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48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
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* Copyright (C) 2014 Loci Controls Inc.
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup cpu_cc2538
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* @{
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*
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* @file
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* @brief CPU-ID driver implementation
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*
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* The CC2538 provides a 64-bit unique identifier, that is unique for each shipped unit.
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*
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* @author Ian Martin <ian@locicontrols.com>
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*
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* @}
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*/
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#include <string.h>
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#include "cpu.h"
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#include "periph/cpuid.h"
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#define BITS_PER_BYTE 8
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void cpuid_get(void *id)
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{
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uint8_t *dest = (uint8_t *)id;
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/**
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* The byte-order is big-endian but the word order is little endian.
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* Make some sense of it:
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*/
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dest[0] = IEEE_ADDR_MSWORD >> (3 * BITS_PER_BYTE);
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dest[1] = IEEE_ADDR_MSWORD >> (2 * BITS_PER_BYTE);
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dest[2] = IEEE_ADDR_MSWORD >> (1 * BITS_PER_BYTE);
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dest[3] = IEEE_ADDR_MSWORD >> (0 * BITS_PER_BYTE);
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dest[4] = IEEE_ADDR_LSWORD >> (3 * BITS_PER_BYTE);
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dest[5] = IEEE_ADDR_LSWORD >> (2 * BITS_PER_BYTE);
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dest[6] = IEEE_ADDR_LSWORD >> (1 * BITS_PER_BYTE);
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dest[7] = IEEE_ADDR_LSWORD >> (0 * BITS_PER_BYTE);
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}
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/** @} */
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