Elliotte Harold wrote:
Dan Streetman wrote:
However there are a large number of other USB exceptions, PID, CRC,
Babble, BitStuff, Stall, etc. Basically whenever you send/receieve
data over the USB bus, any of the errors defined in the USB spec can
happen. Additionally, the OS may encounter a non-specific error and
throw a UsbPlatformException.
I've now encountered several of these myself. However, in every single
case I've seen so far, each one has been an indication of a bug in my
program, not an unexpected problem with a device. Thus I would have
expected these to be runtime exceptions. Is there any way a condition on
the bus outside the control of my program might cause one of these
exceptions?
I have tried using one of the Igor USB devices (implemented on the Atmel
AVR architecture), and I always get BitStuff exceptions from the C code.
Have not been able to trace if it is the device yet.
//Roger
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