RFID-RC522 与Arduino的连接

一、前几天在某宝上刚买了个RFID-RC522  ，目标是复制我的门禁卡（看样子没多大希望了）。
二、各种百度各种谷歌都没找到与Arduino的连接方式。

so，分享下我的连接方式，与大家共同进步。。。。

材料：
1、Arduino Uno R3
2、RFID-RC522
3、连接线7根



最下面一根红色为3.3v的电源。
最上面的为SDA，其它照图连接就可以了。

#include <SPI.h> #define uchar unsigned char#define uint unsigned int //data array maxium length#define MAX_LEN 16 ///////////////////////////////////////////////////////////////////////set the pin/////////////////////////////////////////////////////////////////////const int chipSelectPin = 10;const int NRSTPD = 5;   //MF522 command bits#define PCD_IDLE 0x00 //NO action; cancel current commands#define PCD_AUTHENT 0x0E //verify password key#define PCD_RECEIVE 0x08 //receive data#define PCD_TRANSMIT 0x04 //send data#define PCD_TRANSCEIVE 0x0C //send and receive data#define PCD_RESETPHASE 0x0F //reset#define PCD_CALCCRC 0x03 //CRC check and caculation //Mifare_One card command bits#define PICC_REQIDL 0x26 //Search the cards that not into sleep mode in the antenna area #define PICC_REQALL 0x52 //Search all the cards in the antenna area#define PICC_ANTICOLL 0x93 //prevent conflict#define PICC_SElECTTAG 0x93 //select card#define PICC_AUTHENT1A 0x60 //verify A password key#define PICC_AUTHENT1B 0x61 //verify B password key#define PICC_READ 0x30 //read #define PICC_WRITE 0xA0 //write#define PICC_DECREMENT 0xC0 //deduct value#define PICC_INCREMENT 0xC1 //charge up value#define PICC_RESTORE 0xC2 //Restore data into buffer#define PICC_TRANSFER 0xB0 //Save data into buffer#define PICC_HALT 0x50 //sleep mode  //THe mistake code that return when communicate with MF522#define MI_OK 0#define MI_NOTAGERR 1#define MI_ERR 2  //------------------MFRC522 register ---------------//Page 0:Command and Status#define Reserved00 0x00 #define CommandReg 0x01 #define CommIEnReg 0x02 #define DivlEnReg 0x03 #define CommIrqReg 0x04 #define DivIrqReg 0x05#define ErrorReg 0x06 #define Status1Reg 0x07 #define Status2Reg 0x08 #define FIFODataReg 0x09#define FIFOLevelReg 0x0A#define WaterLevelReg 0x0B#define ControlReg 0x0C#define BitFramingReg 0x0D#define CollReg 0x0E#define Reserved01 0x0F//Page 1:Command #define Reserved10 0x10#define ModeReg 0x11#define TxModeReg 0x12#define RxModeReg 0x13#define TxControlReg 0x14#define TxAutoReg 0x15#define TxSelReg 0x16#define RxSelReg 0x17#define RxThresholdReg 0x18#define DemodReg 0x19#define Reserved11 0x1A#define Reserved12 0x1B#define MifareReg 0x1C#define Reserved13 0x1D#define Reserved14 0x1E#define SerialSpeedReg 0x1F//Page 2:CFG #define Reserved20 0x20 #define CRCResultRegM 0x21#define CRCResultRegL 0x22#define Reserved21 0x23#define ModWidthReg 0x24#define Reserved22 0x25#define RFCfgReg 0x26#define GsNReg 0x27#define CWGsPReg 0x28#define ModGsPReg 0x29#define TModeReg 0x2A#define TPrescalerReg 0x2B#define TReloadRegH 0x2C#define TReloadRegL 0x2D#define TCounterValueRegH 0x2E#define TCounterValueRegL 0x2F//Page 3:TestRegister #define Reserved30 0x30#define TestSel1Reg 0x31#define TestSel2Reg 0x32#define TestPinEnReg 0x33#define TestPinValueReg 0x34#define TestBusReg 0x35#define AutoTestReg 0x36#define VersionReg 0x37#define AnalogTestReg 0x38#define TestDAC1Reg 0x39 #define TestDAC2Reg 0x3A #define TestADCReg 0x3B #define Reserved31 0x3C #define Reserved32 0x3D #define Reserved33 0x3E #define Reserved34 0x3F//----------------------------------------------- //4 bytes Serial number of card, the 5 bytes is verfiy bytesuchar serNum[5];  void setup() {     Serial.begin(9600);          SPI.begin();         pinMode(chipSelectPin,OUTPUT); // Set digital pin 10 as OUTPUT to connect it to the RFID /ENABLE pin     digitalWrite(chipSelectPin, LOW); // Activate the RFID reader    pinMode(NRSTPD,OUTPUT); // Set digital pin 5 , Not Reset and Power-down         MFRC522_Init(); }  void loop(){     uchar status;    uchar str[MAX_LEN];          // Search card, return card types    status = MFRC522_Request(PICC_REQIDL, str);     if (status != MI_OK)    {        return;    }              // Show card type    ShowCardType(str);         //Prevent conflict, return the 4 bytes Serial number of the card    status = MFRC522_Anticoll(str);         // str[0..3]: serial number of the card    // str[4]: XOR checksum of the SN.    if (status == MI_OK)    {        Serial.print("The card's number is: ");        memcpy(serNum, str, 5);        ShowCardID(serNum);             // Check people associated with card ID        uchar* id = serNum;        if( id[0]==0x4B && id[1]==0xE6 && id[2]==0xD1 && id[3]==0x3B ) {            Serial.println("Hello Mary!");        } else if(id[0]==0x3B && id[1]==0xE6 && id[2]==0xD1 && id[3]==0x3B) {            Serial.println("Hello Greg!");        }else{            Serial.println("Hello unkown guy!");        }    }         MFRC522_Halt(); //command the card into sleep mode      delay(200);} /* * Function：ShowCardID * Description：Show Card ID * Input parameter：ID string * Return：Null */void ShowCardID(uchar *id){    int IDlen=4;    for(int i=0; i<IDlen; i++){        Serial.print(0x0F & (id[i]>>4), HEX);        Serial.print(0x0F & id[i],HEX);    }    Serial.println("");} /* * Function：ShowCardType * Description：Show Card type * Input parameter：Type string * Return：Null */void ShowCardType(uchar* type){    Serial.print("Card type: ");    if(type[0]==0x04&&type[1]==0x00)         Serial.println("MFOne-S50");    else if(type[0]==0x02&&type[1]==0x00)        Serial.println("MFOne-S70");    else if(type[0]==0x44&&type[1]==0x00)        Serial.println("MF-UltraLight");    else if(type[0]==0x08&&type[1]==0x00)        Serial.println("MF-Pro");    else if(type[0]==0x44&&type[1]==0x03)        Serial.println("MF Desire");    else        Serial.println("Unknown");} /* * Function：Write_MFRC5200 * Description：write a byte data into one register of MR RC522 * Input parameter：addr--register address；val--the value that need to write in * Return：Null */void Write_MFRC522(uchar addr, uchar val){    digitalWrite(chipSelectPin, LOW);     //address format：0XXXXXX0    SPI.transfer((addr<<1)&0x7E);     SPI.transfer(val);         digitalWrite(chipSelectPin, HIGH);}  /* * Function：Read_MFRC522 * Description：read a byte data into one register of MR RC522 * Input parameter：addr--register address * Return：return the read value */uchar Read_MFRC522(uchar addr){    uchar val;     digitalWrite(chipSelectPin, LOW);     //address format：1XXXXXX0    SPI.transfer(((addr<<1)&0x7E) | 0x80);     val =SPI.transfer(0x00);         digitalWrite(chipSelectPin, HIGH);         return val; } /* * Function：SetBitMask * Description：set RC522 register bit * Input parameter：reg--register address;mask--value * Return：null */void SetBitMask(uchar reg, uchar mask) {    uchar tmp;    tmp = Read_MFRC522(reg);    Write_MFRC522(reg, tmp | mask); // set bit mask}  /* * Function：ClearBitMask * Description：clear RC522 register bit * Input parameter：reg--register address;mask--value * Return：null */void ClearBitMask(uchar reg, uchar mask) {    uchar tmp;    tmp = Read_MFRC522(reg);    Write_MFRC522(reg, tmp & (~mask)); // clear bit mask}   /* * Function：AntennaOn * Description：Turn on antenna, every time turn on or shut down antenna need at least 1ms delay * Input parameter：null * Return：null */void AntennaOn(void){    uchar temp;     temp = Read_MFRC522(TxControlReg);    if (!(temp & 0x03))    {        SetBitMask(TxControlReg, 0x03);    }}  /* * Function：AntennaOff * Description：Turn off antenna, every time turn on or shut down antenna need at least 1ms delay * Input parameter：null * Return：null */void AntennaOff(void){    ClearBitMask(TxControlReg, 0x03);}  /* * Function：ResetMFRC522 * Description： reset RC522 * Input parameter：null * Return：null */void MFRC522_Reset(void){    Write_MFRC522(CommandReg, PCD_RESETPHASE);}  /* * Function：InitMFRC522 * Description：initilize RC522 * Input parameter：null * Return：null */void MFRC522_Init(void){    digitalWrite(NRSTPD,HIGH);     MFRC522_Reset();              //Timer: TPrescaler*TreloadVal/6.78MHz = 24ms    Write_MFRC522(TModeReg, 0x8D); //Tauto=1; f(Timer) = 6.78MHz/TPreScaler    Write_MFRC522(TPrescalerReg, 0x3E); //TModeReg[3..0] + TPrescalerReg    Write_MFRC522(TReloadRegL, 30);     Write_MFRC522(TReloadRegH, 0);         Write_MFRC522(TxAutoReg, 0x40); //100%ASK    Write_MFRC522(ModeReg, 0x3D); //CRC initilizate value 0x6363 ???     //ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0    //Write_MFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]    //Write_MFRC522(RFCfgReg, 0x7F); //RxGain = 48dB     AntennaOn(); //turn on antenna}  /* * Function：MFRC522_Request * Description：Searching card, read card type * Input parameter：reqMode--search methods， * TagType--return card types * 0x4400 = Mifare_UltraLight * 0x0400 = Mifare_One(S50) * 0x0200 = Mifare_One(S70) * 0x0800 = Mifare_Pro(X) * 0x4403 = Mifare_DESFire * return：return MI_OK if successed */uchar MFRC522_Request(uchar reqMode, uchar *TagType){    uchar status;     uint backBits; //the data bits that received     Write_MFRC522(BitFramingReg, 0x07); //TxLastBists = BitFramingReg[2..0] ???         TagType[0] = reqMode;    status = MFRC522_ToCard(PCD_TRANSCEIVE, TagType, 1, TagType, &backBits);     if ((status != MI_OK) || (backBits != 0x10))    {         status = MI_ERR;    }        return status;}  /* * Function：MFRC522_ToCard * Description：communicate between RC522 and ISO14443 * Input parameter：command--MF522 command bits * sendData--send data to card via rc522 * sendLen--send data length  * backData--the return data from card * backLen--the length of return data * return：return MI_OK if successed */uchar MFRC522_ToCard(uchar command, uchar *sendData, uchar sendLen, uchar *backData, uint *backLen){    uchar status = MI_ERR;    uchar irqEn = 0x00;    uchar waitIRq = 0x00;    uchar lastBits;    uchar n;    uint i;     switch (command)    {        case PCD_AUTHENT: //verify card password        {            irqEn = 0x12;            waitIRq = 0x10;            break;        }        case PCD_TRANSCEIVE: //send data in the FIFO        {            irqEn = 0x77;            waitIRq = 0x30;            break;        }        default:            break;    }        Write_MFRC522(CommIEnReg, irqEn|0x80); //Allow interruption    ClearBitMask(CommIrqReg, 0x80); //Clear all the interrupt bits    SetBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO initilizate         Write_MFRC522(CommandReg, PCD_IDLE); //NO action;cancel current command ???     //write data into FIFO    for (i=0; i<sendLen; i++)    {         Write_MFRC522(FIFODataReg, sendData[i]);     }     //procceed it    Write_MFRC522(CommandReg, command);    if (command == PCD_TRANSCEIVE)    {         SetBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts     }          //waite receive data is finished    i = 2000; //i should adjust according the clock, the maxium the waiting time should be 25 ms???    do    {        //CommIrqReg[7..0]        //Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq        n = Read_MFRC522(CommIrqReg);        i--;    }    while ((i!=0) && !(n&0x01) && !(n&waitIRq));     ClearBitMask(BitFramingReg, 0x80); //StartSend=0         if (i != 0)    {         if(!(Read_MFRC522(ErrorReg) & 0x1B)) //BufferOvfl Collerr CRCErr ProtecolErr        {            status = MI_OK;            if (n & irqEn & 0x01)            {                 status = MI_NOTAGERR; //??             }                         if (command == PCD_TRANSCEIVE)            {                n = Read_MFRC522(FIFOLevelReg);                lastBits = Read_MFRC522(ControlReg) & 0x07;                if (lastBits)                {                     *backLen = (n-1)*8 + lastBits;                 }                else                {                     *backLen = n*8;                 }                                 if (n == 0)                {                     n = 1;                 }                if (n > MAX_LEN)                {                     n = MAX_LEN;                 }                                 //read the data from FIFO                for (i=0; i<n; i++)                {                     backData[i] = Read_MFRC522(FIFODataReg);                 }            }        }        else        {             status = MI_ERR;         }             }         //SetBitMask(ControlReg,0x80); //timer stops    //Write_MFRC522(CommandReg, PCD_IDLE);      return status;}  /* * Function：MFRC522_Anticoll * Description：Prevent conflict, read the card serial number  * Input parameter：serNum--return the 4 bytes card serial number, the 5th byte is recheck byte * return：return MI_OK if successed */uchar MFRC522_Anticoll(uchar *serNum){    uchar status;    uchar i;    uchar serNumCheck=0;    uint unLen;         //ClearBitMask(Status2Reg, 0x08); //strSensclear    //ClearBitMask(CollReg,0x80); //ValuesAfterColl    Write_MFRC522(BitFramingReg, 0x00); //TxLastBists = BitFramingReg[2..0]      serNum[0] = PICC_ANTICOLL;    serNum[1] = 0x20;    status = MFRC522_ToCard(PCD_TRANSCEIVE, serNum, 2, serNum, &unLen);     if (status == MI_OK)    {        //Verify card serial number        for (i=0; i<4; i++)        {             serNumCheck ^= serNum[i];        }        if (serNumCheck != serNum[i])        {             status = MI_ERR;         }    }     //SetBitMask(CollReg, 0x80); //ValuesAfterColl=1     return status;}   /* * Function：CalulateCRC * Description：Use MF522 to caculate CRC * Input parameter：pIndata--the CRC data need to be read，len--data length，pOutData-- the caculated result of CRC * return：Null */void CalulateCRC(uchar *pIndata, uchar len, uchar *pOutData){    uchar i, n;     ClearBitMask(DivIrqReg, 0x04); //CRCIrq = 0    SetBitMask(FIFOLevelReg, 0x80); //Clear FIFO pointer    //Write_MFRC522(CommandReg, PCD_IDLE);     //Write data into FIFO     for (i=0; i<len; i++)    {         Write_MFRC522(FIFODataReg, *(pIndata+i));     }    Write_MFRC522(CommandReg, PCD_CALCCRC);     //waite CRC caculation to finish    i = 0xFF;    do    {        n = Read_MFRC522(DivIrqReg);        i--;    }    while ((i!=0) && !(n&0x04)); //CRCIrq = 1     //read CRC caculation result    pOutData[0] = Read_MFRC522(CRCResultRegL);    pOutData[1] = Read_MFRC522(CRCResultRegM);}   /* * Function：MFRC522_Write * Description：write block data * Input parameters：blockAddr--block address;writeData--Write 16 bytes data into block * return：return MI_OK if successed */uchar MFRC522_Write(uchar blockAddr, uchar *writeData){    uchar status;    uint recvBits;    uchar i;    uchar buff[18];          buff[0] = PICC_WRITE;    buff[1] = blockAddr;    CalulateCRC(buff, 2, &buff[2]);    status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 4, buff, &recvBits);     if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))    {         status = MI_ERR;     }             if (status == MI_OK)    {        for (i=0; i<16; i++) //Write 16 bytes data into FIFO        {             buff[i] = *(writeData+i);         }        CalulateCRC(buff, 16, &buff[16]);        status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 18, buff, &recvBits);                 if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))        {             status = MI_ERR;         }    }         return status;}  /* * Function：MFRC522_Halt * Description：Command the cards into sleep mode * Input parameters：null * return：null */void MFRC522_Halt(void){    uchar status;    uint unLen;    uchar buff[4];      buff[0] = PICC_HALT;    buff[1] = 0;    CalulateCRC(buff, 2, &buff[2]);      status = MFRC522_ToCard(PCD_TRANSCEIVE, buff, 4, buff,&unLen);}