Attempts to run the simulator in WIN10 on WSL1

[brightproject]

When I compile the code, everything goes great.

• Executing task in folder lv_platformio: platformio run

Processing emulator_64bits (platform: native@^1.1.3)

Verbose mode can be enabled via -v, --verbose option LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf LDF Modes: Finder ~ chain, Compatibility ~ soft Found 1 compatible libraries Scanning dependencies... Dependency Graph |-- lvgl @ 9.1.0 Building in release mode `.pio/build/emulator_64bits/program' is up to date. ============================= [SUCCESS] Took 3.73 seconds =============================

Environment Status Duration

---

emulator_64bits SUCCESS 00:00:03.734 ============================= 1 succeeded in 00:00:03.734 =============================

• Terminal will be reused by tasks, press any key to close it.

When I follow the instructions build/execute

https://github.com/lvgl/lv_platformio?tab=readme-ov-file#buildrun

I get an error

• Executing task in folder lv_platformio: platformio run --target upload --environment emulator_64bits

Processing emulator_64bits (platform: native@^1.1.3)

Verbose mode can be enabled via -v, --verbose option LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf LDF Modes: Finder ~ chain, Compatibility ~ soft Found 1 compatible libraries Scanning dependencies... Dependency Graph |-- lvgl @ 9.1.0 Building in release mode Configuring upload protocol... Executing .pio/build/emulator_64bits/program error: XDG_RUNTIME_DIR not set in the environment. error: XDG_RUNTIME_DIR not set in the environment.

Previously I tried to run

https://github.com/lvgl/lv_platformio

In Windows on vscode, and there, when building the project, I got the following errors:

Compiling .pio\build\emulator_64bits\libe9a\lvgl\drivers\sdl\lv_sdl_keyboard.o Compiling .pio\build\emulator_64bits\libe9a\lvgl\drivers\sdl\lv_sdl_mouse.o : fatal error: SDL2/SDL.h: No such file or directory compilation terminated. *** [.pio\build\emulator_64bits\libe9a\lvgl\drivers\sdl\lv_sdl_keyboard.o] Error 1 : fatal error: SDL2/SDL.h: No such file or directory compilation terminated. *** [.pio\build\emulator_64bits\libe9a\lvgl\drivers\sdl\lv_sdl_mouse.o] Error 1 ============================== [FAILED] Took 11.69 seconds ==============================

Environment Status Duration

---

emulator_64bits FAILED 00:00:11.690 ============================== 1 failed, 0 succeeded in 00:00:11.690 ==============================

Here it is clearly visible that the compiler cannot find the path to SDL2, although I know for sure that SDL2 is installed on the PC with Windows, because I successfully run SDL2 in another simulator

https://github.com/lvgl/lv_port_pc_vscode

I would be glad if someone knows the solution to the problems and tells me how to solve them.

It's just that another simulator is created for projects under lvgl 9.3 and does not allow running codes for Arduino. P.S. In general, all my attempts to run my examples run into one or another problem, it's already becoming uninteresting and soon the enthusiasm will disappear, everything is too confusing and crooked.

[fbiego]

Hello @brightproject Can you try below; replace https://github.com/lvgl/lv_platformio/blob/7b6b7b2d0cceb449292dde1fe69e37d97d70d86a/platformio.ini#L48 with the SDL relative path

; -L C:/msys64/mingw64/lib/ ; also try with this uncommented
-D SDL_INCLUDE_PATH="\"C:/msys64/mingw64/include/SDL2/SDL.h\""

and also replace https://github.com/lvgl/lv_platformio/blob/7b6b7b2d0cceb449292dde1fe69e37d97d70d86a/hal/sdl2/app_hal.c#L3 with

#include SDL_INCLUDE_PATH

[brightproject]

Hello @fbiego 🙂 Thank you for your help, but unfortunately I still couldn't run lv_platformio in the Linux subsystem on Windows WSL. Vscode itself runs great using a command in the bash

code .

In vscode I compile firmware for Arduino, including the lv_platformio, which I already wrote about above. But unfortunately, apparently my wsl does not see the folders:

C:/msys64/mingw64/include/SDL2/SDL.h

I also tried to put the whole folder in the wsl

-D SDL_INCLUDE_PATH="".home/user/Documents/Projects/lv_platformio/msys64/mingw64/include/SDL2/SDL.h""

But this did not help, so I stayed with the working

vscode + windows 10 + lv_platformio + mingw64 + sdl2

I made a short video, basically duplicating the manual here for `Windows 10:

https://github.com/lvgl/lv_platformio?tab=readme-ov-file#install-sdl-drivers

But the manual does not indicate that installation via pacman should be done after installing and running mingw64. It also doesn't show how to add the path to mingw64 in the Windows PATH environment variable.

Unfortunately, I also forgot to include this in the video, so I'll write it in text:.

1. Press WIN + R
2. Enter the command sysdm.cpl and go to the ADDITIONAL tab
3. Click on ENVIRONMENT VARIABLES
4. Click on Path in the upper window, where the user environment variables for Admin
5. In the window that appears, add to the free bottom line C:\msys64\mingw64\bin and click OK and close. After that, restart the vscode and everything as in the video - EXECUTE and a window with the LVGS simulator will appear. Thank you for your attention.

https://www.youtube.com/watch?v=AZl9oFWWZUs

[brightproject]

Hello @fbiego 🙂 Is there any way to run this code examples in lvgl 8.3.11?

I was planning to run some of my projects for version lvgl 8.3.11 in the simulator, but I ran into a problem with the lack of sdl2 drivers for version lvgl 8.3.11.

Comparing the version repositories, it becomes clear that for lvgl 8.3.11 there apparently were no sdl2 or drivers yet.

https://github.com/lvgl/lvgl/tree/release/v8.3/src

and

https://github.com/lvgl/lvgl/tree/release/v9.3/src

At the same time, the project

https://github.com/m5stack/lv_m5_emulator/

Allows you to run version 8.3 and 9.3 by simply switching the settings in platformio.ini

[fbiego]

in v8 the sdl drivers were not included in the library, check the repo here before it was updated to v9

https://github.com/lvgl/lv_platformio/tree/b68b2d8e230840b7a10a16cd591ffede02f422a4

[brightproject]

in v8 the sdl drivers were not included in the library, check the repo here before it was updated to v9

https://github.com/lvgl/lv_platformio/tree/b68b2d8e230840b7a10a16cd591ffede02f422a4

Thank you. Is this a repository for version 8.3? For some reason I didn't find any releases by version.

https://github.com/lvgl/lv_platformio/releases

[brightproject]

Hello @brightproject

Good day @fbiego

Could you tell me please, how to correctly add my code to the main file of the lv_platformio simulator to animate and animate some of the objects I drew?

In the case of ready-made examples, this is done by simply adding a function, for example:

int main(void)
{
	lv_init();

	hal_setup();

        lv_demo_music();

	hal_loop();
}

in the main loop of the main file and the project works and everything moves.

In the classic application and the code that I write to load onto a real hardware device, I have an Arduino environment for building the code, its format is well-known:

#include <Arduino.h>

void setup() {

}

void loop() {

}

It is present in the main project file

https://github.com/lvgl/lv_platformio/blob/7b6b7b2d0cceb449292dde1fe69e37d97d70d86a/src/main.cpp#L17

and it can even be connected by uncommenting the preprocessor directive

#define ARDUINO

But I couldn't do it, because when compiling code not for real hardware, you need a library

#include <Arduino.h>

In general, I'm interested in running my code in a loop

int main(void)
{

}

Let's say, as I wrote earlier, for real hardware I write code like this:

#include "Arduino.h"
#include <ui.h>

#define TEST

#ifdef TEST

const int min_speed = 10; // Minimum value for speed
const int max_speed = 100; // Maximum value for speed
const int increment_speed = 1; // Increment step
int direction_speed = 1; // Direction of speed change

#endif

void setSpeed(int speed, int *a, int *b) {

  // Set values ​​with a difference of ±1 from the set speed
  *a = speed - 1; // speedFrom
  *b = speed + 1; // speedTo

}

static void PFD_Widget_TaskInit(void)
{

  // static void PFD_Widget_TaskInit(void *pvParameters)
  setSpeed(speed, &speedFrom, &speedTo);
  lv_arc_set_bg_angles(ui_SpeedARC, speedToAngleArc(speedFrom), speedToAngleArc(speedTo));

}

void setup()
{

  ui_init();

} // SETUP

void loop()
{

  #ifdef TEST

  speed += increment_speed * direction_speed;

  if (speed >= max_speed) {

    direction_speed = -1; // Change to decrease

  } else if (speed <= min_speed) {

    direction_speed = 1; // Change to increase

  }

  PFD_Widget_TaskInit();

} // LOOP

That is, earlier my code in a loop incremented and decremented the value of some variable, in this case speed, and substituted it into the value of the object drawing function, which was responsible for drawing the speed arrow

lv_arc_set_bg_angles

Now I don’t understand how to use the simulator, I tried by analogy to place my code from the setup section into the hal_setup() section, and from the loop section into the hal_loop() section; Adding the path to my UI to the app_hal.c file

#include <ui.h>

To sum up what I have written, at the moment I can only run examples from the LVGL library, animated with moving graphics and very beautiful, and my examples of UI without movement.

This is roughly how it looks on real hardware

https://github.com/user-attachments/assets/4c9062ff-0bcc-4900-91a1-59aad1c0d298

But I really want to check the work of my UI in motion with animations in the LVGL simulator🙂

[fbiego]

Arduino uses setup() and loop() instead of the standard main() function in C. That’s why there’s an #ifdef ARDUINO block, it separates code for Arduino hardware from code for the simulator.

You need to call UI functions inside the Arduino block when running on hardware and in the other block when running in the simulator.

While you can technically use int main() on Arduino, Arduino already defines it along with its own initialization and loop handling. This means you lose the custom handling, which breaks Arduino functionality https://community.platformio.org/t/standard-c-program-structure/12947

[brightproject]

Yes, thank you for your response🙂 I understand the difference between the Arduino structures and the classic scheme with

int main(int argc, char **argv)
{
  while(1) {

  }
}

My question was how to set your own logic for the application in the simulator so that it all works in an infinite loop. After all, I need to put the code, for example, an increment of some value in

hal_loop();

I do this and do not get the desired result. The structure of the simulator is very confusing and unclear. Now I can only run examples from the demo and some third-party projects in it that use animation based on LVGL functions, such as

lv_timer_create

Which work from the SETUP section.

[fbiego]

You can also add code to the loop https://github.com/lvgl/lv_platformio/blob/7b6b7b2d0cceb449292dde1fe69e37d97d70d86a/hal/sdl2/app_hal.c#L51-L57

In this project, I use main.cpp as the entry point, then lvgl, ui, and other things are handled separately. The UI folder is shared https://github.com/fbiego/windows-10-mobile-lvgl/blob/main/src/main.cpp