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178 lines
5.1 KiB
C
178 lines
5.1 KiB
C
/*
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* Copyright (c) 2009, 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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* This file is part of the Contiki operating system.
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*
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* $Id: announce-blink.c,v 1.3 2010/05/03 22:02:59 nifi Exp $
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*/
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/**
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* \file
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* Example program that displays the number of neighbors on the JCreate LEDs
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "contiki.h"
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#include "contiki-net.h"
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#include "shell.h"
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#include "dev/acc-sensor.h"
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#include "net/mac/xmac.h"
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#include "dev/leds.h"
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#include <stdio.h>
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#define MAX_NEIGHBORS_SEEN 8
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#define NEIGHBOR_TIMEOUT 4 * CLOCK_SECOND
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static struct announcement announcement;
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struct neighbor_entry {
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struct neighbor_entry *next;
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rimeaddr_t addr;
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struct ctimer ctimer;
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};
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LIST(neighbor_table);
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MEMB(neighbor_mem, struct neighbor_entry, MAX_NEIGHBORS_SEEN);
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/*---------------------------------------------------------------------------*/
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PROCESS(announce_blink_process, "Annouce blink");
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AUTOSTART_PROCESSES(&announce_blink_process);
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/*---------------------------------------------------------------------------*/
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/*
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* This function takes the length of the neighbor table list and
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* displays it on the on-board LEDs.
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*/
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static void
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show_leds(void)
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{
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int val, i;
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int num;
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num = list_length(neighbor_table);
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val = 1;
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for(i = 0; i < num; ++i) {
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val |= (val << 1);
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}
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val >>= 1;
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leds_on(val & 0xff);
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leds_off(~(val & 0xff));
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}
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/*---------------------------------------------------------------------------*/
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static void
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remove_neighbor(void *dummy)
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{
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struct neighbor_entry *e = dummy;
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list_remove(neighbor_table, e);
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memb_free(&neighbor_mem, e);
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show_leds();
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printf("%d.%d: removed %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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e->addr.u8[0], e->addr.u8[1]);
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}
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/*---------------------------------------------------------------------------*/
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static void
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received_announcement(struct announcement *a, const rimeaddr_t *from,
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uint16_t id, uint16_t value)
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{
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struct neighbor_entry *e;
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printf("%d.%d: announcement from neighbor %d.%d, id %d, value %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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from->u8[0], from->u8[1],
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id, value);
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for(e = list_head(neighbor_table); e != NULL; e = e->next) {
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if(rimeaddr_cmp(from, &e->addr)) {
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ctimer_set(&e->ctimer, NEIGHBOR_TIMEOUT, remove_neighbor, e);
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show_leds();
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return;
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}
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}
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e = memb_alloc(&neighbor_mem);
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if(e != NULL) {
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rimeaddr_copy(&e->addr, from);
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list_add(neighbor_table, e);
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ctimer_set(&e->ctimer, NEIGHBOR_TIMEOUT, remove_neighbor, e);
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} else {
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}
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show_leds();
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(announce_blink_process, ev, data)
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{
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PROCESS_BEGIN();
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announcement_register(&announcement, 80, received_announcement);
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list_init(neighbor_table);
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memb_init(&neighbor_mem);
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{
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int i;
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for(i = 0; i < 10; ++i) {
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rimeaddr_t r;
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r.u8[0] = r.u8[1] = i;
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received_announcement(NULL, &r, 0, 0);
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received_announcement(NULL, &r, 0, 0);
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}
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}
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SENSORS_ACTIVATE(acc_sensor);
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/* Lower the transmission power for the announcements so that only
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close-range neighbors are noticed. (Makes for a nicer visual
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effect.) */
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xmac_set_announcement_radio_txpower(1);
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while(1) {
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static struct etimer e;
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static uint16_t last_value;
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etimer_set(&e, CLOCK_SECOND / 8);
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PROCESS_WAIT_EVENT();
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if(acc_sensor.value(1) / 256 != last_value) {
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last_value = acc_sensor.value(1) / 256;
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announcement_listen(1);
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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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