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 scanners that based their old parport design around
       the ASIC 98003 and other rebadged Plustek 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(1) 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/lib/x86_64-linux-gnu/sane/libsane-u12.a
              The static library implementing this backend.

       /usr/lib/x86_64-linux-gnu/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.   On  *NIX  systems,  the  directories  are separated by a colon (`:'), under OS/2, they are
              separated by a semi-colon (`;').  If this variable is not set, the configuration 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 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 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), sane-find-scanner(1), xscanimage(1), scanimage(1)
       /usr/share/doc/libsane/u12/U12.changes

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.

       To  obtain  debug  messages  from  the backend, please set the environment-variable SANE_DEBUG_U12 before
       calling your favorite SANE frontend (e.g.  xscanimage(1)):

       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)