ESP32 开发笔记（七）LittlevGL PC Simulator 配置

LittlevGL PC Simulator 配置

视频教程：How to Run Littlev Graphics Library in PC Simulator (Linux)

PC simulator

You can try out the Littlev Graphics Library using only your PC without any development board. Write a code, run it on the PC and see the result on the monitor. It is cross-platform: Windows, Linux and OSX is also supported!

• Needs only few minutes setup
• Costs $0. No PCB cost and no pay for any software
• A TFT display is simulated and shown on the monitor of your PC
• The touch pad is replaced by your mouse
• The written code is portable, you can simply copy it when using an embedded hardware

配置流程

Install Eclipse CDT

Eclipse CDT is C/C++ IDE. You can use other IDEs as well but in this tutorial the configuration for Eclipse CDT is shown.
Eclipse is a Java based software therefore be sure Jave Runtime Environment is installed on your system.
On linux: sudo apt-get install default-jre
You can download Eclipse’s CDT from: https://eclipse.org/cdt/. Start the nstaller and choose Eclipse CDT from the list

Install SDL 2

The PC simulator uses the SDL 2 cross platform library to simulate a TFT display and a touch pad.

Linux

On Linux you can easily install SDL2 using a terminal:

1. Find the current version of SDL2: apt-cache search libsdl2 (e.g. libsdl2-2.0-0)
2. Install SDL2: sudo apt-get install libsdl2-2.0-0 (replace with the found version)
3. Install SDL2 developement package: sudo apt-get install libsdl2-dev
4. If build essentials are not installed yet: sudo apt-get install build-essential

Windows

If you are using Windows firstly you need to install MinGW (64 bit version). After it do the following steps to add SDL2:

1. Download the development libraries of SDL. Go to https://www.libsdl.org/download-2.0.php and download Development Libraries: SDL2-devel-2.0.5-mingw.tar.gz
2. Uncompress the file and go to x86_64-w64-mingw32 directory (for 64 bit MinGW) or to i686-w64-mingw32 (for 32 bit MinGW)
3. Copy …_mingw32/include/SDL2 folder to C:/MinGW/…/x86_64-w64-mingw32/include
4. Copy …_mingw32/lib/ content to C:/MinGW/…/x86_64-w64-mingw32/lib
5. Copy …_mingw32/bin/SDL2.dll to {eclipse_worksapce}/pc_simulator/Debug/. Do it later when Eclipse is installed.

Note: If you will use Microsoft Visual Studio instead of Eclipse then you don’t have to install MinGW.

OSX

On OSX you can easily install SDL2 with brew: brew install sdl2

If something is not worging I suggest this tutorial to get statered with SDL

Pre-configured project

A pre-configured graphics library project (based on the lates release) is always available in PC simulator project. You can find it on GitHub or on the Download page. The project is configured for Eclipse CDT.

##Add the pre-configured project to Eclipse CDT
Run Eclipse CDT. It will show a dialogue about the workspace path. Before accepting it check that path and copy (and unzip) the downloaded pre-configured project there. Now you can accept the workspace path. Of course you can modify this path but in that case copy the projct to the that location.

Close the start up window and go to File->Import and choose General->Existing project into Workspace.
Browse the root directory of the project and click Finish

On Windows you have to do two additional things:

• Copy the SDL2.dll into the project’s Debug folder
• Righ click on the project -> Project properties -> C/C++ Build -> Settings -> Libraries -> Add … and add mingw32 above SDLmain and SDL. (The order is important: mingw32, SDLmain, SDL)

Compile and Run

Now you are ready to run the Littlev Graphics Library on your PC. Click on the Hammer Icon on the top menu bar to Build the project. If you have done everything right you will not get any errors. Note that on some systems additional steps might be required to “see” SDL 2 from Eclipse but in most of cases the configurtions in the downloaded project is enough.

After a success build click on the Play button on the top menu bar to run the project. Now a window should appear in the middle of your screen

Now everything is ready to use the Littlev Graphics Library in the practice or begin the developement on your PC.