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The SP7350 supports six 13 root file systems:

  • BusyBox 1.3137.10

  • Ubuntu Server 20.04.6 / 22.04.4 / 24.04.1

  • Ubuntu MATE 20.04.6 / 22.04.4 / 24.04.1

  • Ubuntu XFCE 20.04.6 / 22.04.4 / 24.04.1

  • Buildroot 2024.02

  • Yocto 4.2.4

  • Yocto 3.0.2 (32-bit)

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Please type the corresponding number to select one of the listed root file systems. For example, enter “5” “7” to select “Ubuntu MATE 2224.04.04”1”.

After completing the build process, the compiled root filesystem is located at:

Code Block
linux/rootfs/initramfs/disk/

The image of the target root filesystem is then made and stored at:

Code Block
out/rootfs.img

2. BusyBox 1.

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37.

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0

BusyBox constructs a lightweight root file system for embedded Linux systems by combining tiny versions of many common UNIX utilities into a single small executable, often just a few hundred kilobytes. This reduces the overall memory footprint and system overhead compared to having separate executables for each utility, contributing to faster boot times.

The source of BusyBox 1.3137.1 0 is be downloaded from:

busybox-1.3137.10.tar.bz2

Users can use menuconfig of BusyBox to select additional utilities. Navigate to the BusyBox directory (:

Code Block
linux/rootfs/initramfs/busybox-1.

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37.0

And run ‘make menuconfig’, for example:

Code Block
wellslu@scdiu3:~/Q654/linux/rootfs/initramfs/busybox-1.37.0$ make menuconfig

A BusyBox Configuration menu will appear:

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Users can move the cursor to enable the desired utilities. For example, to enable TFTP FTP server support, navigate to 'Networking Utilities' and enable 'tftpd ftpd (10 30 kb)'.

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Exit BusyBox Configuration menu and choose ‘Save’ to save the changes to default configuration file ‘.config’. Run 'make' to rebuild the images. The 'tftpdftpd' utility will be included in the new root file system:

Code Block
wellslu@scdiu3:~/q654/test$Q654$ ll linux/rootfs/initramfs/disk/usr/sbin/tftpftp*
lrwxrwxrwx 1 wellslu sp 17 JunOct  47 1810:5707 linux/rootfs/initramfs/disk/usr/sbin/tftpdftpd -> ../../bin/busybox*
wellslu@scdiu3:~/q654/test$Q654$

To update your settings as the default configuration, copy the file 'linux/rootfs/initramfs/busybox-1.3137.10/.config' to 'linux/rootfs/initramfs/configs/bbx_dynamic_defconfig':

Code Block
wellslu@scdiu3:~/q654/testQ654/linux/rootfs/initramfs/busybox-1.3137.1$0$ cp .config ../configs/bbx_dynamic_defconfig 
wellslu@scdiu3:~/q654/testQ654/linux/rootfs/initramfs/busybox-1.3137.1$0$

Default The default account of virtual terminal is : rootRefer to 'root,' and no password is required.

Refer to the snapshot of the UART console when Linux has just started successfully:

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The snapshot of the virtual terminal (tty1) on LCD MIPI/DSI or HDMI display:

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3. Ubuntu Server 20.04.6 / 22.04.4 / 24.04.1

Ubuntu Server is a popular open-source operating system designed to run on servers. Developed and maintained by Canonical Ltd., it provides a robust, secure, and versatile platform for various server tasks, from web hosting to cloud computing.

The base root file system of Ubuntu 20.04.6 is downloaded from:

ubuntu-base-20.04.6-base-arm64.tar.gz

The base root file system of Ubuntu 22.04.4 is downloaded from:

ubuntu-base-22.04.4-base-arm64.tar.gz

The base root file system of Ubuntu 24.04.1 is downloaded from:

ubuntu-base-24.04.1-base-arm64.tar.gz

The following packages or utilities are added to the base root file system:

  • ubuntu-standard

  • ubuntu-minimal

  • ubuntu-server

  • curl

  • iputils-ping

  • net-tools

  • network-manager

  • openssh-server

The pre-built root file-system has limited utilities or packages. Users can extend the functionality by installing extra utilities or packages from Ubuntu APT servers on the internet. For example, to install iperf3, users can issue the following commands:

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The snapshot of the virtual terminal (tty1) on LCD display:

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4. Ubuntu MATE 20.04.6 / 22.04.4 / 24.04.1

Ubuntu MATE is a user-friendly, open-source operating system that combines the robust foundation of Ubuntu with the MATE desktop environment. This combination offers a traditional, highly customizable desktop experience suitable for users of all levels, from beginners to experienced Linux enthusiasts.

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The base root file system of Ubuntu 20.04.6 is downloaded from:

ubuntu-base-20.04.6-base-arm64.tar.gz

The base root file system of Ubuntu 22.04.4 is downloaded from:

ubuntu-base-22.04.4-base-arm64.tar.gz

The base root file system of Ubuntu 24.04.1 is downloaded from:

ubuntu-base-24.04.1-base-arm64.tar.gz

The following packages are added to the base root file system:

  • ubuntu-standard

  • ubuntu-minimal

  • ubuntu-mate-desktop

  • curl

  • iputils-ping

  • net-tools

  • openssh-server

  • oem-config-gtk

The pre-built root file-system has limited utilities or packages. Users can extend the functionality by installing extra utilities or packages from Ubuntu APT servers on the internet.

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The snapshot of the MATE 20.04 Desktop on LCD display:

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5. Ubuntu XFCE 20.04.6 / 22.04.4 / 24.04.1

Ubuntu XFCE, also known as Xubuntu, is an official flavor of Ubuntu that features the lightweight XFCE desktop environment. It is designed to provide a fast, stable, and visually appealing user experience, making it an excellent choice for users seeking efficiency and performance, especially on less powerful hardware. It consumes less system resources than MATE desktop environment.

The base root file system of Ubuntu 20.04.6 is downloaded from:

ubuntu-base-20.04.6-base-arm64.tar.gz

The base root file system of Ubuntu 22.04.4 is downloaded from:

ubuntu-base-22.04.4-base-arm64.tar.gz

The following packages are added to the base root file system of Ubuntu 24.04.1 is downloaded from:

ubuntu-base-24.04.1-base-arm64.tar.gz

The following packages are added to the base root file system:

  • ubuntu-standard

  • ubuntu-minimal

  • xubuntu-desktop

  • curl

  • iputils-ping

  • net-tools

  • openssh-server

  • oem-config-gtk

The following packages are removed:

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Code Block
wellslu@scdiu3:~/q654/test$Q654$ ll linux/rootfs/initramfs/disk/lib64/libdrm*
lrwxrwxrwx 1 wellslu sp    11 Jun  3 17:34 linux/rootfs/initramfs/disk/lib64/libdrm.so -> libdrm.so.2*
lrwxrwxrwx 1 wellslu sp    15 Jun  3 17:34 linux/rootfs/initramfs/disk/lib64/libdrm.so.2 -> libdrm.so.2.4.0*
-rwxr-xr-x 1 wellslu sp 91952 Jun  3 17:34 linux/rootfs/initramfs/disk/lib64/libdrm.so.2.4.0*
wellslu@scdiu3:~/q654/test$Q654$ 
wellslu@scdiu3:~/q654/test$Q654$ ll linux/rootfs/initramfs/disk/usr/bin/modetest
-rwxr-xr-x 1 wellslu sp 83864 Jun  3 17:34 linux/rootfs/initramfs/disk/usr/bin/modetest*
wellslu@scdiu3:~/q654/testQ654

To save the modifications to the defconfig file, go to the Buildroot directory and run 'make savedefconfig':

Code Block
wellslu@scdiu3:~/q654/test$Q654$ cd linux/rootfs/initramfs/buildroot/
wellslu@scdiu3:~/q654/testQ654/linux/rootfs/initramfs/buildroot$
wellslu@scdiu3:~/q654Q654/test/linux/rootfs/initramfs/buildroot$ make savedefconfig

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Code Block
wellslu@scdiu3:~/q654Q654/test/linux/rootfs/initramfs/buildroot$ git diff
diff --git a/initramfs/buildroot/configs/sp7350_defconfig b/initramfs/buildroot/configs/sp7350_defconfig
index 428643a0..b13475db 100644
--- a/initramfs/buildroot/configs/sp7350_defconfig
+++ b/initramfs/buildroot/configs/sp7350_defconfig
@@ -6,6 +6,8 @@ BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
 BR2_INIT_SYSTEMD=y
 BR2_SYSTEM_BIN_SH_BASH=y
+BR2_PACKAGE_LIBDRM=y
+BR2_PACKAGE_LIBDRM_INSTALL_TESTS=y
 BR2_PACKAGE_BC=y
 BR2_PACKAGE_DHCP=y
 BR2_PACKAGE_DHCP_RELAY=y
wellslu@scdiu3:~/q654/testQ654/linux/rootfs/initramfs/buildroot$

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are added to defconfig file: initramfs/buildroot/configs/sp7350_defconfigDefault account is: root

The initial size of the root file-system is approximately 815 MB.

Refer to the snapshot of the UART console when Linux has just started successfully:

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-system is approximately 815 MB.

The default account is root, and the system will log in automatically upon successful boot. For reference, see the snapshot of the UART console right after Linux has started successfully.

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The default username is root, and no password is required to access the virtual terminal (available via MIPI/DSI or HDMI display). For reference, see the snapshot of the virtual terminal on the HDMI LCD panel after Linux has booted successfully.

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6. Yocto 4.2.4

Yocto is an open-source project that provides a set of tools and frameworks to create custom Linux-based systems, specifically for embedded devices. It is a collection of tools, metadata, and workflows that allow developers to generate tailored Linux distributions.

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Code Block
IMAGE_INSTALL:append = " xxx"

Where xxx represents the name of the package you wish to install. Notice the space before xxx; it ensures it is added correctly to the list.

The UART console will automatically log in upon boot. For reference, see the snapshot of the UART console when Linux starts successfully.

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