#ifndef FX2_IIC_H
#define FX2_IIC_H

#include <fx2.h>

// I2C error codes
// -----------------------------------------------------------------------------
#define I2C_OK                  0x00
#define I2C_ERROR               0x80
#define I2C_ABORT				0xFF
#define	SMB_ERROR				0xC0


// I2C state machine states
// -----------------------------------------------------------------------------
#define I2C_IDLE                0x00
#define I2C_SENDING             0x01
#define I2C_RECEIVING           0x02
#define I2C_PRIME               0x03
#define I2C_BERROR              0x04
#define I2C_NACK                0x05
#define I2C_STOP                0x06
#define I2C_WAITSTOP            0x07


// I2C state machine states for read operation with repeated start condition
// -----------------------------------------------------------------------------
#define	I2C_SUBADDR_HI			0x10	// sending HI(subaddr)
#define	I2C_SUBADDR_LO			0x11	// sending LO(subaddr)
#define	I2C_RESTART				0x12	//


// SMBus state machine states
// -----------------------------------------------------------------------------
#define SMB_SENDING				0x40
#define SMB_RECEIVING			0x41
#define SMB_PRIME				0x43
#define SMB_BERROR				0x44
#define SMB_NACK				0x45
#define	SMB_STOP				0x46
#define	SMB_WAITSTOP			0x47
#define	SMB_PEC					0x48
#define	SMB_CMD_READWORD		0x50
#define SMB_READWORD			0x51


extern void fx2_i2c_init();

extern BYTE	fx2_i2c_wait( 		BYTE addr);

extern BYTE	fx2_i2c_read(		BYTE addr,
								BYTE length,
								BYTE xdata *dat);

extern BYTE	fx2_i2c_write(		BYTE addr,
								BYTE length,
								BYTE xdata *dat);

extern BYTE fx2_i2c_read_rsw(	BYTE addr,
								WORD subaddr,
								BYTE length,
								BYTE xdata *dat);

extern BYTE fx2_sm_readword(	BYTE addr,
								BYTE command,
								BYTE xdata *dat);

#endif