qmk_firmware

QMK firmware for my keyboards (Corne, Sweep Ferris) and trackball (Ploopy Adept)
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hardware_id.c (581B)

      1 // Copyright 2022 QMK
      2 // SPDX-License-Identifier: GPL-2.0-or-later
      3 
      4 // For some reason this bit is undocumented for some AVR parts and not defined in their avr-libc IO headers
      5 // See https://stackoverflow.com/questions/12350914/how-to-read-atmega-32-signature-row
      6 #ifndef SIGRD
      7 #    define SIGRD 5
      8 #endif // SIGRD
      9 
     10 #include <avr/boot.h>
     11 #include "hardware_id.h"
     12 
     13 __attribute__((weak)) hardware_id_t get_hardware_id(void) {
     14     hardware_id_t id = {0};
     15     for (uint8_t i = 0; i < 10; i += 1) {
     16         ((uint8_t *)&id)[i] = boot_signature_byte_get(i + 0x0E);
     17     }
     18     return id;
     19 }