#ifndef MFRC522_H
#define MFRC522_H

#include <stdint.h>


#define SPI_SS_PIN   13  // pin to be connected to cs(chip select pin)
#define SPI_SCK_PIN  17  // pin to be connected to clock pin (scl)
#define SPI_MISO_PIN 13  // pin to be connected to MISO 
#define SPI_MOSI_PIN 15  // pin to be connected to MOSI  


#define    SPIFlash_CS_LOW    nrf_gpio_pin_clear(SPI_SS_PIN)   // a simple function call to clear the cs pin
#define    SPIFlash_CS_HIGH   nrf_gpio_pin_set(SPI_SS_PIN)     //a simple function call to set the cs pin 



/* MFRC522 status */
typedef enum {
    MI_OK = 0,
    MI_NOTAGERR,
    MI_ERR
} TM_MFRC522_STS_T;

/* MFRC522 commands */
#define PCD_IDLE						0x00   // No action; Cancel the current command
#define PCD_AUTHENT						0x0E   // Authentication Key
#define PCD_RECEIVE						0x08   // Receive Data
#define PCD_TRANSMIT					0x04   // Transmit data
#define PCD_TRANSCEIVE					0x0C   // Transmit and receive data,
#define PCD_RESETPHASE					0x0F   // Reset
#define PCD_CALCCRC						0x03   // CRC Calculate

/* Mifare One card command word */
#define PICC_REQA						0x26   // find the antenna area does not enter hibernation
#define PICC_WAKEUP						0x52   // find all the cards antenna area
#define PICC_ANTICOLL					0x93   // anti-collision
#define PICC_SElECTTAG					0x93   // election card
#define PICC_AUTHENT1A					0x60   // authentication key A
#define PICC_AUTHENT1B					0x61   // authentication key B
#define PICC_READ						0x30   // Read Block
#define PICC_WRITE						0xA0   // write block
#define PICC_DECREMENT					0xC0   // debit
#define PICC_INCREMENT					0xC1   // recharge
#define PICC_RESTORE					0xC2   // transfer block data to the buffer
#define PICC_TRANSFER					0xB0   // save the data in the buffer
#define PICC_HALT						0x50   // Sleep

/* MFRC522 Registers */
/* Page 0: Command and Status */
#define MFRC522_REG_RESERVED00			0x00    
#define MFRC522_REG_COMMAND				0x01    
#define MFRC522_REG_COMM_IE_N			0x02    
#define MFRC522_REG_DIV1_EN				0x03    
#define MFRC522_REG_COMM_IRQ			0x04    
#define MFRC522_REG_DIV_IRQ				0x05
#define MFRC522_REG_ERROR				0x06    
#define MFRC522_REG_STATUS1				0x07    
#define MFRC522_REG_STATUS2				0x08    
#define MFRC522_REG_FIFO_DATA			0x09
#define MFRC522_REG_FIFO_LEVEL			0x0A
#define MFRC522_REG_WATER_LEVEL			0x0B
#define MFRC522_REG_CONTROL				0x0C
#define MFRC522_REG_BIT_FRAMING			0x0D
#define MFRC522_REG_COLL				0x0E
#define MFRC522_REG_RESERVED01			0x0F

/* Page 1: Command */
#define MFRC522_REG_RESERVED10			0x10
#define MFRC522_REG_MODE				0x11
#define MFRC522_REG_TX_MODE				0x12
#define MFRC522_REG_RX_MODE				0x13
#define MFRC522_REG_TX_CONTROL			0x14
#define MFRC522_REG_TX_AUTO				0x15
#define MFRC522_REG_TX_SELL				0x16
#define MFRC522_REG_RX_SELL				0x17
#define MFRC522_REG_RX_THRESHOLD		0x18
#define MFRC522_REG_DEMOD				0x19
#define MFRC522_REG_RESERVED11			0x1A
#define MFRC522_REG_RESERVED12			0x1B
#define MFRC522_REG_MIFARE				0x1C
#define MFRC522_REG_RESERVED13			0x1D
#define MFRC522_REG_RESERVED14			0x1E
#define MFRC522_REG_SERIALSPEED			0x1F

/* Page 2: Configuration */
#define MFRC522_REG_RESERVED20			0x20  
#define MFRC522_REG_CRC_RESULT_M		0x21
#define MFRC522_REG_CRC_RESULT_L		0x22
#define MFRC522_REG_RESERVED21			0x23
#define MFRC522_REG_MOD_WIDTH			0x24
#define MFRC522_REG_RESERVED22			0x25
#define MFRC522_REG_RF_CFG				0x26
#define MFRC522_REG_GS_N				0x27
#define MFRC522_REG_CWGS_PREG			0x28
#define MFRC522_REG__MODGS_PREG			0x29
#define MFRC522_REG_T_MODE				0x2A
#define MFRC522_REG_T_PRESCALER			0x2B
#define MFRC522_REG_T_RELOAD_H			0x2C
#define MFRC522_REG_T_RELOAD_L			0x2D
#define MFRC522_REG_T_COUNTER_VALUE_H	0x2E
#define MFRC522_REG_T_COUNTER_VALUE_L	0x2F

/* Page 3:TestRegister */
#define MFRC522_REG_RESERVED30			0x30
#define MFRC522_REG_TEST_SEL1			0x31
#define MFRC522_REG_TEST_SEL2			0x32
#define MFRC522_REG_TEST_PIN_EN			0x33
#define MFRC522_REG_TEST_PIN_VALUE		0x34
#define MFRC522_REG_TEST_BUS			0x35
#define MFRC522_REG_AUTO_TEST			0x36
#define MFRC522_REG_VERSION				0x37
#define MFRC522_REG_ANALOG_TEST			0x38
#define MFRC522_REG_TEST_ADC1			0x39  
#define MFRC522_REG_TEST_ADC2			0x3A   
#define MFRC522_REG_TEST_ADC0			0x3B   
#define MFRC522_REG_RESERVED31			0x3C   
#define MFRC522_REG_RESERVED32			0x3D
#define MFRC522_REG_RESERVED33			0x3E   
#define MFRC522_REG_RESERVED34			0x3F

#define MFRC522_DUMMY					0x00
#define MFRC522_MAX_LEN					16

/*---------------------------------------------------------------------------------------------------------*/
/* Function declaration                                                                                    */
/*---------------------------------------------------------------------------------------------------------*/
void MFRC522_Halt();

void SPI_Init(void); 
void TM_MFRC522_Init(void);
uint8_t TM_MFRC522_RdReg(uint8_t ucAddress);
void TM_MFRC522_WrReg(uint8_t ucAddress, uint8_t ucValue);
void TM_MFRC522_SetBitMask(uint8_t reg, uint8_t mask);
void TM_MFRC522_ClearBitMask(uint8_t reg, uint8_t mask);
void TM_MFRC522_AntennaOn(void);
void TM_MFRC522_AntennaOff(void);
void TM_MFRC522_Reset(void);
uint8_t MFRC522_ToCard(uint8_t command, uint8_t *sendData, uint8_t sendLen, uint8_t *backData,unsigned *backLen);
uint8_t MFRC522_isCard(uint8_t *TagType ) ;
TM_MFRC522_STS_T TM_MFRC522_ToCard(uint8_t command, uint8_t* sendData, uint8_t sendLen, uint8_t* backData, uint16_t* backLen);
TM_MFRC522_STS_T TM_MFRC522_Anticoll(uint8_t* serNum);
void TM_MFRC522_CalculateCRC(uint8_t*  pIndata, uint8_t len, uint8_t* pOutData);
void TM_MFRC522_Halt(void);
uint8_t TM_MFRC522_Check(uint8_t *id);
uint8_t MFRC522_Request(uint8_t reqMode, uint8_t *TagType);
#endif