i2cmaster.h

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#ifndef _I2CMASTER_H
#define _I2CMASTER_H
/************************************************************************* 
* Title:    C include file for the I2C master interface 
*           (i2cmaster.S or twimaster.c)
* Author:   Peter Fleury <pfleury@gmx.ch>  http://jump.to/fleury
* File:     $Id: i2cmaster.h,v 1.11 2015/01/17 12:16:05 peter Exp $
* Software: AVR-GCC 3.4.3 / avr-libc 1.2.3
* Target:   any AVR device
* Usage:    see Doxygen manual
**************************************************************************/

#if (__GNUC__ * 100 + __GNUC_MINOR__) < 304
#error "This library requires AVR-GCC 3.4 or later, update to newer AVR-GCC compiler !"
#endif

#include <avr/io.h>

#define I2C_READ    1

#define I2C_WRITE   0


extern void i2c_init(void);


extern void i2c_stop(void);


extern unsigned char i2c_start(unsigned char addr);


extern unsigned char i2c_rep_start(unsigned char addr);


extern void i2c_start_wait(unsigned char addr);

 
extern unsigned char i2c_write(unsigned char data);


extern unsigned char i2c_readAck(void);

extern unsigned char i2c_readNak(void);

extern unsigned char i2c_read(unsigned char ack);
#define i2c_read(ack)  (ack) ? i2c_readAck() : i2c_readNak(); 



#endif