Bug in split transactions on Raspberry Pi

Peter Stuge peter at stuge.se
Mon Jan 25 13:23:29 PST 2016

Alan Stern wrote:
> the device's embedded hub ACKs the packets from the PC and not the
> packets from the RPi.
> What other differences could there be?  Timing?  Power levels?

Yes, both good candidates. Can you measure VUSB? As for timing, the
host controller will send SOF more or less regularly, if too
irregular then that could cause problems for the device. Does your
analyzer provide precise timestamps?


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