On Fri, Nov 06, 2009 at 06:16:47PM +0530, Nicholas Van Orton wrote: > Hello, > > This is with regards to the USB protocol with respect to Endpoints. > The general sequence of events followed would be > > 1)Host sends data packet that ends up in the EP1 OUT > 2)Device then returns data that ends up in EP1 IN > 3)Host sends a IN packet requesting the data at EP1 IN > > The question relates to the 3rd step above, where does the IN packet > sent by the host > end up? Will it end up in EP1 OUT or EP1 IN? Since this is from the host > logically it should end up at EP1 OUT. Is this correct? Endpoints are only one-direction, either from the host, or to the host, so data can only go one way and you are correct. Hope this helps, greg k-h -- 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