Tslib
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Revision as of 17:31, 30 June 2008 by JulienB (Talk | contribs) (→Configuration details (automatically done))
Library which provides a common interface to touchscreen and allows touchscreen events filtering or calibrating...
Contents
Compiling
Preliminaries checks
This part is normaly not required on following distribution: ??
This part is required on: Ubuntu 6.04, KUbuntu 6.10 or more
- Be sure to have libtool package installed (tested with 1.5.22-4 & 1.5.24-1 versions).
Otherwise you will have following errors:
configure.ac:25: error: possibly undefined macro: AC_DISABLE_STATIC
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:26: error: possibly undefined macro: AC_ENABLE_SHARED
configure.ac:27: error: possibly undefined macro: AC_LIBTOOL_DLOPEN
configure.ac:28: error: possibly undefined macro: AC_PROG_LIBTOOL
- Be sure to have automake-1.6 or higher package installed (tested with 1.7 version -> working, 1.9.6 -> not working & 1.10 -> working !).
After automake package installation don't forget to update your /etc/alternatives/automake and /etc/alternatives/aclocal symlinks (tested on Ubuntu).
$ sudo ln -sf /usr/bin/automake-1.7 /etc/alternatives/automake $ sudo ln -sf /usr/bin/aclocal-1.7 /etc/alternatives/aclocal --> lrwxrwxrwx 1 root root 20 2007-06-27 21:43 /etc/alternatives/aclocal -> /usr/bin/aclocal-1.7 lrwxrwxrwx 1 root root 21 2007-06-27 21:39 /etc/alternatives/automake -> /usr/bin/automake-1.7
This part is MANDATORY
- In Buildroot, if you don't have configured the C++ cross-compiler yet (done in default configuration), then:
$ make menuconfig Toolchain Options ---> [*] Build/install c++ compiler and libstdc++? [*] Build/install a shared libgcc?
Config
- After all these checks, activate libts package in Buildroot configuration:
$ make menuconfig
$ make
- Or compile it directly:
$ make tslib
Configuration details (some are automatically done)
Config file
- To work, Tslib needs a valid config file /etc/ts.conf:
# cat /etc/ts.conf module_raw input module pthres pmin=1 module variance delta=30 module dejitter delta=100 module linear
Envt variables
- You should define some ENVT variables too:
export TSLIB_TSDEVICE=/dev/input/event0 export TSLIB_TSEVENTTYPE=INPUT export TSLIB_CONFFILE=/etc/ts.conf export TSLIB_CALIBFILE=/etc/pointercal
Device file
- /dev/input/event0 is created from the infos got from:
# cat /sys/class/input/event0/dev 13:64 # mkdir /dev/input # cd /dev/input/ # mknod event0 c 13 64 # ls -al drwxr-xr-x 2 root root 0 Jan 1 00:39 . drwxr-xr-x 5 root root 0 Jan 1 00:39 .. crw-r--r-- 1 root root 13, 64 Jan 1 00:39 event0 #
Calibration
- /etc/pointercal is created when running Tslib calibration tool:
# /usr/bin/ts_calibrate
Testing it
# /usr/bin/ts_test
Adding Tslib support to SDL
SDL is by default compiled with Tslib support in current Buildroot distribution. You just have to make SDL knows the presence of Tslib when launching your application:
export SDL_MOUSEDRV=TSLIB export SDL_MOUSEDEV=$TSLIB_TSDEVICE export SDL_NOMOUSE=1
Adding Tslib support to Qt
Work in progress...
