void MFRC522_Init(void)
{
MFRC522_DDR |= _BV(MFRC522_CS);
MFRC522_CS_High();
//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); //CRC0x6363
//ClearBitMask(Status2Reg, 0x08); //MFCrypto1On=0
//Write_MFRC522(RxSelReg, 0x86); //RxWait = RxSelReg[5..0]
//Write_MFRC522(RFCfgReg, 0x7F); //RxGain = 48dB
AntennaOn();
}
/*
Function: void MFRC522_Init(void)
Description: Initialize all Hardware & Software configuration in RFID Reader.
*/
void MFRC522_Init(void)
{
MFRC522_Reset();
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初始值0x6363 ???
AntennaOn(); //打开天线
}
void RFID::MFRC522_Init(void) {
digitalWrite(NRSTPD,HIGH);
MFRC522_Reset();
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???0x6363 ???
AntennaOn(); //????
}
MFRC522::MFRC522()
{
/* Set Reset pin */
MFRC522_PORT.OUTCLR = 1<<MFRC522_RESET_PIN; /* Reset on */
MFRC522_PORT.DIRSET = 1<<MFRC522_RESET_PIN; /* Set as output */
MFRC522_PORT.OUTSET = 1<<MFRC522_RESET_PIN; /* Reset off */
/* Setup SPI driver */
spi_set_master_port_dir(MFRC522_PORT);
spi_cs_disable(MFRC522_PORT);
spi_set_mode(MFRC522_SPI,SPI_MODE_0_gc);
spi_set_dord(MFRC522_SPI,SPI_DORD_MSB_FIRST);
spi_enable_master(MFRC522_SPI);
/* Set SPI Baudrate */
#if (MFRC522_BAUD <= F_CPU/128)
MFRC522_SPI.CTRL |= SPI_PRESCALER_DIV128_gc;
#elif (MFRC522_BAUD <= F_CPU/64)
MFRC522_SPI.CTRL |= SPI_PRESCALER_DIV64_gc;
#elif (MFRC522_BAUD <= F_CPU/32)
MFRC522_SPI.CTRL |= 1<<SPI_CLK2X_bp|SPI_PRESCALER_DIV64_gc;
#elif (MFRC522_BAUD <= F_CPU/16)
MFRC522_SPI.CTRL |= SPI_PRESCALER_DIV16_gc;
#elif (MFRC522_BAUD <= F_CPU/8)
MFRC522_SPI.CTRL |= 1<<SPI_CLK2X_bp|SPI_PRESCALER_DIV16_gc;
#elif (MFRC522_BAUD <= F_CPU/4)
MFRC522_SPI.CTRL |= SPI_PRESCALER_DIV4_gc;
#elif (MFRC522_BAUD <= F_CPU/2)
MFRC522_SPI.CTRL |= 1<<SPI_CLK2X_bp|SPI_PRESCALER_DIV4_gc;
#else
MFRC522_SPI.CTRL |= 1<<SPI_CLK2X_bp|SPI_PRESCALER_DIV4_gc;
#endif
/* Set interrupt on pin MFRC522_IRQ_PIN */
MFRC522_PORT.INT0MASK = 1<<MFRC522_IRQ_PIN;
MFRC522_PORT.INTCTRL = PORT_INT0LVL_HI_gc;
#if MFRC522_IRQ_PIN == 0
MFRC522_PORT.PIN0CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 1
MFRC522_PORT.PIN1CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 2
MFRC522_PORT.PIN2CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 3
MFRC522_PORT.PIN3CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 4
MFRC522_PORT.PIN4CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 5
MFRC522_PORT.PIN5CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 6
MFRC522_PORT.PIN6CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#elif MFRC522_IRQ_PIN == 7
MFRC522_PORT.PIN7CTRL = PORT_ISC_FALLING_gc|PORT_OPC_PULLUP_gc;
#endif
for (uint16_t i=0; i<0x7FFF; i++); /* Wait routine until oscillator is ready. t >= 37.74us */
WriteReg(REG_CommandReg,COMM_SoftReset); /* Soft Reset */
WriteReg(REG_TModeReg, 0x80); /* TAuto=1; timer starts automatically at the end of the transmission in all communication modes at all speeds */
WriteReg(REG_TPrescalerReg, 0xA9); /* TPreScaler = TModeReg[3..0]:TPrescalerReg, ie 0x0A9 = 169 => f_timer=40kHz, ie a timer period of 25us. */
WriteReg(REG_TReloadRegH, 0x03); /* Reload timer with 0x3E8 = 1000, ie 25ms before timeout. */
WriteReg(REG_TReloadRegL, 0xe8);
WriteReg(REG_TxASKReg, 0x40); /* Default 0x00. Force a 100 % ASK modulation independent of the ModGsPReg register setting */
WriteReg(REG_ModeReg, 0x3D); /* Default 0x3F. Set the preset value for the CRC coprocessor for the CalcCRC command to 0x6363 (ISO 14443-3 part 6.2.4) */
AntennaOn();
}
