you can't do timing sensitive stuff without an RTOS, because resources could be preempted by the os or other applications.
it used to be that certain chipsets could do motor control by bitbanging the parallel port, but modern pcs/phones can no longer do this due to latency.
it used to be that certain chipsets could do motor control by bitbanging the parallel port, but modern pcs/phones can no longer do this due to latency.