Semtech Touchscreen Driver 1.0 review

Semtech Touchscreen Driver is a driver on X for the Semtech Touchscreen as found on the GoBook III manufactured by Itronix. It com

License: MIT/X Consortium License File size: 122K Developer: Ivan Kanis

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Semtech Touchscreen Driver is a driver on X for the Semtech Touchscreen as found on the GoBook III manufactured by Itronix.

It comes with a calibration program and has been tested on Linux 2.6.9.

You will need a kernel with the following options compiled.

CONFIG_SERIO_RAW=y
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y

Next you will need to enable raw PS/2 reporting for the touchscreen. Type in the following command:

echo -n "serio_raw" > /sys/bus/serio/devices/serio1/driver

You should see the following message:

serio_raw: raw access enabled on isa0060/serio2 (serio_raw0, minor 1)

Compiling:

Type the following command to compile the driver:

make

Installing:

Do the following as root to install the driver:

make install

Configuration:

You will need to issue this command every time the computer starts so I suggest you stick somewhere in the initalization scripts.

Add a section in xorg.conf or XF86Config that looks like this:

Section "InputDevice"
Driver "semtech"
Identifier "Semtech Touchscreen"
Option "Device" "/dev/serio_raw0"
Option "DebugLevel" "0"
Option "CalibrateA" "-369046"
Option "CalibrateB" "1114"
Option "CalibrateC" "4893014"
Option "CalibrateD" "-2152"
Option "CalibrateE" "-282719"
Option "CalibrateF" "5331971"
Option "CalibrateDiv" "-359811"
EndSection

Note that the device can also be called /dev/psaux depending on your setup.

Start X and run the touchcal program to calibrate your screen. It will ouput the calibration information

There is also a program called touchcal.pl, it requires the Perl Tk toolkit. The program will write calibration information on your X configuration file.