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

/*
 * 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"
#include "net/rime/rime.h"

#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)
{
  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;
  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();
}
/*---------------------------------------------------------------------------*/