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