check_state.c

void check_state (void) {
        static bool slept_once, woke_once;
        switch (state) {
        case active:
                if (!woke_once){rgblight_mode_noeeprom(DEF_RGB_MODE); woke_once = true;}
                active_timer_two = timer_read();
                elapsed = active_timer_two - active_timer_one;
                if (elapsed < INACTIVE_DELAY) {state = active; return;}
                state = inactive;
                return;

        case inactive:
                if (active_timer_one > active_timer_two){
                        state = active;
                        return;
                }
                active_timer_two = timer_read();
                elapsed = active_timer_two - active_timer_one;
                if (elapsed < SLEEP_DELAY) {return;}
                slept_once = false;
                state = sleeping;
                return;

        case sleeping:
                if (active_timer_one > active_timer_two){
                        woke_once = false;
                        state = active;
                        return;
                }
                if (!slept_once) {rgblight_mode_noeeprom(3); slept_once = true;}
                return;
        }

}