Re: FW: gadget composite IAD problem

["Xiaofan Chen" <xiaofanc@xxxxxxxxx>]

On Dec 24, 2007 1:06 AM, Jeremy Greene <jeremy@xxxxxxxxxxxxxx> wrote:
>
> I'm working on getting a composite driver working by modifying existing gadget drivers (and the underlying device driver).
>
> The results:
>
> 1)      For g_ether, it gets pretty far in XP driver installation, then ends with
> "cannot start device, error code 10".
>
> a.       On the device, gets up to the set-config request from host
> 2)      For g_serial, it installs, but no data transfers
>

> It seems that ep0 works fine, but the interface endpoints do not... I am in the
> process of putting a hw sniffer on the usb, but I'm not sure that it will tell me
> too much. I ran a sniffer app on XP, and it did not receive any data when the
> device sent data (and got a transfer complete interrupt).
>
> Any help on this would be greatly appreciated!!
>

I do not know anything about Linux Gadget driver. But anything involve
usbser.sys as one of the interface driver for a USB composite device
will be difficult under Windows XP. Windows does support CDC-ACM but
Microsoft driver usbser.sys is is said to be buggy and problematic

A bit different but kind of related. You might want to try it to see
if it works.
http://support.microsoft.com/kb/918365

Detailed discussion in usb.org:
http://www.usb.org/phpbb/viewtopic.php?t=13308
The conclusion is option 2 does not work under XP.

It might work if you apply the hotfix.
http://www.usb.org/phpbb/viewtopic.php?t=13610

By the way, I think the inf document in the following document
will not work under Windows Vista but I have neither a
Linux gadget device nor Vista OS to test.
http://www.mjmwired.net/kernel/Documentation/usb/gadget_serial.txt

Proper inf files: (to work under XP and Vista):
http://www.obddiag.net/adapter/vcomhcp.inf
http://www.nabble.com/%7BPIC--Re:-USB-driver---VISTA-td14238126.html

The document also mentions Hyperteminal which is not that good.

Xiaofan
http://mcuee.blogspot.com

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