TSLib ported to Android for touchscreen calibration.

     Since Android doesn't provide a calibration tool, tslib can be used to calibrate the touchscreen . The values obtained from ts_calibrate in pointercal file can be used in android frameworks/services/java/com/android/server/InputDevice.java to have the correct screen coordinates.

ts_calibrate can be run from a serial console along with android with the proper environment variables set (these variables are documented in Android.mk too), the default values are:



export TSLIB_TSDEVICE=/dev/input/event1
export TSLIB_CONFFILE=/system/etc/ts.conf
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_PLUGINDIR=/system/lib
export TSLIB_CONSOLEDEVICE=/dev/tty
export TSLIB_FBDEVICE=/dev/graphics/fb0


To compile tslib for your device make a link for bionic/libc/include/fcntl.h to bionic/libc/include/sys/fcntl.h import build/envsetup.sh and execute make or m.

To make tslib build everytime you build your android distribution copy the android-tslib folder to android external/ folder.

Download:
GIT:   android-tslib

Labels: android

9 Comments:

At December 20, 2010 at 3:41 AM ,  phking said...

thank you ^^

 

At August 2, 2011 at 9:04 PM ,  CloudHackIX said...

Thank you SO much! I've been struggling for several days now trying to figure out why my touchscreen wasn't working under Android. Works like a charm now!

 

At October 22, 2011 at 1:03 AM ,  Krishnan said...

Thanks for the post. Could you tell me how to use the pointercal values in inputdevice.java? I am not quite aware of what the values from pointercal file means. There is no good documentation on that.

 

At October 26, 2011 at 5:56 PM ,  PaNiC said...

@Sarav see the patch below:

https://gitorious.org/picopc-android-eclair/frameworks-base/commit/326606175898417d709da3a5958bd0a2696534e5

 

At January 6, 2012 at 8:31 PM ,  Aaron said...

What android device were you using? A phone?

 

At February 24, 2012 at 6:44 PM ,  monimi said...

Hi, i have been trying to compile the tslib for android, but i get an error with dlclose, dlsym, dlopen, i'm stuck in here, i don't know what else to do, apparently the android.mk is fine, is the one that comes with the tslib, i modifyed the variables and the LOCAL_MODULE_TAGS, i don't know what to do to solve the problem.

 

At November 24, 2012 at 5:02 PM ,  Joe said...

Hi,

when I try to build Android with tslib I get this error:

build/core/base_rules.mk:166: *** external/bluetooth/bluez/input: MODULE.TARGET.SHARED_LIBRARIES.input already defined by external/android-tslib.

Can you please help me?

 

At November 24, 2012 at 5:03 PM ,  Joe said...

Hi,

when I try to compile Android with tslib I get this error:

build/core/base_rules.mk:166: *** external/bluetooth/bluez/input: MODULE.TARGET.SHARED_LIBRARIES.input already defined by external/android-tslib.

Can you please help me?

 

At February 27, 2013 at 3:42 PM ,  Unknown said...

Hi,

I'm not able to get tslib working with Anroid Honeycomb. I'm able to compile all without any issues, and also included the requied ts.conf file.
However when i try "ts_calibrate" i'm seeing
Failed to open settings file: No such file or directory
trying configured TSDEVICE '/dev/input/event0'
Failed to open settings file: No such file or directory

And after this nothing happens atall

 

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