On Sun, Oct 13, 2002, David Brownell <[EMAIL PROTECTED]> wrote: > > >>The HC does not control bandwidth reclamation for low speed transfers. I > >>am not sure what happens in case of frame overrun (device stall, or > >>would that not matter in case of control endpoints?). > > > > Nothing that serious. The HC won't let a transfer spill over into the > > next frame. It'll just wait until the next frame and start the schedule > > over again. > > Does UHCI notice that while there's no time left for a lowspeed > transfer, there may be time for a high speed one ... and try > the high speed transfer?
That's a good question. I don't recall seeing anything that describes that the UHCI will do that. I'll have to check the specs, but it may be that different implementations behave differently. > Just curious. OHCI is supposed to do that. (EHCI doesn't have > such issues, it only ever talks high speed even when it goes > through a TT in some hub.) Well, just going my past experience with UHCI, I'll say that it's too dumb to do that :) JE ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
