/******************************************************************************
* 函 数 名：calculateCRC
* 功能描述：用MF522计算CRC
* 输入参数：pIndata--要读数CRC的数据，len--数据长度，pOutData--计算的CRC结果
* 返 回 值：无
******************************************************************************/
void RFID::calculateCRC(unsigned char *pIndata, unsigned char len, unsigned char *pOutData)
{
unsigned char i, n;
clearBitMask(DivIrqReg, 0x04); //CRCIrq = 0
setBitMask(FIFOLevelReg, 0x80); //清FIFO指针
//Write_MFRC522(CommandReg, PCD_IDLE);
//向FIFO中写入数据
for (i=0; i<len; i++)
writeMFRC522(FIFODataReg, *(pIndata+i));
writeMFRC522(CommandReg, PCD_CALCCRC);
//等待CRC计算完成
i = 0xFF;
do
{
n = readMFRC522(DivIrqReg);
i--;
}
while ((i!=0) && !(n&0x04)); //CRCIrq = 1
//读取CRC计算结果
pOutData[0] = readMFRC522(CRCResultRegL);
pOutData[1] = readMFRC522(CRCResultRegM);
}
void RFID::calculateCRC(uint8_t *pIndata, uint8_t len, uint8_t *pOutData)
{
uint8_t 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 finalización de cálculo del CRC
i = 0xFF;
do
{
n = readMFRC522(DivIrqReg);
i--;
}
while ((i!=0) && !(n&0x04)); //CRCIrq = 1
//Lea el cálculo de CRC
pOutData[0] = readMFRC522(CRCResultRegL);
pOutData[1] = readMFRC522(CRCResultRegM);
}
void MFRC522::haltTag() {
int status, len;
byte buffer[4];
buffer[0] = MF1_HALT;
buffer[1] = 0;
calculateCRC(buffer, 2, &buffer[2]);
clearBitMask(Status2Reg, 0x08); // turn off encryption
status = commandTag(MFRC522_TRANSCEIVE, buffer, 4, buffer, &len);
}
/******************************************************************************
* 函 数 名：antennaOff
* 功能描述：关闭天线,每次启动或关闭天险发射之间应至少有1ms的间隔
* 输入参数：无
* 返 回 值：无
******************************************************************************/
void RFID::antennaOff(void)
{
unsigned char temp;
temp = readMFRC522(TxControlReg);
if (!(temp & 0x03))
{
clearBitMask(TxControlReg, 0x03);
}
}
/*
* MFRC522Halt -> halt
* Cartas de Mando para dormir
* Los parámetros de entrada: Ninguno
* Valor devuelto: Ninguno
*/
void RFID::halt()
{
uint8_t status;
uint16_t unLen;
uint8_t buff[4];
buff[0] = PICC_HALT;
buff[1] = 0;
calculateCRC(buff, 2, &buff[2]);
clearBitMask(Status2Reg, 0x08); // turn off encryption
status = MFRC522ToCard(PCD_TRANSCEIVE, buff, 4, buff,&unLen);
}
void MFRC522::calculateCRC(byte *data, int len, byte *result) {
int i;
byte n;
clearBitMask(DivIrqReg, 0x04); // CRCIrq = 0
setBitMask(FIFOLevelReg, 0x80); // Clear the FIFO pointer
//Writing data to the FIFO.
for (i = 0; i < len; i++) {
writeToRegister(FIFODataReg, data[i]);
}
writeToRegister(CommandReg, MFRC522_CALCCRC);
// Wait for the CRC calculation to complete.
i = 0xFF;
do {
n = readFromRegister(DivIrqReg);
i--;
} while ((i != 0) && !(n & 0x04)); //CRCIrq = 1
// Read the result from the CRC calculation.
result[0] = readFromRegister(CRCResultRegL);
result[1] = readFromRegister(CRCResultRegM);
}
uint8_t RFID::MFRC522ToCard(uint8_t command, uint8_t *sendData, uint8_t sendLen, uint8_t *backData, uint16_t *backLen)
{
uint8_t status = MI_ERR;
uint8_t irqEn = 0x00;
uint8_t waitIRq = 0x00;
uint8_t lastBits;
uint8_t n;
uint16_t i;
switch (command)
{
case PCD_AUTHENT: // Tarjetas de certificación cerca
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE: //La transmisión de datos FIFO
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
}
writeMFRC522(CommIEnReg, irqEn|0x80); //De solicitud de interrupción
clearBitMask(CommIrqReg, 0x80); // Borrar todos los bits de petición de interrupción
setBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO de inicialización
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 máximo de espera operación 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;
}
int MFRC522::commandTag(byte cmd, byte *data, int dlen, byte *result, int *rlen) {
int status = MI_ERR;
byte irqEn = 0x00;
byte waitIRq = 0x00;
byte lastBits, n;
int i;
switch (cmd) {
case MFRC522_AUTHENT:
irqEn = 0x12;
waitIRq = 0x10;
break;
case MFRC522_TRANSCEIVE:
irqEn = 0x77;
waitIRq = 0x30;
break;
default:
break;
}
writeToRegister(CommIEnReg, irqEn|0x80); // interrupt request
clearBitMask(CommIrqReg, 0x80); // Clear all interrupt requests bits.
setBitMask(FIFOLevelReg, 0x80); // FlushBuffer=1, FIFO initialization.
writeToRegister(CommandReg, MFRC522_IDLE); // No action, cancel the current command.
// Write to FIFO
for (i=0; i < dlen; i++) {
writeToRegister(FIFODataReg, data[i]);
}
// Execute the command.
writeToRegister(CommandReg, cmd);
if (cmd == MFRC522_TRANSCEIVE) {
setBitMask(BitFramingReg, 0x80); // StartSend=1, transmission of data starts
}
// Waiting for the command to complete so we can receive data.
i = 25; // Max wait time is 25ms.
do {
delay(1);
// CommIRqReg[7..0]
// Set1 TxIRq RxIRq IdleIRq HiAlerIRq LoAlertIRq ErrIRq TimerIRq
n = readFromRegister(CommIrqReg);
i--;
} while ((i!=0) && !(n&0x01) && !(n&waitIRq));
clearBitMask(BitFramingReg, 0x80); // StartSend=0
if (i != 0) { // Request did not time out.
if(!(readFromRegister(ErrorReg) & 0x1D)) { // BufferOvfl Collerr CRCErr ProtocolErr
status = MI_OK;
if (n & irqEn & 0x01) {
status = MI_NOTAGERR;
}
if (cmd == MFRC522_TRANSCEIVE) {
n = readFromRegister(FIFOLevelReg);
lastBits = readFromRegister(ControlReg) & 0x07;
if (lastBits) {
*rlen = (n-1)*8 + lastBits;
} else {
*rlen = n*8;
}
if (n == 0) {
n = 1;
}
if (n > MAX_LEN) {
n = MAX_LEN;
}
// Reading the recieved data from FIFO.
for (i=0; i<n; i++) {
result[i] = readFromRegister(FIFODataReg);
}
}
} else {
status = MI_ERR;
}
}
return status;
}
/******************************************************************************
* 函 数 名：MFRC522ToCard
* 功能描述：RC522和ISO14443卡通讯
* 输入参数：command--MF522命令字，
* sendData--通过RC522发送到卡片的数据,
* sendLen--发送的数据长度
* backData--接收到的卡片返回数据，
* backLen--返回数据的位长度
* 返 回 值：成功返回MI_OK
******************************************************************************/
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: //认证卡密
{
irqEn = 0x12;
waitIRq = 0x10;
break;
}
case PCD_TRANSCEIVE: //发送FIFO中数据
{
irqEn = 0x77;
waitIRq = 0x30;
break;
}
default:
break;
}
writeMFRC522(CommIEnReg, irqEn|0x80); //允许中断请求
clearBitMask(CommIrqReg, 0x80); //清除所有中断请求位
setBitMask(FIFOLevelReg, 0x80); //FlushBuffer=1, FIFO初始化
writeMFRC522(CommandReg, PCD_IDLE); //无动作，取消当前命令
//向FIFO中写入数据
for (i=0; i<sendLen; i++)
writeMFRC522(FIFODataReg, sendData[i]);
//执行命令
writeMFRC522(CommandReg, command);
if (command == PCD_TRANSCEIVE)
setBitMask(BitFramingReg, 0x80); //StartSend=1,transmission of data starts
//等待接收数据完成
i = 2000; //i根据时钟频率调整，操作M1卡最大等待时间25ms
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;
//读取FIFO中接收到的数据
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;
}
