Pete Zaitcev wrote: > On Fri, 26 Dec 2008 09:02:25 +0100, Michelle Konzack <linux4michelle@xxxxxxxxxxxxxxx> wrote: > >> I an developing a "24V DC modular ATX PSU" which act like a UPS and I >> have problems with the USBHID-PDU stuff... >> >> Q 1: Is there a commandline tool, which can be used to sniff USB >> traffic and able to analyse singel (selected) endpoints? > > The usbmon is useful, but keep in mind that it only shows a higher > level overview of transfers that kernel does. So you will not see > SOF and NAK frames for example. If you have trouble with your UPS-like > device not working, it may need some traces generated by its own > firmware. I understand that may be tough if you don't have enough > RAM in the device, but c'est la vie. This is something I've run into problems with a few times. What's the reason usbmon can't dumb *everything* (ala SnoopyPro in windows)? > Alan Stern once posted a very useful sheet to decode the usbmon's > output, I saved it here: > http://people.redhat.com/zaitcev/notes/usb_stern_cheat.txt Bookmarked, thanks. BTW.... s/harward/harvard/ =) -- Phil Dibowitz phil@xxxxxxxx Open Source software and tech docs Insanity Palace of Metallica http://www.phildev.net/ http://www.ipom.com/ "Never write it in C if you can do it in 'awk'; Never do it in 'awk' if 'sed' can handle it; Never use 'sed' when 'tr' can do the job; Never invoke 'tr' when 'cat' is sufficient; Avoid using 'cat' whenever possible" -- Taylor's Laws of Programming
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