ARDUINO RFID CODE!!!!!!!

 Hey Guy today i gonna show you my arduino RFID Interface and you can make it by your self and i used this code is for sensor the card number and security card true or false ,etc...
code:
 // the sensor communicates using SPI, so include the library:
#include <SPI.h>

#define uchar unsigned char
#define uint unsigned int


#define MAX_LEN 16

/////////////////////////////////////////////////////////////////////
//set the pin
/////////////////////////////////////////////////////////////////////
const int chipSelectPin = 10;//UNO,328,168
const int chipSelectPin = 53; //mega 2560,1280
const int NRSTPD = 5;
#define PCD_IDLE              0x00              
#define PCD_AUTHENT           0x0E              
#define PCD_RECEIVE           0x08            
#define PCD_TRANSMIT          0x04              
#define PCD_TRANSCEIVE        0x0C            
#define PCD_RESETPHASE        0x0F              
#define PCD_CALCCRC           0x03              

//Mifare_One卡片命令字
#define PICC_REQIDL           0x26              
#define PICC_REQALL           0x52              
#define PICC_ANTICOLL         0x93              
#define PICC_SElECTTAG        0x93              
#define PICC_AUTHENT1A        0x60              
#define PICC_AUTHENT1B        0x61              
#define PICC_READ             0x30              
#define PICC_WRITE            0xA0            
#define PICC_DECREMENT        0xC0              
#define PICC_INCREMENT        0xC1              
#define PICC_RESTORE          0xC2              
#define PICC_TRANSFER         0xB0              
#define PICC_HALT             0x50              



#define MI_OK                 0
#define MI_NOTAGERR           1
#define MI_ERR                2



//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
//-----------------------------------------------


uchar serNum[5];
uchar  writeDate[16] ={'T', 'e', 'n', 'g', ' ', 'B', 'o', 0, 0, 0, 0, 0, 0, 0, 0,0};

 uchar sectorKeyA[16][16] = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
                             {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
                             {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
                            };
 uchar sectorNewKeyA[16][16] = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
                                {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
                                {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
                               };

void setup() {              
   Serial.begin(9600);                       // RFID reader SOUT pin connected to Serial RX pin at 2400bps
 // start the SPI library:
  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 10 , Not Reset and Power-down
    digitalWrite(NRSTPD, HIGH);

  MFRC522_Init();
}

void loop()
{
  uchar i,tmp;
uchar status;
        uchar str[MAX_LEN];
        uchar RC_size;
        uchar blockAddr;
status = MFRC522_Request(PICC_REQIDL, str);
if (status == MI_OK)
{
}
status = MFRC522_Anticoll(str);
memcpy(serNum, str, 5);
if (status == MI_OK)
{
                        Serial.println("The card's number is  : ");
Serial.print(serNum[0],BIN);
Serial.print(serNum[1],BIN);
Serial.print(serNum[2],BIN);
Serial.print(serNum[3],BIN);
Serial.print(serNum[4],BIN);
                        Serial.println(" ");
}


RC_size = MFRC522_SelectTag(serNum);
if (RC_size != 0)
{}
               

blockAddr = 7;
status = MFRC522_Auth(PICC_AUTHENT1A, blockAddr, sectorKeyA[blockAddr/4], serNum);
if (status == MI_OK)
{

status = MFRC522_Write(blockAddr, sectorNewKeyA[blockAddr/4]);
                        Serial.print("set the new card password, and can modify the data of the Sector: ");
                        Serial.print(blockAddr/4,DEC);
 
                       
                        blockAddr = blockAddr - 3 ;
                        status = MFRC522_Write(blockAddr, writeDate);
                        if(status == MI_OK)
                        {
                           Serial.println("OK!");
                        }
}


blockAddr = 7;
status = MFRC522_Auth(PICC_AUTHENT1A, blockAddr, sectorNewKeyA[blockAddr/4], serNum);
if (status == MI_OK)
{

                        blockAddr = blockAddr - 3 ;
                        status = MFRC522_Read(blockAddr, str);
if (status == MI_OK)
{
                                Serial.println("Read from the card ,the data is : ");
for (i=0; i<16; i++)
{
                   Serial.print(str[i]);
}
                                Serial.println(" ");
}
}
                Serial.println(" ");
MFRC522_Halt();        
         
}
void Write_MFRC522(uchar addr, uchar val)
{
digitalWrite(chipSelectPin, LOW);

SPI.transfer((addr<<1)&0x7E);
SPI.transfer(val);

digitalWrite(chipSelectPin, HIGH);
}
uchar Read_MFRC522(uchar addr)
{
uchar val;

digitalWrite(chipSelectPin, LOW);

//地址格式：1XXXXXX0
SPI.transfer(((addr<<1)&0x7E) | 0x80);
val =SPI.transfer(0x00);

digitalWrite(chipSelectPin, HIGH);

return val;
}

void SetBitMask(uchar reg, uchar mask)
{
    uchar tmp;
    tmp = Read_MFRC522(reg);
    Write_MFRC522(reg, tmp | mask);  // set bit mask
}
void ClearBitMask(uchar reg, uchar mask)
{
    uchar tmp;
    tmp = Read_MFRC522(reg);
    Write_MFRC522(reg, tmp & (~mask));  // clear bit mask
}



void AntennaOn(void)
{
uchar temp;

temp = Read_MFRC522(TxControlReg);
if (!(temp & 0x03))
{
SetBitMask(TxControlReg, 0x03);
}
}




void AntennaOff(void)
{
ClearBitMask(TxControlReg, 0x03);
}



void MFRC522_Reset(void)
{
    Write_MFRC522(CommandReg, PCD_RESETPHASE);
}



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);

//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
//Write_MFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]
//Write_MFRC522(RFCfgReg, 0x7F);   //RxGain = 48dB

AntennaOn();
}



uchar MFRC522_Request(uchar reqMode, uchar *TagType)
{
uchar status;
uint backBits;

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;
}



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:
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE:
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
    }
 
    Write_MFRC522(CommIEnReg, irqEn|0x80);
    ClearBitMask(CommIrqReg, 0x80);
    SetBitMask(FIFOLevelReg, 0x80);
   
Write_MFRC522(CommandReg, PCD_IDLE);


    for (i=0; i<sendLen; i++)
    {  
Write_MFRC522(FIFODataReg, sendData[i]);  
}


Write_MFRC522(CommandReg, command);
    if (command == PCD_TRANSCEIVE)
    {  
SetBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
}  
   

i = 2000;
    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;  
}


                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;
}



uchar MFRC522_Anticoll(uchar *serNum)
{
    uchar status;
    uchar i;
uchar serNumCheck=0;
    uint unLen;
   

    //ClearBitMask(Status2Reg, 0x08); //TempSensclear
    //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)
{

for (i=0; i<4; i++)
{  
serNumCheck ^= serNum[i];
}
if (serNumCheck != serNum[i])
{  
status = MI_ERR;  
}
    }

    //SetBitMask(CollReg, 0x80); //ValuesAfterColl=1

    return status;
}


void CalulateCRC(uchar *pIndata, uchar len, uchar *pOutData)
{
    uchar i, n;

    ClearBitMask(DivIrqReg, 0x04); //CRCIrq = 0
    SetBitMask(FIFOLevelReg, 0x80);
    //Write_MFRC522(CommandReg, PCD_IDLE);


    for (i=0; i<len; i++)
    {  
Write_MFRC522(FIFODataReg, *(pIndata+i));  
}
    Write_MFRC522(CommandReg, PCD_CALCCRC);


    i = 0xFF;
    do
    {
        n = Read_MFRC522(DivIrqReg);
        i--;
    }
    while ((i!=0) && !(n&0x04)); //CRCIrq = 1


    pOutData[0] = Read_MFRC522(CRCResultRegL);
    pOutData[1] = Read_MFRC522(CRCResultRegM);
}

uchar MFRC522_SelectTag(uchar *serNum)
{
    uchar i;
uchar status;
uchar size;
    uint recvBits;
    uchar buffer[9];

//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0

    buffer[0] = PICC_SElECTTAG;
    buffer[1] = 0x70;
    for (i=0; i<5; i++)
    {
    buffer[i+2] = *(serNum+i);
    }
CalulateCRC(buffer, 7, &buffer[7]); //??
    status = MFRC522_ToCard(PCD_TRANSCEIVE, buffer, 9, buffer, &recvBits);
   
    if ((status == MI_OK) && (recvBits == 0x18))
    {  
size = buffer[0];
}
    else
    {  
size = 0;  
}

    return size;
}



uchar MFRC522_Auth(uchar authMode, uchar BlockAddr, uchar *Sectorkey, uchar *serNum)
{
    uchar status;
    uint recvBits;
    uchar i;
uchar buff[12];

    buff[0] = authMode;
    buff[1] = BlockAddr;
    for (i=0; i<6; i++)
    {  
buff[i+2] = *(Sectorkey+i);  
}
    for (i=0; i<4; i++)
    {  
buff[i+8] = *(serNum+i);  
}
    status = MFRC522_ToCard(PCD_AUTHENT, buff, 12, buff, &recvBits);

    if ((status != MI_OK) || (!(Read_MFRC522(Status2Reg) & 0x08)))
    {  
status = MI_ERR;  
}
   
    return status;
}



uchar MFRC522_Read(uchar blockAddr, uchar *recvData)
{
    uchar status;
    uint unLen;

    recvData[0] = PICC_READ;
    recvData[1] = blockAddr;
    CalulateCRC(recvData,2, &recvData[2]);
    status = MFRC522_ToCard(PCD_TRANSCEIVE, recvData, 4, recvData, &unLen);

    if ((status != MI_OK) || (unLen != 0x90))
    {
        status = MI_ERR;
    }
   
    return status;
}



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++)
        {  
        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;
}



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);
}

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