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NAME    [Toc]    [Back]

       sane-umax_pp - SANE backend for Umax parallel port flatbed scanners

DESCRIPTION    [Toc]    [Back]

       The  sane-umax_pp  library  implements a SANE (Scanner Access Now Easy)
       backend that provides access to Umax parallel  port  flatbed  scanners.
       The following scanners work with this backend:

	      Astra 1220P
	      Astra 1600P
	      Astra 2000P

       This  backend handles 75x75, 150x150, 300x300, 600x600 and 600x1200 dpi
       scan resolutions, in color and gray levels. There is no lineart mode.

       These scanners share the same ASIC. Only parts  such  as  CCD  and  ADC
       change  from  one  to  another.	They even all reports being UMAX Astra
       1220P via IEEE1284.  There isn't direct way to recognize them properly.
       Under  windows, model is set by the driver, regardless of the hardware.

       EPP MODE ONLY    [Toc]    [Back]
	      The current version of the backend use only EPP mode to communicate
  with the scanner. PS/2 and SPP mode aren't implemented. It
	      is recommended that you set your parallel port to  EPP  in  BIOS
	      with the current version of this backend.  ECPEPP will only work
	      if you use a 2.4 kernel with ppdev character device support.

       This backend does support parport sharing only if  you  have  a	kernel
       with ppdev support.

       Note that the backend needs to run as root. To allow user access to the
       scanner run the backend through the network interface (See saned(1) and
       sane-net(5)).   A  more relaxed solution (security wise) is to add suid
       bit to the frontend (See chmod(1)).  The backend drop root  priviledges
       as soon as it can, right after gaining direct access to IO ports.

DEVICE NAMES    [Toc]    [Back]

       This backend expects device names of the form:

	      port addr

       Where addr is the base address of the port your scanner is attached to.
       Known ports are 0x378 (lp1) 0x278 (lp2) and 0x3BC (lp0). Note  that  if
       you  are  using	a  Kernel 2.2.x or better , the first parallel port is
       named lp0  regardless  of  the  base  address.  However,  this  backend
       requires  the base address of your port. If you are not sure which port
       your scanner is connected to, have a look at your /etc/conf.modules.

       You can rename any device using the

	      name devname
	      model model
	      vendor vendor

       options. These options apply to the last port option.

CONFIGURATION    [Toc]    [Back]

       Please make sure to edit umax_pp.conf before you use the backend.

       The contents of the umax_pp.conf file is a list of options  and	device
       names that correspond to Umax scanners.	Empty lines and lines starting
       with a hash mark (#) are ignored.

       The height options supported are red-gain, green-gain, blue-gain,  red-
       highlight, green-highlight, blue-highlight, astra, and buffer.

       Options	red-gain  ,  green-gain  and blue-gain allow you to adjust the
       sensitivy of your scanner for the given	color.	Values	range  from  0
       (lowest	gain)  to 15 (highest). When all three gains are set to 0, the
       backend does auto gain tuning.

       Options red-highlight , green-highlight and blue-highlight allow you to
       adjust  the highlight of your scanner for the given color. Values range
       from 0 (lowest highlight) to 15 (highest).

       Option astra allows you to change the model of  your  scanner.  Current
       auto  detection	is  based on side effects on scanning when using 1220P
       command set on other models, so it may fail on unkown hardware combination.
 Valid values are 1220, 1600 and 2000.

       Option  buffer  allows  you  to change the size of the scan buffer. The
       size must be specified in bytes. The default value is 2 megabytes.

FILES    [Toc]    [Back]

	      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).

ENVIRONMENT    [Toc]    [Back]

	      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 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

       SANE_DEBUG_UMAX_PP    [Toc]    [Back]
	      If  the  library	was  compiled with debug support enabled, this
	      environment 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.

	      level   debug output
	      ------- ------------------------------
	       0       nothing
	       1       errors
	       2       warnings & minor errors
	       3       additional information
	       4       debug information
	       5       code flow (not supported yet)
	       6       special debug information

       SANE_DEBUG_UMAX_PP_LOW    [Toc]    [Back]
	      This variable sets the debug level for the  SANE	interface  for
	      the  Umax  ASIC. Note that enabling this will spam your terminal
	      with some million lines of debug output.

	      level   debug output
	      ------- -------------------------------
	       0       nothing
	       1       errors
	       8       command blocks
	       16      detailed code flow
	       32      dump datafiles
	       255     everything

SEE ALSO    [Toc]    [Back]

       sane(7), sane-net(5), saned(1)

       For latest bug fixes and information see

AUTHOR    [Toc]    [Back]

       Stephane VOLTZ <svoltz@wanadoo.fr>, man page derived from mustek_pp man
       page by Jochen Eisinger <jochen.eisinger@gmx.net>

BUG REPORTS    [Toc]    [Back]

       If  something doesn't work, please contact me. But I need some information
 about your scanner to be able to help you...

       SANE version
	      run "scanimage -V" to determine this

       the backend version and your scanner hardware
	      run "SANE_DEBUG_UMAX=255 scanimage -L 2>log"  as	root.  If  you
	      don't  get any output from the umax_pp backend, make sure a line
	      "umax_pp" is included into your /etc/sane.d/dll.conf.   If  your
	      scanner  isn't detected, make sure you've defined the right port
	      address in your umax_pp.conf.

       the name of your scanner/vendor
	      also a worthy information. Please also include the optical resolution
  and  lamp type of your scanner, both can be found in the
	      manual of your scanner.

       any further comments
	      if you have comments about the documentation (what could be done
	      better),	or  you  think I should know something, please include

				 28 April 2001		       sane-umax_pp(5)
[ Back ]
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