On Wed, 2005-09-21 at 15:35 +0800, Yu Zhenshen wrote:

> I have tried all host controller interfaces: ohci, ehci and  uhci, all of 
> them works the same, except the output messages differ:
>   For EHCI, the dmesg output is:

This is obviously not ehci, as the P18F2455 only supports low and full
speed.

You need to provide much more details.

I'd hazard a guess that you try to connect while the Xtal oscillator/PLL
is not stable/locked yet, check that at the moment you try to connect,
the PLL is fully locked and stable.

Tom




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