88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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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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* This file is part of the Contiki operating system.
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*
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* $Id: example-ext-sensor.c,v 1.2 2010/05/03 22:02:59 nifi Exp $
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*/
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/**
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* \file
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* A very simple Contiki application showing how to use ext-sensor
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* In this case a i-Snail current sensor for 10A is used to measure
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* current.
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* \author
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* Joakim Eriksson <joakime@sics.se>
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*/
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#include "contiki.h"
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#include "dev/leds.h"
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#include "dev/ext-sensor.h"
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#include <stdio.h>
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/*---------------------------------------------------------------------------*/
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PROCESS(ext_sensor_process, "ext-sensor process");
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AUTOSTART_PROCESSES(&ext_sensor_process);
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(ext_sensor_process, ev, data)
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{
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static struct etimer et;
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static long maValue;
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static long maSum;
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static int time;
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PROCESS_BEGIN();
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SENSORS_ACTIVATE(ext_sensor);
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leds_invert(LEDS_ALL);
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etimer_set(&et, CLOCK_SECOND);
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while(1) {
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leds_invert(LEDS_ALL);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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etimer_reset(&et);
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leds_invert(LEDS_ALL);
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/* the max value of the i-Snail sensor is 10 Ampere (=> ~5V) */
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/* and we are using the 2.5 V reference voltage which */
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/* means that 5 Ampere will make the sensor max-out. */
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/* => 5 Ampere will be 4095 in the sensor ADC register */
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maValue = (ext_sensor.value(ADC0) * 5000L) / 4095;
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maSum += maValue;
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time++;
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printf("Measured ext1 %d %ld mA %ld W %ld Wh %d (s)\n",
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ext_sensor.value(ADC0), maValue, (maValue * 230L) / 1000,
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(maSum * 230L) / (1000L * 60 * 60), time);
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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