qmk_firmware_custom/keyboards/omnikey_blackheart/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

// Fillers to make layering more clear
#define _______ KC_TRNS
#define XXXXXXX KC_NO

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

  [0] = LAYOUT(\
    KC_F11,  KC_F12,      KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,               KC_PSCR, KC_SLCK, KC_PAUS,
    KC_F1,   KC_F2,       KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC,     KC_INS,  KC_HOME, KC_PGUP,     KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
    KC_F3,   KC_F4,       KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS,     KC_DEL,  KC_END,  KC_PGDN,     KC_P7,   KC_P8,   KC_P9,   KC_PPLS,
    KC_F5,   KC_F6,       KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, KC_ENT,               XXXXXXX, XXXXXXX, XXXXXXX,     KC_P4,   KC_P5,   KC_P6,   KC_EQL,
    KC_F7,   KC_F8,       KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT, MO(1),                XXXXXXX, KC_UP,   XXXXXXX,     KC_P1,   KC_P2,   KC_P3,   KC_PENT,
    KC_F9,   KC_F10,      KC_LCTL, KC_LGUI, KC_LALT,                   KC_SPC,                                      KC_RALT, KC_RGUI, KC_RCTL, XXXXXXX,     KC_LEFT, KC_DOWN, KC_RGHT,     KC_P0,            KC_PDOT
  ),

  [1] = LAYOUT(\
    _______, _______,     _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,              _______, _______, _______,
    _______, _______,     RESET,   _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,     _______, _______, _______,     _______, _______, _______, _______,
    _______, _______,     _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,     _______, _______, _______,     _______, _______, _______, _______,
    _______, _______,     _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,              XXXXXXX, XXXXXXX, XXXXXXX,     _______, _______, _______, _______,
    _______, _______,     _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,              XXXXXXX, _______, XXXXXXX,     _______, _______, _______, _______,
    _______, _______,     _______, _______, _______,                   _______,                                     _______, _______, _______, XXXXXXX,     _______, _______, _______,     _______,          _______

  ),
};

void led_set_kb(uint8_t usb_led) {
  DDRB |= (1 << 4) | (1 << 5) | (1 << 6);

  if (usb_led & (1 << USB_LED_NUM_LOCK)) {
    PORTB |= (1 << 4);
  } else {
    PORTB &= ~(1 << 4);
  }

  if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
    PORTB |= (1 << 5);
  } else {
    PORTB &= ~(1 << 5);
  }

  if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
    PORTB |= (1 << 6);
  } else {
    PORTB &= ~(1 << 6);
  }
}