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       The sane-mustek_usb library implements a SANE (Scanner Access Now Easy)
       backend that provides access to Mustek (and some relabeled  Trust)  USB
       flatbed scanners.  At present, the following scanners are known to work
       more or less with this backend:

              Mustek 600 CU
              Mustek 1200 UB
              Mustek 1200 CU
              Mustek 1200 CU Plus
              Trust Compact Scan USB 19200

       More  details  can  be   found   on   the   Mustek   backend   homepage

       The  Mustek BearPaw 1200 and 2400 scanners are supported by the plustek
       backend. See sane-plustek(5) for details.

       This backend is based on the 1200ub backend provided by Mustek. It  was
       modified  to fit into the SANE distribution, some bugs were fixed, sup-
       port for the 600 CU was added, and some features added.

       This is BETA software. It currently only works on  Linux  and  FreeBSD.
       Other systems are untested. See BUGS for more information.

       This  backend  can only work with scanners that are already detected by
       the operating system. For Linux, it may be necessary to load the  scan-
       ner    module    with   additional   vendor/product   parameters   /see
       /usr/src/linux/Documentation/usb/scanner.txt for details). With FreeBSD
       upto 4.4 only the 1200 CU will work out-of-the box. For other scanners,
       their ids must be added to the FreeBSD uscanner.c file and a new kernel
       must be compiled.

       If you own a Mustek (or Trust) scanner other than the ones listed above
       that works with this backend, please let me know this  by  sending  the
       scanner’s exact model name and the USB vendor and device ids (e.g. from
       /proc/bus/usb/devices or syslog) to me.


       This backend expects device names of the form:


       Where special is a path-name for the special device that corresponds to
       a  USB scanner.  With Linux, such a device name could be /dev/usb/scan-
       ner0 or /dev/usbscanner1, for example.

       For FreeBSD use /dev/uscanner0.


       The contents of the mustek_usb.conf file  is  a  list  of  options  and
       device  names  that correspond to Mustek USB scanners.  Empty lines and
       lines starting with a hash mark (#) are ignored. If a  device  name  is
       placed in mustek_usb.conf, it must be followed by a line containing the

       The  global  option  max_block_size  can be used to limit the amount of
       data acquired in one turn from the USB system. It may be  woth  trying,
       if USB errors occur.

       A sample configuration file is shown below:

              # Comment
              option max_block_size 1024
              usb 0x055f 0x0001
              option 600cu

       The  first  line  is ignored. The second line sets the buffer size to a
       maximum of 1024 bytes.  The third line tries to  autodetect  a  scanner
       with  vendor  id  0x055f  and  product  id 0x0001 (Mustek 1200 CU). The
       fourth line tells the backend to attach to  /dev/usb/scanner0  and  the
       fifth line specifies that /dev/usb/scanner0 is a Mustek 600 CU.


              The   backend   configuration  file  (see  also  description  of
              SANE_CONFIG_DIR below).

              The static library implementing this backend.

              The shared library implementing this backend (present on systems
              that support dynamic loading).


              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
              SANE_CONFIG_DIR to "/tmp/config:" would  result  in  directories
              "tmp/config",  ".",  and  "/etc/sane.d"  being searched (in this

              If the library was compiled with  debug  support  enabled,  this
              environment  variable controls the debug level for this backend.
              Higher debug levels increase the verbosity of the output.

              Value  Descsription
              0      no output
              1      print fatal errors
              2      print important messages
              3      print non-fatal errors and less important messages

       sane(7),  sane-usb(5),  sane-mustek(5),  sane-mustek_pp(5),  sane-plus-


       Tom Wang (Mustek, original 1200ub backend), Henning Meier-Geinitz <hen->


       This is BETA software. That means that it may contain bugs.

       FreeBSD  support is shaky. Most of the time, scanning will work only in
       the first xscanimage/xsane session. After  closing  the  frontend,  the
       scanner will freeze. The reason is unknown until now.

       More  detailed bug information is available at the Mustek backend home-
       page  See also the CHANGES and  TODO
       files.   Please  contact me if you find a bug or missing feature: <hen->

                                  12 Jan 2002                   sane-mustek(5)

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