78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
/*
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* Copyright (c) 2015, Zolertia - http://www.zolertia.com
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* Copyright (c) 2015, University of Bristol - http://www.bristol.ac.uk
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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 cc2538-temp-sensor
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* @{
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*
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* \file
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* Driver for the CC2538 On-Chip temperature sensor
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*/
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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/adc.h"
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#include "dev/cc2538-sensors.h"
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#include <stdint.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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int raw = adc_get(SOC_ADC_ADCCON_CH_TEMP, SOC_ADC_ADCCON_REF_INT,
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SOC_ADC_ADCCON_DIV_512);
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if(type == CC2538_SENSORS_VALUE_TYPE_RAW) {
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return raw;
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} else if(type == CC2538_SENSORS_VALUE_TYPE_CONVERTED) {
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return 25000 + ((raw >> 4) - 1422) * 10000 / 42;
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}
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return CC2538_SENSORS_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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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 1;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(cc2538_temp_sensor, TEMP_SENSOR, value, configure, status);
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/*---------------------------------------------------------------------------*/
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/** @} */
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