nes-proj/backyard/platform/sky/udpsend.c

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/*
* Copyright (c) 2005, 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.
*
* @(#)$Id: udpsend.c,v 1.2 2010/10/19 18:29:04 adamdunkels Exp $
*/
/* Set the IP destination address to something different from the
* broadcast address. Use commas (",") rather than the normal dots
* (".") in addresses.
*/
#include <stdio.h>
#include <string.h>
#include "contiki.h"
#include "net/uip.h"
#include "dev/leds.h"
#include "dev/light.h"
PROCESS(udpsend_process, "UDP send process");
PROCESS_THREAD(udpsend_process, ev, data)
{
static struct etimer etimer;
static struct uip_udp_conn *c;
PROCESS_EXITHANDLER(goto exit);
PROCESS_BEGIN();
printf("udpsend_process starting\n");
{
uip_ipaddr_t addr;
uip_ipaddr(&addr, 255,255,255,255); /* Change address here! */
c = udp_new(&addr, UIP_HTONS(4321), NULL);
c->ttl = 1; /* One hop only. */
}
while(1) {
etimer_set(&etimer, CLOCK_SECOND);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&etimer));
tcpip_poll_udp(c);
PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
char buf[64];
sprintf(buf, "light sensors %d %d", sensors_light1(), sensors_light2());
uip_send(buf, strlen(buf) + 1);
}
exit:
/* Contiki does automatic garbage collection of uIP state and we
* need not worry about that. */
printf("udpsend_process exiting\n");
PROCESS_END();
}
/*
* Initialize this kernel module.
*/
void
_init(void)
{
process_start(&udpsend_process, NULL);
}
/*
* When this module is unloaded we must clean up!
*/
void
_fini(void)
{
process_exit(&udpsend_process);
}