93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
/*
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* Copyright (c) 2013, Texas Instruments Incorporated - http://www.ti.com/
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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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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-ieee-addr
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* @{
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*
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* \file
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* Driver for the cc2538 IEEE addresses
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*/
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#include "contiki-conf.h"
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#include "net/linkaddr.h"
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#include "ieee-addr.h"
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#include <stdint.h>
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#include <string.h>
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/*---------------------------------------------------------------------------*/
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void
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ieee_addr_cpy_to(uint8_t *dst, uint8_t len)
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{
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if(IEEE_ADDR_CONF_HARDCODED) {
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uint8_t ieee_addr_hc[8] = IEEE_ADDR_CONF_ADDRESS;
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memcpy(dst, &ieee_addr_hc[8 - len], len);
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} else {
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/*
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* By default, we assume that the IEEE address is stored on flash using
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* little-endian byte order.
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*
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* However, some SoCs ship with a different byte order, whereby the first
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* four bytes are flipped with the four last ones.
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*
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* Using this address as an example: 00 12 4B 00 01 02 03 04
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* We expect it stored as: 04 03 02 01 00 4B 12 00
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* But it is also possible to encounter: 00 4B 12 00 04 03 02 01
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*
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* Thus: read locations [3, 2, 1] and if we encounter the TI OUI, flip the
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* order of the two 4-byte sequences. Each of the 4-byte sequences is still
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* little-endian.
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*/
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int i;
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uint8_t oui_ti[3] = IEEE_ADDR_OUI_TI;
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if(((uint8_t *)IEEE_ADDR_LOCATION)[3] == oui_ti[0]
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&& ((uint8_t *)IEEE_ADDR_LOCATION)[2] == oui_ti[1]
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&& ((uint8_t *)IEEE_ADDR_LOCATION)[1] == oui_ti[2]) {
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for(i = 0; i < len / 2; i++) {
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dst[i] = ((uint8_t *)IEEE_ADDR_LOCATION)[len / 2 - 1 - i];
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}
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for(i = 0; i < len / 2; i++) {
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dst[i + len / 2] = ((uint8_t *)IEEE_ADDR_LOCATION)[len - 1 - i];
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}
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} else {
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for(i = 0; i < len; i++) {
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dst[i] = ((uint8_t *)IEEE_ADDR_LOCATION)[len - 1 - i];
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}
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}
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}
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#if IEEE_ADDR_NODE_ID
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dst[len - 1] = IEEE_ADDR_NODE_ID & 0xFF;
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dst[len - 2] = IEEE_ADDR_NODE_ID >> 8;
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#endif
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}
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/** @} */
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