Am 2008-12-26 12:26:44, schrieb Pete Zaitcev:
> On Fri, 26 Dec 2008 19:39:04 +0100, Phil Dibowitz <phil@xxxxxxxx> wrote:
>
> > 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)?
>
> What does specifically SnoopyPro show that usbmon doesn't?
> Surely it cannot show you NAK, IN, etc. The hardware does not tell us.
> If can pretend to show SOF, by enabling SOF interrupts and reading
> the frame counter, but even so it's a lie. Other than that we have
> approximately the same URBs that Windows have.
Does this mean, we have to sniff on the USB cable direct to get suitable
results? Maybe I can build a High-Speed scanner which catch the signal
and then we can analyse? But 480 MBit is heavy...
If I need to store the digital siganl as it comes over the USB cable,
how much SDRAM would I need? Are 64 MByte enough? I have some spare
"Microchip" SDRAM chips here maybe I can build something. But it seems
I need to get an DSP for it since I doubt, my AT91SAM9G20 (400 MHz) is
not fast enough to get the RAW USB signal.
Thanks, Greetings and nice Day/Evening
Michelle Konzack
Systemadministrator
24V Electronic Engineer
Tamay Dogan Network
Debian GNU/Linux Consultant
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