DESCRIPTION

The sane-mustek_pp library implements a SANE (Scanner Access Now Easy) backend that provides access to Mustek parallel port flatbed scanners and OEM versions.

There are 2 classes of Mustek parallel port scanners: regular CCD (cold cathode device) scanners and CIS (contact image sensor) scanners.

The current version of this backend supports both CCD type scanners and CIS type scanners.

The following scanners might work with this backend:

CCD scanners

Model:                  ASIC ID:        CCD Type:       works:
--------------------------------------------------------------
SE 6000 P               1013            00              yes
SM 4800 P               1013/1015       04/01           yes
SE 1200 ED Plus         1015            01              no
SM 1200 ED Plus         1015            01              no
SE 12000 P              1505            05              no
600 III EP Plus         1013/1015       00/01           yes
SE 600 SEP              1013            ??              yes
600 II EP               ????            ??              no
MD9848                  1015            00              yes
Gallery 4800            ????            ??              yes
Viviscan Compact II     1013            00              yes

CIS scanners

Model:                  ASIC ID:        works:
-----------------------------------------------
Mustek 600 CP & 96 CP   1015            yes (*)
Mustek 1200 CP          1015            yes
Mustek 1200 CP+         1015            yes

OEM versions            Original        works 
--------------------------------------------------
Medion/LifeTec/Tevion
   MD/LT 9350/9351      1200 CP         yes
   MD/LT 9850/9851      1200 CP         maybe (**)
   MD/LT 9858           1200 CP         probably
   MD/LT 9890/9891      1200 CP         yes
Targa 
   Funline TS12EP       1200 CP         yes
   Funline TS6EP        600 CP          yes
Trust
   Easy Connect 9600+   600 CP          yes
Cybercom 
   9352                 1200 CP         yes (***)

(*) Calibration problems existed with earlier version of

this driver. They seem to be solved now.

(**) Problems have been reported in the past for the

MD/LT9850 type (striped scans, head moving in wrong direction at some resolutions). It is not known whether the current version of the driver still has these problems.

IF YOU HEAR LOUD CLICKING NOISES, IMMEDIATELY UNPLUG THE SCANNER ! (This holds for any type of scanner).

(***) Possibly, the engine_delay parameter has to be set to 1 ms

for accurate engine movements.

Please note that this backend is still under construction. Certain models are currently not supported and some may never be because the communication protocol is still unknown (eg., SE 12000 P).

Some scanners work faster when EPP/ECP is enabled in the BIOS. EPP mode however may lead to hard-locks on some Linux systems. If that is the case for you, you can either disable ECP/EPP in your BIOS or disable it in the backend itself (see GLOBAL OPTIONS).

Note that the backend needs to run as root or has to have appropriate access rights to /dev/parport* if libieee1284 support is compiled in. To allow user access to the scanner run the backend through the network interface (See saned(8) and sane-net(5)). Note also that the backend does not support parport sharing, i.e. if you try printing while scanning, your computer may crash. To enable parport sharing, you have to enable libieee1284 at compile time. This backend also conflicts with the sane-musteka4s2 backend. You can only enable one of them in your dll.conf. However, you have to enable the backend explicitly in your dll.conf, just remove the hash mark in the line "mustek_pp".

DEVICE DEFINITION

This backend allows multiple devices being defined and configured via the mustek_pp.conf file (even simultaneously, provided that they are connected to different parallel ports). Please make sure to edit this file before you use the backend.

A device can be defined as follows:

scanner <name> <port name> <driver>

where

<name>

is an arbitrary name for the device, optionally enclosed by double quotes, for instance "LifeTec 9350".

<port name>

is the name of the parallel port to which the device is connected. In case libieee1284 is used for communication with the port (default setup), valid port names are parport0, parport1, and parport2.

In case the backend is configured for raw IO (old setup), port addresses have to be used instead of port names: 0x378, 0x278, or 0x3BC. The mapping of parallel ports (lp0, lp1, and lp2) to these addresses can be different for different Linux kernel versions. For instance, if you are using a Kernel 2.2.x or better and you have only one parallel port, this 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, /etc/modules.conf and/or /proc/ioports.

If you are unsure which port to use, you can use the magic value * to probe for your scanner.

<driver>

is the driver to use for this device. Currently available drivers are:

cis600 : for 600 CP, 96 CP & OEM versions
cis1200 : for 1200 CP & OEM versions
cis1200+ : for 1200 CP+ & OEM versions
ccd300 : for 600 IIIE P & OEM version

Choosing the wrong driver can damage your scanner!
Especially, using the 1200CP settings on a 600CP can be harmful. If the scanner starts making a loud noise, turn it off immediately !!!

Using the cis600 driver on a 1200CP or a 1200CP+ is probably not dangerous. The cis1200+ driver also works for the 1200CP, and using the cis1200 driver on a 1200CP+ will typically result in scans that cover only half of the width of the scan area (also not dangerous).

If unsure about the exact model of your OEM version, check the optical resolution in the manual or on the box: the 600CP has a maximum optical resolution of 300x600 DPI, whereas the 1200CP and 1200CP+ have a maximum optical resolution of 600x1200 DPI.

Examples:

scanner "LifeTec 9350" 0x378 cis1200

scanner Mustek_600CP 0x378 cis600

scanner Mustek_600IIIEP * ccd300

If in doubt which port you have to use, or whether your scanner is detected at all, you can use sane-find-scanner -p to probe all configured ports.

CONFIGURATION

The contents of the mustek_pp.conf file is a list of device definitions and device options that correspond to Mustek scanners. Empty lines and lines starting with a hash mark (#) are ignored. Options have the following format:

option <name> [<value>]

Depending on the nature of the option, a value may or may not be present. Options always apply to the scanner definition that precedes them. There are no global options. Options are also driver-specific: not all drivers support all possible options.

Common options

bw <value>

Black/white discrimination value to be used during lineart scanning. Pixel values below this value are assumed to be black, values above are assumed to be white.
Default value: 127
Minimum: 0
Maximum: 255

Example: option bw 150

CIS driver options

top_adjust <value>

Vertical adjustment of the origin, expressed in millimeter (floating point). This option can be used to calibrate the position of the origin, within certain limits. Note that CIS scanners are probably temperature sensitive, and that a certain inaccuracy may be hard to avoid. Differences in offset between runs in the order of 1 to 2 mm are not unusual.
Default value: 0.0
Minimum: -5.0
Maximum: 5.0

Example: option top_adjust -2.5

slow_skip

Turns fast skipping to the start of the scan region off. When the region to scan does not start at the origin, the driver will try to move the scanhead to the start of the scan area at the fastest possible speed. On some models, this may not work, resulting in large inaccuracies (up to centimeters). By setting this option, the driver is forced to use normal speed during skipping, which can circumvent the accuracy problems. Currently, there are no models for which these inaccuracy problems are known to occur.

By default, fast skipping is used.

Example: option slow_skip

engine_delay <value>

Under normal circumstances, it is sufficient for the driver to wait for the scanner signaling that the engine is stable, before a new engine command can be transmitted. In rare cases, certain scanners and/or parallel port chipsets appear to prevent reliable detection of the engine state. As a result, engine commands are transmitted too soon and the movement of the scanner head becomes unreliable. Inaccuracies ranging up to 10 cm over the whole vertical scan range have been reported. To work around this problem, the engine_delay option can be set. If it is set, the driver waits an additional amount of time after every engine command, equal to the engine_delay parameter, expressed in milliseconds. It practice an engine_delay of 1 ms is usually sufficient. The maximum delay is 100 ms.

Note that every additional ms of delay can add up to 14 seconds to the total scanning time (highest resolution), so an as small as possible value is preferred.

Default value: 0
Minimum: 0
Maximum: 100

Example: option engine_delay 1

CCD driver options

top <value>

Number of scanlines to skip to the start of the scan area. The number can be any positive integer. Values known to me are 47 and 56.

Default value: 47
Minimum: 0
Maximum: none

Example: option top 56

waitbank <value>

The number of usecs to wait for a bank change. You should not touch this value actually. May be any positive integer

Default value: 700
Minimum: 0
Maximum: none

Example: option waitbank 700

A sample configuration file is shown below:

#
# LifeTec/Medion 9350 on port 0x378
#
scanner "LifeTec 9350" 0x378 cis1200
# Some calibration options (examples!).
option bw 127
option top_skip -0.8
#
# A Mustek 600CP on port 0x3BC
#
scanner "Mustek 600CP" 0x3BC cis600
# Some calibration options (examples!).
option bw 120
option top_skip 1.2
#
# A Mustek 1200CP+ on port 0x278
#
scanner "Mustek 1200CP plus" 0x278 cis1200+
# Some calibration options (examples!).
option bw 130
option top_skip 0.2
#
# A Mustek 600 III EPP on port parport0
#
scanner "Mustek 600 III EPP" parport0 ccd300
# Some calibration options (examples!).
option bw 130
option top 56

GLOBAL OPTIONS

You can control the overall behaviour of the mustek_pp backend by global options which precede any scanner definition in the mustek_pp.conf file.

Currently, there is only one global option:

Global options

no_epp

Disable parallel port mode EPP: works around a known bug in the Linux parport code. Enable this option, if the backend hangs when trying to access the parallel port in EPP mode.

Default value: use EPP

Example: option no_epp

FILES

/etc/sane.d/mustek_pp.conf

The backend configuration file (see also description of SANE_CONFIG_DIR below).

/usr/lib/arch_triplet/sane/libsane-mustek_pp.a

The static library implementing this backend.

/usr/lib/arch_triplet/sane/libsane-mustek_pp.so

The shared library implementing this backend (present on systems that support dynamic loading).

AUTHORS

Jochen Eisinger <jochen at penguin-breeder dot org> 
Eddy De Greef <eddy_de_greef at scarlet dot be>