Re: SetAltInterface() error 31

Hello,
You're right. It is a firmware bug. If I disable some endpoint in USB
configuration than mcu can't correctly set alternate settings. All endpoins
must be enabled then all working just fine.

Thank you,
Milan


2014-05-05 7:32 GMT+02:00 Xiaofan Chen <[email protected]>:

> On Sun, May 4, 2014 at 9:15 PM, Johny Gudlik <[email protected]> wrote:
> >
> > Hello,
> > I have problem with USB on SAM3S2C (user board) configured as USB device
> > Vendor Class (it is my first project with USB). I can't set alternate
> > setting to 1 of the interface 0. Device is opened successfully, but I get
> > error in function  SetAltInterface() - 31 (0x1F)  (ERROR_GEN_FAILURE  A
> > device attached to the system is not functioning).
> >
> > I'm using libusbK 3.0.7.0., Windows 7.
> > USB: 2.0, Full speed
> >
> > What am I doing wrong?
>
> This could be a FW bug. Have you check your firmware codes to
> see if you are handling the set alternative interface request
> correctly?
>
> You can also use the debug version of libusbK to install the
> check version of the driver and then use DebugView to
> capture the debug information and post it to this mailing
> list.
>
> Chk version of libusbK:
> http://sourceforge.net/projects/libusbk/files/libusbK-release/3.0.7.0/
> You can download libusbK-3.0.7.0-bin-chk.7z.
>
> 1) Unzip the archive
> 2) Run the chk version of the inf-wizard to replace the driver
> with the device plug-in.
> 3) Plug-out your device
> 4) Run DebugView in admin mode and enable "Capture
> Kernel" and "Enable Verbose Kernel Output".
> 5) Plug-in your device and then run your program
> http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx
> 6) Post the message from DebugView.
>
>
> --
> Xiaofan
>
>
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