MFRC522射频识别参考程序注释new

1、By 曙光单片机科技 RC522程序读书笔记 详细注释MF RC522 射频识别参考程序注释串口读取的数据/- ucAddr = (Address<<1)&0x7E)|0x80;/变化成有效的地址形式，最低位为0，最高位为1时候是，从MFRC522读出数据，参考39页/ 读SPI数据 /-unsigned char SPIReadByte(void) unsigned char data SPICount; / Counter used to clock out the data unsigned char data SPIData; SPIData = 0; for (S

2、PICount = 0; SPICount < 8; SPICount+) / Prepare to clock in the data to be read SPIData <<=1; / Rotate the data CLR_SPI_CK; nop();nop(); / Raise the clock to clock the data out of the MAX7456 if(STU_SPI_MISO) SPIData|=0x01; SET_SPI_CK; nop();nop(); / Drop the clock ready for the next bit /

3、and loop back return (SPIData); / Finally return the read data /-/ 写SPI数据 /-void SPIWriteByte(unsigned char data SPIData) unsigned char data SPICount; / Counter used to clock out the data for (SPICount = 0; SPICount < 8; SPICount+) if (SPIData & 0x80) SET_SPI_MOSI; else CLR_SPI_MOSI; nop();no

4、p(); CLR_SPI_CK;nop();nop(); SET_SPI_CK;nop();nop(); SPIData <<= 1; /功 能：寻卡/参数说明: req_codeIN:寻卡方式/ 0x52 = 寻感应区内所有符合14443A标准的卡/ 0x26 = 寻未进入休眠状态的卡/ pTagTypeOUT：卡片类型代码/ 0x4400 = Mifare_UltraLight/ 0x0400 = Mifare_One(S50)/ 0x0200 = Mifare_One(S70)/ 0x0800 = Mifare_Pro(X)/ 0x4403 = Mifare_DESFire/

5、返 回: 成功返回MI_OK/char PcdRequest(unsigned char data req_code,unsigned char *pTagType)char data status; unsigned int data unLen;unsigned char data ucComMF522BufMAXRLEN; ClearBitMask(Status2Reg,0x08);/清除MRCrypto1on，要用软件清零WriteRawRC(BitFramingReg,0x07);/startsend=0,rxalign=0,在FIFO中存放的位置，TXlastbit=7SetBit

6、Mask(TxControlReg,0x03);/TX2rfen=1,TX1RFen=1,传递调制的13.56MHZ的载波信号 ucComMF522Buf0 = req_code;status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,1,ucComMF522Buf,&unLen);/*8if (status = MI_OK) && (unLen = 0x10) *pTagType = ucComMF522Buf0;*(pTagType+1) = ucComMF522Buf1;else status = MI_ERR; ret

7、urn status;/功 能：防冲撞/参数说明: pSnrOUT:卡片序列号，4字节/返 回: 成功返回MI_OK/ char PcdAnticoll(unsigned char *pSnr) char data status; unsigned char data i,snr_check=0; unsigned int data unLen; unsigned char data ucComMF522BufMAXRLEN; ClearBitMask(Status2Reg,0x08); /清除MRCrypto1on，要用软件清零 WriteRawRC(BitFramingReg,0x00);

8、 /表示最后一个字节所有位都发送 ClearBitMask(CollReg,0x80); /CollRegCollReg0冲突结束后冲突位被置零 ucComMF522Buf0 = PICC_ANTICOLL1; ucComMF522Buf1 = 0x20; status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,2,ucComMF522Buf,&unLen); if (status = MI_OK) for (i=0; i<4; i+) *(pSnr+i) = ucComMF522Bufi;/? snr_check = ucComMF5

9、22Bufi; /? if (snr_check != ucComMF522Bufi) status = MI_ERR; SetBitMask(CollReg,0x80); /CollRegCollReg在106kbps良好的防冲突情况下该位置1 return status;/功 能：选定卡片/参数说明: pSnrIN:卡片序列号，4字节/返 回: 成功返回MI_OK/char PcdSelect(unsigned char *pSnr) char data status; unsigned char data i; unsigned int data unLen; unsigned char

10、 data ucComMF522BufMAXRLEN; ucComMF522Buf0 = PICC_ANTICOLL1; ucComMF522Buf1 = 0x70; ucComMF522Buf6 = 0; for (i=0; i<4; i+) ucComMF522Bufi+2 = *(pSnr+i); ucComMF522Buf6 = *(pSnr+i); CalulateCRC(ucComMF522Buf,7,&ucComMF522Buf7); /# ClearBitMask(Status2Reg,0x08);/清零MFcryon status = PcdComMF522(P

11、CD_TRANSCEIVE,ucComMF522Buf,9,ucComMF522Buf,&unLen); if (status = MI_OK) && (unLen = 0x18) status = MI_OK; else status = MI_ERR; return status;/功 能：验证卡片密码/参数说明: auth_modeIN: 密码验证模式/ 0x60 = 验证A密钥/ 0x61 = 验证B密钥 / addrIN：块地址/ pKeyIN：密码/ pSnrIN：卡片序列号，4字节/返 回: 成功返回MI_OK/ char PcdAuthState(uns

12、igned char data auth_mode,unsigned char data addr,unsigned char *pKey,unsigned char *pSnr) char data status; unsigned int data unLen; unsigned char data i,ucComMF522BufMAXRLEN; ucComMF522Buf0 = auth_mode; /验证A密钥 ucComMF522Buf1 = addr; /addrIN：块地址 for (i=0; i<6; i+) ucComMF522Bufi+2 = *(pKey+i); f

13、or (i=0; i<6; i+) ucComMF522Bufi+8 = *(pSnr+i); / memcpy(&ucComMF522Buf2, pKey, 6); / memcpy(&ucComMF522Buf8, pSnr, 4); status = PcdComMF522(PCD_AUTHENT,ucComMF522Buf,12,ucComMF522Buf,&unLen); if (status != MI_OK) | (!(ReadRawRC(Status2Reg) & 0x08) status = MI_ERR; return status;/

14、功 能：读取M1卡一块数据/参数说明: addrIN：块地址/ pDataOUT：读出的数据，16字节/返 回: 成功返回MI_OK/ char PcdRead(unsigned char data addr,unsigned char *pData) char data status; unsigned int data unLen; unsigned char data i,ucComMF522BufMAXRLEN; ucComMF522Buf0 = PICC_READ; ucComMF522Buf1 = addr; CalulateCRC(ucComMF522Buf,2,&ucC

15、omMF522Buf2); 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) = ucComMF522Bufi; else status = MI_ERR; return status;/功 能：写数据到M1卡一块/参数说明: addrIN：块地址/ pDat

16、aIN：写入的数据，16字节/返 回: 成功返回MI_OK/ char PcdWrite(unsigned char data addr,unsigned char *pData) char data status; unsigned int data unLen; unsigned char data i,ucComMF522BufMAXRLEN; ucComMF522Buf0 = PICC_WRITE; ucComMF522Buf1 = addr; CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf2); status = PcdComMF522(

17、PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen); if (status != MI_OK) | (unLen != 4) | (ucComMF522Buf0 & 0x0F) != 0x0A) status = MI_ERR; if (status = MI_OK) /memcpy(ucComMF522Buf, pData, 16); for (i=0; i<16; i+) ucComMF522Bufi = *(pData+i); CalulateCRC(ucComMF522Buf,16,&ucComMF52

18、2Buf16); status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,18,ucComMF522Buf,&unLen); if (status != MI_OK) | (unLen != 4) | (ucComMF522Buf0 & 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 data status; unsigned int data unLen; unsigned cha

19、r data ucComMF522BufMAXRLEN; ucComMF522Buf0 = PICC_HALT; ucComMF522Buf1 = 0; CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf2); 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 data len,u

20、nsigned char *pOutData) unsigned char data i,n; ClearBitMask(DivIrqReg,0x04); WriteRawRC(CommandReg,PCD_IDLE); /取消当前命令 SetBitMask(FIFOLevelReg,0x80);/FlushBuffer 清除ErrReg 的标志位 for (i=0; i<len; i+) WriteRawRC(FIFODataReg, *(pIndata+i); WriteRawRC(CommandReg, PCD_CALCCRC); i = 0xFF; do n = ReadRawR

21、C(DivIrqReg); i-; while (i!=0) && !(n&0x04); /当CRCIRq 所有数据被处理完毕该位置位 pOutData0 = ReadRawRC(CRCResultRegL); /显示计算出来的CRC值 pOutData1 = ReadRawRC(CRCResultRegM);/功 能：复位RC522/返 回: 成功返回MI_OK/char PcdReset(void)/PORTD|=(1<<RC522RST);SET_RC522RST; delay_ns(10);/PORTD&=(1<<RC522RST

22、);CLR_RC522RST; delay_ns(10);/PORTD|=(1<<RC522RST);SET_RC522RST; delay_ns(10); WriteRawRC(CommandReg,PCD_RESETPHASE);/#define PCD_RESETPHASE 0x0F /复位 delay_ns(10); WriteRawRC(ModeReg,0x3D); /和Mifare卡通讯，CRC初始值0x6363 WriteRawRC(TReloadRegL,30); /定时器的低8位数据， WriteRawRC(TReloadRegH,0); /定时器的高8位数据，

23、WriteRawRC(TModeReg,0x8D); /定时器模式寄存器，定时器减值计数 WriteRawRC(TPrescalerReg,0x3E); /实际值是OXD3E 这部分主要是设置定时器寄存器，#WriteRawRC(TxAutoReg,0x40);/必须要 ，设置逻辑1，强制100%ASK调制 return MI_OK;/设置RC522的工作方式 /char M500PcdConfigISOType(unsigned char data type) if (type = 'A') /ISO14443_A ClearBitMask(Status2Reg,0x08);

24、 /状态2寄存器 WriteRawRC(ModeReg,0x3D);/3F /和Mifare卡通讯，CRC初始值0x6363 WriteRawRC(RxSelReg,0x86);/84 选择内部接收器设置，内部模拟部分调制信号，发送数据后，延迟6个位时钟，接收 WriteRawRC(RFCfgReg,0x7F); /4F 配置接收器 48dB最大增益 WriteRawRC(TReloadRegL,30);/tmoLength);/ TReloadVal = 'h6a =tmoLength(dec) WriteRawRC(TReloadRegH,0); /实际值是OXD3E 这部分主要是

25、设置定时器寄存器，# WriteRawRC(TModeReg,0x8D); WriteRawRC(TPrescalerReg,0x3E); delay_ns(1000); PcdAntennaOn(); else return -1; return MI_OK;/功 能：读RC522寄存器/参数说明：AddressIN:寄存器地址/返 回：读出的值/unsigned char ReadRawRC(unsigned char data Address) unsigned char data ucAddr; unsigned char data ucResult=0;CLR_SPI_CS; ucA

26、ddr = (Address<<1)&0x7E)|0x80;/变化成有效的地址形式，最低位为0，最高位为1时候是，从MFRC522读出数据，参考39页SPIWriteByte(ucAddr);ucResult=SPIReadByte();SET_SPI_CS; return ucResult;/功 能：写RC632寄存器/参数说明：AddressIN:寄存器地址/ valueIN:写入的值/void WriteRawRC(unsigned char data Address, unsigned char data value) unsigned char data ucAd

27、dr;CLR_SPI_CS; ucAddr = (Address<<1)&0x7E);/变化成有效的地址形式，最低为为0，最高位为1时候是，写入MFRC522数据SPIWriteByte(ucAddr);SPIWriteByte(value);SET_SPI_CS;/功 能：置RC522寄存器位/参数说明：regIN:寄存器地址/ maskIN:置位值/void SetBitMask(unsigned char data reg,unsigned char data mask) char data tmp = 0x0; tmp = ReadRawRC(reg); Write

28、RawRC(reg,tmp | mask); / set bit mask/功 能：清RC522寄存器位/参数说明：regIN:寄存器地址/ maskIN:清位值/void ClearBitMask(unsigned char data reg,unsigned char data mask) char data 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：CommandIN:RC522命令字/ pInDataIN

29、:通过RC522发送到卡片的数据/ InLenByteIN:发送数据的字节长度/ pOutDataOUT:接收到的卡片返回数据/ *pOutLenBitOUT:返回数据的位长度/char PcdComMF522(unsigned char data Command, unsigned char *pInData, unsigned char data InLenByte, unsigned char *pOutData, unsigned int *pOutLenBit) char data status = MI_ERR; unsigned char data irqEn = 0x00; u

30、nsigned char data waitFor = 0x00; unsigned char data lastBits; unsigned char data n; unsigned int data i; switch (Command) case PCD_AUTHENT:irqEn = 0x12;waitFor = 0x10;break;case PCD_TRANSCEIVE:/发送并接收数据irqEn = 0x77;waitFor = 0x30;break;default:break; WriteRawRC(ComIEnReg,irqEn|0x80);/容许除定时器中断请求以为得所有中断请求 ClearBitMask(ComIrqReg,0x80);/屏蔽位清除 WriteRawRC(CommandReg,PCD_IDLE);/取消当前命令 SetBitMask(FIFOLevelReg,0x80);/清除FIFO中的读写指针 for (i=0; i<InLenByte; i+) WriteRawRC(FIFODataReg, pInDatai); /写寻卡命令 WriteRawRC(CommandReg, Command);/发送并接收数据 if (Command = PCD_TRANSCEIVE) SetB