Touch Screen Calibration Test

Muhammad Salih

Hi,

I am using TI816x Processor. I need to test the touch screen calibration. But while I trying run the executable ts_calibrate I am getting the below prints.

Couldnt load module input
No raw modules loaded.
ts_config: Success

I don't know what is the problem. Please give me the proper solution to solve this.

Thanks in advance.

Regards,

Salih

over 13 years ago

0 Rachna Patil over 13 years ago

TI__Prodigy 270 points

Hi Salih,

Can you look for "ts.conf" file, usually found at /etc/ts.conf. Check if you have the following entries:

module_raw input
module pthres pmin=1
module variance delta=30
module dejitter delta=100
module linear

If any of these lines in commented, uncomment the same.

Also check if you have the following environment variables set:

export TSLIB_TSDEVICE=/dev/input/event0
export TSLIB_CALIBFILE=/etc/pointercal
export TSLIB_CONFFILE=/etc/ts.conf
export TSLIB_PLUGINDIR=/lib/ts
export TSLIB_FBDEVICE=/dev/fb0
export TSLIB_CONSOLEDEVICE=none

Regards,

Rachna.

0 Muhammad Salih over 13 years ago in reply to Rachna Patil

Expert 2725 points

Hi Rachna,

Can you tell me where I have to set those variables hether in Target or in host while compiling. I set those variables in Target. I am getting the below message. Please give me to how to solve this.

selected device is not a touchscreen I understand

Thanks

Regards,

Salih

0 Muhammad Salih over 13 years ago in reply to Muhammad Salih

Expert 2725 points

Dear Rachna,

Please give me the solution how to solve this problem. I am struggling with this for more than two days

Thanks in advance

Regards,

Salih

0 Rachna Patil over 13 years ago in reply to Muhammad Salih

TI__Prodigy 270 points

Salih,

Check the output of

ls -al /dev/input

Check for the corresponding touchscreen event. This should be set in the environment variable against

export TSLIB_TSDEVICE=/dev/input/event*

You can also find more details regarding tslib at http://processors.wiki.ti.com/index.php/Tslib

Regards,

Rachna

0 Muhammad Salih over 13 years ago in reply to Rachna Patil

Expert 2725 points

Hi Rachna,

I am still getting the same error. I followed the below steps.

root@dm816x-evm:~#
root@dm816x-evm:~# ls -al /dev/input
drwxr-xr-x    2 root     root          120 Jan  1  2000 .
drwxr-xr-x   11 root     root         3500 Jun  1 15:55 ..
crw-r-----    1 root     root      13,  64 Jan  1  2000 event0
crw-r-----    1 root     root      13,  63 Jan  1  2000 mice
crw-r-----    1 root     root      13,  32 Jan  1  2000 mouse0
lrwxrwxrwx    1 root     root            6 Jan  1  2000 touchscreen0 -> event0
root@dm816x-evm:~# export TSLIB_TSDEVICE=/dev/input/event0
root@dm816x-evm:~# export TSLIB_CALIBFILE=/etc/pointercal
root@dm816x-evm:~# export TSLIB_CONFFILE=/etc/ts.conf
root@dm816x-evm:~# export TSLIB_PLUGINDIR=/lib/ts
root@dm816x-evm:~# export TSLIB_FBDEVICE=/dev/fb0
root@dm816x-evm:~# export TSLIB_CONSOLEDEVICE=none
root@dm816x-evm:~#
root@dm816x-evm:~#
root@dm816x-evm:~# ts_calibrate

selected device is not a touchscreen I understand
Took 2 samples...
Top left : X = -548059108 Y = -548058985
Took 2 samples...
Top right : X = -548059108 Y = -548058985
Took 2 samples...
Bot right : X = -548059108 Y = -548058985
Took 2 samples...
Bot left : X = -548059108 Y = -548058985
Took 2 samples...
Center : X = -548059108 Y = -548058985
17.796875 -7.787109 7.785156
12.812500 -4.359375 4.359375
Calibration constants: 1166336 -510336 510208 839680 -285696 285696 65536

root@dm816x-evm:~# ts_test

selected device is not a touchscreen I understand

Please give me the reason and give solution to solve this one.

Thanks in advance.

Regards,

Salih

0 Rachna Patil over 13 years ago in reply to Muhammad Salih

TI__Prodigy 270 points

Salih,

Looks like the tslib your using is old. Can you compile the latest version of tslib which has a specific patch to address the version check condition, I think you are missing this.

You can also try export TSLIB_TSDEVICE=/dev/input/touchscreen0.

Regards,

Rachna

0 Muhammad Salih over 13 years ago in reply to Rachna Patil

Expert 2725 points

Hi Rachna,

Thanks Rachna.

But still I am getting the same. Can you tell me where I can download the latest version of tslib. Do you have any link. If so, please post the links.

Thanks & Regards,

Salih

0 Rachna Patil over 13 years ago in reply to Muhammad Salih

TI__Prodigy 270 points

Salih,

Please refer to my previous replies, or you can also look at http://opentom.org/Tslib

Regards,

Rachna

0 Muhammad Salih over 13 years ago in reply to Rachna Patil

Expert 2725 points

Hi Rachna,

Thanks. The Tslib is working. But while running the ts_calibrate, the resolution is switched to HDMI resolution. So the calibration is not clearly visible in LCD. Please can you tell me how can I solve this problem.

Thanks in advance.

Regards,

Salih

0 Muhammad Salih over 13 years ago in reply to Muhammad Salih

Expert 2725 points

Hi Rachna,

Please can you tell me whether I need to change settings in the driver code. If so please tell me where I need to change. Or if I should give any command line arguments while inserting the module. Please give me the solution for this.

Thanks in advance.

Regards,

Salih

0 Muhammad Salih over 13 years ago in reply to Muhammad Salih

Expert 2725 points

Hi Rachna,

Can you please tell me, where I can change the resolution in driver code as default. Because here it is selecting the resolution as 1080p-60. But I need 800x480@60. How can I change the resolution in driver code. Please give me the solution for this.

Thanks in advance.

Regards,

Salih

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Touch Screen Calibration Test