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added example of ext-sensor for Jcreate

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joxe 2010-02-13 12:21:31 +00:00
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examples/jcreate/example-ext-sensor.c Normal file
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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* 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.
*
* This file is part of the Contiki operating system.
*
* $Id: example-ext-sensor.c,v 1.1 2010/02/13 12:21:31 joxe Exp $
*/
/**
* \file
* A very simple Contiki application showing how to use ext-sensor
* In this case a i-Snail current sensor for 10A is used to measure
* current.
* \author
* Joakim Eriksson <joakime@sics.se>
*/
#include "contiki.h"
#include "dev/leds.h"
#include "dev/ext-sensor.h"
#include <stdio.h>
/*---------------------------------------------------------------------------*/
PROCESS(ext_sensor_process, "ext-sensor process");
AUTOSTART_PROCESSES(&ext_sensor_process);
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(ext_sensor_process, ev, data)
{
static struct etimer et;
static long maValue;
static long maSum;
static int time;
PROCESS_BEGIN();
/* The Sentilla JCreate has 8 LEDs, and we need to set the ports
correctly. */
LEDS_PxDIR = 0xff;
LEDS_PxOUT = 0xff;
SENSORS_ACTIVATE(ext_sensor);
leds_invert(LEDS_ALL);
etimer_set(&et, CLOCK_SECOND);
while(1) {
leds_invert(LEDS_ALL);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
etimer_reset(&et);
leds_invert(LEDS_ALL);
/* the max value of the i-Snail sensor is 10 Ampere (=> ~5V) */
/* and we are using the 2.5 V reference voltage which */
/* means that 5 Ampere will make the sensor max-out. */
/* => 5 Ampere will be 4095 in the sensor ADC register */
maValue = (ext_sensor.value(ADC0) * 5000L) / 4095;
maSum += maValue;
time++;
printf("Measured ext1 %d %ld mA %ld W %ld Wh %d (s)\n",
ext_sensor.value(ADC0), maValue, (maValue * 230L) / 1000,
(maSum * 230L) / (1000L * 60 * 60), time);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/