salut Jean, 2009/5/18 Jean Delvare <[email protected]>
> Salut Arnaud, > > On Mon, 18 May 2009 16:14:47 +0200, Arnaud Quette wrote: > > ahah, hem, well to be serious, the game is to identify the report used > when > > doing a battery test. > > so the best would be to only fire usbsnoop when doing that, in order to > find > > the frame more easily and the matching report. > > OK, I managed to get a slightly shorter capture file: > slightly, yeah ;-) > > > http://jdelvare.pck.nerim.net/linux/usbsnoop-apc-back-ups-rs800-battery-test-2.log > > I don't think I'll be able to make it shorter, as the application takes > some time to initialize after I plug the UPS, and only then I can start > the battery test. And the battery test itself takes several seconds. > > I have a hard time believing that so many data flies over the USB wire > when the application is basically doing nothing. > this is the nature of USB: automagic handshake between the device and the host means that there are some data exchange (the descriptors that describes the device, its capabilities and how to interact with it). > The USB sniffer I am using [1] is not exactly user-friendly. I have to > restart the system for every new capture (otherwise I am unable to > reset the capture file), and the capture doesn't end when I exit the > application. It is also not possible to manually start or stop the > capture. Is there any better USB sniffer application you would > recommend? > I don't know. I've not used windows for years... maybe that one, but it's a shareware! http://www.hhdsoftware.com/Products/home/usb-monitor.html does usbsnoop provides a waterfall view (like "tail -f"), in which case, just copy / paste the exact few lines. Otherwise, it will requires more investigations. cheers, Arnaud -- Linux / Unix Expert R&D - Eaton - http://www.eaton.com/mgeops Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/ Debian Developer - http://www.debian.org Free Software Developer - http://arnaud.quette.free.fr/
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