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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
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* Copyright (C) 2014-2016 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_sam0_common
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* @ingroup drivers_periph_cpuid
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* @{
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*
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* @file
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* @brief Low-level CPUID driver implementation
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*
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* @author Troels Hoffmeyer <troels.d.hoffmeyer@gmail.com>
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <stdint.h>
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#include <string.h>
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#include "periph/cpuid.h"
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#ifdef CPU_COMMON_SAMD5X
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#define WORD0 (*(volatile uint32_t *)0x008061FC)
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#define WORD1 (*(volatile uint32_t *)0x00806010)
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#define WORD2 (*(volatile uint32_t *)0x00806014)
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#define WORD3 (*(volatile uint32_t *)0x00806018)
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#else
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#define WORD0 (*(volatile uint32_t *)0x0080A00C)
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#define WORD1 (*(volatile uint32_t *)0x0080A040)
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#define WORD2 (*(volatile uint32_t *)0x0080A044)
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#define WORD3 (*(volatile uint32_t *)0x0080A048)
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#endif
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void cpuid_get(void *id)
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{
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/* Use memcpy to prevent unaligned access, which is not supported on
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* cortex-m0+, to id */
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uint32_t addr[] = { WORD0, WORD1, WORD2, WORD3 };
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memcpy(id, &addr[0], CPUID_LEN);
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}
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