Linux Build and Flash

This page keeps the content directly related to installing, building, packaging, and flashing the X3568 Linux source tree. Generic VMware and Ubuntu installation screenshots are not included.

Development Environment Notes

• X3568 Linux source compilation is recommended on Ubuntu 16.04 / 18.04 64-bit;
• Linux compilation requires less memory than Android compilation, and a normal development PC is usually sufficient;
• Before building, check the README in the SDK root directory and the output of build.sh -h.

Common Dependencies

sudo apt-get update
sudo apt-get install git-core gnupg flex bison gperf libsdl1.2-dev libwxgtk3.0-dev \
build-essential zip curl zlib1g-dev gcc-multilib g++-multilib genromfs \
libc6-dev-i386 libncurses5-dev x11proto-core-dev libx11-dev ccache \
libgl1-mesa-dev libxml2-utils xsltproc unzip gperf lsb-core lib32z1-dev \
lib32ncurses5-dev texinfo mercurial subversion whois g++ git lzop \
liblz4-tool genext2fs make device-tree-compiler u-boot-tools libssl-dev \
autoconf python-pyelftools python3-pyelftools libusb-1.0 tig repo p7zip \
p7zip-full rar unrar android-tools-fastboot android-tools-adb

Some packages such as hgsubversion may fail to install because of repository changes. Handle them according to the actual prompt. Buildroot compilation also requires expect:

sudo apt install expect

Install Source Package

Copy the Linux source package to the Ubuntu user directory and extract it. The source directory and package name depend on the delivered SDK.

View Build Help

./build.sh -h

Common targets:

Target	Function
lunch	List and switch the current SDK board configuration
uboot	Build U-Boot
kernel	Build Linux kernel
buildroot	Build Buildroot rootfs
all	Build U-Boot, Kernel, rootfs, and recovery
firmware	Package images required for boot
updateimg	Package a unified upgrade image
save	Save debug images, patches, and commands

Full Build

./build.sh lunch

Select:

BoardConfig-rk3568-evb1-ddr4-v10.mk

Then run:

./build.sh all
./build.sh firmware
./build.sh updateimg

You can also run directly:

./build.sh

Build Components Separately

Build U-Boot:

./build.sh uboot

Build Linux kernel:

./build.sh kernel

Build Buildroot filesystem:

./build.sh buildroot

The generated images are placed in the rockdev directory. Common files include boot.img, MiniLoaderAll.bin, misc.img, oem.img, parameter.txt, recovery.img, rootfs.ext4, rootfs.img, update.img, and userdata.img.

Flash Linux Firmware on Windows

1. Extract DriverAssitant_v5.1.1.rar and run DriverInstall.exe;
2. Click “Uninstall Driver” first, then click “Install Driver”;
3. Extract tools\windows\RKDevTool_Release_v2.86.zip and open RKDevTool.exe;
4. Select the “Upgrade Firmware” tab and choose the generated update.img;
5. Hold the RECOVERY key, then connect the Micro USB (OTG) cable and 12V DC power;
6. Click upgrade after the tool detects a LOADER device.

Enter Flash Mode

• Hold the recovery key, press reset, then release recovery to enter loader mode;
• Run reboot bootloader from the serial console to enter loader mode;
• If the Rockchip tool detects an ADB device, click “Switch” to enter loader mode;
• Erasing Flash can enter maskrom mode;
• During serial boot, hold shortcuts: ctrl+c for U-Boot, ctrl+d for loader, ctrl+b for maskrom, and ctrl+f for fastboot.