156 lines
4.7 KiB
C
156 lines
4.7 KiB
C
/*
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* Copyright (c) 2006, 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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* $Id: radio-test.c,v 1.1 2006/06/18 07:48:48 adamdunkels Exp $
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*
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* -----------------------------------------------------------------
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*
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* Author : Adam Dunkels, Joakim Eriksson, Niclas Finne
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* Created : 2006-03-07
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* Updated : $Date: 2006/06/18 07:48:48 $
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* $Revision: 1.1 $
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*
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* Simple application to indicate connectivity between two nodes:
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*
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* - Red led indicates a packet sent via radio (one packet sent each second)
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* - Yellow led indicates that this node can hear the other node but not
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* necessary vice versa (unidirectional communication).
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* - Green led indicates that both nodes can communicate with each
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* other (bidirectional communication)
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*/
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#include "contiki-esb.h"
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#include <string.h>
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PROCESS(radio_test_process, "Radio test");
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AUTOSTART_PROCESSES(&radio_test_process);
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#define ON 1
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#define OFF 0
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#define HEADER "RTST"
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#define PACKET_SIZE 20
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#define PORT 2345
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struct indicator {
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int onoff;
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int led;
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clock_time_t interval;
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struct etimer timer;
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};
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/*---------------------------------------------------------------------*/
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static void
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set(struct indicator *indicator, int onoff) {
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if(indicator->onoff ^ onoff) {
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indicator->onoff = onoff;
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if(onoff) {
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leds_on(indicator->led);
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} else {
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leds_off(indicator->led);
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}
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}
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if(onoff) {
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etimer_set(&indicator->timer, indicator->interval);
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}
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}
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/*---------------------------------------------------------------------*/
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PROCESS_THREAD(radio_test_process, ev, data)
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{
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static struct etimer send_timer;
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static struct uip_udp_conn *conn;
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static struct indicator recv, other, flash;
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PROCESS_BEGIN();
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/* Initialize the indicators */
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recv.onoff = other.onoff = flash.onoff = OFF;
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recv.interval = other.interval = CLOCK_SECOND;
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flash.interval = 1;
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recv.led = LEDS_YELLOW;
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other.led = LEDS_GREEN;
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flash.led = LEDS_RED;
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conn = udp_broadcast_new(HTONS(PORT), NULL);
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etimer_set(&send_timer, CLOCK_SECOND);
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while(1) {
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PROCESS_WAIT_EVENT();
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if(ev == PROCESS_EVENT_TIMER) {
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if(data == &send_timer) {
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etimer_reset(&send_timer);
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tcpip_poll_udp(conn);
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} else if(data == &other.timer) {
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set(&other, OFF);
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} else if(data == &recv.timer) {
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set(&recv, OFF);
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} else if(data == &flash.timer) {
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set(&flash, OFF);
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}
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} else if(ev == tcpip_event) {
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if(uip_poll()) {
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/* send packet */
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memcpy(uip_sappdata, HEADER, sizeof(HEADER));
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((char *)uip_sappdata)[sizeof(HEADER)] = recv.onoff;
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/* send arbitrary data to fill the packet size */
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uip_send(uip_sappdata, PACKET_SIZE);
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set(&flash, ON);
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}
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if(uip_newdata()) {
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/* packet received */
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if(uip_datalen() < PACKET_SIZE
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|| strncmp((char *)uip_appdata, HEADER, sizeof(HEADER))) {
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/* invalid message */
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leds_blink();
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} else {
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set(&recv, ON);
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set(&other, ((char *)uip_appdata)[sizeof(HEADER)] ? ON : OFF);
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/* synchronize the sending to keep the nodes from sending
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simultaneously */
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etimer_set(&send_timer, CLOCK_SECOND);
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etimer_adjust(&send_timer, - (int) (CLOCK_SECOND >> 1));
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beep();
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}
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------*/
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