Contiki 2.6
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00001 /* 00002 * Copyright (c) 2006, Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the Institute nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * This file is part of the Contiki operating system. 00030 * 00031 * $Id: node-id.c,v 1.1 2007/03/23 09:59:08 nifi Exp $ 00032 */ 00033 00034 /** 00035 * \file 00036 * Utility to store a node id in the external flash 00037 * \author 00038 * Adam Dunkels <adam@sics.se> 00039 */ 00040 00041 #include "node-id.h" 00042 #include "contiki-conf.h" 00043 #include "dev/xmem.h" 00044 00045 unsigned short node_id = 0; 00046 00047 /*---------------------------------------------------------------------------*/ 00048 void 00049 node_id_restore(void) 00050 { 00051 unsigned char buf[4]; 00052 xmem_pread(buf, 4, NODE_ID_XMEM_OFFSET); 00053 if(buf[0] == 0xad && 00054 buf[1] == 0xde) { 00055 node_id = (buf[2] << 8) | buf[3]; 00056 } else { 00057 node_id = 0; 00058 } 00059 } 00060 /*---------------------------------------------------------------------------*/ 00061 void 00062 node_id_burn(unsigned short id) 00063 { 00064 unsigned char buf[4]; 00065 buf[0] = 0xad; 00066 buf[1] = 0xde; 00067 buf[2] = id >> 8; 00068 buf[3] = id & 0xff; 00069 xmem_erase(XMEM_ERASE_UNIT_SIZE, NODE_ID_XMEM_OFFSET); 00070 xmem_pwrite(buf, 4, NODE_ID_XMEM_OFFSET); 00071 } 00072 /*---------------------------------------------------------------------------*/