li2c.h

/*  BSD License
    Copyright (c) 2015 Andrey Chilikin https://github.com/achilikin

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
	this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
	BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/

/**
	Basic Linux I2C wrapper for Raspberry Pi and Intel Edison,
	only write is supported

	For Raspberry Pi make sure that RPi i2c driver is enabled, check following
	files:
	/etc/modprobe.d/raspi-blacklist.conf
	#blacklist i2c-bcm2708
	/etc/modules
	i2c-dev
	/etc/modprobe.d/i2c.conf
	options i2c_bcm2708 baudrate=400000
*/

#ifndef DISABLE_I2C

#ifndef __LI2C_H__
#define __LI2C_H__

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define PI2C_BUS0 0 /*< P5 header I2C bus */
#define PI2C_BUS1 1 /*< P1 header I2C bus */
#define PI2C_MAX_BUS PI2C_BUS1

#define EDI2C_BUS1 1
#define EDI2C_BUS6 6
#define EDI2C_MAX_BUS EDI2C_BUS6

#define LI2C_MAX_BUS 8

typedef enum li2c_mode { LI2C_RPI, LI2C_EDISON } li2c_mode_t;

int li2c_init(li2c_mode_t mode);  /*< init I2C bus  */
int li2c_open(uint8_t bus);  /*< open I2C bus  */
int li2c_close(uint8_t bus); /*< close I2C bus */
int li2c_select(uint8_t bus, uint8_t slave); /*< select I2C slave */
int li2c_write(uint8_t bus, const uint8_t *data, uint32_t len);

#ifdef __cplusplus
}
#endif

#endif

#endif