79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/*
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* Copyright (c) 2015, Copyright Robert Olsson
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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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*
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* Author : Robert Olsson rolss@kth.se/robert@radio-sensors.com
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* Created : 2016-09-14
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*/
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#include "contiki.h"
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#include "lib/sensors.h"
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#include "dev/bme280/bme280.h"
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#include "dev/bme280/bme280-sensor.h"
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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/* Read all measurements with one burst read */
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bme280_read(BME280_MODE_WEATHER);
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/* Return a la Contiki API */
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switch(type) {
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case BME280_SENSOR_TEMP:
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return bme280_mea.t_overscale100 / 100;
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case BME280_SENSOR_HUMIDITY:
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return bme280_mea.h_overscale1024 >> 10;
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case BME280_SENSOR_PRESSURE:
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/* Scale down w. 10 not to overslow the signed int */
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#ifdef BME280_64BIT
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return bme280_mea.p_overscale256 / (256 * 10);
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#else
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return bme280_mea.p / 10;
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#endif
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int c)
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{
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return bme280_init(BME280_MODE_WEATHER);
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(bme280_sensor, "bme280", value, configure, status);
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