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 [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
