nes-proj/drivers/platform/zoul/dev/bme280-arch.c

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/*
* Copyright (c) 2015, Zolertia
* 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 copyright holder 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 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.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup zoul-bme280-sensor
* @{
*
* \file
* Architecture-specific I2C for the external BME280 weather sensor
*
* \author
* Antonio Lignan <alinan@zolertia.com>
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "dev/i2c.h"
/*---------------------------------------------------------------------------*/
void
bme280_arch_i2c_init(void)
{
i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
I2C_SCL_NORMAL_BUS_SPEED);
}
/*---------------------------------------------------------------------------*/
void
bme280_arch_i2c_write_mem(uint8_t addr, uint8_t reg, uint8_t value)
{
uint8_t buf[2];
buf[0] = reg;
buf[1] = value;
i2c_master_enable();
i2c_burst_send(addr, buf, 2);
}
/*---------------------------------------------------------------------------*/
void
bme280_arch_i2c_read_mem(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t bytes)
{
i2c_master_enable();
if(i2c_single_send(addr, reg) == I2C_MASTER_ERR_NONE) {
while(i2c_master_busy());
i2c_burst_receive(addr, buf, bytes);
}
}
/*---------------------------------------------------------------------------*/
/**
* @}
*/