circuitpython/ports/rp2/usbd.c

45 lines
1.8 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2022 Blake W. Felt & Angus Gratton
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "mp_usbd.h"
#include "string.h"
#include "tusb.h"
#include "pico/unique_id.h"
void mp_usbd_port_get_serial_number(char *serial_buf) {
pico_unique_board_id_t id;
pico_get_unique_board_id(&id);
// convert to hex
int hexlen = sizeof(id.id) * 2;
MP_STATIC_ASSERT(hexlen <= USBD_DESC_STR_MAX);
for (int i = 0; i < hexlen; i += 2) {
static const char *hexdig = "0123456789abcdef";
serial_buf[i] = hexdig[id.id[i / 2] >> 4];
serial_buf[i + 1] = hexdig[id.id[i / 2] & 0x0f];
}
serial_buf[hexlen] = 0;
}