因为几年没有玩过单片机了所以特意去查一下

RFID->ArduinoGND->SSD10//片选使能SCK->D13//时钟MISI->D11MISO->D123V#->3.3VRST->D5SPIArduinoRC522是从机。MISO<-->MISO,MOSI<-->MOSI，因为，SPI通信TX<-->RX,RX<-->TXSS为LOW的从机通信（SS引脚为LOW的从机才响应主机的呼唤MOSI（MasterOut)MOSI（SlaveIn);从机向主机写入数据时，用的是MISO<-->MISO，对从机而言，是SlaveOut，对主机而言是MasterIn.Request-Tag-----》三次互相确认（3PassAuthentication）通过校验之后，三次互相 #include<SPI.h>#include<RFID.h>RFID //D10--SS引脚、D5--RST引voidsetup()//putyoursetupcodehere,torunonce:}voidloop()if(rfid.isCard()){Serial.println("Findthecard!");if(rfid.readCardSerial()){Serial.print("Thecard'snumberis:");Serial.println("");}，}}开始轮询寻找天线内未进入休眠的卡卡命令：PICC_REQIDL（RFID.h里面定义intchipSelectPinRFID/ENABLERFID::RFID(intchipSelectPin,int{_chipSelectPin=_NRSTPD= //设置管脚_chipSelectPin为输出并连接到模块使 //NRSTPD}RST引脚。init这个函数：void{//RC522 writeMFRC522(TPrescalerReg,0x3E);//TModeReg[3..0]+TPrescalerRegwriteMFRC522(TReloadRegL,30); //CRCvalorinicialde0x6363001111 //RxWait= //RxGain= }void{}voidRFID::writeMFRC522(unsignedcharaddr,unsignedchar{//0}RC522CommandRegturebool{unsignedcharstatus;unsignedcharstatus=MFRC522Request(PICC_REQIDL,str);if(status==MI_OK)returntrue;return}0x4400=0x0400=0x0200=0x0800=0x4403=unsignedcharRFID::MFRC522Request(unsignedcharreqMode,unsignedchar{unsignedcharunsignedint writeMFRC522(BitFramingReg,0x07); //TxLastBists=BitFramingReg[2..0]???TagType[0]=reqMode;//#define 0x0Cif((status!=MI_OK)||(backBits!=0x10))status=MI_ERR;return}unsignedcharRFID::MFRC522ToCard(unsignedcharcommand,unsignedchar*sendData,unsignedcharsendLen,unsignedchar*backData,unsignedint*backLen){unsignedcharstatus=MI_ERR;unsignedcharirqEn=0x00;unsignedcharwaitIRq=0x00;unsignedcharlastBits;unsignedcharn;unsignedinti;switch{case {irqEn=0x12;waitIRq=0x10;}casePCD_TRANSCEIVE://FIFO{irqEn=0x77;waitIRq=0x30;}}writeMFRC522(CommIEnReg,irqEn|0x80);//允许中断请求clearBitMask(CommIrqReg,0x80); setBitMask(FIFOLevelReg,0x80); //FlushBuffer=1,FIFO初始化, for(i=0;i<sendLen;i++)writeMFRC522(FIFODataReg,sendData);writeMFRC522(CommandReg,command);if(command==PCD_TRANSCEIVE) //Stard=1,transmissionofdatai2000i根据时钟频率调整，操作M125ms{//Set1TxIRqRxIRqIdleIRqHiAlerIRqLoAlertIRqErrIRqTimerIRqn=readMFRC522(CommIrqReg);}while((i!=0)&&!(n&0x01)&&!(n&waitIRq));clearBitMask(BitFramingReg,0x80); if(i!={if(!(readMFRC522(ErrorReg)&0x1B))//BufferOvflCollerrCRCErr{status=if(n&irqEn&status= if(command=={n=lastBits=readMFRC522(ControlReg)&0x07;if(lastBits)*backLen=(n-1)*8+lastBits;*backLen=if(n==0)n=1;if(n>MAX_LEN)n=MAX_LEN;//FIFO中接收到的数for(i=0;i<n;backData=}}status=} //timerreturn}发送一个寻卡命令，由于RC522要做收发命令，所以需要写BitFragmingReg寄存器Stardflag.因为找不到比较好的M1卡手册，有些命令我也不知道什么意思，暂且先放FIFO缓存空间4tureboolunsignedcharstatus;unsignedcharstr[MAX_LEN];//4serNumstatus=anticoll(str);if(status==MI_OK)returntrue;return}unsignedcharRFID::anticoll(unsignedchar{unsignedcharstatus;unsignedchari;unsignedcharserNumCheck=0;unsignedintunLen; writeMFRC522(BitFramingReg,0x00); //TxLastBists=BitFramingReg[2..0]serNum[0PICC_ANTI