void mfrc522_init()
{
mfrc522_reset();
// mfrc522_write(TModeReg, 0x8D);
//
// mfrc522_write(TPrescalerReg, 0x3E);
// mfrc522_write(TReloadReg_1, 30);
// mfrc522_write(TReloadReg_2, 0);
// Config timer to periodically trigger PCD to check PICC.
mfrc522_write(TModeReg, 0x00);
// Prescaler is 169, timer tick is 2x169 + 1 = 339 tacts, fq is 13.56Mhz,
// so 339 * 1 / 13.56 = 0.000025 = 25us per timer tick.
mfrc522_write(TPrescalerReg, 0xa9);
// Reload val is 1600. 1600 * 0.000025 (25us) = 40ms.
mfrc522_write(TReloadReg_1, 0x6);
mfrc522_write(TReloadReg_2, 0x40);
mfrc522_write(TxASKReg, 0x40);
mfrc522_write(ModeReg, 0x3D);
uint8_t byte = mfrc522_read(TxControlReg);
if(!(byte & 0x03))
{
mfrc522_write(TxControlReg, byte | 0x03);
}
// Activate IRQ signal.
mfrc522_write(ComIEnReg, 1 << RxIEn | TimerIEn);
mfrc522_write(DivIEnReg, 1 << IRQPushPull);
}
void mfrc522_init( void ){
mfrc522_pin_init();
mfrc522_reset();
__mfrc522_writeReg( MFRC522_REG_TMode, 0x82 );
__mfrc522_writeReg( MFRC522_REG_TPrescaler, 0xa6 );
mfrc522_delay_ms( 1 );
}
void mfrc522_init()
{
uint8_t byte;
mfrc522_reset();
mfrc522_write(TModeReg, 0x8D);
mfrc522_write(TPrescalerReg, 0x3E);
mfrc522_write(TReloadReg_1, 30);
mfrc522_write(TReloadReg_2, 0);
mfrc522_write(TxASKReg, 0x40);
mfrc522_write(ModeReg, 0x3D);
byte = mfrc522_read(TxControlReg);
if(!(byte&0x03))
{
mfrc522_write(TxControlReg,byte|0x03);
}
}
