91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/*
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* Copyright (c) 2016, Zolertia - http://www.zolertia.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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* 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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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup zoul-examples
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* @{
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*
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* \defgroup zoul-grove-light-sensor-test Grove's LDR sensor v.1.0 test
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*
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* Demonstrates the operation of the Grove's analog LDR
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* @{
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*
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* \file
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* Grove's LDR sensor example using the ADC sensors wrapper
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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 <stdio.h>
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#include "contiki.h"
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#include "dev/leds.h"
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#include "dev/adc-sensors.h"
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/*---------------------------------------------------------------------------*/
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#define ADC_PIN 5
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#define SENSOR_READ_INTERVAL (CLOCK_SECOND / 4)
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/*---------------------------------------------------------------------------*/
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PROCESS(remote_grove_light_process, "Grove LDR test process");
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AUTOSTART_PROCESSES(&remote_grove_light_process);
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(remote_grove_light_process, ev, data)
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{
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PROCESS_BEGIN();
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uint16_t ldr;
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/* Use pin number not mask, for example if using the PA5 pin then use 5 */
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adc_sensors.configure(ANALOG_GROVE_LIGHT, 5);
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/* And periodically poll the sensor */
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while(1) {
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etimer_set(&et, SENSOR_READ_INTERVAL);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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ldr = adc_sensors.value(ANALOG_GROVE_LIGHT);
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if(ldr != ADC_WRAPPER_ERROR) {
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printf("LDR (resistor) = %u\n", ldr);
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} else {
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printf("Error, enable the DEBUG flag in adc-wrapper.c for info\n");
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PROCESS_EXIT();
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}
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}
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PROCESS_END();
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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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