osd-contiki/platform/z1/dev/i2cmaster.h

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 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
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* I2C communication device driver header file for Zolertia Z1 sensor node.
* \author
* Enric Calvo, Zolertia <ecalvo@zolertia.com>
* Marcus Lundén, SICS <mlunden@sics.se>
*/
#ifndef __I2CMASTER_H__
#define __I2CMASTER_H__
#include "contiki.h"
void i2c_enable(void);
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void i2c_disable(void);
void i2c_receiveinit(uint8_t slave_address);
uint8_t i2c_receive_n(uint8_t byte_ctr, uint8_t *rx_buf);
void i2c_transmitinit(uint8_t slave_address);
void i2c_transmit_n(uint8_t byte_ctr, uint8_t *tx_buf);
uint8_t i2c_busy(void);
//XXX Should these defines be in the contiki-conf.h to make it more platform-independent?
#define I2C_PxDIR P5DIR
#define I2C_PxIN P5IN
#define I2C_PxOUT P5OUT
#define I2C_PxSEL P5SEL
#define I2C_PxSEL2 P5SEL2
#define I2C_PxREN P5REN
#define I2C_SDA (1 << 1) //SDA == P5.1
#define I2C_SCL (1 << 2) //SCL == P5.2
#define I2C_PRESC_1KHZ_LSB 0x00
#define I2C_PRESC_1KHZ_MSB 0x20
#define I2C_PRESC_100KHZ_LSB 0x50
#define I2C_PRESC_100KHZ_MSB 0x00
#define I2C_PRESC_400KHZ_LSB 0x14
#define I2C_PRESC_400KHZ_MSB 0x00
// I2C configuration with RX interrupts
#ifdef I2C_CONF_RX_WITH_INTERRUPT
#define I2C_RX_WITH_INTERRUPT I2C_CONF_RX_WITH_INTERRUPT // XXX Move I2C_CONF_RX_WITH_INTERRUPT to contiki-conf.h or platform-conf.h
#else /* I2C_CONF_RX_WITH_INTERRUPT */
#define I2C_RX_WITH_INTERRUPT 1
#endif /* I2C_CONF_RX_WITH_INTERRUPT */
#if 0
#include <stdio.h>
#define PRINTFDEBUG(...) printf(__VA_ARGS__)
#else
#define PRINTFDEBUG(...)
#endif
#endif /* #ifdef __I2CMASTER_H__ */