contiki/examples/z1/tutorials/example-unicast-temp.c

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/*
* 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.
*
*/
/**
* \file
* Best-effort single-hop unicast example
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
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#include "net/rime/rime.h"
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#include "dev/button-sensor.h"
#include "dev/leds.h"
#include <stdio.h>
#include "dev/i2cmaster.h"
#include "dev/tmp102.h"
#if 1
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#define SENDER 205
#define RECEIVER 200
#define PRINTFDEBUG(...)
#define TMP102_READ_INTERVAL (CLOCK_SECOND/2)
int16_t tempint;
uint16_t tempfrac;
int16_t raw;
uint16_t absraw;
int16_t sign;
char minus = ' ';
/*---------------------------------------------------------------------------*/
PROCESS(example_unicast_process, "Example unicast");
AUTOSTART_PROCESSES(&example_unicast_process);
/*---------------------------------------------------------------------------*/
static void
recv_uc(struct unicast_conn *c, const linkaddr_t *from)
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{
printf("unicast message received from %d.%d\n",
from->u8[0], from->u8[1]);
}
static const struct unicast_callbacks unicast_callbacks = {recv_uc};
static struct unicast_conn uc;
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(example_unicast_process, ev, data)
{
PROCESS_EXITHANDLER(unicast_close(&uc);)
PROCESS_BEGIN();
tmp102_init();
linkaddr_t addr;
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unicast_open(&uc, 133, &unicast_callbacks);
SENSORS_ACTIVATE(button_sensor);
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev==sensors_event && data == &button_sensor);
sign = 1;
//PRINTFDEBUG ("Reading Temp...\n");
raw = tmp102_read_temp_raw();
absraw = raw;
if (raw < 0) { // Perform 2C's if sensor returned negative data
absraw = (raw ^ 0xFFFF) + 1;
sign = -1;
}
tempint = (absraw >> 8) * sign;
tempfrac = ((absraw>>4) % 16) * 625; // Info in 1/10000 of degree
minus = ((tempint == 0) & (sign == -1)) ? '-' : ' ' ;
PRINTF ("Current Temp = %c%d.%04d\n", minus, tempint, tempfrac);
char s[30];
sprintf(s,"Temp is %c%d.%04d\n", minus, tempint, tempfrac);
printf("sending %s\n",s);
packetbuf_copyfrom(s, 30);
addr.u8[0] = RECEIVER;
addr.u8[1] = 0;
unicast_send(&uc, &addr);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/