#ifndef I2C_H_
#define I2C_H_

#ifndef F_CPU
#define F_CPU				8000000UL
#endif

#include <avr/io.h>
#include <util/delay.h>

#define DDR_I2C				DDRA
#define PORT_I2C			PORTA
#define PIN_I2C				PINA
#define SDA					PORTA6
#define SCL					PORTA4
#define pause				10

void i2start (void);      
void i2stop (void);          
void i2nack (void);       
void i2write (uint8_t);
uint8_t i2read (void);  
uint8_t i2ack (void);

#endif