Contiki 2.6
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00001 /* 00002 * Copyright (c) 2007, Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the Institute nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * This file is part of the Contiki operating system. 00030 * 00031 * $Id: test-sht11.c,v 1.2 2007/10/22 13:07:00 nvt-se Exp $ 00032 */ 00033 00034 /** 00035 * \file 00036 * Testing the SHT11 sensor. 00037 * \author 00038 * Nicolas Tsiftes <nvt@sics.se> 00039 */ 00040 00041 #include "contiki.h" 00042 #include "dev/sht11.h" 00043 00044 #include <stdio.h> 00045 00046 PROCESS(test_sht11_process, "SHT11 test"); 00047 AUTOSTART_PROCESSES(&test_sht11_process); 00048 00049 PROCESS_THREAD(test_sht11_process, ev, data) 00050 { 00051 static struct etimer et; 00052 static unsigned rh; 00053 00054 PROCESS_BEGIN(); 00055 00056 for (etimer_set(&et, CLOCK_SECOND);; etimer_reset(&et)) { 00057 PROCESS_YIELD(); 00058 printf("Temperature: %u degrees Celsius\n", 00059 (unsigned) (-39.60 + 0.01 * sht11_temp())); 00060 rh = sht11_humidity(); 00061 printf("Rel. humidity: %u%%\n", 00062 (unsigned) (-4 + 0.0405*rh - 2.8e-6*(rh*rh))); 00063 } 00064 00065 PROCESS_END(); 00066 }