[arm] add desktop application for buildreoot of rk3568 development board

Hardware preparation

Development board ： The message is rk3568
The root file system ：buildroot
System ：Linux
To add a desktop application, you need to prepare three files ： Desktop icon file 、xxx.desktop file 、 Executable application file

Desktop icon file

It is recommended to use Alibaba vector map website for downloading , The size of the icon is 128x128
Link directly to ：https://www.iconfont.cn/

xx.desktop file

The contents of the document are as follows ：

[Desktop Entry]
Name=Touch
Exec=/usr/bin/Touch
Icon=/usr/share/icon/ico_touch.png
Type=Application

Name Parameter indicates the text display under the desktop icon
Exec Represents the executable application path
Icon Is a desktop application icon file
Type Represents an application （ Whether there are other types of unknown details can go to buildroot The next path QT Analysis under desktop program ）

The following executable program here directly uses the drawing program in the previous chapter to test .

Preparation on the development board

After the three documents have been prepared, the documents will be copied to nfs Folder , Then, copy the three files to the following path

Icon file

cp /mnt/QDesktop/ico_touch.png /usr/share/icon

Applications

cp /mnt/QDesktop/Touch /usr/bin/

The configuration file

cp /mnt/QDesktop/touch.desktop /usr/share/applications/

Then we restart the development board to see that our desktop application has been added , Final effect ：

PS：

If we don't want to use this desktop, we can disable it in the following ways , You can also modify this script to start our own QT desktop ,buildroot This desktop lacks a lot of animation, and it is not perfect , When you have time to do a desktop transplant to this board .