On Mon, 10 Dec 2012, Tilman wrote: > Hello > > I am in the process of writing firmware for an USB device based on an 8051 core. > I am testing it against linux kernel driver. > > I am submitting an urb to the device via a linux kernel modul, and I get no > response. The urb eventually times out. Via debug FS I can see that the urb is > indeed submitted. I suspect the firmware to be responsible for this. > > I would like to exclude the linux test driver owever, and wonder if there is a > cheap way to monitor what is happening on the USB bus itself. USB protocol > analyzer start at 1100 USD which is more than I would be willing to invest. You can get a Beagle-12 analyzer from Total Phase for $400: http://www.totalphase.com/products/beagle_usb12/ It handles low-speed and full-speed communication, but not high speed or SuperSpeed. Alan Sten -- 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
