Hi, On Mon, Mar 10, 2014 at 01:48:33PM -0600, David Mosberger wrote: > Thanks for taking a look! > > I thought that there might be an bug in re-transmitting the OUT requests > that are being NAK'd indefinitely, but a different flash drive works much > longer and with that drive, I see many OUT requests that get NAK'd a couple > of times, but eventually go through fine. So I think OUT re-transmissions > are fine. That drive still fails eventually with infinite NAKs, but this > one on a bulk-IN transaction. > > I agree, it's time to get a bus analyzer.
cheapest you can find is totalphase.com's USB 480. They have the added benefit of working under windows, linux and mac osx. I'd strongly suggest getting usb480 rather than usb12, as usb12 can only do descriptor parsing :-( http://www.totalphase.com/products/beagle-usb480-power-standard/ -- balbi
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