Contiki 2.5
node-id.c
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1 /*
2  * Copyright (c) 2006, Swedish Institute of Computer Science.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * This file is part of the Contiki operating system.
30  *
31  * $Id: node-id.c,v 1.1 2006/10/06 07:47:02 adamdunkels Exp $
32  */
33 
34 /**
35  * \file
36  * A brief description of what this file is.
37  * \author
38  * Adam Dunkels <adam@sics.se>
39  */
40 
41 #include "node-id.h"
42 #include "contiki-conf.h"
43 #include "dev/eeprom.h"
44 
45 unsigned short node_id = 0;
46 /*---------------------------------------------------------------------------*/
47 void
48 node_id_restore(void)
49 {
50  unsigned char buf[2];
51  eeprom_read(NODE_ID_EEPROM_OFFSET, buf, 2);
52  if(buf[0] == 0xad &&
53  buf[1] == 0xde) {
54  eeprom_read(NODE_ID_EEPROM_OFFSET + 2, buf, 2);
55  node_id = (buf[0] << 8) | buf[1];
56  } else {
57  node_id = 0;
58  }
59 }
60 /*---------------------------------------------------------------------------*/
61 void
62 node_id_burn(unsigned short id)
63 {
64  unsigned char buf[2];
65  buf[0] = 0xad;
66  buf[1] = 0xde;
67  eeprom_write(NODE_ID_EEPROM_OFFSET, buf, 2);
68  buf[0] = id >> 8;
69  buf[1] = id & 0xff;
70  eeprom_write(NODE_ID_EEPROM_OFFSET + 2, buf, 2);
71 }
72 /*---------------------------------------------------------------------------*/