nes-proj/examples/platform-specific/zoul/test-grove-light-sensor.c

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/*
* Copyright (c) 2016, Zolertia - http://www.zolertia.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup zoul-examples
* @{
*
* \defgroup zoul-grove-light-sensor-test Grove's LDR sensor v.1.0 test
*
* Demonstrates the operation of the Grove's analog LDR
* @{
*
* \file
* Grove's LDR sensor example using the ADC sensors wrapper
*
* \author
* Antonio Lignan <alinan@zolertia.com>
*/
/*---------------------------------------------------------------------------*/
#include <stdio.h>
#include "contiki.h"
#include "dev/leds.h"
#include "dev/adc-sensors.h"
/*---------------------------------------------------------------------------*/
#define ADC_PIN 5
#define SENSOR_READ_INTERVAL (CLOCK_SECOND / 4)
/*---------------------------------------------------------------------------*/
PROCESS(remote_grove_light_process, "Grove LDR test process");
AUTOSTART_PROCESSES(&remote_grove_light_process);
/*---------------------------------------------------------------------------*/
static struct etimer et;
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(remote_grove_light_process, ev, data)
{
PROCESS_BEGIN();
uint16_t ldr;
/* Use pin number not mask, for example if using the PA5 pin then use 5 */
adc_sensors.configure(ANALOG_GROVE_LIGHT, 5);
/* And periodically poll the sensor */
while(1) {
etimer_set(&et, SENSOR_READ_INTERVAL);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
ldr = adc_sensors.value(ANALOG_GROVE_LIGHT);
if(ldr != ADC_WRAPPER_ERROR) {
printf("LDR (resistor) = %u\n", ldr);
} else {
printf("Error, enable the DEBUG flag in adc-wrapper.c for info\n");
PROCESS_EXIT();
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/