【树莓派5 测评】 + 21.LVGL的仿真体验（zmj）

赵美京?????

【树莓派5 测评】 + 21.LVGL的仿真体验（zmj）


1.        LVGL简介

LVGL的作者是来自匈牙利的Gabor Kiss-Vamosikisvegabor，LVGL用C语言编写，以实现最大的兼容性（与C ++兼容），模拟器可在没有嵌入式硬件的PC上启动嵌入式GUI设计，同时LVGL作为一个图形库，它自带着接近三十多种小工具可以供开发者使用。这些强大的构建块按钮搭配上带有非常丝滑的动画以及可以做到平滑滚动的高级图形，同时兼具着不高的配置要求以及开源属性，显著的优势使得LVGL蔚然成风，成为广大开发者在选择GUI时的第一选择。

1. //------LVGL官网
   
2. https://docs.lvgl.io/master/
   
3. //------LVGL代码仓库
   
4. https://github.com/orgs/lvgl
   
5. //------LVGL仿真模拟器：lv_port_pc_vscode
   
6. https://github.com/lvgl/lv_port_pc_vscode

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2.        LVGL仿真测试

LVGL官方推荐使用VS模拟器进行仿真测试：

• Simulator project for LVGL embedded GUI Library：https://github.com/lvgl/lv_port_pc_vscode
  
  

LVGL测试流程：安装依赖、下载lv_sim_vscode_sdl、编译、测试。

详细指令如下：

1. //------LVGL测试指令
   
2. //---安装依赖
   
3. sudo apt-get update && sudo apt-get install -y build-essential libsdl2-dev
   
4. //---下载lv_sim_vscode_sdl
   
5. git clone --recursive https://github.com/lvgl/lv_sim_vscode_sdl
   
6. //---编译
   
7. cd lv_sim_vscode_sdl
   
8. cmake ./
   
9. make
   
10. //---测试demo
    
11. cd bin
    
12. ./main
    
13. //------详细Log信息
    
14. zhaomeijing@raspberrypi5:~/workspace/21_lvgl$ \
    
15. sudo apt-get update && sudo apt-get install -y build-essential libsdl2-dev
    
16. zhaomeijing@raspberrypi5:~/workspace/21_lvgl$ \
    
17. git clone --recursive https://github.com/lvgl/lv_sim_vscode_sdl
    
18. zhaomeijing@raspberrypi5:~/workspace/21_lvgl$ cd lv_sim_vscode_sdl
    
19. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ ll
    
20. total 76
    
21. drwxr-xr-x  5 zhaomeijing zhaomeijing  4096 May  6 16:50 ./
    
22. drwxr-xr-x  3 zhaomeijing zhaomeijing  4096 May  6 17:54 ../
    
23. -rw-r--r--  1 zhaomeijing zhaomeijing  3347 May  6 16:50 CMakeLists.txt
    
24. drwxr-xr-x  9 zhaomeijing zhaomeijing  4096 May  6 16:50 .git/
    
25. -rw-r--r--  1 zhaomeijing zhaomeijing   176 May  6 16:50 .gitignore
    
26. -rw-r--r--  1 zhaomeijing zhaomeijing   162 May  6 16:50 .gitmodules
    
27. -rw-r--r--  1 zhaomeijing zhaomeijing  1083 May  6 16:50 licence.txt
    
28. -rw-r--r--  1 zhaomeijing zhaomeijing 31682 May  6 16:50 lv_conf.h
    
29. drwxr-xr-x 11 zhaomeijing zhaomeijing  4096 May  6 16:52 lvgl/
    
30. drwxr-xr-x  3 zhaomeijing zhaomeijing  4096 May  6 16:50 main/
    
31. -rw-r--r--  1 zhaomeijing zhaomeijing  2156 May  6 16:50 README.md
    
32. -rw-r--r--  1 zhaomeijing zhaomeijing  1631 May  6 16:50 simulator.code-workspace
    
33. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ cmake ./
    
34. -- The C compiler identification is GNU 12.2.0
    
35. -- The CXX compiler identification is GNU 12.2.0
    
36. -- Detecting C compiler ABI info
    
37. -- Detecting C compiler ABI info - done
    
38. -- Check for working C compiler: /usr/bin/cc - skipped
    
39. -- Detecting C compile features
    
40. -- Detecting C compile features - done
    
41. -- Detecting CXX compiler ABI info
    
42. -- Detecting CXX compiler ABI info - done
    
43. -- Check for working CXX compiler: /usr/bin/c++ - skipped
    
44. -- Detecting CXX compile features
    
45. -- Detecting CXX compile features - done
    
46. -- The ASM compiler identification is GNU
    
47. -- Found assembler: /usr/bin/cc
    
48. -- Configuring done
    
49. -- Generating done
    
50. -- Build files have been written to: /home/zhaomeijing/workspace/21_lvgl/lv_sim_vscode_sdl
    
51. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ ll
    
52. total 124
    
53. drwxr-xr-x  8 zhaomeijing zhaomeijing  4096 May  6 17:20 ./
    
54. drwxr-xr-x  5 zhaomeijing zhaomeijing  4096 May  6 17:18 ../
    
55. drwxr-xr-x  2 zhaomeijing zhaomeijing  4096 May  6 17:20 bin/
    
56. -rw-r--r--  1 zhaomeijing zhaomeijing 16436 May  6 17:20 CMakeCache.txt
    
57. drwxr-xr-x  7 zhaomeijing zhaomeijing  4096 May  6 17:20 CMakeFiles/
    
58. -rw-r--r--  1 zhaomeijing zhaomeijing  1865 May  6 17:20 cmake_install.cmake
    
59. -rw-r--r--  1 zhaomeijing zhaomeijing  3347 May  6 16:50 CMakeLists.txt
    
60. drwxr-xr-x  9 zhaomeijing zhaomeijing  4096 May  6 16:50 .git/
    
61. -rw-r--r--  1 zhaomeijing zhaomeijing   176 May  6 16:50 .gitignore
    
62. -rw-r--r--  1 zhaomeijing zhaomeijing   162 May  6 16:50 .gitmodules
    
63. drwxr-xr-x  2 zhaomeijing zhaomeijing  4096 May  6 17:20 lib/
    
64. -rw-r--r--  1 zhaomeijing zhaomeijing  1083 May  6 16:50 licence.txt
    
65. -rw-r--r--  1 zhaomeijing zhaomeijing 31682 May  6 16:50 lv_conf.h
    
66. drwxr-xr-x 12 zhaomeijing zhaomeijing  4096 May  6 17:20 lvgl/
    
67. drwxr-xr-x  3 zhaomeijing zhaomeijing  4096 May  6 16:50 main/
    
68. -rw-r--r--  1 zhaomeijing zhaomeijing 10680 May  6 17:20 Makefile
    
69. -rw-r--r--  1 zhaomeijing zhaomeijing  2156 May  6 16:50 README.md
    
70. -rw-r--r--  1 zhaomeijing zhaomeijing  1631 May  6 16:50 simulator.code-workspace
    
71. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ ll bin
    
72. total 8
    
73. drwxr-xr-x 2 zhaomeijing zhaomeijing 4096 May  6 17:20 ./
    
74. drwxr-xr-x 8 zhaomeijing zhaomeijing 4096 May  6 17:20 ../
    
75. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ make
    
76. [  0%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_group.c.o
    
77. [  0%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_obj.c.o
    
78. [  0%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_obj_class.c.o
    
79. [  0%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_obj_draw.c.o
    
80. [  0%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_obj_event.c.o
    
81. [  0%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_obj_id_builtin.c.o
    
82. [  1%] Building C object lvgl/CMakeFiles/lvgl.dir/src/core/lv_obj_pos.c.o
    
83. ......
    
84. [ 99%] Building C object lvgl/CMakeFiles/lvgl_examples.dir/examples/widgets/win/lv_example_win_1.c.o
    
85. [ 99%] Linking C static library ../lib/liblvgl_examples.a
    
86. [ 99%] Built target lvgl_examples
    
87. [ 99%] Building C object CMakeFiles/main.dir/main/src/main.c.o
    
88. [ 99%] Building C object CMakeFiles/main.dir/main/src/mouse_cursor_icon.c.o
    
89. [100%] Linking CXX executable bin/main
    
90. [100%] Built target main
    
91. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ ll
    
92. total 124
    
93. drwxr-xr-x  8 zhaomeijing zhaomeijing  4096 May  6 17:20 ./
    
94. drwxr-xr-x  5 zhaomeijing zhaomeijing  4096 May  6 17:18 ../
    
95. drwxr-xr-x  2 zhaomeijing zhaomeijing  4096 May  6 17:22 bin/
    
96. -rw-r--r--  1 zhaomeijing zhaomeijing 16436 May  6 17:20 CMakeCache.txt
    
97. drwxr-xr-x  7 zhaomeijing zhaomeijing  4096 May  6 17:22 CMakeFiles/
    
98. -rw-r--r--  1 zhaomeijing zhaomeijing  1865 May  6 17:20 cmake_install.cmake
    
99. -rw-r--r--  1 zhaomeijing zhaomeijing  3347 May  6 16:50 CMakeLists.txt
    
100. drwxr-xr-x  9 zhaomeijing zhaomeijing  4096 May  6 16:50 .git/
     
101. -rw-r--r--  1 zhaomeijing zhaomeijing   176 May  6 16:50 .gitignore
     
102. -rw-r--r--  1 zhaomeijing zhaomeijing   162 May  6 16:50 .gitmodules
     
103. drwxr-xr-x  2 zhaomeijing zhaomeijing  4096 May  6 17:22 lib/
     
104. -rw-r--r--  1 zhaomeijing zhaomeijing  1083 May  6 16:50 licence.txt
     
105. -rw-r--r--  1 zhaomeijing zhaomeijing 31682 May  6 16:50 lv_conf.h
     
106. drwxr-xr-x 12 zhaomeijing zhaomeijing  4096 May  6 17:20 lvgl/
     
107. drwxr-xr-x  3 zhaomeijing zhaomeijing  4096 May  6 16:50 main/
     
108. -rw-r--r--  1 zhaomeijing zhaomeijing 10680 May  6 17:20 Makefile
     
109. -rw-r--r--  1 zhaomeijing zhaomeijing  2156 May  6 16:50 README.md
     
110. -rw-r--r--  1 zhaomeijing zhaomeijing  1631 May  6 16:50 simulator.code-workspace
     
111. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ ll bin
     
112. total 1056
     
113. drwxr-xr-x 2 zhaomeijing zhaomeijing    4096 May  6 17:22 ./
     
114. drwxr-xr-x 8 zhaomeijing zhaomeijing    4096 May  6 17:20 ../
     
115. -rwxr-xr-x 1 zhaomeijing zhaomeijing 1071536 May  6 17:22 main*
     
116. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl$ cd bin
     
117. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl/bin$ ./main
     
118. [Warn]  (7.230, +7230)   lv_demo_widgets: LV_FONT_MONTSERRAT_20 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead. lv_demo_widgets.c:139
     
119. [Warn]  (334.156, +326926)       indev_pointer_proc: X is 992 which is greater than hor. res lv_indev.c:651
     
120. [Warn]  (334.414, +258)  indev_pointer_proc: X is 992 which is greater than hor. res lv_indev.c:651
     
121. [Warn]  (336.981, +2567)         indev_pointer_proc: X is 737 which is greater than hor. res lv_indev.c:651
     
122. [Warn]  (337.595, +614)  indev_pointer_proc: X is 737 which is greater than hor. res lv_indev.c:651
     
123. zhaomeijing@raspberrypi5:~/workspace/21_lvgl/lv_sim_vscode_sdl/bin$

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//------LVGL仿真结果

//------界面效果

总结，以上这些内容就是LVGL的简单介绍以及仿真测试，这里只是起到一个抛**引玉的效果，对于LVGL整个应用来讲这些只是九牛一毛，还需要更深入的学习才能掌握LVGL的应用，有兴趣的小伙伴可以动手尝试一下。

//------end