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<TITLE>sane-devel: Re: Work started on FB630U</TITLE>
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<META NAME="Author" CONTENT="Glenn Ramsey (glenn@componic.com)">
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<META NAME="Subject" CONTENT="Re: Work started on FB630U">
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<H1>Re: Work started on FB630U</H1>
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<!-- received="Sat Jun 9 15:29:26 2001" -->
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<!-- isoreceived="20010609222926" -->
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<!-- sent="Sun, 10 Jun 2001 10:35:20 +1200" -->
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<!-- isosent="20010609223520" -->
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<!-- name="Glenn Ramsey" -->
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<!-- email="glenn@componic.com" -->
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<!-- subject="Re: Work started on FB630U" -->
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<!-- id="3B22A4A8.EF7902FF@goata.nz.componic.com" -->
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<!-- inreplyto="Pine.SOL.4.30.0106091420380.7220-100000@mimosa.csv.warwick.ac.uk" -->
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<STRONG>From:</STRONG> Glenn Ramsey (<A HREF="mailto:glenn@componic.com?Subject=Re:%20Work%20started%20on%20FB630U&In-Reply-To=<3B22A4A8.EF7902FF@goata.nz.componic.com>"><EM>glenn@componic.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat Jun 09 2001 - 15:35:20 PDT
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0153.html">Henning Meier-Geinitz: "Re: HP Scanjet 2200C"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0151.html">Stefan Nilsen: "HP Scanjet 2200C"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0141.html">Simon Heywood: "Work started on FB630U"</A>
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<HR NOSHADE><P>
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<!-- body="start" -->
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<P>
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Hi Simon,
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<BR>
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Simon Heywood wrote:
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<BR>
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<P><EM>> Firstly, I've had a little difficulty with the SniffUSB utility. Since
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</EM><BR>
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<EM>> there's no documentation, I'm purely guessing what to do. Sniff USB shows
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</EM><BR>
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<EM>> two devices in its window - the root hub and my scanner - and I've
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</EM><BR>
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<EM>> installed a sniffer on both (is that correct ?).
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</EM><BR>
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<P>I found that I only needed a sniffer on the scanner, not the hub.
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<BR>
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If you have the sniffer on both then you might be getting some
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<BR>
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stuff that you don't need.
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<BR>
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<P><EM>>
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</EM><BR>
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<EM>> Which direction is which in the SniffUSB logs? I'm assuming that "going
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</EM><BR>
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<EM>> down" is PC to scanner and that "coming back" is scanner to PC, but I'm
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</EM><BR>
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<EM>> sure there's scope for confusion with the USB architecture.
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</EM><BR>
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<P>I can only relate my experience with the Microtek ScanMaker 3600,
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<BR>
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and for that scanner the directions are as you have assumed.
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<BR>
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<P><EM>> I'm assuming that the actual data sent/received is the line of hex numbers
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</EM><BR>
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<EM>> after "0000:" - is this all that gets sent?
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</EM><BR>
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<P>Yes, the buffer contents are listed after the 0000: lines. Not
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<BR>
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sure about bulk transfers but for control transfers the request,
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<BR>
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value, index and requesttype fields are likely to have some
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<BR>
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significance.
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<BR>
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<P><EM>> I've tried reproducing these
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</EM><BR>
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<EM>> codes by writing them to the scanner device and trying to read what gets
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</EM><BR>
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<EM>> sent back, but I've never heard back from the scanner.
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</EM><BR>
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<P>Did you send the control transfers as well as the bulk transfers?
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<BR>
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<BR>
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You might have noticed that Snoopy sometimes loses URBs when it is
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<BR>
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heavily loaded, like when transferring scan data. Marian Eichholz
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<BR>
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has a hacked version of snoopy that doesn't try to log the data
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<BR>
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from bulk transfers, it just logs the size, and doesn't lose
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<BR>
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transfers (well, that we have noticed yet), you might find that
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<BR>
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useful. Get in touch if you want it.
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<BR>
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<P>Also once we had figured out what data in the logs was relevant we
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<BR>
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wrote some scripts that extracted that data and presented it in a
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<BR>
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more readable way. The scripts are in the sm3600 project cvs on
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<BR>
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sourceforge. They are called logfilter.pl and squeezelog.pl. You
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<BR>
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might get some ideas from them.
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<BR>
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<P>Good luck.
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<BR>
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<P>Regards
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<BR>
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g
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<BR>
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<P><PRE>
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--
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Glenn Ramsey
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<A HREF="mailto:glenn@componic.com?Subject=Re:%20Work%20started%20on%20FB630U&In-Reply-To=<3B22A4A8.EF7902FF@goata.nz.componic.com>">glenn@componic.com</A>
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<P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Work%20started%20on%20FB630U&In-Reply-To=<3B22A4A8.EF7902FF@goata.nz.componic.com>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0153.html">Henning Meier-Geinitz: "Re: HP Scanjet 2200C"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0151.html">Stefan Nilsen: "HP Scanjet 2200C"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0141.html">Simon Heywood: "Work started on FB630U"</A>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sat Jun 09 2001 - 15:29:47 PDT</EM>
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