sane-u12(5)						   SANE Scanner Access Now Easy 					       sane-u12(5)

NAME

       sane-u12 - SANE backend for Plustek USB flatbed scanners, based on older parport designs

DESCRIPTION

       The  sane-u12  library  implements a SANE (Scanner Access Now Easy) backend that provides access to USB flatbed scanners based on Plusteks'
       ASIC 98003 (parallel-port ASIC) and a GeneSys Logics' USB-parport bridge chip.

SUPPORTED DEVICES

       The backend is able to support some early Plustek USB scanner based their old parport design around the ASIC 98003 and other rebadged Plus-
       tek devices. The following tables will give you a short overview.

       If your Plustek scanner has another Product ID, then the device is NOT supported by this backend.

       Vendor Plustek - ID: 0x07B3
       ----------------------------------------------------------
       Model:			Vendor-ID:	 Product-ID:
       ----------------------------------------------------------
       OpticPro U12		0x07B3		 0x0001
       OpticPro U1212		0x07B3		 0x0001
       OpticPro UT12		0x07B3		 0x0001

       Vendor KYE/Genius
       --------------------------------------------------------
       USB Model:		Vendor-ID:	 Product-ID:
       --------------------------------------------------------
       ColorPage Vivid III USB	0x07B3		 0x0001
       ColorPage HR6 V1 	0x0458		 0x2004

CONFIGURATION

       To use your scanner with this backend, you need at least two entries in the configuration file /etc/sane.d/u12.conf
	      [usb] vendor-id product-id
	      device /dev/usbscanner

       [usb]  tells  the backend, that the following devicename (here /dev/usbscanner) has to be interpreted as USB scanner device. If vendor- and
       product-id has not been specified, the backend tries to detect this by its own. If device is set to auto then the next matching	device	is
       used.

       The Options:

       option warmup t
	      t specifies the warmup period in seconds

       option lampOff t
	      t is the time in seconds for switching off the lamps in standby mode

       option lOffonEnd b
	      b specifies the behaviour when closing the backend, 1 --> switch lamps off, 0 --> do not change lamp status

       See the u12.conf file for examples.

       Note:
       You have to make sure, that the USB subsystem is loaded correctly and you have access to the device-node. For more details see sane-usb (5)
       manpage. You might use sane-find-scanner to check that you have access to your device.

       Note:
       If there's no configuration file, the backend defaults to device auto

FILES

       /etc/sane.d/u12.conf
	      The backend configuration file

       /usr/lib64/sane/libsane-u12.a
	      The static library implementing this backend.

       /usr/lib64/sane/libsane-u12.so
	      The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENT

       SANE_CONFIG_DIR
	      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 configura-
	      tion 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 separator character, then the default directories are searched after the explic-
	      itly 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 order).

       SANE_DEBUG_U12
	      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.

	      Example: export SANE_DEBUG_U12=10

SEE ALSO

       sane(7), sane-usb(5), sane-plustek(5),
       /usr/share/doc/packages/sane-backends/u12/U12.changes
       http://www.gjaeger.de/scanner/u12/

CONTACT AND BUG-REPORTS
       Please send any information and bug-reports to:
       SANE Mailing List

       Additional info and hints can be obtained from our
       Mailing-List archive at:
       http://www.sane-project.org/mailing-lists.html

       or directly from the projects' homepage at:
       http://www.gjaeger.de/scanner/u12/

       To obtain debug messages from the backend, please set the environment-variable SANE_DEBUG_U12 before calling  your  favorite  scan-frontend
       (i.e. xscanimage).
       i.e.: export SANE_DEBUG_U12=20 ; xscanimage

       The value controls the verbosity of the backend.

KNOWN BUGS &; RESTRICTIONS
       * The driver is in alpha state, so please don't expect too much!!!

       * When using libusb, it might be, that the backend hangs.  In that case, reconnect the scanner.

								    14 Jul 2008 						       sane-u12(5)