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

#include QMK_KEYBOARD_H

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

	LAYOUT_ortho_4x4(
		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),

 	LAYOUT_tradestation(
		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;
}

void led_set_user(uint8_t usb_led) {

	if (usb_led & (1 << USB_LED_NUM_LOCK)) {
		
	} else {
		
	}

	if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
		
	} else {
		
	}

	if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
		
	} else {
		
	}

	if (usb_led & (1 << USB_LED_COMPOSE)) {
		
	} else {
		
	}

	if (usb_led & (1 << USB_LED_KANA)) {
		
	} else {
		
	}

}