Help with freeRTOS and lvgl

[brightproject]

Hello @mr-sven 😀
I saw your example code for working with the display and the LVGL library.
I am interested in the lv_lock() and lv_unlock() functions

esp32-8048S050C/main/main.c

Line 17 in 39bf706

lv_lock();

Could you please help me explain what these mechanisms are, are they built into LVGL or are these your functions?
I am also trying to figure out how to run the example on LVGL and my display, with QSPI bus

This issue:

lvgl/lvgl#145 (comment)

My code is based on an example taken from here:

https://github.com/lvgl/lv_port_esp32/blob/master/main/main.c

It uses a MUTEX that I would like to understand, and I think I will do it very soon.
I will be happy to have engineering discussions with you;

[mr-sven]

Hi, nice displays.
lv_lock and lv_unlock is required on multithreaded systems to stop buffer reading on update.
So if you start a FreeRTOS Task to update your animation, you have to lock and unlock the lvgl mutex.

[brightproject]

lv_lock and lv_unlock is required on multithreaded systems to stop buffer reading on update.

Thanks for the answers, but unfortunately, the functions:

    lv_lock();
    lv_unlock();

are useless, and setting up LVGL and RTOS is a very difficult task.
Your example is just pseudocode😀

[mr-sven]

Ahm, what exactly you mean with useless and pseudocode? It uses a mutex and executes xSemaphoreTake to lock the drawing task.
The only problem is at the moment if you use dual frame buffer, it might flicker a bit.