On Thu, 8 Apr 2010, Eric L. Hernes wrote: > Hi all, > > I'm working on an embedded system that uses an NXP LPC-3131 (arm) > processor. I would like to use the combined serial and ethernet > (either multi or CDC) gadget driver so that the host can communicate > with either protocol. The problem that I'm having is that the ARM > has an embedded OTG controller, with only 8 hardware endpoints (4 in > and 4 out). Each of the ethernet and serial gadgets need two ins and > one out, and the system needs in ep0, so I'm short of input > endpoints. > > My question is this: Is it possible to use a common notify endpoint > for both interfaces? meaning can I effectively multiplex the notify > for both functions? Or would there need to be some coordination by > the host driver(s) on the other end as well? I realize that there > would be a significant amount of development to do to implement this. > I do not have a problem doing the work, but I would rather not spend > the time if it won't work. It is not possible to share an endpoint between interfaces. The USB spec forbids this. 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
