MF_RC522_射频识别参考程序注释new

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1、/ucAddr=(Addressvvl)&0x7E)l0x80;变化成有效的地址形式，最低位为0,最高位为1时候时，从MFRC522读出数据，最低位为0,最高位为0时候时，往MFRC522写数据，参考39页/读SPI数据/unsignedcharSPIReadByte(void)/CounterusedtounsignedchardataSPICount;clockoutthedataunsignedchardataSPIData;SPIData=0;/Preparetoclockinthe/Rotatethedata/Raisethefor(SPICount=0;SPICount8;SPIC

2、ount+)datatobereadSPIDatavv=l;CLR_SPI_CK;nop();nop();clocktoclockthedataoutoftheMAX7456if(STU_SPI_MISO)SPIDatal=0x01;22程序读书笔记详细注释22程序读书笔记详细注释/andloopbackreturn(SPIData);/Counterusedto曲耘T_SPI_CK;nop();nop();Droptheclockreadyforthenextbit/Finallyreturnthereaddata/写SPI数据/voidSPIWriteByte(unsignedcharda

3、taSPIData)unsignedchardataSPICount;clockoutthedatafor(SPICount=0;SPICount8;SPICount+)if(SPIData&0x80)SET_SPI_MOSI;elseCLR_SPI_MOSI;nop();nop();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_

4、UltraLight/0x0400=Mifare_One(S50)/0x0200=Mifare_One(S70)/0x0800=Mifare_Pro(X)/0x4403=Mifare_DESFire/返回：成功返回MI_OK/charPcdRequest(unsignedchardatareq_code,unsignedchar*pTagType)如妙2社序以书毛记详细y王释W-chardatastatus;unsignedintdataunLen;unsignedchardataucComMF522BufMAXRLEN;ClearBitMask(Status2Reg,0x08);清除MRCr

5、yptolon,要用软件清零WriteRawRC(BitFramingReg,0x07);/startsend=0,rxalign=0,在FIFO中存放的位置，TXlastbit=7SetBitMask(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,&unLeif(status=MI_OK)&(unLen=0x10)*pTagType=ucComMF5

6、22Buf0;*(pTagType+1)=ucComMF522Buf1;elsestatus=MI_ERR;returnstatus;/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/charPcdAnticoll(unsignedchar*pSnr)chardatastatus;unsignedchardatai,snr_check=0;unsignedintdataunLen;unsignedchardataucComMF522BufMAXRLEN;ClearBitMask(Status2Reg,0x08);清除MRCrypto1on,要用软件清零Wri

7、teRawRC(BitFramingReg,0x00);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status=PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,2,ucComMF522Buf,&unLen);if(status=MI_OK)for(i=0;i4;i+)*(pSnr+i)=ucComMF522Bufi;snr_checkA=ucComMF522Bufi;/if(snr_check!=ucComMF522Bufi)status=MI_ERR;SetBitM

8、ask(CollReg,0x80);/CollRegCollReg在106kbps良好的防冲突情况下该位置1returnstatus;/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/charPcdSelect(unsignedchar*pSnr)chardatastatus;unsignedchardatai;unsignedintdataunLen;unsignedchardataucComMF522BufMAXRLEN;ucComMF522Buf0=PICC_ANTICOLL1;ucComMF522Buf1=0x70;ucComMF522Buf=0;f

9、or(i=0;i4;i+)ucComMF522Bufi+2=*(pSnr+i);ucComMF522Buf6a=*(pSnr+i);CalulateCRC(ucComMF522Buf,7，&ucComMF522Buf7);/#22程序读书笔记详细注释一arBitMask(Status2Reg,0x08);清零MFcryonstatusPcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,9,ucComMF522Buf,&unLen);if(status=MI_OK)&(unLen=0x18)status=MI_OK;elsestatus=MI_ERR;returns

10、tatus;/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/charPcdAuthState(unsignedchardataauth_mode,unsignedchardataaddr,unsignedchar*pKey,unsignedchar*pSnr)chardatastatus;unsignedintdataunLen;unsignedchardatai,ucComMF522BufMAXRLEN;ucComMF522Bu

11、f0=auth_mode;验证A密钥ucComMF522Buf1=addr;/addrIN：块地址for(i=0;i6;i+)ucComMF522Bufi+2=*(pKey+i);for(i=0;i6;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)II(!(ReadRawRC(Sta

12、tus2Reg)&0x08)status=MI_ERR;一22程序读书笔记详细注释如妙2社序以书毛记详细y王释restatus;一22程序读书笔记详细注释一22程序读书笔记详细注释/功能：读取Ml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/charPcdRead(unsignedchardataaddr,unsignedchar*pData)chardatastatus;unsignedintdataunLen;unsignedchardatai,ucComMF522BufMAXRLEN;ucComMF522Buf0=PICC_R

13、EAD;ucComMF522Buf1=addr;CalulateCRC(ucComMF522Buf,2，&ucComMF522Buf2);statusPcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen);if(status=MI_OK)&(unLen=0x90)/memcpy(pData,ucComMF522Buf,16);for(i=0;i16;i+)*(pData+i)=ucComMF522Bufi;elsestatus=MI_ERR;returnstatus;/功能:写数据到M1卡一块参数说明：addrIN：块地

14、址/pDataIN:写入的数据，16字节/返回：成功返回MI_OK/charPcdWrite(unsignedchardataaddr,unsignedchar*pData)chardatastatus;unsignedintdataunLen;unsignedchardatai,ucComMF522BufMAXRLEN;曲盡ComMF522Buf0=PICC_WRITE;ucComMF522Bufl=addr;CalulateCRC(ucComMF522Buf,2，&ucComMF522Buf2);statusPcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,

15、4,ucComMF522Buf,&unLen);if(status!=MI_OK)II(unLen!=4)II(ucComMF522Buf0&OxOF)!=OxOA)status=MI_ERR;if(status=MI_OK)memcpy(ucComMF522Buf,pData,16);for(i=0;i16;i+)ucComMF522Bufi=*(pData+i);CalulateCRC(ucComMF522Buf,16,&ucComMF522Buf16);statusPcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,18,ucComMF522Buf,&unL

16、en);if(status!=MI_OK)|(unLen!=4)|(ucComMF522Buf0&0x0F)!=0x0A)status=MI_ERR;returnstatus;/功能：命令卡片进入休眠状态/返回：成功返回MI_OK/charPcdHalt(void)chardatastatus;unsignedintdataunLen;unsignedchardataucComMF522BufMAXRLEN;ucComMF522Buf0=PICC_HALT;ucComMF522Buf1=0;CalulateCRC(ucComMF522Buf,2，&ucComMF522Buf2);status2

17、2程序读书笔记详细注释returnMI_OK;/用MF522计算CRC16函数/voidCalulateCRC(unsignedchar*pIndata,unsignedchardatalen,unsignedchar*pOutData)unsignedchardatai,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;ivlen;i+)WriteRawRC(FIFODataReg,

18、*(pIndata+i);WriteRawRC(CommandReg,PCD_CALCCRC);i=0xFF;don=ReadRawRC(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/charPcdReset(void)/PORTDI=(1vvRC522RST);SET_RC522RST;delay_ns(10);/PO

19、RTD&=(1vvRC522RST);CLR_RC522RST;delay_ns(10);/PORTDI=(1vvRC522RST);SET_RC522RST;delay_ns(10);PCD_RESETPHASEWriteRawRC(CommandReg,PCD_RESETPHASE);/#define如妙2社序以书毛记详细y王释22程序读书笔记详细注释0A如妙2社序以书毛记详细y王释如妙2社序以书毛记详细y王释xOF复尙eiay_ns(10);WriteRawRC(ModeReg,0x3D);WriteRawRC(TReloadRegL,30);WriteRawRC(TReloadRegH

20、,0);WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);器寄存器，#和Mifare卡通讯，CRC初始值0x6363定时器的低8位数据，定时器的高8位数据，定时器模式寄存器，定时器减值计数实际值是OXD3E这部分主要是设置定时WriteRawRC(TxAutoReg,0x40);必须要，设置逻辑1,强制1OO%ASK调制如妙2社序以书毛记详细y王释如妙2社序以书毛记详细y王释returnMI_OK;/设置RC522的工作方式/charM500PcdConfigISOType(unsignedchardatatype)if(type

21、=A)/ISO14443_AClearBitMask(Status2Reg,0x08);状态2寄存器WriteRawRC(ModeReg,0x3D);/3F/和Mifare卡通讯，CRC初始值0x6363WriteRawRC(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

22、,0);实际值是OXD3E这部分主要是设置定时器寄存器，#WriteRawRC(TModeReg,0x8D);WriteRawRC(TPrescalerReg,0x3E);delay_ns(1000);PcdAntennaOn();elsereturn-1;returnMI_OK;/功能：读RC522寄存器参数说明：AddressIN:寄存器地址返回：读出的值/unsignedcharReadRawRC(unsignedchardataAddress)W-unsignedchardataucAddr;unsignedchardataucResult=O;CLR_SPI_CS;ucAddr=(A

23、ddressvvl)&0x7E)l0x80;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;returnucResult;/功能：写RC632寄存器参数说明：AddressIN:寄存器地址/valueIN:写入的值/voidWriteRawRC(unsignedchardataAddress,unsignedchardatavalue)unsignedchardataucAddr;CLR_SPI_CS;ucAddr=(AddressMAXRLEN

24、)n=MAXRLEN;for(i=0;ivn;i+)i=ReadRawRC(FIFODataReg);elsestatus=MI_ERR;SetBitMask(ControlReg,0x80);/stoptimernowWriteRawRC(CommandReg,PCD_IDLE);returnstatus;/开启天线每次启动或关闭天险发射之间应至少有1ms的间隔/voidPcdAntennaOn(void)unsignedchardatai;i=ReadRawRC(TxControlReg);if(!(i&0x03)SetBitMask(TxControlReg,0x03);txl2RFEN=ll;，打开发射管脚/关闭天线/voidPcdAntennaOff(void)ClearBitMask(TxControlReg,0x03);/tx12RFEN=00;，禁止发射管脚