sane-umax_pp - SANE backend for Umax parallel port flatbed scanners
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
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
EPP MODE ONLY
The current version of the backend use only EPP mode to communicate with the scan-
ner. PS/2 and SPP mode aren't implemented. It is recommended that you set your par-
allel 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 if you don't use the ppdev character device, 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.
This backend expects device names of the form:
Where value is the base address, or the ppdev device name 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/modules.conf.
If you are using the linux ppdev character device, you will have to specify the device
name, which is /dev/parport0 for the first parallel port.
You can rename any device using the
options. These options apply to the last port option.
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 corre-
spond 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 high-
light of your scanner for the given color. Values range from 0 (lowest highlight) to 15
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. It is usefull
only autodetection fails to detect properly your scanner model. If your scanner work prop-
erly but is reported wrongly, let it be that way. The only valid case to change the model
is when your scanner produces 'black' or prevent autodetection.
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.
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
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 order).
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
2 warnings & minor errors
3 additional information
4 debug information
5 code flow (not supported yet)
6 special debug information
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
8 command blocks
16 detailed code flow
32 dump datafiles
sane(7), sane-net(5), saned(1)
For latest bug fixes and information see
Stephane VOLTZ <email@example.com>, man page derived from mustek_pp man page by Jochen
If something doesn't work, please contact me. But I need some information about your scan-
ner to be able to help you...
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 it.
15 February 2002 sane-umax_pp(5)