Problem using lvgl in custom thread

RE: Problem using lvgl in custom thread

Kazi Afroza Sultana — Mon, 12 Jun 2023 12:18:37 GMT

Hello Pablo,

You are welcome. I am really glad that it helped.

Thanks.

Kazi

RE: Problem using lvgl in custom thread

Pablosanserr — Mon, 12 Jun 2023 09:46:53 GMT

Thank you, Kazi. It solved the problem.

Regards,
Pablo

RE: Problem using lvgl in custom thread

Kazi Afroza Sultana — Wed, 10 May 2023 13:55:10 GMT

Hello Pablo,

We have reproduced the project and changing STCKSIZE define to 2048 works fine. You have stack size 1024 in your code.

You can have a look this documentation https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/services/debugging/thread-analyzer.html

RE: Problem using lvgl in custom thread

Pablosanserr — Tue, 09 May 2023 09:48:11 GMT

Hi Kazi,

Thanks for your reply. I didn't notice the problem of having a long buffer. Now buff is a global variable.

However, the program keeps restarting. In addition, if I comment out the following line, which assigns ta_event_cb to the textArea, the error remains. Also, I deleted buff.

lv_obj_add_event_cb(ta, ta_event_cb, LV_EVENT_ALL, kb);

The only way I have found to stop it from restarting is to remove the lv_task_handler function, which obviously causes the screen to display nothing.

I attach the updated project, in case it's useful to reproduce the problem.

devzone.nordicsemi.com/.../threads_5F00_sample_5F00_lvgl_5F00_v2.zip

Best regards,
Pablo.

RE: Problem using lvgl in custom thread

Kazi Afroza Sultana — Mon, 08 May 2023 14:00:22 GMT

Hello Pablo,

I have looked at your code. You have defined stack size for each thread is 1024 but in the ta_event_cb() function set buffer size 2048. So, it is most likely stack overflow issue. Large buffers like this should declare either as static or as global. Changing the line char buff [2048] to static char buff[2048] would fix the problem.

You can try that and let us know the consequence.

Thanks.

Kazi

RE: Problem using lvgl in custom thread

Kazi Afroza Sultana — Mon, 08 May 2023 09:35:07 GMT

Hello Pablo,

I have been looking at your case. I will get back to you shortly.

Thanks.

Kazi