73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
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/*
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* Copyright (c) 2006, 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: node-id.c,v 1.1 2007/03/23 09:59:08 nifi Exp $
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*/
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/**
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* \file
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* Utility to store a node id in the external flash
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "node-id.h"
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#include "contiki-conf.h"
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#include "dev/xmem.h"
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unsigned short node_id = 0;
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/*---------------------------------------------------------------------------*/
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void
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node_id_restore(void)
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{
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unsigned char buf[4];
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xmem_pread(buf, 4, NODE_ID_XMEM_OFFSET);
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if(buf[0] == 0xad &&
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buf[1] == 0xde) {
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node_id = (buf[2] << 8) | buf[3];
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} else {
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node_id = 0;
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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node_id_burn(unsigned short id)
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{
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unsigned char buf[4];
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buf[0] = 0xad;
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buf[1] = 0xde;
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buf[2] = id >> 8;
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buf[3] = id & 0xff;
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xmem_erase(XMEM_ERASE_UNIT_SIZE, NODE_ID_XMEM_OFFSET);
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xmem_pwrite(buf, 4, NODE_ID_XMEM_OFFSET);
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}
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/*---------------------------------------------------------------------------*/
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