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68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* Copyright (C) 2018 RWTH Aachen, Josua Arndt, Steffen Robertz
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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_atmega_common
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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 Steffen Robertz <steffen.robertz@rwth-aachen.de>
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* @author Josua Arndt <jarndt@ias.rwth-aachen.de>
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*
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* @}
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*/
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#include <stdio.h>
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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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#include "atmega_regs_common.h"
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#include "avr/boot.h"
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#define ENABLE_DEBUG (0)
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#include "debug.h"
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/**
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* @brief CPU_ID build from MCU register
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*
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* CPIUD is taken from MCU Control Register and Signature bytes.
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* CPUID: 1e a8 02 1f 94 03 ff ff
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* CPUID: 1e a8 02 1f 94 92 XX XX
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* MEGA62/128/256_RFR2 [MANUAL] p.505
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* MEGA62/128/256_RFR2 [MANUAL] p.138
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* MEGA62/128/256_RFR2 [MANUAL] p.492
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*
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* usr_sign_0/1 are configurable values on flash page 1.
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*/
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void cpuid_get(void *id)
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{
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uint8_t signature_0 = boot_signature_byte_get(0x00);
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uint8_t signature_1 = boot_signature_byte_get(0x02);
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uint8_t signature_2 = boot_signature_byte_get(0x04);
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uint8_t usr_sign_0 = boot_signature_byte_get(0x0100);
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uint8_t usr_sign_1 = boot_signature_byte_get(0x0102);
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uint8_t addr[CPUID_LEN] = {
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signature_0, /* 0x1E Atmel manufacturer ID */
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signature_1, /* 0xA8 Part Number high byte */
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signature_2, /* 0x02 Part Number low byte */
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MAN_ID_0, /* 0x1F Atmel JEDEC manufacturer ID */
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PART_NUM, /* 0x94 PART_NUM Identification */
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VERSION_NUM, /* 0x02 VERSION_NUM Identification */
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/* last two bytes can be set to flash page 1. for differentiation of different boards */
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usr_sign_0, /* user signature 0 */
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usr_sign_1, /* user signature 1 */
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};
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memcpy(id, addr, CPUID_LEN);
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}
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