Hi, I am a beginner with arduino and with programming boards, I have bought an esp32 and have been following a tutorial linked to the board on the waveshare page ( both linked at the bottom ). In this tutorial, there is a 8 demos, all of the demos work on my esp32 other than the LVGL ones, they get an error as they are looking for a file within the wrong directory. No matter what i try, i cannot get anything to display on my esp32 screen, nor can I flash it. If anyone would help me display something on my screen that would be greatly appreciated.
I'll provide instructions you can follow to do that:
This procedure is not intended to solve the problem. The purpose is to gather more information.
Open the problematic demo in Arduino IDE.
Select Sketch > Verify/Compile from the Arduino IDE menus.
Wait for the compilation to fail.
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type or paste codeIn file included from c:/Users/User/Documents/Arduino/libraries/lvgl/src/lv_init.h:16,
from c:/Users/User/Documents/Arduino/libraries/lvgl/lvgl.h:21,
from c:\Users\User\Documents\Arduino\libraries\lvgl\src/lvgl.h:16,
from C:\Users\User\Documents\Arduino\examples\08_LVGL_V9_Test\lvgl_port.c:4:
c:/Users/User/Documents/Arduino/libraries/lvgl/src/lv_conf_internal.h:60:18: fatal error: ../../lv_conf.h: No such file or directory
60 | #include "../../lv_conf.h" /* Else assume lv_conf.h is next to the lvgl folder. */
| ^~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: exit status 1 here
Thanks again for the reply, I have reinstalled Arduino IDE so I can follow your instructions better, I have installed: ESP32 3.2.1 by espressif systems, in boards manager, then lvgl 9.3.0 in library manager. Then under Tools, I have selected the correct COM slot, and ESP32S3 Dev Module under board, then enabled USB CDC on boot. Then I downloaded, extracted, and moved everything under 'Arduino' ( from the demo ) into my existing 'Arduino' folder, this includes libraries, examples, and therefore the lv_conf.h file under lvgl9. Next I moved the file: 'lvgl9/lv_conf.h' into the directory you suggested. Then I ran the example under Arduino/08_LVGL_V9_Test/08_LVGL_V9_Test.ino ( which was imported from the provided demo folder which I linked in the original post.) which has solved the original error, but in turn provided a new error: `C:\Users\bubbl\Documents\Arduino\examples\08_LVGL_V9_Test\lvgl_port.c:13:10: fatal error: demos/lv_demos.h: No such file or directory
13 | #include "demos/lv_demos.h"
| ^~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: demos/lv_demos.h: No such file or directory`
EDIT: Im not sure why the original error message didn't send in a code block, here it is again, also, I believe the file it is reffering to is located in:
C:\Users\User\Downloads\ESP32-S3-LCD-3.16-Demo\ESP32-S3-LCD-3.16-Demo\Arduino\libraries\lvgl9\lvgl\demos.
:\Users\User\Documents\Arduino\examples\08_LVGL_V9_Test\lvgl_port.c:13:10: fatal error: demos/lv_demos.h: No such file or directory
13 | #include "demos/lv_demos.h"
| ^~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: demos/lv_demos.h: No such file or directory
If you installed it from library manager instead of using the downloaded lvgl9/lvgl, you need to set up the demos folder.
Follow the instructions at "Use the examples and demos" section in the reference page posted in post #4.
important:
Due to some the limitations of Arduino's build system you need to copy lvgl/examples to lvgl/src/examples. Similarly for the demos lvgl/demos to lvgl/src/demos.
Sorry, i don't fully understand what you're saying, I have read the referenced instructions, I am using a demo which has a .ino file so I don't think I should need to load using the 'lv_example' function? Anyway, I have copied the demos and example folder into the directory you suggested, I wasn't sure if this was in the Arduino/Libraries or Arduino/Examples directory, so I did both. However I am still getting the same error, in the directory: C:\Users\User\Documents\Arduino\libraries\lvgl9\lvgl\src, my folder now looks like this:
I see now, i have copied 'demos' into the correct directory now, this has solved the error, now I am presented with a new error:
In file included from c:\Users\bubbl\Documents\Arduino\libraries\lvgl\src/demos/lv_demos.h:35,
from C:\Users\bubbl\Documents\Arduino\examples\08_LVGL_V9_Test\lvgl_port.c:13:
c:\Users\bubbl\Documents\Arduino\libraries\lvgl\src/demos/widgets/lv_demo_widgets.h:17:10: fatal error: ../../src/draw/lv_draw.h: No such file or directory
17 | #include "../../src/draw/lv_draw.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: exit status 1
the file 'lv_draw.h' is located in: C:\Users\User\Documents\Arduino\libraries\lvgl\src\draw
Thank you again, this has solved that error, however once again a new error has occured:
C:\Users\User\Documents\Arduino\examples\08_LVGL_V9_Test\src\demos\benchmark\assets\img_benchmark_cogwheel_alpha16.c:1:10: fatal error: ../../../lvgl.h: No such file or directory
1 | #include "../../../lvgl.h"
| ^~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: ../../../lvgl.h: No such file or directory```
Unfortunately, I can't find img_benchmark_cogwheel_alpha16.c under the Arduino\examples\08_LVGL_V9_Test\src\demos\benchmark\assets\ which downloaded from Waveshare.
Anyway, #include "../../../lvgl.h" should be #include "lvgl.h" if img_benchmark_cogwheel_alpha16.c is not located in the lvgl library folder.
That's strange, I cannot find a file named 'img_benchmark_cogwheel_alpha16.c'in that directory either, this may be a silly question, but where should i change '#include "../../../lvgl.h' to '#include "lvgl.h"'?
EDIT: I searched for the file, and it is found in 3 instances, all of them under lvgl8, the demo I am running is using lvgl9, so I'm not sure why i'm getting this error?
I thought that, however there isn't a file with that name in that directory?, however there is files with the same name under lvgl8 in multiple locations, which of them should I edit?
They are found in these directories:
C:\Users\User\Documents\Arduino\libraries\lvgl8\lvgl\src\demos\benchmark\assets
C:\Users\User\Documents\Arduino\libraries\lvgl8\lvgl\demos\benchmark\assets
C:\Users\User\Documents\Arduino\examples\08_LVGL_V9_Test\src\demos\benchmark\assets
I have changed the file in all of those locations, however I am still getting the error, it looks like the file is made when the program runs? I am going to look at the directory in file explorer and verify the program to see what happens.
EDIT: The file name nkeeps changing, but with the same error, I am going to keep replacing the directory it is looking at with the one you said, I will reply when I get stuck on an error.
Okay, thanks for this, it appears there is many more files with the wrong referenced directory inside, I am changing them all over to #include "lvgl.h" rather than #include "../../../lvgl.h"
This procedure is not intended to solve the problem. The purpose is to gather more information.
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