sane-project-website/old-archive/2001-01/0297.html

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<TITLE>sane-devel: Re: FireWire (i.Link / 1394) support?</TITLE>
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<H1>Re: FireWire (i.Link / 1394) support?</H1>
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<STRONG>From:</STRONG> Allan Engelhardt (<A HREF="mailto:allane@cybaea.com?Subject=Re:%20FireWire%20(i.Link%20/%201394)%20support?&In-Reply-To=&lt;3A745834.B1A7071B@cybaea.com&gt;"><EM>allane@cybaea.com</EM></A>)<BR>
<STRONG>Date:</STRONG> Sun Jan 28 2001 - 09:34:44 PST
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Karl Heinz Kremer wrote:
<BR>
<P><EM>&gt; I would guess that
</EM><BR>
<EM>&gt; ever other scanner with an IEEE-1394 interface would also work
</EM><BR>
<EM>&gt; as long as SANE supports the SCSI version of the scanner.
</EM><BR>
<EM>&gt;
</EM><BR>
<P>In my case there is no SCSI equivalent scanner [*]. It is true that the scanner may use a SCSI chipset somewhere, and I'll try to find the spec and all that, but these are newly developed scanners and I don't see why they would use the SCSI control set.
<BR>
<P>I have not yet had a close look at the SANE back-end, but I take it from the responses so far that
<BR>
<P>1. If the scanner uses the SCSI command set, then I should be able to hack the sbp2-ieee1394 driver and get the commands going. Worst case I'll have to write a new SCSI-like backend (not nice, but at least plenty of good examples to start from).
<BR>
<P>2. If the scanner does not use the SCSI command set then I'm, eh, set for more of a challenge? How coupled are the backend architectures to the underlying protocol (SCSI, USB, Parallel)? It seems I'll have to write a new backend with (a) a new command set and (b) a new underlying protocol. [This assumes I can get the specs, of course.] What's the ratio of complexity of (a) to (b)?
<BR>
<P>[I guess the scanner may use an USB-like interface? It seems to me that FireWire is more like USB (like, serial for one) than SCSI.]
<BR>
<P><P><P>Thanks for all the answers so far. I really appreciate it.
<BR>
<P><P>Allan.
<BR>
<P><P>[*] Actually, come to think of it, perhaps this is not strictly true. There was an older SCSI model, though with quite different specs. I'll try <A HREF="http://firewire.zawa.com/sbp2/sbp2_1394_012401.tar.gz">http://firewire.zawa.com/sbp2/sbp2_1394_012401.tar.gz</A> as a starting point [if I ever get the h/w]: thanks for the pointer. The scanner I'm looking at is the new Nikon film scanner.
<BR>
<P><P><P><PRE>
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