Dave Tweed wrote:
> Now, it may be that outbound bulk transfers don't have to wait for a 1
> ms boundary, but the status request that tells the scheduler that
> there's inbound data waiting in the device definitely does.

I'm not in my office now where the USB spec is, but I thought the scheduler
was free to use any remaining slot time after isochronous and other
hard-scheduled activity on bulk transfers in any way it wants to.  Are you
saying that the scheduler is not allowed to re-poll a bulk transfer device
to see if it has input data during left over time?  I don't remember any
such limitation, but it's been a while since I read thru the spec.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist