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44 lines
917 B
C
44 lines
917 B
C
/*
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* Copyright (C) 2018 Gunar Schorcht
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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_esp32
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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 Implementation
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*
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* @author Gunar Schorcht <gunar@schorcht.net>
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*
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* @}
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*/
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#include <string.h>
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#include <stdint.h>
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#include "periph/cpuid.h"
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#include "soc/efuse_reg.h"
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void cpuid_get(void *id)
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{
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/* since ESP32 has two cores, the default MAC address is used as CPU id */
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uint32_t rdata1 = REG_READ(EFUSE_BLK0_RDATA1_REG);
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uint32_t rdata2 = REG_READ(EFUSE_BLK0_RDATA2_REG);
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uint8_t *tmp = id;
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tmp[0] = rdata2 >> 16;
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tmp[1] = rdata2 >> 8;
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tmp[2] = rdata2;
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tmp[3] = rdata1 >> 24;
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tmp[4] = rdata1 >> 16;
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tmp[5] = rdata1 >> 8;
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tmp[6] = rdata1;
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}
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