Tech Support > Microsoft Windows > Drivers > Wdf write/read function for isoc transfer
Wdf write/read function for isoc transfer
Posted by Sisyphus on May 9th, 2006


Hi,
In KMDF, there is a WdfUsbTargetPipeFormatRequestForWrite function that
can be used for bulk and interrupt Writes to the device, but the
documentation doesn't mention the equivalent for an isoc transfer. Does
anyone know how it can be done?

Thanks,
Sisyphus.

Posted by Eliyas Yakub [MSFT] on May 9th, 2006


Framework doesn't support formatting of isoch requests. You have to build
the URB yourself and associate the URB with WDFREQUEST using
WdfUsbTargetPipeFormatRequestForUrb and send it out using WdfRequestSend
function.

When I converted the ISOUSB sample to WDF, that's the way I did it. Since
the hardware is not available anymore, we decided to pull the WDF version of
this sample from DDK. If you want take a look at it to get some idea, please
send me a private email note and I will email it to you.


--
-Eliyas
This posting is provided "AS IS" with no warranties, and confers no rights.
http://www.microsoft.com/whdc/driver/kernel/KB-drv.mspx


Posted by Sisyphus on May 10th, 2006


Thanks a bunch, Eliyas. I'll send you an email for the code.

Regards,
Sisyphus.

Eliyas Yakub [MSFT] wrote:



Similar Posts