nes-proj/examples/platform-specific/zoul/test-tsl256x.c

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/*
* Copyright (c) 2015, 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-tsl256x-test TSL256X light sensor test (TSL2561/TSL2563)
*
* Demonstrates the use of the TSL256X digital ambient light sensor
* @{
*
* \file
* Test file for the external TSL256X light sensor
*
* \author
* Antonio Lignan <alinan@zolertia.com>
* Toni Lozano <tlozano@zolertia.com>
*/
/*---------------------------------------------------------------------------*/
#include <stdio.h>
#include "contiki.h"
#include "dev/i2c.h"
#include "dev/leds.h"
#include "dev/tsl256x.h"
/*---------------------------------------------------------------------------*/
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/* Default sensor's integration cycle is 402ms */
#define SENSOR_READ_INTERVAL (CLOCK_SECOND)
/*---------------------------------------------------------------------------*/
PROCESS(remote_tsl256x_process, "TSL256X test process");
AUTOSTART_PROCESSES(&remote_tsl256x_process);
/*---------------------------------------------------------------------------*/
static struct etimer et;
/*---------------------------------------------------------------------------*/
void
light_interrupt_callback(uint8_t value)
{
printf("* Light sensor interrupt!\n");
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leds_toggle(LEDS_RED);
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(remote_tsl256x_process, ev, data)
{
PROCESS_BEGIN();
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static uint16_t light;
/* Print the sensor used, teh default is the TSL2561 (from Grove) */
if(TSL256X_REF == TSL2561_SENSOR_REF) {
printf("Light sensor test --> TSL2561\n");
} else if(TSL256X_REF == TSL2563_SENSOR_REF) {
printf("Light sensor test --> TSL2563\n");
} else {
printf("Unknown light sensor reference, aborting\n");
PROCESS_EXIT();
}
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/* Use Contiki's sensor macro to enable the sensor */
SENSORS_ACTIVATE(tsl256x);
/* Default integration time is 402ms with 1x gain, use the below call to
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* change the gain and timming, see tsl2563.h for more options
*/
/* tsl256x.configure(TSL256X_TIMMING_CFG, TSL256X_G16X_402MS); */
/* Register the interrupt handler */
TSL256X_REGISTER_INT(light_interrupt_callback);
/* Enable the interrupt source for values over the threshold. The sensor
* compares against the value of CH0, one way to find out the required
* threshold for a given lux quantity is to enable the DEBUG flag and see
* the CH0 value for a given measurement. The other is to reverse the
* calculations done in the calculate_lux() function. The below value roughly
* represents a 2500 lux threshold, same as pointing a flashlight directly
*/
tsl256x.configure(TSL256X_INT_OVER, 0x15B8);
/* And periodically poll the sensor */
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while(1) {
etimer_set(&et, SENSOR_READ_INTERVAL);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
light = tsl256x.value(TSL256X_VAL_READ);
if(light != TSL256X_ERROR) {
printf("Light = %u\n", (uint16_t)light);
} else {
printf("Error, enable the DEBUG flag in the tsl256x driver for info, ");
printf("or check if the sensor is properly connected\n");
PROCESS_EXIT();
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/