)&0x7E)|0x80;

     for(i=8;i>0;i--)
     {
         MF522_SI = ((ucAddr&0x80)==0x80);
         MF522_SCK = 1;
         ucAddr <<= 1;
         MF522_SCK = 0;
     }

     for(i=8;i>0;i--)
     {
         MF522_SCK = 1;
         ucResult <<= 1;
         ucResult|=(bit)MF522_SO;
         MF522_SCK = 0;
     }

     MF522_NSS = 1;
     MF522_SCK = 1;
     return ucResult;
}

/////////////////////////////////////////////////////////////////////
//功    能：写RC632寄存器
//参数说明：Address[IN]:寄存器地址
//          value[IN]:写入的值
/////////////////////////////////////////////////////////////////////
void WriteRawRC(unsigned char Address, unsigned char value)
{  
    unsigned char i, ucAddr;

    MF522_SCK = 0;
    MF522_NSS = 0;
    ucAddr = ((Address<<1)&0x7E);

    for(i=8;i>0;i--)
    {
        MF522_SI = ((ucAddr&0x80)==0x80);
        MF522_SCK = 1;
        ucAddr <<= 1;
        MF522_SCK = 0;
    }

    for(i=8;i>0;i--)
    {
        MF522_SI = ((value&0x80)==0x80);
        MF522_SCK = 1;
        value <<= 1;
        MF522_SCK = 0;
    }
    MF522_NSS = 1;
    MF522_SCK = 1;
}

/////////////////////////////////////////////////////////////////////
//功    能：置RC522寄存器位
//参数说明：reg[IN]:寄存器地址
//          mask[IN]:置位值
/////////////////////////////////////////////////////////////////////
void SetBitMask(unsigned char reg,unsigned char mask)  
{
    char tmp = 0x0;
    tmp = ReadRawRC(reg);
    WriteRawRC(reg,tmp | mask);  // set bit mask
}

/////////////////////////////////////////////////////////////////////
//功    能：清RC522寄存器位
//参数说明：reg[IN]:寄存器地址
//          mask[IN]:清位值
/////////////////////////////////////////////////////////////////////
void ClearBitMask(unsigned char reg,unsigned char mask)  
{
    char tmp = 0x0;
    tmp = ReadRawRC(reg);
    WriteRawRC(reg, tmp & ~mask);  // clear bit mask
} 

/////////////////////////////////////////////////////////////////////
//功    能：通过RC522和ISO14443卡通讯
//参数说明：
/////////////////////////////////////////////////////////////////////
char PcdComMF522(unsigned char Command,     //RC522命令字
                 unsigned char *pInData,    //通过RC522发送到卡片的数据
                 unsigned char InLenByte,   //InLenByte[IN]:发送数据的字节长度
                 unsigned char *pOutData,   //pOutData[OUT]:接收到的卡片返回数据
                 unsigned int  *pOutLenBit) //*pOutLenBit[OUT]:返回数据的位长度
{
    char status = MI_ERR;
    unsigned char irqEn   = 0x00;
    unsigned char waitFor = 0x00;
    unsigned char lastBits;
    unsigned char n;
    unsigned int i;
    switch (Command)
    {
       case PCD_AUTHENT:         //密码验证：0EH
          irqEn   = 0x12;
          waitFor = 0x10;
          break;
       case PCD_TRANSCEIVE:      //数据收发：0CH
          irqEn   = 0x77;
          waitFor = 0x30;
          break;
       default:
         break;
    }
   
    WriteRawRC(ComIEnReg,irqEn|0x80);  //
    ClearBitMask(ComIrqReg,0x80);
    WriteRawRC(CommandReg,PCD_IDLE);
    SetBitMask(FIFOLevelReg,0x80);
    
    for (i=0; i<InLenByte; i++)
    {   WriteRawRC(FIFODataReg, pInData[i]);    }
    WriteRawRC(CommandReg, Command);
   
    
    if (Command == PCD_TRANSCEIVE)
    {    SetBitMask(BitFramingReg,0x80);  }
    
    i = 600;//根据时钟频率调整，操作M1卡最大等待时间25ms
    do 
    {
         n = ReadRawRC(ComIrqReg);
         i--;
    }
    while ((i!=0) && !(n&0x01) && !(n&waitFor));
    ClearBitMask(BitFramingReg,0x80);
	      
    if (i!=0)
    {    
         if(!(ReadRawRC(ErrorReg)&0x1B))
         {
             status = MI_OK;
             if (n & irqEn & 0x01)
             {   status = MI_NOTAGERR;   }
             if (Command == PCD_TRANSCEIVE)
             {
               	n = ReadRawRC(FIFOLevelReg);
              	lastBits = ReadRawRC(ControlReg) & 0x07;
                if (lastBits)
                {   *pOutLenBit = (n-1)*8 + lastBits;   }
                else
                {   *pOutLenBit = n*8;   }
                if (n == 0)
                {   n = 1;    }
                if (n > MAXRLEN)
                {   n = MAXRLEN;   }
                for (i=0; i<n; i++)
                {   pOutData[i] = ReadRawRC(FIFODataReg);    }
            }
         }
         else
         {   status = MI_ERR;   }
        
   }
   

   SetBitMask(ControlReg,0x80);           // stop timer now
   WriteRawRC(CommandReg,PCD_IDLE); 
   return status;
}


/////////////////////////////////////////////////////////////////////
//开启天线  
//每次启动或关闭天线发射之间应至少有1ms的间隔
/////////////////////////////////////////////////////////////////////
void PcdAntennaOn()
{
    unsigned char i;
    i = ReadRawRC(TxControlReg);
    if (!(i & 0x03))
    {   //TX1RFEN，TX2RFEN=11
        SetBitMask(TxControlReg, 0x03);
    }
}


/////////////////////////////////////////////////////////////////////
//关闭天线，//TX1RFEN，TX2RFEN=11
/////////////////////////////////////////////////////////////////////
void PcdAntennaOff()
{
    ClearBitMask(TxControlReg, 0x03);
}