On Sun, 28 Jun 2009, lepton wrote: > Hi, > > I am trying implement a userspace usb/ip daemon under linux and > a windows port for usb/ip protocol. I have met a question for > isochronous transfer. > > In the struct of usbdevfs, there is a start_frame element, but how > can I set it correctly? It seems I have no way to get the correct > current_frame from user space, and when a ISO_ASAP transfer is done. > for userspace usbdevfs_urb, the start_frame is not updated too. Then > How can I use this element from user space? You can't. In fact, it's not really possible even for kernel drivers to use start_frame. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
