#ifndef _I2C_H
#define _I2C_H

/* PIC18 I2C peripheral library header */

/* SSPCON1 REGISTER */
#define   SSPENB    			0b00100000  /* Enable serial port and configures SCK, SDO, SDI                      */
#define   SLAVE_7   			0b00000110     /* I2C Slave mode, 7-bit address      */
#define   SLAVE_10  			0b00000111     /* I2C Slave mode, 10-bit address     */
#define   MASTER    			0b00001000     /* I2C Master mode                    */
#define   MASTER_FIRMW			0b00001011
#define   SLAVE_7_STSP_INT 		0b00001110
#define   SLAVE_10_STSP_INT 	0b00001111
/* SSPSTAT REGISTER */
#define   SLEW_OFF  			0b11000000  /* Slew rate disabled for 100kHz mode */
#define   SLEW_ON   			0b00000000  /* Slew rate enabled for 400kHz mode  */

/* StopI2C
 * Generate bus stop condition
 */
#define StopI2C()  PEN=1

/* StartI2C
 * Generate bus start condition
 */
#define StartI2C()  SEN=1

/* RestartI2C
 * Generate bus restart condition
 */
#define RestartI2C()  RSEN=1

/* NotAckI2C
 * Generate bus Not ACK condition
 */
#define NotAckI2C()     ACKDT=1, ACKEN=1

/* AckI2C
 * Generate bus ACK condition
 */
#define AckI2C()        ACKDT=0, ACKEN=1

/* Idle I2C
 * Test if I2C module is idle
 */
#define IdleI2C()    while ((SSPCON2 & 0x1F) | (RW))

/* CloseI2C
 * Disable SPI module
 */
#define CloseI2C()  SSPCON1 &=0xDF

/* OpenI2C
 * Configure SSP module for use with I2C EEPROM or I2C bus device.
 */
void OpenI2C( unsigned char sync_mode, unsigned char slew );

/* DataRdyI2C
 * Test if SSPBUF register is full
 */
#define DataRdyI2C()    (BF)

/* ReadI2C
 * Read byte from SSPBUF register
 */
unsigned char ReadI2C( void );

/* GetcI2C
 * Read byte from SSPBUF register
 */
#define  getcI2C  ReadI2C

/* WriteI2C
 * Write byte to SSPBUF register
 */
unsigned char WriteI2C( unsigned char data_out );

/* putcI2C
 * Write byte to SSPBUF register
 */
#define  putcI2C  WriteI2C

/* getsI2C
 * Read in a string from I2C module
 */
unsigned char getsI2C( unsigned char *rdptr, unsigned char length );

/* putsI2C
 * Write a string to I2C module
 */
signed char putsI2C( unsigned char *wrptr );

#define I2C_SCL	TRISB1
#define I2C_SDA	TRISB0

#endif