9151cbf25c
If we do not turn off encryption after the tag has been halted we will not be able to read a second tag.
488 lines
12 KiB
C++
488 lines
12 KiB
C++
/*
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* RFID.cpp - Library to use ARDUINO RFID MODULE KIT 13.56 MHZ WITH TAGS SPI W AND R BY COOQROBOT.
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* Based on code Dr.Leong ( WWW.B2CQSHOP.COM )
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* Created by Miguel Balboa, Jan, 2012.
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* Released into the public domain.
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*/
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/******************************************************************************
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* Includes
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******************************************************************************/
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#include <Arduino.h>
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#include <RFID.h>
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/******************************************************************************
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* User API
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******************************************************************************/
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/**
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* Construct RFID
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* int chipSelectPin RFID /ENABLE pin
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*/
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RFID::RFID(int chipSelectPin, int NRSTPD)
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{
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_chipSelectPin = chipSelectPin;
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pinMode(_chipSelectPin,OUTPUT); // Set digital as OUTPUT to connect it to the RFID /ENABLE pin
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digitalWrite(_chipSelectPin, LOW);
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pinMode(NRSTPD,OUTPUT); // Set digital pin, Not Reset and Power-down
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digitalWrite(NRSTPD, HIGH);
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_NRSTPD = NRSTPD;
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}
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/******************************************************************************
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* User API
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******************************************************************************/
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bool RFID::isCard()
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{
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unsigned char status;
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unsigned char str[MAX_LEN];
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status = MFRC522Request(PICC_REQIDL, str);
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if (status == MI_OK) {
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return true;
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} else {
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return false;
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}
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}
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bool RFID::readCardSerial(){
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unsigned char status;
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unsigned char str[MAX_LEN];
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// Anti-colisión, devuelva el número de serie de tarjeta de 4 bytes
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status = anticoll(str);
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memcpy(serNum, str, 5);
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if (status == MI_OK) {
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return true;
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} else {
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return false;
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}
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}
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/******************************************************************************
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* Dr.Leong ( WWW.B2CQSHOP.COM )
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******************************************************************************/
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void RFID::init()
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{
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digitalWrite(_NRSTPD,HIGH);
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reset();
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//Timer: TPrescaler*TreloadVal/6.78MHz = 24ms
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writeMFRC522(TModeReg, 0x8D); //Tauto=1; f(Timer) = 6.78MHz/TPreScaler
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writeMFRC522(TPrescalerReg, 0x3E); //TModeReg[3..0] + TPrescalerReg
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writeMFRC522(TReloadRegL, 30);
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writeMFRC522(TReloadRegH, 0);
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writeMFRC522(TxAutoReg, 0x40); //100%ASK
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writeMFRC522(ModeReg, 0x3D); // CRC valor inicial de 0x6363
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//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
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//writeMFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]
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//writeMFRC522(RFCfgReg, 0x7F); //RxGain = 48dB
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antennaOn(); //Abre la antena
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}
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void RFID::reset()
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{
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writeMFRC522(CommandReg, PCD_RESETPHASE);
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}
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void RFID::writeMFRC522(unsigned char addr, unsigned char val)
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{
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digitalWrite(_chipSelectPin, LOW);
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//0XXXXXX0 formato de dirección
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SPI.transfer((addr<<1)&0x7E);
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SPI.transfer(val);
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digitalWrite(_chipSelectPin, HIGH);
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}
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void RFID::antennaOn(void)
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{
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unsigned char temp;
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temp = readMFRC522(TxControlReg);
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if (!(temp & 0x03))
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{
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setBitMask(TxControlReg, 0x03);
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}
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}
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/*
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* Read_MFRC522 Nombre de la función: Read_MFRC522
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* Descripción: Desde el MFRC522 leer un byte de un registro de datos
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* Los parámetros de entrada: addr - la dirección de registro
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* Valor de retorno: Devuelve un byte de datos de lectura
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*/
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unsigned char RFID::readMFRC522(unsigned char addr)
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{
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unsigned char val;
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digitalWrite(_chipSelectPin, LOW);
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SPI.transfer(((addr<<1)&0x7E) | 0x80);
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val =SPI.transfer(0x00);
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digitalWrite(_chipSelectPin, HIGH);
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return val;
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}
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void RFID::setBitMask(unsigned char reg, unsigned char mask)
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{
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unsigned char tmp;
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tmp = readMFRC522(reg);
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writeMFRC522(reg, tmp | mask); // set bit mask
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}
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void RFID::clearBitMask(unsigned char reg, unsigned char mask)
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{
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unsigned char tmp;
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tmp = readMFRC522(reg);
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writeMFRC522(reg, tmp & (~mask)); // clear bit mask
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}
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void RFID::calculateCRC(unsigned char *pIndata, unsigned char len, unsigned char *pOutData)
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{
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unsigned char i, n;
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clearBitMask(DivIrqReg, 0x04); //CRCIrq = 0
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setBitMask(FIFOLevelReg, 0x80); //Claro puntero FIFO
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//Write_MFRC522(CommandReg, PCD_IDLE);
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//Escribir datos en el FIFO
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for (i=0; i<len; i++)
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{
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writeMFRC522(FIFODataReg, *(pIndata+i));
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}
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writeMFRC522(CommandReg, PCD_CALCCRC);
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// Esperar a la finalización de cálculo del CRC
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i = 0xFF;
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do
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{
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n = readMFRC522(DivIrqReg);
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i--;
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}
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while ((i!=0) && !(n&0x04)); //CRCIrq = 1
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//Lea el cálculo de CRC
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pOutData[0] = readMFRC522(CRCResultRegL);
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pOutData[1] = readMFRC522(CRCResultRegM);
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}
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unsigned char RFID::MFRC522ToCard(unsigned char command, unsigned char *sendData, unsigned char sendLen, unsigned char *backData, unsigned int *backLen)
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{
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unsigned char status = MI_ERR;
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unsigned char irqEn = 0x00;
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unsigned char waitIRq = 0x00;
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unsigned char lastBits;
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unsigned char n;
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unsigned int i;
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switch (command)
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{
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case PCD_AUTHENT: // Tarjetas de certificación cerca
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{
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irqEn = 0x12;
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waitIRq = 0x10;
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break;
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}
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case PCD_TRANSCEIVE: //La transmisión de datos FIFO
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{
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irqEn = 0x77;
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waitIRq = 0x30;
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break;
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}
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default:
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break;
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}
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writeMFRC522(CommIEnReg, irqEn|0x80); //De solicitud de interrupción
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clearBitMask(CommIrqReg, 0x80); // Borrar todos los bits de petición de interrupción
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setBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO de inicialización
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writeMFRC522(CommandReg, PCD_IDLE); //NO action;Y cancelar el comando
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//Escribir datos en el FIFO
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for (i=0; i<sendLen; i++)
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{
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writeMFRC522(FIFODataReg, sendData[i]);
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}
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//???? ejecutar el comando
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writeMFRC522(CommandReg, command);
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if (command == PCD_TRANSCEIVE)
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{
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setBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
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}
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// A la espera de recibir datos para completar
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i = 2000; //i????????,??M1???????25ms ??? i De acuerdo con el ajuste de frecuencia de reloj, el tiempo máximo de espera operación M1 25ms tarjeta??
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do
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{
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//CommIrqReg[7..0]
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//Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq
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n = readMFRC522(CommIrqReg);
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i--;
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}
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while ((i!=0) && !(n&0x01) && !(n&waitIRq));
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clearBitMask(BitFramingReg, 0x80); //StartSend=0
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if (i != 0)
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{
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if(!(readMFRC522(ErrorReg) & 0x1B)) //BufferOvfl Collerr CRCErr ProtecolErr
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{
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status = MI_OK;
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if (n & irqEn & 0x01)
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{
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status = MI_NOTAGERR; //??
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}
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if (command == PCD_TRANSCEIVE)
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{
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n = readMFRC522(FIFOLevelReg);
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lastBits = readMFRC522(ControlReg) & 0x07;
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if (lastBits)
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{
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*backLen = (n-1)*8 + lastBits;
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}
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else
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{
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*backLen = n*8;
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}
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if (n == 0)
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{
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n = 1;
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}
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if (n > MAX_LEN)
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{
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n = MAX_LEN;
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}
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//??FIFO??????? Lea los datos recibidos en el FIFO
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for (i=0; i<n; i++)
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{
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backData[i] = readMFRC522(FIFODataReg);
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}
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}
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}
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else
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{
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status = MI_ERR;
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}
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}
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//SetBitMask(ControlReg,0x80); //timer stops
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//Write_MFRC522(CommandReg, PCD_IDLE);
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return status;
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}
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/*
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* Nombre de la función: MFRC522_Request
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* Descripción: Buscar las cartas, leer el número de tipo de tarjeta
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* Los parámetros de entrada: reqMode - encontrar el modo de tarjeta,
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* Tagtype - Devuelve el tipo de tarjeta
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* 0x4400 = Mifare_UltraLight
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* 0x0400 = Mifare_One(S50)
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* 0x0200 = Mifare_One(S70)
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* 0x0800 = Mifare_Pro(X)
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* 0x4403 = Mifare_DESFire
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* Valor de retorno: el retorno exitoso MI_OK
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*/
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unsigned char RFID::MFRC522Request(unsigned char reqMode, unsigned char *TagType)
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{
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unsigned char status;
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unsigned int backBits; // Recibió bits de datos
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writeMFRC522(BitFramingReg, 0x07); //TxLastBists = BitFramingReg[2..0] ???
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TagType[0] = reqMode;
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status = MFRC522ToCard(PCD_TRANSCEIVE, TagType, 1, TagType, &backBits);
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if ((status != MI_OK) || (backBits != 0x10))
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{
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status = MI_ERR;
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}
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return status;
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}
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/**
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* MFRC522Anticoll -> anticoll
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* Anti-detección de colisiones, la lectura del número de serie de la tarjeta de tarjeta
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* @param serNum - devuelve el número de tarjeta 4 bytes de serie, los primeros 5 bytes de bytes de paridad
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* @return retorno exitoso MI_OK
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*/
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unsigned char RFID::anticoll(unsigned char *serNum)
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{
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unsigned char status;
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unsigned char i;
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unsigned char serNumCheck=0;
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unsigned int unLen;
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//ClearBitMask(Status2Reg, 0x08); //TempSensclear
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//ClearBitMask(CollReg,0x80); //ValuesAfterColl
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writeMFRC522(BitFramingReg, 0x00); //TxLastBists = BitFramingReg[2..0]
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serNum[0] = PICC_ANTICOLL;
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serNum[1] = 0x20;
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status = MFRC522ToCard(PCD_TRANSCEIVE, serNum, 2, serNum, &unLen);
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if (status == MI_OK)
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{
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//?????? Compruebe el número de serie de la tarjeta
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for (i=0; i<4; i++)
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{
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serNumCheck ^= serNum[i];
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}
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if (serNumCheck != serNum[i])
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{
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status = MI_ERR;
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}
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}
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//SetBitMask(CollReg, 0x80); //ValuesAfterColl=1
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return status;
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}
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/*
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* MFRC522Auth -> auth
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* Verificar la contraseña de la tarjeta
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* Los parámetros de entrada: AuthMode - Modo de autenticación de contraseña
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0x60 = A 0x60 = validación KeyA
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0x61 = B 0x61 = validación KeyB
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BlockAddr-- bloque de direcciones
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Sectorkey-- sector contraseña
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serNum--,4? Tarjeta de número de serie, 4 bytes
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* MI_OK Valor de retorno: el retorno exitoso MI_OK
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*/
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unsigned char RFID::auth(unsigned char authMode, unsigned char BlockAddr, unsigned char *Sectorkey, unsigned char *serNum)
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{
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unsigned char status;
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unsigned int recvBits;
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unsigned char i;
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unsigned char buff[12];
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//????+???+????+???? Verifique la dirección de comandos de bloques del sector + + contraseña + número de la tarjeta de serie
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buff[0] = authMode;
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buff[1] = BlockAddr;
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for (i=0; i<6; i++)
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{
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buff[i+2] = *(Sectorkey+i);
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}
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for (i=0; i<4; i++)
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{
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buff[i+8] = *(serNum+i);
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}
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status = MFRC522ToCard(PCD_AUTHENT, buff, 12, buff, &recvBits);
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if ((status != MI_OK) || (!(readMFRC522(Status2Reg) & 0x08)))
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{
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status = MI_ERR;
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}
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return status;
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}
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/*
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* MFRC522Read -> read
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* Lectura de datos de bloque
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* Los parámetros de entrada: blockAddr - dirección del bloque; recvData - leer un bloque de datos
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* MI_OK Valor de retorno: el retorno exitoso MI_OK
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*/
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unsigned char RFID::read(unsigned char blockAddr, unsigned char *recvData)
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{
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unsigned char status;
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unsigned int unLen;
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recvData[0] = PICC_READ;
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recvData[1] = blockAddr;
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calculateCRC(recvData,2, &recvData[2]);
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status = MFRC522ToCard(PCD_TRANSCEIVE, recvData, 4, recvData, &unLen);
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if ((status != MI_OK) || (unLen != 0x90))
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{
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status = MI_ERR;
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}
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return status;
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}
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/*
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* MFRC522Write -> write
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* La escritura de datos de bloque
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* blockAddr - dirección del bloque; WriteData - para escribir 16 bytes del bloque de datos
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* Valor de retorno: el retorno exitoso MI_OK
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*/
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unsigned char RFID::write(unsigned char blockAddr, unsigned char *writeData)
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{
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unsigned char status;
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unsigned int recvBits;
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unsigned char i;
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unsigned char buff[18];
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buff[0] = PICC_WRITE;
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buff[1] = blockAddr;
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calculateCRC(buff, 2, &buff[2]);
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status = MFRC522ToCard(PCD_TRANSCEIVE, buff, 4, buff, &recvBits);
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if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))
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{
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status = MI_ERR;
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}
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if (status == MI_OK)
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{
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for (i=0; i<16; i++) //?FIFO?16Byte?? Datos a la FIFO 16Byte escribir
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{
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buff[i] = *(writeData+i);
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}
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calculateCRC(buff, 16, &buff[16]);
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status = MFRC522ToCard(PCD_TRANSCEIVE, buff, 18, buff, &recvBits);
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if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))
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{
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status = MI_ERR;
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}
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}
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return status;
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}
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/*
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* MFRC522Halt -> halt
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* Cartas de Mando para dormir
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* Los parámetros de entrada: Ninguno
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* Valor devuelto: Ninguno
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*/
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void RFID::halt()
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{
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unsigned char status;
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unsigned int unLen;
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unsigned char buff[4];
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buff[0] = PICC_HALT;
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buff[1] = 0;
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calculateCRC(buff, 2, &buff[2]);
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clearBitMask(Status2Reg, 0x08); // turn off encryption
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status = MFRC522ToCard(PCD_TRANSCEIVE, buff, 4, buff,&unLen);
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}
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