contiki/cpu/cc26xx-cc13xx/ieee-addr.c

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2015-02-25 12:09:56 +00:00
/*
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
* 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 copyright holder 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 COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup cc26xx-ieee-addr
* @{
*
* \file
* Driver for the CC13xx/CC26xx IEEE addresses
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*/
/*---------------------------------------------------------------------------*/
#include "contiki-conf.h"
#include "net/linkaddr.h"
#include "ieee-addr.h"
#include <stdint.h>
#include <string.h>
/*---------------------------------------------------------------------------*/
void
ieee_addr_cpy_to(uint8_t *dst, uint8_t len)
{
if(IEEE_ADDR_CONF_HARDCODED) {
uint8_t ieee_addr_hc[8] = IEEE_ADDR_CONF_ADDRESS;
memcpy(dst, &ieee_addr_hc[8 - len], len);
} else {
int i;
/* Reading from primary location... */
uint8_t *location = (uint8_t *)IEEE_ADDR_LOCATION_PRIMARY;
/*
* ...unless we can find a byte != 0xFF in secondary
*
* Intentionally checking all 8 bytes here instead of len, because we
* are checking validity of the entire IEEE address irrespective of the
* actual number of bytes the caller wants to copy over.
*/
for(i = 0; i < 8; i++) {
if(((uint8_t *)IEEE_ADDR_LOCATION_SECONDARY)[i] != 0xFF) {
/* A byte in the secondary location is not 0xFF. Use the secondary */
location = (uint8_t *)IEEE_ADDR_LOCATION_SECONDARY;
break;
}
}
/*
* We have chosen what address to read the IEEE address from. Do so,
* inverting byte order
*/
for(i = 0; i < len; i++) {
dst[i] = location[len - 1 - i];
}
}
#if IEEE_ADDR_NODE_ID
dst[len - 1] = IEEE_ADDR_NODE_ID & 0xFF;
dst[len - 2] = IEEE_ADDR_NODE_ID >> 8;
#endif
}
/*---------------------------------------------------------------------------*/
/** @} */