waiting_set_timer
waiting_set_timer(acb, HZ / 20);
waiting_set_timer(acb, HZ / 20);
waiting_set_timer(acb, HZ / 20);
waiting_set_timer(acb, HZ / 100);
waiting_set_timer(acb, HZ/50);
waiting_set_timer(acb, HZ / 50);