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sane-mustek_usb(5)	 SANE Scanner Access Now Easy	    sane-mustek_usb(5)

       sane-mustek_usb - SANE backend for Mustek USB flatbed scanners

       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	 sane-

       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
       mustek_usb.conf.	  This	is  only supported with Linux 2.4.8 and higher
       and all systems that support libsub. "vendor_id" and  "product_id"  are
       hexadecimal  numbers that identify the scanner. If this doesn't work, a
       device name and the option specifying the scanner type must  be	placed
       in mustek_usb.conf as described above.

       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 worth  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	 /sys‐
	      tem/resources/sane-backends/1.0.18/etc/sane.d.   If the value of
	      the environment variable ends with the directory separator char‐
	      acter,  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	 "/system/resources/sane-back‐
	      ends/1.0.18/etc/sane.d" being searched (in this order).

	      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

	      Example: export SANE_DEBUG_MUSTEK_USB=4

       sane(7),	 sane-usb(5),  sane-mustek(5),	sane-mustek_pp(5),  sane-plus‐
       tek(5), sane-gt68xx(5), sane-ma1509(5)
       ends/1.0.18/doc/sane-1.0.18/mustek_usb/mustek_usb.CHANGES,	 /sys‐

       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‐

sane-backends 1.0.18		  3 Mar 2004		    sane-mustek_usb(5)

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