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Message
From: jfilling at gmail.com<jfilling@g...>
Date: Wed May 18 20:10:25 CEST 2005
Subject: [usb] NAK problems
I've discovered a little more interesting information. After chasing
several items that yielded no positive results, I decided that I
needed to simplify my test case.
If I configure a CTRL endpoint with buffer 0 (OUT buffer) marked as
used, the very first packet (GetStatus according to my sniffer)
transmitted by the host causes all kinds of strange errors. I receive
a UTMI Rx Error interrupt from the device core, and the device core
seems to spew random garbage back to the host.
I expected that this test should cause the device core to simply NAK
the OUT packet from the host.
Does this behavior ring a bell for anyone out there?
Rudi, if you are there, does this sound completely crazy?
I know that I am using a previously untested configuration, but given
the number of things that work properly, this just seems odd. I don't
really see any issues with the protocol engine logic, but then again
I'm no USB expert.
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