80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/*
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* Copyright (c) 2015, Zolertia
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup zoul-bme280-sensor
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* \ingroup zoul
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*
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* @{
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*
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* \file
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* Architecture-specific I2C for the external BME280 weather sensor
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*
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* \author
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* Antonio Lignan <alinan@zolertia.com>
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "dev/i2c.h"
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/*---------------------------------------------------------------------------*/
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void
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bme280_arch_i2c_init(void)
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{
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i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
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I2C_SCL_NORMAL_BUS_SPEED);
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}
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/*---------------------------------------------------------------------------*/
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void
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bme280_arch_i2c_write_mem(uint8_t addr, uint8_t reg, uint8_t value)
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{
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uint8_t buf[2];
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buf[0] = reg;
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buf[1] = value;
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i2c_master_enable();
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i2c_burst_send(addr, buf, 2);
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}
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/*---------------------------------------------------------------------------*/
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void
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bme280_arch_i2c_read_mem(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t bytes)
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{
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i2c_master_enable();
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if(i2c_single_send(addr, reg) == I2C_MASTER_ERR_NONE) {
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while(i2c_master_busy());
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i2c_burst_receive(addr, buf, bytes);
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}
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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*/
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