Re: Feedback endpoint poll rate

On Thu, Apr 10, 2014 at 4:32 PM, Børge Strand-Bergesen
<[email protected]> wrote:
>
> Question: What part of the chain (OS, low-level USB driver,
> libusbK.sys, libusbk.dll, user mode application) does the actual ep
> poll timing? When parsing this value from the descriptor, how is the
> poll timing set up?
>
> I have control over the user mode application and Device firmware. And
> in both I see that correct feedback data is received and generated,
> respectively. I just don't know how to trace it through the Host and
> back to the Device.
>

This is a difficult topic and there are not much information about
feedback endpoint in the web.

So far the best information seems to come from Microchip Forum
as far as I know.

I do not think libusbK driver plays a major part here.

Ref:
http://www.microchip.com/forums/m424170.aspx
http://www.microchip.com/forums/m547546.aspx
http://www.microchip.com/forums/m587913.aspx
http://www.microchip.com/forums/m588830.aspx
http://www.microchip.com/forums/m344751.aspx

-- 
Xiaofan

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