i2c.h

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/*
 * Copyright (c) 2010, Swedish Institute of Computer Science.
 * All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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
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 */

/**
 * \file
 *         includes for i2c core functions
 * \author
 *         Robert Olsson <robert@radio-sensors.com>
 */

#include "contiki.h"

/* Here we define the i2c address for dev we support */
#define I2C_AT24MAC_ADDR  0xB0 /* EUI64 ADDR */
#define I2C_SHT2X_ADDR    (0x40 << 1) /* SHT2X ADDR */


/* Here we define a enumration for devices */
#define I2C_AT24MAC       (1<<0)
#define I2C_SHT2X         (1<<1)
#define I2C_CO2SA         (1<<2)  /* Sense-Air CO2 */

#define I2C_READ    1
#define I2C_WRITE   0

void i2c_init(uint32_t speed);
uint8_t i2c_start(uint8_t addr);
void i2c_start_wait(uint8_t addr);
void i2c_stop(void);
void i2c_write(uint8_t u8data);
uint8_t i2c_readAck(void);
uint8_t i2c_readNak(void);
uint8_t i2c_getstatus(void);
uint16_t i2c_probe(void);
void i2c_read_mem(uint8_t addr, uint8_t reg, uint8_t buf[], uint8_t bytes);
void i2c_write_mem(uint8_t addr, uint8_t reg, uint8_t value);
void i2c_at24mac_read(char *buf, uint8_t eui64);
extern uint16_t i2c_probed; /* i2c devices we have probed */