Problems building tslib for BB-View_4.3

One more thing, since you use the same screen

Apart from that build issue, did you have any other issues with this screen?

I have pointer "jitter" problem most of the time. Mouse pointer jumps to the right of the screen by itself, and it happens more if something white/light is displayed on the screen.

Dragan

In my ~/qt-bbb/tslib/lib I have libts-1.0.so.0.0.0 and a couple of other similarly named files.  There is one file that is named tslib with no extension. It's about 6.7K in size.  At the risk of sounding like the dullest knife in the drawer, Is that what I'm looking for??

As far as the mouse pointer is concerned, it's not smooth at all.  I was just happy to get it functioning and would try and take care of that later.

Regards,

Mark

Hi Mark, thanks for replying.

I see just now that you're looking for tslib.so and not libts.so. Is that right, or just a typo?

As for the libts.so, I see that you have it in line 6 of your ls command output.

No, libts.so is the Symbolic link - Wikipedia, the free encyclopedia. This is just a kind of a shortcut file (it's somewhat similar to shortcuts on Windows if you're more familiar with them) .

Dragan

Hi Dragan,

My apologies for not being clearer.  Yes, that is correct I'm looking for tslib.so.

Regards,

Mark

Mark,

I'm not sure such a library file is being built. Where did you find that you need to have it?

AFAIK, touch screen library .so is called libts.so (this is standard library naming convention, check 3.1.1 here -> Shared Libraries).

Regards,

Dragan

Hi Dragan,

I guess I wrongly assumed that tslib.so was the name of the lib being produced by the build.  Thanks for the article, I'll dig into that.

So, libts.so contains all of the methods listed in tslib.h??   I now realize that it's a convention but you can see my confusion.

When I originally tried to run ts_calibrate on my beaglebone it complained that it couldn't find things like ts_open, etc.  If the actual lib

I need is libts.so then maybe it was some environment variables not being set correctly. I'll try again.

Regards,

Mark

For a list of exported functions you can use:

nm -D -C -g libts.so

Are you sure you have it installed on BBB as you supposed to (scp ... lines in your original guide)? Read 3.1.2 in the same link

Cheers,

Dragan

Ok, the BBB must be finding the library when I run ts_calibrate.  Looking at the ts_calibrate code I see that it does a check on ts_open that it passes.  However it can't find ts_config and it errors out.  So this is a different issue. I'll look into why I don't have a ts_config.

Regards,

Mark

That's a start. Good luck with resolving it.

Dragan

FYI,

I've now got the ts_calibrate function running.  Not working correctly just yet but I'll figure it out.

It seems that the issue I was having was the environment variables were not getting set on the BBB. In the

procedure it said to edit "sudo nano /etc/environment" and add what was listed and reboot.  Environment

wasn't getting picked up during boot and not set.  When I set them by hand the app worked.

Thanks for the help.

Regards,

Mark

I'm glad it finally worked for you!

Thank you for sharing your discovery.

This discussion should be moved to the correct section (beaglebone or embedded computers).

Dragan

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