I've got a working "classic" Mac OS USB driver in Mac OS 9.2.2 that uses
one USBPB structure and completion proc to do continuous background
reads from my device's data pipe that occasionally kicks off another to
light the device's LED via the control pipe then issue USBDelay calls
polling an activity flag so it can turn the LED off again. Its all
working well but every so often the USB Log will get filled with an
error repeated over and over, here's a sample:
I haven't been able to catch the exact moment when they start in the
logs but this could be related to unplugging and re-plugging the device.
I'm careful not to reuse USBPB structures and my finalize routine calls
USBAbortPipeByReference on both my data and control pipes. Also, to
hopefully ensure that the USBDelay call would get aborted in finalize I
set its usbReference field to the control pipe. Not sure if this is
necessary or particularly helpful but I'm guessing this error is somehow
related to a USBDelay call.
Anyone have any ideas what I might be doing wrong to cause this?
Thanks.
-----
Dave Warker <email@hidden>
http://warker.com
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