horiba-ihr320: shutdown(restart=True) fails

[ddkohler]

Console log from restart

Task was destroyed but it is pending!
task: <Task pending name='Task-1767' coro=<IsDaemon.save_state() done, defined at C:\Users\Wright\source\yaq-python\yaqd-core\yaqd_core\_is_daemon.py:344> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x0000020D356B4F10>()]>>
Task was destroyed but it is pending!
task: <Task pending name='Task-1768' coro=<HoribaIHR320.update_state() done, defined at C:\Users\Wright\miniconda3\lib\site-packages\yaqd_horiba\_horiba_ihr.py:125> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x0000020D356B4250>()]>>
Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x0000020D34E87940>
Traceback (most recent call last):
  File "C:\Users\Wright\miniconda3\lib\asyncio\proactor_events.py", line 116, in __del__
  File "C:\Users\Wright\miniconda3\lib\asyncio\proactor_events.py", line 108, in close
  File "C:\Users\Wright\miniconda3\lib\asyncio\base_events.py", line 746, in call_soon
  File "C:\Users\Wright\miniconda3\lib\asyncio\base_events.py", line 510, in _check_closed
RuntimeError: Event loop is closed
Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x0000020D34E87940>
Traceback (most recent call last):
  File "C:\Users\Wright\miniconda3\lib\asyncio\proactor_events.py", line 116, in __del__
  File "C:\Users\Wright\miniconda3\lib\asyncio\proactor_events.py", line 108, in close
  File "C:\Users\Wright\miniconda3\lib\asyncio\base_events.py", line 746, in call_soon
  File "C:\Users\Wright\miniconda3\lib\asyncio\base_events.py", line 510, in _check_closed
RuntimeError: Event loop is closed

If we get this behavior to work, I think it will provide options for recovering the usb connection in cases of intermittent comm issues.

[ksunden]

Probably just needs a close function which does del self._dev explicitly.

It may also be true that calling self._dev.reset() may just transparently fix it, though not sure if it would need to be homed at that point or not.