33 lines
926 B
C
33 lines
926 B
C
/**
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* Copyright (c) 2021 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "pico/unique_id.h"
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// RP2040 does not have a unique on-board ID, but this is a standard feature
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// on the NOR flash it boots from. There is a 1:1 association between RP2040
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// and the flash, so this can be used to get a 64 bit globally unique board ID
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// for an RP2040-based board, including Pico.
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//
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// The pico_unique_id library retrieves this unique identifier during boot and
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// stores it in memory, where it can be accessed at any time without
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// disturbing the flash XIP hardware.
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int main() {
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stdio_init_all();
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pico_unique_board_id_t board_id;
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pico_get_unique_board_id(&board_id);
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printf("Unique identifier:");
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for (int i = 0; i < PICO_UNIQUE_BOARD_ID_SIZE_BYTES; ++i) {
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printf(" %02x", board_id.id[i]);
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}
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printf("\n");
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}
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