#ifndef I2C_H_QWERTY
#define I2C_H_QWERTY


#include <stdio.h>
#include <avr/io.h>

extern uint8_t i2c_error;
extern uint8_t i2c_status;


#define I2C_ERR_START	        0 // Timeout start condition
#define I2C_ERR_RESTART	        1 // Timeout start condition
#define I2C_ERR_WRITE	        2 // Timeout byte transmission
#define I2C_ERR_READACK	        3 // Timeout read acknowledge
#define I2C_ERR_READNACK	4 // Timeout read nacknowledge

void i2c_init(void);

void i2c_start(void);
void i2c_write(uint8_t byte);
void i2c_restart(void);
uint8_t i2c_read_ack(void);
uint8_t i2c_read_nack(void);
void i2c_stop(void);

#endif