On Mon, 24 Jan 2005, Eddie Cornejo wrote:

> Unfortunately I couldn't figure out how to check the individual lines
> (I'm using a CATC USB bus analyser)

It would probably show up as SE0 (Single-Ended 0).  Moot point now...

>  but I was able to try to find a
> reason for the device to want to reset itself. Looking at the
> transfers over a time scale shows that under windows the device is
> never left idle - it is continuously polled as requested by the unit
> (every 50 units or some such if my memory serves). However under linux
> after the device has started up it is left idle for 1.5 seconds upon
> where I assume it resets itself. (apparently my estimation of the
> device resetting itself every second was off by a wide margin)
> 
> So now it seems that my options are
> - Try to get this working with the hiddev module if possible..however
> if I understand correctly once the device is registered a
> /dev/usb/hiddev node is created allowing me to talk to it. However
> this node doesn't appear on my udev filesystem so either I keep
> mistiming my ls or another problem exists.

I don't know how the USB HID subsystem works, but there are people on the 
linux-usb-devel mailing list who do and who would be able to help.

> - Write my own module, which sounds excessive but I'd be happy to do
> it if no other alternatives exist.
> 
> Anyway, thanks for the help! I'm now off to try to find a way to talk
> to the device.

Good luck!

Alan Stern



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