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