title: asyncio: sleep for sub-millisecond interval
body: <p>I am building a device based on raspberry PI. It will have several concurrent functions that should work simultaneously. In this case using asyncio looks like a reasonable choice (well, I can write all this stuff in C++ with threads, but python code looks much more compact)</p>
  
  <p>One of the functions is to drive a stepper motor via GPIO pulses. These pulses should be 5-10 microseconds long. Is there a way to get asleep for a sub-milliseconds intervals with asyncio sleep?</p>