Export UI to Linux Frame Buffer with LVGLv9

How to
1

What do you want to achieve?

I want to export a UI I have built in SLS to an Ubuntu VM. The VM has LVGL 9 running.

What have you tried so far?

I have got the demo for LVGL 9 working.
I then designed and exported the UI, following instructions in the docs (put in folder beside lvgl, include ui.h, call lv_init, call ui_init etc)
However when I build the project I get undefined reference error to ui_init().
If I then include ui.c this error no longer shows but multiple other undefined references appear.
Is there some change required to the CMakeLists.txt file for the project

Screenshot or video

Screenshot 2024-01-19 105216
Screenshot 2024-01-19 105216987×433 6.49 KB

Others

  • SquareLine Studio version: 1.3.4
  • Operating system: SLS on Windows. Running exported code on Ubuntu.
  • Target hardware: Linux Frame Buffer
2

SquareLine Studio v1 doesn’t support LVGL9 compatible export now. LVGL9 has went through a major API change with many new features, and is not totally backwards-compatible with LVGL8.

3

Ah, I was afraid of as much, thanks for getting back to me. I don’t suppose there’s a conversion script available to update 8.3.6 code to 9?

4

There’s a ChangeLog describing the API-changes: Changelog — LVGL documentation
We’re not aware of any v8->v9 converters, but SquareLine Studio v2 will be able to export LVGL-v9 code, until that I guess you can ask if a converter exists or is planned, in LVGL forum or GitHub-discussion, e.g.: Changes in master (v9 development) · Issue #4011 · lvgl/lvgl · GitHub , v9 discussion and changes · Issue #3298 · lvgl/lvgl · GitHub

5

Thanks, when is SLS v2 due?

6

This .h file might help in the ‘conversion’ between LVGL v8 and v9 codes: