i2c.h

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/*
 * Copyright (C) 2014-2015 Freie Universität Berlin
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

#ifndef PERIPH_I2C_H
#define PERIPH_I2C_H

#include <stdint.h>
#include <limits.h>

#include "periph_cpu.h"
#include "periph/dev_enums.h"

#ifdef __cplusplus
extern "C" {
#endif

#define I2C_FLAG_WRITE      0

#define I2C_FLAG_READ       1

#ifndef I2C_DEV
#define I2C_DEV(x)          (x)
#endif

#ifndef I2C_UNDEF
#define I2C_UNDEF           (UINT_MAX)
#endif

#ifndef HAVE_I2C_T
typedef unsigned int i2c_t;
#endif

#ifndef HAVE_I2C_SPEED_T
typedef enum {
    I2C_SPEED_LOW = 0,      
    I2C_SPEED_NORMAL,       
    I2C_SPEED_FAST,         
    I2C_SPEED_FAST_PLUS,    
    I2C_SPEED_HIGH,         
} i2c_speed_t;
#endif

int i2c_init_master(i2c_t dev, i2c_speed_t speed);

int i2c_acquire(i2c_t dev);

int i2c_release(i2c_t dev);

int i2c_read_byte(i2c_t dev, uint8_t address, void *data);

int i2c_read_bytes(i2c_t dev, uint8_t address, void *data, int length);

int i2c_read_reg(i2c_t dev, uint8_t address, uint8_t reg, void *data);

int i2c_read_regs(i2c_t dev, uint8_t address, uint8_t reg,
                  void *data, int length);

int i2c_write_byte(i2c_t dev, uint8_t address, uint8_t data);

int i2c_write_bytes(i2c_t dev, uint8_t address, const void *data, int length);

int i2c_write_reg(i2c_t dev, uint8_t address, uint8_t reg, uint8_t data);

int i2c_write_regs(i2c_t dev, uint8_t address, uint8_t reg,
                   const void *data, int length);

void i2c_poweron(i2c_t dev);

void i2c_poweroff(i2c_t dev);

#ifdef __cplusplus
}
#endif

#endif /* PERIPH_I2C_H */