osd-contiki/platform/esb/apps/radio-test.c

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