qmk_firmware_custom/keyboards/handwired/numbrero/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

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

	LAYOUT_numbrero_numpad(
		KC_TRNS, KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
		KC_TRNS, KC_P7,   KC_P8,   KC_P9,
		KC_TRNS, KC_P4,   KC_P5,   KC_P6,   KC_PPLS,
		KC_TRNS, KC_P1,   KC_P2,   KC_P3,
		         KC_P0,            KC_PDOT, KC_PENT),

	LAYOUT_numbrero_ortho(
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		         KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),


};

void matrix_init_user(void) {
}

void matrix_scan_user(void) {
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
	return true;
}