Ian Lepore 989da27e45 Switch gpioths(4) from using a callout to a taskqueue for periodic polling
of the sensor hardware.  Part of the polling process involves signalling
the chip then waiting 20 milliseconds.  This was being done with DELAY(),
which is a pretty rude thing to do in a callout.  Now a taskqueue_thread
task is scheduled to do the polling, and because sleeping is allowed in
the task context, pause_sbt() replaces DELAY() for the 20ms wait.
2019-12-09 19:00:39 +00:00
..
2018-04-08 22:59:34 +00:00
2019-08-13 15:38:05 +00:00