sane-umax.5



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


NAME

       sane-umax - SANE backend for UMAX scanners


ABOUT THIS FILE

       This file only is a short description of the umax-backend for sane! For
       detailed information take a look at sane-umax-doc.html (it is  included
       in the sane source directory and in the xsane online help)!


DESCRIPTION

       The sane-umax library implements a SANE backend that provides access to
       several UMAX-SCSI-scanners and some Linotye Hell SCSI-scanners,  paral-
       lel- and USB-scanners are not (and probably will never be) supported!

       I  suggest  you  hold one hand on the power-button of the scanner while
       you try the first scans!


CONFIGURATION

       The  configuration  file  for  this   backend   resides   in   /usr/lo-
       cal/etc/sane.d/umax.conf.

       Its contents is a list of device names that correspond to UMAX and UMAX
       compatible scanners. Empty lines and lines starting with  a  hash  mark
       (#) are ignored. A sample configuration file is shown below:

        # this is a comment
        #
        option scsi-maxqueue 4
        option scsi-buffer-size-min 65536
        option scsi-buffer-size-max 131072
        option scan-lines 40
        option preview-lines 10
        option scsi-maxqueue 2
        option execute-request-sense 0
        option force-preview-bit-rgb 0
        option slow-speed -1
        option care-about-smearing -1
        option calibration-full-ccd -1
        option calibration-width-offset -1
        option calibration-bytes-pixel -1
        option exposure-time-rgb-bind -1
        option invert-shading-data -1
        option lamp-control-available 0
        option gamma-lsb-padded 0
        /dev/sge
        #scsi Vendor Model Type Bus Channel ID LUN
        # The following scanner supports lamp control
        option lamp-control-available 1
        scsi UMAX * Scanner * * * * *
        # scanner on /dev/scanner does not support lamp control
        option lamp-control-available 0
        /dev/scanner

       execute-request-sense:
              values: 0 = disabled, 1 = enabled
              default = 0
              If  set to 1 umax_do_request_sense is called in umax_do_calibra-
              tion. This can hang the system (but has been enabled until  this
              version)

       scsi-buffer-size-min, scsi-buffer-size-max:
              values: 4096-1048576
              default min = 32768, max = 131072
              Especially  the  minimum value is very important.  If this value
              is set too small the backend is not able to send gamma tables to
              the  scanner  or to do a correct color calibration. This may re-
              sult in strange color effects. If the minimum value is  set  too
              large  then  the  backend  is not able to allocate the requested
              scsi buffer size and aborts with out of memory  error.  The  de-
              fault is 32KB, for some scanners it should be increased to 64KB.

       scan-lines, preview-lines:
              values: 1-65535
              default: scan-lines = 40, preview-lines = 10
              define  the  maximum  number  of lines that are scanned into one
              buffer

       force-preview-bit-rgb:
              values: 0 = disabled, 1 = enabled
              default = 0
              set preview bit in rgb real scan

       slow-speed, care-about-smearing:
              values: -1 = auto, 0 = disabled, 1 = enabled
              default = -1
              dangerous options, needed for some scanners do not changed these
              options  until you really know what you do, you may destroy your
              scanner when you define wrong values for this options

       calibration-full-ccd:
              values: -1 = auto, 0 = disabled, 1 = enabled
              default = -1
              do calibration for each pixel of ccd instead of selected image

       calibration-width-offset:
              values: -99999 = auto, > -99999 set value
              add an offset width to the calculated with for image/ccd

       calibration-bytes-pixel:
              values: -1 = disabled, 0 = not set, 1 =  1  byte/pixel,  2  =  2
              bytes/pixel
              use # bytes per pixel for calibration

       exposure-time-rgb-bind:
              values:  -1  =  automatically set by driver - if known, 0 = dis-
              abled (own selection for red, green and blue), 1 = enabled (same
              values for red, green and blue)

       invert-shading-data:
              values:  -1  =  automatically set by driver - if known, 0 = dis-
              abled, 1 = enabled
              default = -1
              invert shading data before sending it back to the scanner

       lamp-control-available:
              values: 0 = automatically set by driver - if known, 1  =  avail-
              able
              default = 0

       gamma-lsb-padded:
              values:  -1  = automatically set by driver - if known, 0 = gamma
              data is msb padded, 1 = gamma data is lsb padded
              default = -1

       handle-bad-sense-error:
              values: 0 = handle as device busy, 1 = handle as ok, 2 =  handle
              as i/o error, 3 = ignore bad error code - continue sense handler
              default = 0

       scsi-maxqueue:
              values: 1..# (maximum defined at compile time)
              default = 2
              most  scsi  drivers allow internal command queueing with a depth
              of 2 commands. In most cases it does not  mprove  anything  when
              you  increase this value. When your scsi driver does not support
              any command queueing you can try to set this value to 1.

       The special device name must be a generic SCSI device or a  symlink  to
       such  a  device.   To find out to which device your scanner is assigned
       and how you have to set the permissions of that device, have a look  at
       sane-scsi.


SCSI ADAPTER TIPS

       The  ISA-SCSI-adapters that are shipped with some Umax-scanners are not
       supported very well by Linux (I suggest not to use it),  the  PCI-SCSI-
       adapters that come with some Umax-scanners are not supported at all (as
       far as I know). On other platforms these  SCSI-adapters  are  not  sup-
       ported.  So you typically need to purchase another SCSI-adapter that is
       supported by your platform. See the relevant hardware FAQs  and  HOWTOs
       for your platform for more information.

       The  UMAX-scanners  do block the scsi-bus for a few seconds while scan-
       ning. It is not necessary to connect  the  scanner  to  its  own  SCSI-
       adapter.  But  if  you  need short response time for your SCSI-harddisk
       (e.g. if your computer is a file-server) or other scsi devices, I  sug-
       gest you use an own SCSI-adapter for your UMAX-scanner.

       If  you have any problems with your Umax scanner, check your scsi chain
       (cable length, termination, ...).

       See also: sane-scsi(5)


FILES

       The backend configuration file:
              /usr/local/etc/sane.d/umax.conf

       The static library implementing this backend:
              /usr/local/lib/sane/libsane-umax.a

       The shared library implementing this backend:
              /usr/local/lib/sane/libsane-umax.so  (present  on  systems  that
              support dynamic loading)


ENVIRONMENT

       SANE_DEBUG_UMAX
              If the library was compiled with debug support enabled, this en-
              vironment variable controls the debug level  for  this  backend.
              E.g.,  a  value  of 128 requests all debug output to be printed.
              Smaller levels reduce verbosity: SANE_DEBUG_UMAX values

              Number  Remark
               0       print important errors (printed each time)
               1       print errors
               2       print sense
               3       print warnings
               4       print scanner-inquiry
               5       print information
               6       print less important information
               7       print called procedures
               8       print reader_process messages
               10      print called sane-init-routines
               11      print called sane-procedures
               12      print sane infos
               13      print sane option-control messages

       Example:
              export SANE_DEBUG_UMAX=8


BUGS

       X-resolutions greater than 600 dpi sometimes make problems


SEE ALSO

       sane(7)


AUTHOR

       Oliver Rauch


EMAIL-CONTACT

       Oliver.Rauch@Rauch-Domain.DE

                                  14 Jul 2008                     sane-umax(5)

Man(1) output converted with man2html