On Fri, May 25, 2012 at 3:19 AM, g...@novadsp.com <g...@novadsp.com> wrote:
> Hello Pete,
>
>> please be aware that the Windows driver we use at the
>> moment doesn't support isoch (see "Known Restrictions" for WinUSB at
>> [1]),
>
> Indeed. Why on earth make WinUSB without isoch support.

It is a low priority for Microsoft. And indeed they have good
reasons to do that. Isochronous transfer are more suitable
for audio/video (dedicated drivers) and not for generic device
(which winusb/libusb0.sys/libusbk.sys are mainly for).

>> though we're planning to add drivers that support isoch in the future.
>
> Has anyone started working on this?
libusbx 1.1.13 (expected to be due in 3 months) will have it.
http://sourceforge.net/apps/trac/libusbx/roadmap


-- 
Xiaofan

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