Re: Problem with USB High Speed Hub

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Sushma wrote:
When status was STATUS_UNSUCCESSFUL, i tried to resubmit the URB
again, but it fails. Regarding the opening of terminal program again
second time it has all the new URBs. My question is when it is a new
URB why does it fail?

I traced out using an analyzer as well but there are only OUT
transaction but no IN transactions.

One other thing i forgot to mention that in the test scenario

PC<-->High Speed Hub 1<-->High Speed Hub 2<-- >USBSerial Device

High Speed Hub 1 was third party vendor hub from Cypress. If i used a
standard hub available in market, there is no problem. So, can it be
the problem with Cypress hub?

Cypress makes USB integrated circuits, not end user devices, if I recall
correctly.

So, most likely it is the signal conditioning circuit on the USB traces that
is the problem.


Thank You.

Regards,
Sushma


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