Re: USB newbie: many questions (driver, class, etc.)

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From: Robin (holi_at_gmx.ch)
Date: 06/15/04 

Date: Tue, 15 Jun 2004 17:53:56 +0200

Thanks Doron

I found out, that we could use Communication class (CDC) with Data
subclass. This way, windows creates a virtual COM port on its own (using
usbser.sys).

But by now, we have another problem there:
According to the specs of CDC there are 2 endpoints with another
optional interrupt endpoint. By now, we have this optional endpoint not
made available. MacOS can handle this situation, but Windows 2000 Pro
ends in a blue screen:

KMODE_EXCEPTION_NOT_HANDLED Stop 0x0000001E (OxC0000005, 0xEEF4842F,
0x00000000, 0x0000000C)
Address 0xEEF4842F base at 0xEEF48000 Date Stamp 0x3E2ECF5D USBD.sys

Maybe this can help you (as I see, you are a Microsoft employee) - or
you can give me a hint on this.

I'll come back to this later.

"Doron Holan [MS]" wrote:
>
> GPS does not, but almost every single GPS application does. You will either
> have to buy a driver or develop a virtual
> COM port. Developing it on your own is not an easy task, nor a short lived
> one. If you are not familiar with driver development, it wil take 6 months
> minimum, most likely longer.
>
> d
>
> --
> Please do not send e-mail directly to this alias. this alias is for
> newsgroup purposes only.
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
> "Maxim S. Shatskih" <maxim@storagecraft.com> wrote in message
> news:uBOCTlhUEHA.3012@tk2msftngp13.phx.gbl...
> > > Another thing is: we'd like to show it as a COM-device (maybe "tunnel" 2
> >
> > For what? It is huge amount of extra unnecessary complexity. GPS does not
> > assume the serial port to be used.
> >
> > --
> > Maxim Shatskih, Windows DDK MVP
> > StorageCraft Corporation
> > maxim@storagecraft.com
> > http://www.storagecraft.com
> >
> >

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