Contiki-NG
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node-id-z1.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 */
32
33/**
34 * \file
35 * Utility to store a node id in the external flash
36 * \author
37 * Adam Dunkels <adam@sics.se>
38 */
39
40#include "contiki.h"
41#include "sys/node-id.h"
42#include "dev/xmem.h"
43#include <string.h>
44
45unsigned char node_mac[8];
46
47/*---------------------------------------------------------------------------*/
48void
49node_id_z1_restore(void)
50{
51 unsigned char buf[12];
52 xmem_pread(buf, 12, NODE_ID_XMEM_OFFSET);
53 if(buf[0] == 0xad &&
54 buf[1] == 0xde) {
55 node_id = (buf[2] << 8) | buf[3];
56 memcpy(node_mac, &buf[4], 8);
57 } else {
58 node_id = 0;
59 }
60}
61/*---------------------------------------------------------------------------*/
62void
63node_id_z1_burn(unsigned short id)
64{
65 unsigned char buf[12];
66 memset(buf, 0, sizeof(buf));
67 buf[0] = 0xad;
68 buf[1] = 0xde;
69 buf[2] = id >> 8;
70 buf[3] = id & 0xff;
71 xmem_erase(XMEM_ERASE_UNIT_SIZE, NODE_ID_XMEM_OFFSET);
72 xmem_pwrite(buf, 12, NODE_ID_XMEM_OFFSET);
73}
74/*---------------------------------------------------------------------------*/
int xmem_erase(long size, unsigned long addr)
Erase a sector in the flash memory.
Definition xmem.c:128
int xmem_pwrite(const void *_buf, int size, unsigned long addr)
Definition xmem.c:94
int xmem_pread(void *_p, int size, unsigned long addr)
Read a number of bytes from an offset in the external memory.
Definition xmem.c:64
Node-id (simple 16-bit identifiers) handling.
Header file to the external flash memory (XMem) API.