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<H1>Work started on FB630U</H1>
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<STRONG>From:</STRONG> Simon Heywood (<A HREF="mailto:simon.heywood@physics.org?Subject=Re:%20Work%20started%20on%20FB630U&In-Reply-To=&lt;Pine.SOL.4.30.0106091420380.7220-100000@mimosa.csv.warwick.ac.uk&gt;"><EM>simon.heywood@physics.org</EM></A>)<BR>
<STRONG>Date:</STRONG> Sat Jun 09 2001 - 06:43:24 PDT
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Now I've finished my final exams at the university of Warwick I can devote
<BR>
some time to this project. I hope you can help me get started - I've got
<BR>
about 16 weeks to do this before I start work full time.
<BR>
<P>Firstly, I've had a little difficulty with the SniffUSB utility. Since
<BR>
there's no documentation, I'm purely guessing what to do. Sniff USB shows
<BR>
two devices in its window - the root hub and my scanner - and I've
<BR>
installed a sniffer on both (is that correct ?).
<BR>
<P>I have produced a few logs with this setup, obtaining identical output for
<BR>
plugging in the scanner on a clean rebooted system, waiting a few seconds,
<BR>
then unplugging it again. This output can be found at:
<BR>
<P><A HREF="http://www.warwick.ac.uk/~phucq/scanner/usb-init-3.txt">http://www.warwick.ac.uk/~phucq/scanner/usb-init-3.txt</A>
<BR>
<P>I also made a log by clicking the &quot;replug&quot; button whilst the scanner was
<BR>
selected in SniffUSB:
<BR>
<P><A HREF="http://www.warwick.ac.uk/~phucq/scanner/usb-init-2.txt">http://www.warwick.ac.uk/~phucq/scanner/usb-init-2.txt</A>
<BR>
<P>Finally, I am using a test program (thoughtfully ripped from Vladimir's
<BR>
ct.c) to try to get some sense out of the scanner, with little success
<BR>
thus far:
<BR>
<P><A HREF="http://www.warwick.ac.uk/~phucq/scanner/canon-usb.c">http://www.warwick.ac.uk/~phucq/scanner/canon-usb.c</A>
<BR>
<P><P>Now time for some questions!
<BR>
<P>Which direction is which in the SniffUSB logs? I'm assuming that &quot;going
<BR>
down&quot; is PC to scanner and that &quot;coming back&quot; is scanner to PC, but I'm
<BR>
sure there's scope for confusion with the USB architecture.
<BR>
<P>I'm assuming that the actual data sent/received is the line of hex numbers
<BR>
after &quot;0000:&quot; - is this all that gets sent? I've tried reproducing these
<BR>
codes by writing them to the scanner device and trying to read what gets
<BR>
sent back, but I've never heard back from the scanner.
<BR>
<P>Of course, it doesn't help that the USB 1.1 docs are fairly inpenetrable
<BR>
to non-Intel people - I think we should send the Plain English Society
<BR>
posse round. ;-)
<BR>
<P>TIA,
<BR>
<PRE>
--
Simon Heywood &lt;<A HREF="mailto:simon.heywood@physics.org?Subject=Re:%20Work%20started%20on%20FB630U&In-Reply-To=&lt;Pine.SOL.4.30.0106091420380.7220-100000@mimosa.csv.warwick.ac.uk&gt;">simon.heywood@physics.org</A>&gt;
website: <A HREF="http://www.warwick.ac.uk/~phucq/">http://www.warwick.ac.uk/~phucq/</A>
<P><P>--
Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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