STM32 RC522相关驱动

只看该作者 · 2018-2-28 21:23

本帖最后由 gaoke231 于 2018-2-28 21:44 编辑

关于RC522的一些函数常用的还是前面几个吧。足以应对门禁系统

RC522初始化
void RC522_Init(void)
{
      GPIO_InitTypeDef  GPIO_InitStructure;
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF, ENABLE);          //使能PF端口时钟

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_0|GPIO_Pin_2|GPIO_Pin_4;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;       //推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;       //IO口速度为50MHz
      GPIO_Init(GPIOF, &GPIO_InitStructure);
      GPIO_SetBits(GPIOF,GPIO_Pin_1|GPIO_Pin_0|GPIO_Pin_2|GPIO_Pin_4);  //拉高

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;       //上拉输入
      GPIO_Init(GPIOF, &GPIO_InitStructure);
}

只看该作者 · 2018-2-28 21:24

//寻卡
char PcdRequest(unsigned char req_code,unsigned char *pTagType)
{
char status;
unsigned int  unLen;
unsigned char ucComMF522Buf[MAXRLEN];

ClearBitMask(Status2Reg,0x08);
WriteRawRC(BitFramingReg,0x07);
SetBitMask(TxControlReg,0x03);

ucComMF522Buf[0] = req_code;

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);

if ((status == MI_OK) && (unLen == 0x10))
{
   *pTagType    = ucComMF522Buf[0];
   *(pTagType+1) = ucComMF522Buf[1];
}
else
{ status = MI_ERR;
      }

return status;
}

只看该作者 · 2018-2-28 21:25

//防冲撞
char PcdAnticoll(unsigned char *pSnr)
{
char status;
unsigned char i,snr_check=0;
unsigned int  unLen;
unsigned char ucComMF522Buf[MAXRLEN];

ClearBitMask(Status2Reg,0x08);
WriteRawRC(BitFramingReg,0x00);
ClearBitMask(CollReg,0x80);

ucComMF522Buf[0] = PICC_ANTICOLL1;
ucComMF522Buf[1] = 0x20;

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,2,ucComMF522Buf,&unLen);

if (status == MI_OK)
{
   for (i=0; i<4; i++)
      {
         *(pSnr+i)  = ucComMF522Buf[i];
         snr_check ^= ucComMF522Buf[i];

      }
      if (snr_check != ucComMF522Buf[i])
      { status = MI_ERR; }
}

SetBitMask(CollReg,0x80);
return status;
}

只看该作者 · 2018-2-28 21:26

//选卡
char PcdSelect(unsigned char *pSnr)
{
char status;
unsigned char i;
unsigned int  unLen;
unsigned char ucComMF522Buf[MAXRLEN];

ucComMF522Buf[0] = PICC_ANTICOLL1;
ucComMF522Buf[1] = 0x70;
ucComMF522Buf[6] = 0;
for (i=0; i<4; i++)
{
ucComMF522Buf[i+2] = *(pSnr+i);
ucComMF522Buf[6]  ^= *(pSnr+i);
}
CalulateCRC(ucComMF522Buf,7,&ucComMF522Buf[7]);

ClearBitMask(Status2Reg,0x08);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,9,ucComMF522Buf,&unLen);

if ((status == MI_OK) && (unLen == 0x18))
{ status = MI_OK;  }
else
{ status = MI_ERR; }

return status;
}

只看该作者 · 2018-2-28 21:27

//验证卡片密码

char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr)
{
char status;
unsigned int unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];

ucComMF522Buf[0] = auth_mode;
ucComMF522Buf[1] = addr;
for (i=0; i<6; i++)
{ ucComMF522Buf[i+2] = *(pKey+i); }
for (i=0; i<6; i++)
{ ucComMF522Buf[i+8] = *(pSnr+i); }
// memcpy(&ucComMF522Buf[2], pKey, 6);
// memcpy(&ucComMF522Buf[8], pSnr, 4);

status = PcdComMF522(PCD_AUTHENT,ucComMF522Buf,12,ucComMF522Buf,&unLen);
if ((status != MI_OK) || (!(ReadRawRC(Status2Reg) & 0x08)))
{ status = MI_ERR; }

return status;
}

只看该作者 · 2018-2-28 21:28

//读取M1卡一块数据
char PcdRead(unsigned char addr,unsigned char *pData)
{
char status;
unsigned int  unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];

ucComMF522Buf[0] = PICC_READ;
ucComMF522Buf[1] = addr;
CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);
if ((status == MI_OK) && (unLen == 0x90))
// { memcpy(pData, ucComMF522Buf, 16); }
{
      for (i=0; i<16; i++)
      { *(pData+i) = ucComMF522Buf[i]; }
}
else
{ status = MI_ERR; }

return status;
}

只看该作者 · 2018-2-28 21:29

//写数据到M1卡一块
char PcdWrite(unsigned char addr,unsigned char *pData)
{
char status;
unsigned int  unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];

ucComMF522Buf[0] = PICC_WRITE;
ucComMF522Buf[1] = addr;
CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

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

if (status == MI_OK)
{
      //memcpy(ucComMF522Buf, pData, 16);
      for (i=0; i<16; i++)
      { ucComMF522Buf = *(pData+i); }
      CalulateCRC(ucComMF522Buf,16,&ucComMF522Buf[16]);

      status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,18,ucComMF522Buf,&unLen);
      if ((status != MI_OK) || (unLen != 4) || ((ucComMF522Buf[0] & 0x0F) != 0x0A))
      { status = MI_ERR; }
}

return status;
}

只看该作者 · 2018-2-28 21:30

//扣款和充值
char PcdValue(unsigned char dd_mode,unsigned char addr,unsigned char *pValue)
{
char status;
unsigned int  unLen;
unsigned char i,ucComMF522Buf[MAXRLEN];

ucComMF522Buf[0] = dd_mode;
ucComMF522Buf[1] = addr;
CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

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

if (status == MI_OK)
{
   // memcpy(ucComMF522Buf, pValue, 4);
      for (i=0; i<16; i++)
      { ucComMF522Buf = *(pValue+i); }
      CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);
      unLen = 0;
      status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);
      if (status != MI_ERR)
      { status = MI_OK; }
}

if (status == MI_OK)
{
      ucComMF522Buf[0] = PICC_TRANSFER;
      ucComMF522Buf[1] = addr;
      CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

      status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

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

只看该作者 · 2018-2-28 21:32

//备份钱包
char PcdBakValue(unsigned char sourceaddr, unsigned char goaladdr)
{
char status;
unsigned int  unLen;
unsigned char ucComMF522Buf[MAXRLEN];

ucComMF522Buf[0] = PICC_RESTORE;
ucComMF522Buf[1] = sourceaddr;
CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

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

if (status == MI_OK)
{
      ucComMF522Buf[0] = 0;
      ucComMF522Buf[1] = 0;
      ucComMF522Buf[2] = 0;
      ucComMF522Buf[3] = 0;
      CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);

      status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen);
      if (status != MI_ERR)
      { status = MI_OK; }
}

if (status != MI_OK)
{ return MI_ERR; }

ucComMF522Buf[0] = PICC_TRANSFER;
ucComMF522Buf[1] = goaladdr;

CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);

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

return status;
}

只看该作者 · 2018-2-28 21:33

//命令卡片进入休眠状态

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;
}

只看该作者 · 2018-2-28 21:34

//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);
}

只看该作者 · 2018-2-28 21:35

// 复位RC522char PcdReset(void)
{
//unsigned char i;
MF522_RST=1;

delay_us(10);

MF522_RST=0;

delay_us(10);

MF522_RST=1;

delay_us(10);

WriteRawRC(CommandReg,PCD_RESETPHASE);

delay_us(10);

WriteRawRC(ModeReg,0x3D);          //和Mifare卡通讯，CRC初始值0x6363
WriteRawRC(TReloadRegL,30);
WriteRawRC(TReloadRegH,0);
WriteRawRC(TModeReg,0x8D);
WriteRawRC(TPrescalerReg,0x3E);
WriteRawRC(TxAutoReg,0x40);
return MI_OK;
}

只看该作者 · 2018-2-28 21:36

//读RC632寄存器
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;
   delay_us(10);    //STM32需要多加的延时时间。51的不需要加
   }

   for(i=8;i>0;i--)
   {
      MF522_SCK = 1;
      ucResult <<= 1;
      ucResult|=MF522_SO;
      MF522_SCK = 0;
   delay_us(10);    //STM32需要多加的延时时间。51的不需要加
   }

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

只看该作者 · 2018-2-28 21:37

// 写RC632寄存器
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;
delay_us(10);    //STM32需要多加的延时时间。51的不需要加
}

for(i=8;i>0;i--)
{
      MF522_SI = ((value&0x80)==0x80);
      MF522_SCK = 1;
      value <<= 1;
      MF522_SCK = 0;
delay_us(10);    //STM32需要多加的延时时间。51的不需要加
}
MF522_NSS = 1;
MF522_SCK = 1;
}

只看该作者 · 2018-2-28 21:37

//置RC522寄存器位
void SetBitMask(unsigned char reg,unsigned char mask)
{
char tmp = 0x0;
tmp = ReadRawRC(reg);
WriteRawRC(reg,tmp | mask); // set bit mask
}

只看该作者 · 2018-2-28 21:40

//清RC522寄存器位
void ClearBitMask(unsigned char reg,unsigned char mask)
{
char tmp = 0x0;
tmp = ReadRawRC(reg);
WriteRawRC(reg, tmp & ~mask); // clear bit mask
}

只看该作者 · 2018-2-28 21:41

//通过RC522和ISO14443卡通讯
char PcdComMF522(unsigned char Command,
               unsigned char *pInData,
               unsigned char InLenByte,
               unsigned char *pOutData,
               unsigned int  *pOutLenBit)
{
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:
      irqEn = 0x12;
      waitFor = 0x10;
      break;
   case PCD_TRANSCEIVE:
      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;
}

只看该作者 · 2018-2-28 21:41

//开启天线
void PcdAntennaOn()
{
unsigned char i;
i = ReadRawRC(TxControlReg);
if (!(i & 0x03))
{
SetBitMask(TxControlReg, 0x03);
}
}

只看该作者 · 2018-2-28 21:42

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

只看该作者 · 2018-2-28 21:46

MFRC522是高度集成的非接触式（13.56MHz）读写卡芯片，此发送模块利用调制和调节的原理，并将它们完全集成到各种非接触式通信方法和协议中。它支持ISO14443A/MIFARE。关于电路的工作原理，我也不能详解，大家可以自己查资料，这里仅针对通信过程做一个详细的介绍，希望对看到的人有所帮助。