contiki/platform/msb430/apps/test-sht11.c

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2007-10-22 13:05:30 +00:00
/*
* Copyright (c) 2007, 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.
*
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* $Id: test-sht11.c,v 1.2 2007/10/22 13:07:00 nvt-se Exp $
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*/
/**
* \file
* Testing the SHT11 sensor.
* \author
* Nicolas Tsiftes <nvt@sics.se>
*/
#include "contiki.h"
#include "dev/sht11.h"
#include <stdio.h>
PROCESS(test_sht11_process, "SHT11 test");
AUTOSTART_PROCESSES(&test_sht11_process);
PROCESS_THREAD(test_sht11_process, ev, data)
{
static struct etimer et;
static unsigned rh;
PROCESS_BEGIN();
for (etimer_set(&et, CLOCK_SECOND);; etimer_reset(&et)) {
PROCESS_YIELD();
printf("Temperature: %u degrees Celsius\n",
(unsigned) (-39.60 + 0.01 * sht11_temp()));
rh = sht11_humidity();
printf("Rel. humidity: %u%%\n",
(unsigned) (-4 + 0.0405*rh - 2.8e-6*(rh*rh)));
}
PROCESS_END();
}