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February 3, 2014 12:25
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RFID_RC522.ino
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| /* | |
| * Name：RFID.pde | |
| * Create：www.electrodragon.com | |
| * Create date：2011.09.19 | |
| * Function：Mifare1 searching card →prevent conflict→ select card →read write pins | |
| */ | |
| // the sensor communicates using SPI, so include the library: | |
| #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 bytes | |
| uchar serNum[5]; | |
| uchar writeData[16]={0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 100}; //initialize to 100 USD | |
| uchar moneyConsume = 18 ; //Deduct 18 USD | |
| uchar moneyAdd = 10 ; //Charge up 10 USD | |
| //buffer A password, 16 buffer, the passowrd of every buffer is 6 byte | |
| uchar sectorKeyA[16][16] = {{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, | |
| {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, | |
| //{0x19, 0x84, 0x07, 0x15, 0x76, 0x14}, | |
| {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, 0x19,0x84,0x07,0x15,0x76,0x14}, | |
| //you can set another ket , such as " 0x19, 0x84, 0x07, 0x15, 0x76, 0x14 " | |
| //{0x19, 0x84, 0x07, 0x15, 0x76, 0x14, 0xff,0x07,0x80,0x69, 0x19,0x84,0x07,0x15,0x76,0x14}, | |
| // but when loop, please set the sectorKeyA, the same key, so that RFID module can read the card | |
| {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xff,0x07,0x80,0x69, 0x19,0x33,0x07,0x15,0x34,0x14}, | |
| }; | |
| 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; //Select operation buck address 0 - 63 | |
| String mynum = ""; | |
| //Search card, return card types | |
| status = MFRC522_Request(PICC_REQIDL, str); | |
| if (status == MI_OK) | |
| { | |
| Serial.println("Card detected"); | |
| Serial.print(str[0],BIN); | |
| Serial.print(" , "); | |
| Serial.print(str[1],BIN); | |
| Serial.println(" "); | |
| } | |
| //Prevent conflict, return the 4 bytes Serial number of the card | |
| status = MFRC522_Anticoll(str); | |
| memcpy(serNum, str, 5); | |
| if (status == MI_OK) | |
| { | |
| Serial.println("The card's number is : "); | |
| Serial.print(serNum[0]); | |
| Serial.print(" , "); | |
| Serial.print(serNum[1],BIN); | |
| Serial.print(" , "); | |
| Serial.print(serNum[2],BIN); | |
| Serial.print(" , "); | |
| Serial.print(serNum[3],BIN); | |
| Serial.print(" , "); | |
| Serial.print(serNum[4],BIN); | |
| Serial.println(" "); | |
| Serial.println("-----------------------------"); | |
| // Should really check all pairs, but for now we'll just use the first | |
| if(serNum[0] == 29) { | |
| Serial.println("========="); | |
| Serial.println("It's cart"); | |
| Serial.println("========="); | |
| } else if(serNum[0] == 125) { | |
| Serial.println("============="); | |
| Serial.println("It's keychain"); | |
| Serial.println("============="); | |
| } | |
| delay(1000); | |
| } | |
| // Serial.println(" "); | |
| MFRC522_Halt(); //command the card into sleep mode | |
| } | |
| /* | |
| * 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); //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) | |
| { | |
| //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_SelectTag | |
| * Description：Select card, read card storage volume | |
| * Input parameter：serNum--Send card serial number | |
| * return：return the card storage volume | |
| */ | |
| 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; | |
| } | |
| /* | |
| * Function：MFRC522_Auth | |
| * Description：verify card password | |
| * Input parameters：authMode--password verify mode | |
| 0x60 = verify A passowrd key | |
| 0x61 = verify B passowrd key | |
| BlockAddr--Block address | |
| Sectorkey--Block password | |
| serNum--Card serial number ，4 bytes | |
| * return：return MI_OK if successed | |
| */ | |
| uchar MFRC522_Auth(uchar authMode, uchar BlockAddr, uchar *Sectorkey, uchar *serNum) | |
| { | |
| uchar status; | |
| uint recvBits; | |
| uchar i; | |
| uchar buff[12]; | |
| //Verify command + block address + buffer password + card SN | |
| 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; | |
| } | |
| /* | |
| * Function：MFRC522_Read | |
| * Description：Read data | |
| * Input parameters：blockAddr--block address;recvData--the block data which are read | |
| * return：return MI_OK if successed | |
| */ | |
| 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; | |
| } | |
| /* | |
| * 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); | |
| } |
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