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<TITLE>sane-devel: Re: HP Scanjet 3300 [also Re: HP 3400 scanner infor</TITLE>
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<META NAME="Author" CONTENT="Adrian Perez Jorge (adrianpj@easynews.com)">
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<META NAME="Subject" CONTENT="Re: HP Scanjet 3300 [also Re: HP 3400 scanner information]">
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<H1>Re: HP Scanjet 3300 [also Re: HP 3400 scanner information]</H1>
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<!-- received="Sun Jan 7 08:08:07 2001" -->
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<!-- sent="Sun, 7 Jan 2001 08:29:59 -0800" -->
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<!-- name="Adrian Perez Jorge" -->
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<!-- subject="Re: HP Scanjet 3300 [also Re: HP 3400 scanner information]" -->
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<!-- inreplyto="HP Scanjet 3300 [also Re: HP 3400 scanner information]" -->
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<STRONG>From:</STRONG> Adrian Perez Jorge (<A HREF="mailto:adrianpj@easynews.com?Subject=Re:%20HP%20Scanjet%203300%20[also%20Re:%20HP%203400%20scanner%20information]&In-Reply-To=<200101071629.IAA24993@mail13.bigmailbox.com>"><EM>adrianpj@easynews.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun Jan 07 2001 - 08:29:59 PST
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0085.html">Christoph Knauer: "Re: sane,saned und XSane/Windows"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0083.html">Oliver Rauch: "Re: sane,saned und XSane/Windows"</A>
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('binary' encoding is not supported, stored as-is)
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<EM>>> >To me this protocol is absolutly alien.
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</EM><BR>
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<EM>>> >It has _no_ connection to the protocol of the 5300.
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</EM><BR>
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<EM>>>
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</EM><BR>
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<EM>>> That's really a pity. I thought those 8-byte vectors could be a kind
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</EM><BR>
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<EM>>> of a ``SCSI scanner'' like command. Anyway, rev-eng is fun (I hope).
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>You are refering to those:
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>------------------------------------------
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</EM><BR>
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<EM>>The 8-byte vectors I have found in the hp4300 log file are:
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>01 01 00 00 60 00 00 00
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</EM><BR>
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<EM>>^ ^
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</EM><BR>
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<EM>>| +--- hi-byte (length)
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</EM><BR>
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<EM>>+------ lo-byte (length)
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>00 00 00 00 2a 5d 00 00
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>This one is from the hp3300 log file:
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>01 00 00 00 38 dc 00 00a
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>-------------------------------------------
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>>At first glance no, at the second glance I've changed my mind.
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</EM><BR>
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<EM>>A scsi command is usually 6 bytes. It may be 10 or 12 bytes, but never 8.
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</EM><BR>
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<EM>>If it indeed is scsi then it is encapsulated. If you strip of the leading two
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</EM><BR>
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<EM>>bytes the one in the example might be a scsi INQUIRY command.
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</EM><BR>
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<EM>>If this is true the example should have resulted in a reply of 0x60 bytes.
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</EM><BR>
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<EM>>Could you check ?
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</EM><BR>
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<P>After the 0082 (Value) request, there is always a bulk transfer. In
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<BR>
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this case the bulk transfer is 0x60 bytes length. I should not use
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<BR>
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TAB caracters in my e-mails to buid the diagrams. The 5th byte of the
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<BR>
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8-byte vector is the hi-byte and the 4th byte is the lo-byte of the
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<BR>
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length (not the second and first as your mail reader may be showing
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<BR>
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this text).
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<BR>
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<P>But in that case, the bulk transfer data comes from the computer to
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<BR>
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the scanner... so it doesn't seem to be a `reply'.
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<BR>
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<P><EM>>In addition you should then find a transfer of type III resulting in
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</EM><BR>
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<EM>> 00.
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</EM><BR>
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<P>Just after the bulk transfer a type III transfer doesn't take place.
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<BR>
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The 8-byte request is URB #574, and the next type III request is URB
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<BR>
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#816 . The next 8-byte req is URB #598, so it seems type III requests
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<BR>
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are not a status byte for those 8-byte requests.
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<BR>
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<P><EM>>If this turns out to be the case, I'd suggest that you use usb-storage,
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</EM><BR>
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<EM>>protocol CB on the scanner. It might just work and save you a lot of trouble.
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</EM><BR>
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<P>Thanks for the info. I have ignored usb-storage and seems a fairly
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<BR>
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common interface for SCSI and USB. I'll first look for the specs and
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<BR>
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compare the protocol.
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<BR>
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<P>Cheers,
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<BR>
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<P><P><P><P>Adrian Perez Jorge
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<BR>
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<<A HREF="mailto:adrianpj@easynews.com?Subject=Re:%20HP%20Scanjet%203300%20[also%20Re:%20HP%203400%20scanner%20information]&In-Reply-To=<200101071629.IAA24993@mail13.bigmailbox.com>">adrianpj@easynews.com</A>>
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<BR>
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<P>------------------------------------------------------------
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<BR>
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Free Web space and web based email @EASYNEWS.COM
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<BR>
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<P><P><P><PRE>
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--
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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:%20HP%20Scanjet%203300%20[also%20Re:%20HP%203400%20scanner%20information]&In-Reply-To=<200101071629.IAA24993@mail13.bigmailbox.com>">majordomo@mostang.com</A>
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</PRE>
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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>Sun Jan 07 2001 - 08:09:15 PST</EM>
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