96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
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* Copyright (c) 2013, ADVANSEE - http://www.advansee.com/
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* Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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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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* \addtogroup cc2538dk-als-sensor
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* @{
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*
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* \file
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* Driver for the SmartRF06EB ALS
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*/
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#include "contiki.h"
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#include "sys/clock.h"
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#include "dev/ioc.h"
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#include "dev/gpio.h"
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#include "dev/adc.h"
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#include "dev/als-sensor.h"
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#include <stdint.h>
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#define ADC_ALS_PWR_PORT_BASE GPIO_PORT_TO_BASE(ADC_ALS_PWR_PORT)
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#define ADC_ALS_PWR_PIN_MASK GPIO_PIN_MASK(ADC_ALS_PWR_PIN)
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#define ADC_ALS_OUT_PIN_MASK GPIO_PIN_MASK(ADC_ALS_OUT_PIN)
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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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uint8_t channel = SOC_ADC_ADCCON_CH_AIN0 + ADC_ALS_OUT_PIN;
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int16_t res;
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GPIO_SET_PIN(ADC_ALS_PWR_PORT_BASE, ADC_ALS_PWR_PIN_MASK);
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clock_delay_usec(2000);
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res = adc_get(channel, SOC_ADC_ADCCON_REF_INT, SOC_ADC_ADCCON_DIV_512);
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GPIO_CLR_PIN(ADC_ALS_PWR_PORT_BASE, ADC_ALS_PWR_PIN_MASK);
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return res;
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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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switch(type) {
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case SENSORS_HW_INIT:
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GPIO_SOFTWARE_CONTROL(ADC_ALS_PWR_PORT_BASE, ADC_ALS_PWR_PIN_MASK);
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GPIO_SET_OUTPUT(ADC_ALS_PWR_PORT_BASE, ADC_ALS_PWR_PIN_MASK);
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GPIO_CLR_PIN(ADC_ALS_PWR_PORT_BASE, ADC_ALS_PWR_PIN_MASK);
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ioc_set_over(ADC_ALS_PWR_PORT, ADC_ALS_PWR_PIN, IOC_OVERRIDE_DIS);
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GPIO_SOFTWARE_CONTROL(GPIO_A_BASE, ADC_ALS_OUT_PIN_MASK);
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GPIO_SET_INPUT(GPIO_A_BASE, ADC_ALS_OUT_PIN_MASK);
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ioc_set_over(GPIO_A_NUM, ADC_ALS_OUT_PIN, IOC_OVERRIDE_ANA);
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break;
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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(als_sensor, ALS_SENSOR, value, configure, status);
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/** @} */
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