Objective
The objective of this tutorial is to set up the id of sky motes using Contiki-3.0
Procedure
In the below directory you will find an archive called node-id.c which has two functions referred as node_id_burn and node_id_restore. The former is used to burn an id number to the node, and the latter is used to restore the default id.
/home/YOUR_USER/contiki-3.0/platform/sky
In order to used the functions node_id_burn and node_id_restore you must add following library to your code.
#include "sys/node-id.h"
Then, you must define a unsigned short variable which will store the id. Finally, you must call the function node_id_burn if you want to burn the defined id, or you must call the function node_id_restore if you want to restore the default id. The following code is an implementation that sets the ID equals to 1 for a sky mote; this code is based on the example-broadcast.c archive from the rime stack.
/* * 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 * Testing the broadcast layer in Rime * \author * Adam Dunkels*/ #include "contiki.h" #include "sys/node-id.h" // Include this library in order to be able to set node's ID. #include "net/rime/rime.h" #include "random.h" #include "dev/button-sensor.h" #include "dev/leds.h" #include /*---------------------------------------------------------------------------*/ PROCESS(example_broadcast_process, "Broadcast example"); AUTOSTART_PROCESSES(&example_broadcast_process); /*---------------------------------------------------------------------------*/ static void broadcast_recv(struct broadcast_conn *c, const linkaddr_t *from) { printf("broadcast message received from %d.%d: '%s'\n", from->u8[0], from->u8[1], (char *)packetbuf_dataptr()); } static const struct broadcast_callbacks broadcast_call = {broadcast_recv}; static struct broadcast_conn broadcast; /*---------------------------------------------------------------------------*/ PROCESS_THREAD(example_broadcast_process, ev, data) { static struct etimer et; unsigned short id = 1; // This is the ID which will be set in your sky mote PROCESS_EXITHANDLER(broadcast_close(&broadcast);) PROCESS_BEGIN(); broadcast_open(&broadcast, 129, &broadcast_call); node_id_burn(id); // Call this function to burn the defined id //node_id_restore(); // Call this function to restore the default id while(1) { /* Delay 2-4 seconds */ etimer_set(&et, CLOCK_SECOND * 4 + random_rand() % (CLOCK_SECOND * 4)); PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et)); packetbuf_copyfrom("Hello", 6); broadcast_send(&broadcast); printf("broadcast message sent\n"); } PROCESS_END(); } /*---------------------------------------------------------------------------*/
Compile the code and burn it into a sky mote. When you type the command make login to open a serial connection with the mote, then you will see the lines below, which indicates that the node id is set to 1:
Rime started with address 1.0 MAC 01:00:00:00:00:00:00:00 Contiki 3.0 started. Node id is set to 1. nullsec CSMA ContikiMAC, channel check rate 8 Hz, radio channel 26 Starting 'Broadcast example'