/******************************************************************************
* 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);
}
/*
* MFRC522Auth -> auth
* Verificar la contraseña de la tarjeta
* Los parámetros de entrada: AuthMode - Modo de autenticación de contraseña
0x60 = A 0x60 = validación KeyA
0x61 = B 0x61 = validación KeyB
BlockAddr-- bloque de direcciones
Sectorkey-- sector contraseña
serNum--,4? Tarjeta de número de serie, 4 bytes
* MI_OK Valor de retorno: el retorno exitoso MI_OK
*/
uint8_t RFID::auth(uint8_t authMode, uint8_t BlockAddr, uint8_t *Sectorkey, uint8_t *serNum)
{
uint8_t status;
uint16_t recvBits;
uint8_t i;
uint8_t buff[12];
//????+???+????+???? Verifique la dirección de comandos de bloques del sector + + contraseña + número 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;
}
/*
* MFRC522Auth -> auth
* Verificar la contraseña de la tarjeta
* Los parámetros de entrada: AuthMode - Modo de autenticación de contraseña
0x60 = A 0x60 = validación KeyA
0x61 = B 0x61 = validación KeyB
BlockAddr-- bloque de direcciones
Sectorkey-- sector contraseña
serNum--,4? Tarjeta de número 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 dirección de comandos de bloques del sector + + contraseña + número 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;
}
void RFID::antennaOn(void)
{
uint8_t temp;
temp = readMFRC522(TxControlReg);
if (!(temp & 0x03))
{
setBitMask(TxControlReg, 0x03);
}
}
/******************************************************************************
* 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);
}
}
/******************************************************************************
* 函 数 名：auth
* 功能描述：验证卡片密码
* 输入参数：authMode--密码验证模式
* 0x60 = 验证A密钥
* 0x61 = 验证B密钥
* BlockAddr--块地址
* Sectorkey--扇区密码
* serNum--卡片序列号，4字节
* 返 回 值：成功返回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];
//验证指令+块地址＋扇区密码＋卡序列号
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;
}
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;
}
void RFID::clearBitMask(uint8_t reg, uint8_t mask)
{
uint8_t tmp;
tmp = readMFRC522(reg);
writeMFRC522(reg, tmp & (~mask)); // clear bit mask
}
void RFID::setBitMask(uint8_t reg, uint8_t mask)
{
uint8_t 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::setBitMask(unsigned char reg, unsigned char mask)
{
unsigned char tmp;
tmp = readMFRC522(reg);
writeMFRC522(reg, tmp | mask); // set bit mask
}
/******************************************************************************
* 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;
}
