104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/*
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* Copyright (c) 2007, 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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*/
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/**
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* \file
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* A quick program for testing the tmp102 driver
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* \author
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* Enric Calvo <ecalvo@zolertia.com>
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*/
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#include <stdio.h>
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#include "contiki.h"
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#include "dev/i2cmaster.h"
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#include "dev/tmp102.h"
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#if 1
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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#if 0
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#define PRINTFDEBUG(...) printf(__VA_ARGS__)
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#else
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#define PRINTFDEBUG(...)
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#endif
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#define TMP102_READ_INTERVAL (CLOCK_SECOND/2)
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PROCESS (temp_process, "Test Temperature process");
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AUTOSTART_PROCESSES (&temp_process);
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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PROCESS_THREAD (temp_process, ev, data)
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{
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PROCESS_BEGIN ();
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{
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int16_t tempint;
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uint16_t tempfrac;
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int16_t raw;
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uint16_t absraw;
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int16_t sign;
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char minus = ' ';
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tmp102_init();
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while (1)
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{
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etimer_set(&et, TMP102_READ_INTERVAL);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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sign = 1;
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PRINTFDEBUG ("Reading Temp...\n");
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raw = tmp102_read_temp_raw();
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absraw = raw;
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if (raw < 0) { // Perform 2C's if sensor returned negative data
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absraw = (raw ^ 0xFFFF) + 1;
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sign = -1;
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}
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tempint = (absraw >> 8) * sign;
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tempfrac = ((absraw>>4) % 16) * 625; // Info in 1/10000 of degree
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minus = ((tempint == 0) & (sign == -1)) ? '-' : ' ' ;
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PRINTF ("Temp = %c%d.%04d\n", minus, tempint, tempfrac);
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}
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}
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PROCESS_END ();
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}
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