Provided by: libsane-common_1.0.23-3ubuntu3.1_amd64 
NAME
sane-umax_pp - SANE backend for Umax Astra parallel port flatbed scanners
DESCRIPTION
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:
Model:
--------------------
Astra 610P
Astra 1220P
HP3200C
Astra 1600P
Astra 2000P
Genius ColorPage-Life Pro
This backend handles 75x75, 150x150, 300x300, 600x600 and 600x1200 for 1220P/1600P/2000P
dpi scan resolutions, and 75x75, 150x150, 300x300 and 300x600 for 610P. In color and gray
levels, there is a software lineart mode.
The new generation models share a newer version of the 610P ASIC embedded in an EPAT chip.
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 software way to recognize them properly. Under
windows, model is set by the driver installed, regardless of the hardware.
EPP/ECP MODES ONLY
The current version of the backend uses only EPP or ECP mode to communicate with
the scanner. PS/2 mode isn't implemented. The 610P only use SPP. It is recommended
that you set your parallel port to EPP in BIOS with the current version of this
backend. You can leave it to ECP or ECP+EPP, but in this case you may not use ppdev
but only direct hardware access if you have to use ECP. ECPEPP will only work if
you use a 2.4 or 2.6 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(8) 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, which lessen risks when being root.
DEVICE NAMES
This backend expects device names of the form:
port value
Where value is :
auto autodetect all parallel ports and probe them for scanner
safe-auto
autodetect all parallel ports and probe them for scanner, but does not try
direct hardware access
/dev/ppi0
uses *BSD ppi device, depending on the number of available parallel port,
you have to use /dev/ppi1, /dev/ppi2, ...
/dev/parport0
uses linux ppdev device, depending on the number of available parallel port,
you have to use /dev/parport1, /dev/parport2, ...
0x378 does direct hardware access on the given address. Usual values are 0x378,
0x278, 0x3BC In this case, you have to run the scanner as root (*BSD and
linux), or with 'IOPL=yes' on OS/2
NOTE: in all cases, you must have sufficient priviledges to get access to the chosen
device or address. Depending on the security settings, devices may not be available for
all users. You have to change permissions on the dev/ppi* or /dev/parport* devices.
You can rename any device using the
name devname
model model
vendor vendor
options. These options apply to the last port option.
CONFIGURATION
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 eight options supported are red-gain, green-gain, blue-gain, red-offset, green-offset,
blue-offset, astra, and buffer.
Options red-gain , green-gain and blue-gain allow you to adjust the sensitivity of your
scanner for the given color. Values range from 0 (lowest gain) to 15 (highest). If the
advanced option "Gain" isn't checked in the frontend, the backend does automatic gain
calibration, and do not use user provided values.
Options red-offset , green-offset and blue-offset allow you to adjust the offset of your
scanner for the given color. Values range from 0 (lowest offset) 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 unknown hardware combination. Valid values are 610, 1220, 1600 and 2000. It is
useful only when autodetection fails to detect properly your scanner model. If your
scanner work properly but is reported wrongly, let it be that way. The only valid case to
change the model is when your scanner produces "black" or "inverted" scans. In this case
you can put the model. Be aware that it will prevent scanner model 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. Decreasing this value will improve the
smoothness of progress bar in the frontend, but will stall the scan more often.
FILES
/etc/sane.d/umax_pp.conf
The backend configuration file (see also description of SANE_CONFIG_DIR below).
/usr/lib/arch_triplet/sane/libsane-umax_pp.a
The static library implementing this backend.
/usr/lib/arch_triplet/sane/libsane-umax_pp.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 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_UMAX_PP
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
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
sane(7), sane-net(5), saned(8)
For latest bug fixes and information see
http://umax1220p.sourceforge.net/
AUTHOR
Stéphane Voltz <stef.dev@free.fr>
CREDITS
Support for the 610P has been made possible thank to an hardware donation by William
Stuart.
BUG REPORTS
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_PP=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, or the correct device 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.
14 Jul 2008 sane-umax_pp(5)