contiki/platform/micaz/node-id.c

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/*
* Copyright (c) 2009, University of Colombo School of Computing
* 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.
*
* @(#)$$
*/
#include "contiki-conf.h"
#include "sys/node-id.h"
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unsigned short node_id = 0;
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/*---------------------------------------------------------------------------*/
void
node_id_restore(void)
{
uint16_t newid[2];
uint8_t volatile sreg;
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sreg = SREG; /* Save status register before disabling interrupts. */
cli(); /* Disable interrupts. */
eeprom_read(EEPROM_NODE_ID_START, (unsigned char *)newid, sizeof(newid));
node_id = (newid[0] == 0xdead) ? newid[1] : 0;
SREG = sreg; /* Enable interrupts. */
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}
/*---------------------------------------------------------------------------*/
void
node_id_burn(unsigned short id)
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{
uint16_t buffer[2] = { 0xdead, id };
uint8_t volatile sreg;
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sreg = SREG; /* Save status register before disabling interrupts. */
cli(); /* Disable interrupts. */
eeprom_write(EEPROM_NODE_ID_START, (unsigned char *)buffer, sizeof(buffer));
SREG = sreg; /* Enable interrupts. */
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}
/*---------------------------------------------------------------------------*/