The sane-mustek_usb library implements a SANE (Scanner Access Now Easy)
       backend that provides access to Mustek USB flatbed scanners  (including
       a  clone  from Trust).  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  USB  backend   homepage

       The  Mustek BearPaw 1200 and 2400 scanners are supported by the plustek
       backend. See sane-plustek(5) for details. The Mustek BearPaw  1200F  is
       supported by the MA-1509 backend. See sane-ma1509(5) for details. Other
       Mustek  USB  scanners  are  supported  by  the  gt68xx   backend,   see

       This  backend  can only work with scanners that are already detected by
       the operating system. See sane-usb(5) for details.

       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
       keyword option and an option specifying the scanner type. The following
       options can be used: 600cu, 1200cu, 1200cu_plus, 1200ub.  For the Trust
       Compact Scan USB 19200 use `option 1200ub'.

       Instead  of  using  the device name, the scanner can be autodetected by
       usb vendor_id product_id statements which  are  already  included  into
              # 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  Description
              0      no output
              1      print fatal errors
              2      print important messages
              3      print non-fatal errors and less important messages
              4      print all but debugging messages
              5      print high level debugging messages
              6      print medium level debugging messages
              7      print low level debugging messages

       Henning Meier-Geinitz <>
       This backend is based on the Mustek 1200ub backend from  Mustek,  main-
       tained by Tom Wang.

       These  devices  have a hardware bug: Once data is written to them, they
       can't be reset (toggle = DATA0). That means, any operation  that  tries
       to reset the device will result in running into timeouts.

       In  earlier  versions this backend failed when it was loaded the second
       time in some configurations. The only choice was to replug the  scanner
       in  this  case. The backend uses a workaround for that bug now but it's
       only tested on Linux. Reports for other operating systems are  appreci-

       More  detailed bug information is available at the Mustek backend home-

                                  13 Jul 2008               sane-mustek_usb(5)
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