Re: at91_udc driver does not forward data received from host if size is less than ep buffer and size %64 == 0
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Thursday 22 February 2007 11:07 am, Jeff Warren wrote: > So I have changed my host program to check and see if the data size > being sent to the gadget is divisible by 64 (size % 64 == 0). If it is, > then I add a small chunk so that the driver will handle it correctly and > the data will be processed upon transfer completion. > I hate this fix, but it is the only one I can think of, anybody have a > better way of fixing this issue? I looked at the driver and could not > come up with an elegant solution to this. On Linux, at least, you would set a flag in the URB to say that it must terminated by a zero-length packet. Your driver wouldn't have to check anything, the underlying controller driver would ensure the transfer is terminated by a "short" packet (in this case, a zero length packet). - Dave ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel