libs/RFID.MFRC522
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Miguel Balboa
2012-09-09 15:04:51 -05:00
commit 54e3217261
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RFID.cpp Normal file
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/*
* RFID.cpp - Library to use ARDUINO RFID MODULE KIT 13.56 MHZ WITH TAGS SPI W AND R BY COOQROBOT.
* Based on code Dr.Leong ( WWW.B2CQSHOP.COM )
* Created by Miguel Balboa, Jan, 2012.
* Released into the public domain.
*/
/******************************************************************************
* Includes
******************************************************************************/
#include <Arduino.h>
#include <RFID.h>
/******************************************************************************
* User API
******************************************************************************/
/**
* Construct RFID
* int chipSelectPin RFID /ENABLE pin
*/
RFID::RFID(int chipSelectPin, int NRSTPD)
{
_chipSelectPin = chipSelectPin;
pinMode(_chipSelectPin,OUTPUT); // Set digital as OUTPUT to connect it to the RFID /ENABLE pin
digitalWrite(_chipSelectPin, LOW);
pinMode(NRSTPD,OUTPUT); // Set digital pin, Not Reset and Power-down
digitalWrite(NRSTPD, HIGH);
_NRSTPD = NRSTPD;
}
/******************************************************************************
* User API
******************************************************************************/
bool RFID::isCard()
{
unsigned char status;
unsigned char str[MAX_LEN];
status = MFRC522Request(PICC_REQIDL, str);
if (status == MI_OK) {
return true;
} else {
return false;
}
}
bool RFID::readCardSerial(){
unsigned char status;
unsigned char str[MAX_LEN];
// Anti-colisi<73>n, devuelva el n<>mero de serie de tarjeta de 4 bytes
status = anticoll(str);
memcpy(serNum, str, 5);
if (status == MI_OK) {
return true;
} else {
return false;
}
}
/******************************************************************************
* Dr.Leong ( WWW.B2CQSHOP.COM )
******************************************************************************/
void RFID::init()
{
digitalWrite(_NRSTPD,HIGH);
reset();
//Timer: TPrescaler*TreloadVal/6.78MHz = 24ms
writeMFRC522(TModeReg, 0x8D); //Tauto=1; f(Timer) = 6.78MHz/TPreScaler
writeMFRC522(TPrescalerReg, 0x3E); //TModeReg[3..0] + TPrescalerReg
writeMFRC522(TReloadRegL, 30);
writeMFRC522(TReloadRegH, 0);
writeMFRC522(TxAutoReg, 0x40); //100%ASK
writeMFRC522(ModeReg, 0x3D); // CRC valor inicial de 0x6363
//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
//writeMFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]
//writeMFRC522(RFCfgReg, 0x7F); //RxGain = 48dB
antennaOn(); //Abre la antena
}
void RFID::reset()
{
writeMFRC522(CommandReg, PCD_RESETPHASE);
}
void RFID::writeMFRC522(unsigned char addr, unsigned char val)
{
digitalWrite(_chipSelectPin, LOW);
//0XXXXXX0 formato de direcci<63>n
SPI.transfer((addr<<1)&0x7E);
SPI.transfer(val);
digitalWrite(_chipSelectPin, HIGH);
}
void RFID::antennaOn(void)
{
unsigned char temp;
temp = readMFRC522(TxControlReg);
if (!(temp & 0x03))
{
setBitMask(TxControlReg, 0x03);
}
}
/*
* Read_MFRC522 Nombre de la funci<63>n: Read_MFRC522
* Descripci<63>n: Desde el MFRC522 leer un byte de un registro de datos
* Los par<61>metros de entrada: addr - la direcci<63>n de registro
* Valor de retorno: Devuelve un byte de datos de lectura
*/
unsigned char RFID::readMFRC522(unsigned char addr)
{
unsigned char val;
digitalWrite(_chipSelectPin, LOW);
SPI.transfer(((addr<<1)&0x7E) | 0x80);
val =SPI.transfer(0x00);
digitalWrite(_chipSelectPin, HIGH);
return val;
}
void RFID::setBitMask(unsigned char reg, unsigned char mask)
{
unsigned char tmp;
tmp = readMFRC522(reg);
writeMFRC522(reg, tmp | mask); // set bit mask
}
void RFID::clearBitMask(unsigned char reg, unsigned char mask)
{
unsigned char tmp;
tmp = readMFRC522(reg);
writeMFRC522(reg, tmp & (~mask)); // clear bit mask
}
void RFID::calculateCRC(unsigned char *pIndata, unsigned char len, unsigned char *pOutData)
{
unsigned char i, n;
clearBitMask(DivIrqReg, 0x04); //CRCIrq = 0
setBitMask(FIFOLevelReg, 0x80); //Claro puntero FIFO
//Write_MFRC522(CommandReg, PCD_IDLE);
//Escribir datos en el FIFO
for (i=0; i<len; i++)
{
writeMFRC522(FIFODataReg, *(pIndata+i));
}
writeMFRC522(CommandReg, PCD_CALCCRC);
// Esperar a la finalizaci<63>n de c<>lculo del CRC
i = 0xFF;
do
{
n = readMFRC522(DivIrqReg);
i--;
}
while ((i!=0) && !(n&0x04)); //CRCIrq = 1
//Lea el c<>lculo de CRC
pOutData[0] = readMFRC522(CRCResultRegL);
pOutData[1] = readMFRC522(CRCResultRegM);
}
unsigned char RFID::MFRC522ToCard(unsigned char command, unsigned char *sendData, unsigned char sendLen, unsigned char *backData, unsigned int *backLen)
{
unsigned char status = MI_ERR;
unsigned char irqEn = 0x00;
unsigned char waitIRq = 0x00;
unsigned char lastBits;
unsigned char n;
unsigned int i;
switch (command)
{
case PCD_AUTHENT: // Tarjetas de certificaci<63>n cerca
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE: //La transmisi<73>n de datos FIFO
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
}
writeMFRC522(CommIEnReg, irqEn|0x80); //De solicitud de interrupci<63>n
clearBitMask(CommIrqReg, 0x80); // Borrar todos los bits de petici<63>n de interrupci<63>n
setBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO de inicializaci<63>n
writeMFRC522(CommandReg, PCD_IDLE); //NO action;Y cancelar el comando
//Escribir datos en el FIFO
for (i=0; i<sendLen; i++)
{
writeMFRC522(FIFODataReg, sendData[i]);
}
//???? ejecutar el comando
writeMFRC522(CommandReg, command);
if (command == PCD_TRANSCEIVE)
{
setBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
}
// A la espera de recibir datos para completar
i = 2000; //i????????,??M1???????25ms ??? i De acuerdo con el ajuste de frecuencia de reloj, el tiempo m<>ximo de espera operaci<63>n M1 25ms tarjeta??
do
{
//CommIrqReg[7..0]
//Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq
n = readMFRC522(CommIrqReg);
i--;
}
while ((i!=0) && !(n&0x01) && !(n&waitIRq));
clearBitMask(BitFramingReg, 0x80); //StartSend=0
if (i != 0)
{
if(!(readMFRC522(ErrorReg) & 0x1B)) //BufferOvfl Collerr CRCErr ProtecolErr
{
status = MI_OK;
if (n & irqEn & 0x01)
{
status = MI_NOTAGERR; //??
}
if (command == PCD_TRANSCEIVE)
{
n = readMFRC522(FIFOLevelReg);
lastBits = readMFRC522(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;
}
//??FIFO??????? Lea los datos recibidos en el FIFO
for (i=0; i<n; i++)
{
backData[i] = readMFRC522(FIFODataReg);
}
}
}
else
{
status = MI_ERR;
}
}
//SetBitMask(ControlReg,0x80); //timer stops
//Write_MFRC522(CommandReg, PCD_IDLE);
return status;
}
/*
* Nombre de la funci<63>n: MFRC522_Request
* Descripci<63>n: Buscar las cartas, leer el n<>mero de tipo de tarjeta
* Los par<61>metros de entrada: reqMode - encontrar el modo de tarjeta,
* Tagtype - Devuelve el tipo de tarjeta
* 0x4400 = Mifare_UltraLight
* 0x0400 = Mifare_One(S50)
* 0x0200 = Mifare_One(S70)
* 0x0800 = Mifare_Pro(X)
* 0x4403 = Mifare_DESFire
* Valor de retorno: el retorno exitoso MI_OK
*/
unsigned char RFID::MFRC522Request(unsigned char reqMode, unsigned char *TagType)
{
unsigned char status;
unsigned int backBits; // Recibi<62> bits de datos
writeMFRC522(BitFramingReg, 0x07); //TxLastBists = BitFramingReg[2..0] ???
TagType[0] = reqMode;
status = MFRC522ToCard(PCD_TRANSCEIVE, TagType, 1, TagType, &backBits);
if ((status != MI_OK) || (backBits != 0x10))
{
status = MI_ERR;
}
return status;
}
/**
* MFRC522Anticoll -> anticoll
* Anti-detecci<63>n de colisiones, la lectura del n<>mero de serie de la tarjeta de tarjeta
* @param serNum - devuelve el n<>mero de tarjeta 4 bytes de serie, los primeros 5 bytes de bytes de paridad
* @return retorno exitoso MI_OK
*/
unsigned char RFID::anticoll(unsigned char *serNum)
{
unsigned char status;
unsigned char i;
unsigned char serNumCheck=0;
unsigned int unLen;
//ClearBitMask(Status2Reg, 0x08); //TempSensclear
//ClearBitMask(CollReg,0x80); //ValuesAfterColl
writeMFRC522(BitFramingReg, 0x00); //TxLastBists = BitFramingReg[2..0]
serNum[0] = PICC_ANTICOLL;
serNum[1] = 0x20;
status = MFRC522ToCard(PCD_TRANSCEIVE, serNum, 2, serNum, &unLen);
if (status == MI_OK)
{
//?????? Compruebe el n<>mero de serie de la tarjeta
for (i=0; i<4; i++)
{
serNumCheck ^= serNum[i];
}
if (serNumCheck != serNum[i])
{
status = MI_ERR;
}
}
//SetBitMask(CollReg, 0x80); //ValuesAfterColl=1
return status;
}
/*
* MFRC522Auth -> auth
* Verificar la contrase<73>a de la tarjeta
* Los par<61>metros de entrada: AuthMode - Modo de autenticaci<63>n de contrase<73>a
0x60 = A 0x60 = validaci<63>n KeyA
0x61 = B 0x61 = validaci<63>n KeyB
BlockAddr-- bloque de direcciones
Sectorkey-- sector contrase<73>a
serNum--,4? Tarjeta de n<>mero de serie, 4 bytes
* MI_OK Valor de retorno: el retorno exitoso MI_OK
*/
unsigned char RFID::auth(unsigned char authMode, unsigned char BlockAddr, unsigned char *Sectorkey, unsigned char *serNum)
{
unsigned char status;
unsigned int recvBits;
unsigned char i;
unsigned char buff[12];
//????+???+????+???? Verifique la direcci<63>n de comandos de bloques del sector + + contrase<73>a + n<>mero de la tarjeta de serie
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 = MFRC522ToCard(PCD_AUTHENT, buff, 12, buff, &recvBits);
if ((status != MI_OK) || (!(readMFRC522(Status2Reg) & 0x08)))
{
status = MI_ERR;
}
return status;
}
/*
* MFRC522Read -> read
* Lectura de datos de bloque
* Los par<61>metros de entrada: blockAddr - direcci<63>n del bloque; recvData - leer un bloque de datos
* MI_OK Valor de retorno: el retorno exitoso MI_OK
*/
unsigned char RFID::read(unsigned char blockAddr, unsigned char *recvData)
{
unsigned char status;
unsigned int unLen;
recvData[0] = PICC_READ;
recvData[1] = blockAddr;
calculateCRC(recvData,2, &recvData[2]);
status = MFRC522ToCard(PCD_TRANSCEIVE, recvData, 4, recvData, &unLen);
if ((status != MI_OK) || (unLen != 0x90))
{
status = MI_ERR;
}
return status;
}
/*
* MFRC522Write -> write
* La escritura de datos de bloque
* blockAddr - direcci<63>n del bloque; WriteData - para escribir 16 bytes del bloque de datos
* Valor de retorno: el retorno exitoso MI_OK
*/
unsigned char RFID::write(unsigned char blockAddr, unsigned char *writeData)
{
unsigned char status;
unsigned int recvBits;
unsigned char i;
unsigned char buff[18];
buff[0] = PICC_WRITE;
buff[1] = blockAddr;
calculateCRC(buff, 2, &buff[2]);
status = MFRC522ToCard(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++) //?FIFO?16Byte?? Datos a la FIFO 16Byte escribir
{
buff[i] = *(writeData+i);
}
calculateCRC(buff, 16, &buff[16]);
status = MFRC522ToCard(PCD_TRANSCEIVE, buff, 18, buff, &recvBits);
if ((status != MI_OK) || (recvBits != 4) || ((buff[0] & 0x0F) != 0x0A))
{
status = MI_ERR;
}
}
return status;
}
/*
* MFRC522Halt -> halt
* Cartas de Mando para dormir
* Los par<61>metros de entrada: Ninguno
* Valor devuelto: Ninguno
*/
void RFID::halt()
{
unsigned char status;
unsigned int unLen;
unsigned char buff[4];
buff[0] = PICC_HALT;
buff[1] = 0;
calculateCRC(buff, 2, &buff[2]);
status = MFRC522ToCard(PCD_TRANSCEIVE, buff, 4, buff,&unLen);
}