qmk_firmware/keyboards/handwired/traveller/traveller.c

#include "traveller.h"

__attribute__ ((weak))
void matrix_init_user(void) {
        // leave this function blank - it can be defined in a keymap file
};

__attribute__ ((weak))
void matrix_scan_user(void) {
        // leave this function blank - it can be defined in a keymap file
}

__attribute__ ((weak))
void process_action_user(keyrecord_t *record) {
        // leave this function blank - it can be defined in a keymap file
}

__attribute__ ((weak))
void led_set_user(uint8_t usb_led) {
        // leave this function blank - it can be defined in a keymap file
}

void matrix_init_kb(void) {
        // put your keyboard start-up code here
        // runs once when the firmware starts up

#ifdef RGBLIGHT_ENABLE
        rgblight_init();
        rgblight_mode(1); // solid, no timer
        rgblight_setrgb(0,20,0);// dim green, happens to be same as _QW
#endif

// Turn status LED on
        DDRC |= (1<<7);
        PORTC |= (1<<7);

        matrix_init_user();
}


void matrix_scan_kb(void) {
	// put your looping keyboard code here
	// runs every cycle (a lot)

	matrix_scan_user();
}

bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
	// put your per-action keyboard code here
	// runs for every action, just before processing by the firmware

	return process_record_user(keycode, record);
}

void led_set_kb(uint8_t usb_led) {
	// put your keyboard LED indicator (ex: Caps Lock LED) toggling code here

	led_set_user(usb_led);
}