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<B><A HREF="sane-st400.5.html">sane-st400(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-st400.5.html">sane-st400(5)</A></B>
</PRE>
<H2>NAME</H2><PRE>
sane-st400 - SANE backend for Siemens ST/Highscan flatbed scanners
</PRE>
<H2>DESCRIPTION</H2><PRE>
The <B>sane-st400</B> library implements a SANE (Scanner Access Now Easy)
backend that provides access to Siemens ST400 flatbed scanners and com-
patibles. At present, the following scanners are supported by this
backend:
Siemens ST400 (6 bit gray scale)
Siemens ST800 (6 bit gray scale)
The driver supports line art and gray scans up to 8bpp.
The Siemens ST/Highscan series includes several more models, e.g. the
ST300 and ST600. If you own one of these scanners, or a scanner other
than the ones listed above that works with this backend, please let us
know by sending the scanner's model name, SCSI ID, and firmware revi-
sion to <I>sane-devel@lists.alioth.debian.org</I>. Have a look at
http://www.sane-project.org/mailing-lists.html concerning subscription
to sane-devel.
</PRE>
<H2>DEVICE NAMES</H2><PRE>
This backend expects device names of the form:
<I>special</I>
Where <I>special</I> is either the path-name for the special device that cor-
responds to a SCSI scanner. For SCSI scanners, the special device name
must be a generic SCSI device or a symlink to such a device. Under
Linux, such a device name could be <I>/dev/sga</I> or <I>/dev/sge</I>, for example.
See <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B> for details.
</PRE>
<H2>CONFIGURATION</H2><PRE>
The contents of the <I>st400.conf</I> file is a list of device names that cor-
respond to Siemens scanners. Empty lines and lines starting with a
hash mark (#) are ignored. A sample configuration file is shown below:
/dev/scanner
# this is a comment
/dev/sge
The default configuration file that is distributed with SANE looks like
this:
scsi SIEMENS "ST 400" Scanner * * 3 0
In this configuration, the driver can only access the ST400 model at
SCSI ID 3 LUN 0 (see section "BUGS" below for the reason). To use the
driver with other scanner models, add an appropriate line to the con-
figuration file. For example, to use it with an ST800 at SCSI ID 3 LUN
0, add the line:
scsi SIEMENS "ST 800" Scanner * * 3 0
</PRE>
<H2>FILES</H2><PRE>
<I>/usr/local/etc/sane.d/st400.conf</I>
The backend configuration file (see also description of
<B>SANE_CONFIG_DIR</B> below).
<I>/usr/local/lib/sane/libsane-st400.a</I>
The static library implementing this backend.
<I>/usr/local/lib/sane/libsane-st400.so</I>
The shared library implementing this backend (present on systems
that support dynamic loading).
</PRE>
<H2>ENVIRONMENT</H2><PRE>
<B>SANE_CONFIG_DIR</B>
This environment variable specifies the list of directories that
may contain the configuration file. Under UNIX, the directories
are separated by a colon (`:'), under OS/2, they are separated
by a semi-colon (`;'). If this variable is not set, the config-
uration file is searched in two default directories: first, the
current working directory (".") and then in /etc/sane.d. If the
value of the environment variable ends with the directory sepa-
rator character, then the default directories are searched after
the explicitly specified directories. For example, setting
<B>SANE_CONFIG_DIR</B> to "/tmp/config:" would result in directories
"tmp/config", ".", and "/etc/sane.d" being searched (in this
order).
<B>SANE_DEBUG_ST400</B>
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend.
E.g., a value of 128 requests all debug output to be printed.
Smaller levels reduce verbosity.
</PRE>
<H2>MISSING FUNCTIONALITY</H2><PRE>
Everything but the most basic stuff.
</PRE>
<H2>BUGS</H2><PRE>
Currently, the backend does not check if the attached device really is
a ST400. It will happily accept everything that matches the configura-
tion entries. This makes it easy to test the backend with other scan-
ners: Just add an appropriate line to the configuration file. The con-
figuration file as distributed (see above) only works with the ST400.
Be careful: If there is no config file at all, the backend defaults to
/dev/scanner.
The ST400 answers on all eight SCSI LUNs. Normally this is not a prob-
lem, as LUN support is usually disabled in SCSI drivers, but if you are
seeing multiple instances of the scanner in a device list, either dis-
able LUNs in your SCSI setup or change the entry in the configuration
file to match LUN 0 only.
</PRE>
<H2>DEBUG</H2><PRE>
If you encounter a bug please set the environment variable
SANE_DEBUG_ST400 to 128 and try to regenerate the problem. Then send me
a report with the log attached.
If you encounter a SCSI bus error or trimmed and/or displaced images
please also set the environment variable SANE_DEBUG_SANEI_SCSI to 128
before sending me the report.
</PRE>
<H2>SEE ALSO</H2><PRE>
<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B>
http://www.informatik.uni-oldenburg.de/~ingo/sane/
</PRE>
<H2>AUTHOR</H2><PRE>
Ingo Wilken &lt;Ingo.Wilken@informatik.uni-oldenburg.de&gt;
sane-backends 1.0.12-cvs 08 Mar 1999 <B><A HREF="sane-st400.5.html">sane-st400(5)</A></B>
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