why compilation result got error ....undefined reference to `lv_scr_load_anim' ....

[baeosk103]

Hi

I download the CYD_practice_projects folder from Github and start learning with your good you tube tutorial. I move the EEZ_arc_events folder which they are all completed with your several ui files from eez and the EEZ_arc_events.ino.

My environment is

• arduino Ide is version 2.3.3
• my lvgl is version 9.0 and
• the TFT-ESPI is version 2.5.43
• My practice lesson : EEZ_arc_events folder

my notebook work on the compiling for a few minutes , I get the error compiling message as following.

c:/users/admin/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: sketch\objs.a(ui.c.o):(.literal.loadScreen+0x4): undefined reference to lv_scr_load_anim' c:/users/admin/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld.exe: sketch\objs.a(ui.c.o): in functionloadScreen':

C:\Users\Admin\Documents\Arduino\EEZ_arc_events/ui.c:51: undefined reference to `lv_scr_load_anim' collect2.exe: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1

I am new for the EEZ -LVGL so I need some advise for the reason why the system compiIation show error message and how can I fix this errors.

I try on the another practice example in the folder ,they also show me the same error message...undefined reference to `lv_scr_load_anim' ...

My questions are

1. Are the error from my environment /versions of the system
2. Are the error from the specific setup of any ui-file from the EZZ
3. Are the error from the lv_conf.h file of the lvgl
4. Are the error from the lv_scr_load_anim configuration parameter

Your help and advise will be very appreciated.

Thanks "My dream will happen"

[nu1504ta0609sa0902]

I'm a beginner my self so don't know what that error means.

All I can say is update to lvgl 9.1 and than copy lv_conf_template file and rename it to lv_conf.

See here for more details on how to configure it: https://randomnerdtutorials.com/lvgl-cheap-yellow-display-esp32-2432s028r/

If you can get the example working there all the rest will work.

[nu1504ta0609sa0902]

Hope the above works.

[baeosk103]

Great , I will try and update the status...

Thanks

[baeosk103]

Hi,

I test with LVGL9.1 , they are perfect .

.... I can fly....My dream come true....

Cheers