a2919a6fb2
On my hardware, esptool reports
MAC: 7c:df:a1:02:6c:b8
after this change, the USB descriptor says SerialNumber: 7CDFA1026CB8
and microcontroller.cpu.id has
>>> "".join("%02x" % byte for byte in microcontroller.cpu.uid)
'c7fd1a20c68b'
Note that the nibble-swapping between USB and cpu.uid is typical.
For instance, an stm32 board has USB SerialNumber
24002500F005D42445632302 but hex-converted microcontroller.cpu.id
420052000f504d4254363220.
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Dan Halbert for Adafruit Industries
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* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <math.h>
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#include <string.h>
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#include "common-hal/microcontroller/Processor.h"
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#include "py/runtime.h"
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#include "supervisor/shared/translate.h"
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#include "soc/efuse_reg.h"
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float common_hal_mcu_processor_get_temperature(void) {
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return NAN;
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}
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float common_hal_mcu_processor_get_voltage(void) {
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return NAN;
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}
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uint32_t common_hal_mcu_processor_get_frequency(void) {
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return 0;
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}
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STATIC uint8_t swap_nibbles(uint8_t v) {
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return ((v << 4) | (v >> 4)) & 0xff;
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}
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void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
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memset(raw_id, 0, COMMON_HAL_MCU_PROCESSOR_UID_LENGTH);
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uint8_t *ptr = &raw_id[COMMON_HAL_MCU_PROCESSOR_UID_LENGTH-1];
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// MAC address contains 48 bits (6 bytes), 32 in the low order word
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uint32_t mac_address_part = REG_READ(EFUSE_RD_MAC_SPI_SYS_0_REG);
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*ptr-- = swap_nibbles(mac_address_part & 0xff); mac_address_part >>= 8;
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*ptr-- = swap_nibbles(mac_address_part & 0xff); mac_address_part >>= 8;
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*ptr-- = swap_nibbles(mac_address_part & 0xff); mac_address_part >>= 8;
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*ptr-- = swap_nibbles(mac_address_part & 0xff);
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// and 16 in the high order word
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mac_address_part = REG_READ(EFUSE_RD_MAC_SPI_SYS_1_REG);
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*ptr-- = swap_nibbles(mac_address_part & 0xff); mac_address_part >>= 8;
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*ptr-- = swap_nibbles(mac_address_part & 0xff);
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}
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