Re: EHCI host controller not work on CE 5.0

From: David Liao \(MS\) (davli_at_online.microsoft.com)
Date: 10/29/04 

Date: Fri, 29 Oct 2004 11:14:05 -0700

Probably thei onboard EHCI is setup to use 64-bit bus extention. The EHCI in
Windows CE does not 64-bit bus extention. This is a bug.

David Liao

"volens" <leeyl@vimicro.com> wrote in message
news:OG6BfqZvEHA.1300@TK2MSFTNGP14.phx.gbl...
> Dear all,
>
> I am developing USB 2.0 camera driver on CE 5.0. I have met a big problem.
>
> I build a platform for CEPC. The machine I use for CEPC is a Dell
> Dimension
> 4700. I download os image to CEPC by Ethernet. The CE is loaded and works.
> Unfortunately, it cannot recognize any USB device.
>
> Thus I disable the integrated USB on the Dell's maini board. I plug a PCI
> USB 2.0 card into Dell. The CE is loaded and works. At the same time, it
> may
> recognize USB device.
>
> I have checked. The EHCI.dll, UHCI.dll, and USBD.dll, are all loaded under
> these two situations.
>
> Why does the integrated EHCI host controller not work?
>
> Thanks
>
> Volens
> Oct 29, 2004
>
>