Build root filesystem Preparation System configuration requirement for compiling Buildroot 64 bit CPU 8GB physical+swap memory 30GB free disk space for building, the source tree requires about an another 10GB We recommend you developing the system based on Ubuntu 64ibt, such as Ubuntu 14.04 64ibt, Ubuntu 16.04 64ibt and etc., since other system versions may have problems. Initialization for the compiling environment You need a 64 bit Ubuntu. Please note that the older Ubuntu versions may not be compatible with the package. Ubuntu 14.04 software package installation: $ sudo apt-get install git gnupg flex bison gperf build-essential \ zip tar curl libc6-dev libncurses5-dev:i386 x11proto-core-dev \ libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-glx:i386 \ libgl1-mesa-dev g++-multilib mingw32 cmake tofrodos \ python-markdown libxml2-utils xsltproc zlib1g-dev:i386 lzop $ sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gn u/libGL.so Install the ARM cross compiler toolchain and related software packages for compiling the kernel. $ sudo apt-get install gcc-arm-linux-gnueabihf \ gcc-aarch64-linux-gnu device-tree-compiler lzop libncurses5-dev \ libssl1.0.0 libssl-dev Currently, Buildroot supports Qt5.9.1 by default. Qt5.9.1 requires the host compiler tool GCC and G++ version to be 4.8 and above. Therefore, if the GCC and G++ version in the current compiling environment is lower than 4.8, please update them first before compiling. Download SDK Since the SDK is a larger file, we provide a packed ".git" for downloading: Firefly-PX3-SE_Buildroot_git_180421.7z Once downloaded successfully, please verify the MD5 code first: $ md5sum Firefly-PX3-SE_Buildroot_git_180421.7z 21b8c26d61731ce7bacc9000d39f33ed Firefly-PX3-SE_Buildroot_git_180421.7z If the above verification is ok, please decompress the package: mkdir -p ~/proj/Firefly-PX3-SE cd ~/proj/Firefly-PX3-SE 7zr x Firefly-PX3-SE_Buildroot_git_180421.7z git reset --hard Update remote address to resolve permissions issues when updating the repository git remote set-url gitlab https://gitlab.com/TeeFirefly/px3se-buildroot.git And then you can update it via gitlab directly: git pull gitlab firefly-px3se:firefly-px3se You can also go to https://gitlab.com/TeeFirefly/px3se-buildroot to read the source code online. Building uboot Building uboot: cd ~/proj/Firefly-PX3-SE/u-boot make px3se_linux_defconfig make -j8 Building kernel Building kernel: cd ~/proj/Firefly-PX3-SE/kernel make ARCH=arm px3se_linux_defconfig make ARCH=arm px3se-fireprime.img -j8 Building rootfs and app Building rootfs and app: cd ~/proj/Firefly-PX3-SE . envsetup.sh cd ~/proj/Firefly-PX3-SE/buildroot/ make rockchip_px3se_defconfig && cd .. ./build_all.sh && ./mkfirmware.sh In the above code, "envsetup.sh" is a script for setting the terminal environment variables, which is required to singlely compile some modules via "rk_make.sh". Note: Buildroot is a framework for building embedded Linux system on Linux platform. The whole Buildroot is consisted of "Makefile" scripts and "Kconfig" configuration files. In the "buildroot/dl/" library, you can find the open source software packages downloaded from their official websites. You can just download it only once and don't need to download it again, because for the next time to use the package, the system will pick up it directly from the "dl/" directory. Therefore, due to the national network limitation, it takes a long time to compile the first compiling. To save your time, we provide the basic software packages for you, you can just download and decompress it, and then copy the "dl" directory under "buildroot/". Open source software package: dl.7z Firmware compile script Firefly provides convenient tools for compiling. Building uboot: cd ~/proj/Firefly-PX3-SE ./FFTools/make.sh -u Building kernel: cd ~/proj/Firefly-PX3-SE ./FFTools/make.sh -k -d px3se-fireprime Note: [-d] dts_file_name，use "px3se-fireprime.dts" by default. Building rootfs and app: cd ~/proj/Firefly-PX3-SE ./FFTools/make.sh -a Building all： cd ~/proj/Firefly-PX3-SE ./FFTools/make.sh Burn partition image The "./mkimage.sh" in the last step will repack the "rootfs.img" and copy its image files to "rockimg/". Frequently used image files for general firmware are as below: kernel.img: kernel image recovery.img: recover mode image resource.img: resource image, containing the bootup logo and the Device Tree for kernel rootfs.img: root filesystem in ext4 filesystem format Please refer to the article Update firmware to upgrade the partition iamge files. If you are using Windows, please copy the above image files to the path "rockdev\Image" of "AndroidTool" (the firmware upgrade tool for Windows). And then follow the instruction in the above article to burn the partition image. In this way, you do every thing with default configurations and don't need to modify the file paths. Package the images into unified firmware If you are using the ubuntu to package the images into unified firmware, once compling the SDK successfully, please run ./FFTools/mkupdate/mkupdate.sh in the SDK root directory to generate a unified firmware with the name like Firefly- PX3SE_Buildroot_DEFAULT_xxxxxx.img. In Windows, it's easy to package the images into unified firmware. Follow the last step to copy the file into rockdev\Image of AndroidTool, and then run mkupdate.bat batch filing tool under rockdev to create the unified firmware name "update.img" and save it under rockdev\Image. For firmware release, you can choose "update.img" since it is designed for end-users to upgrade system, while for developpers, we recommend you to use partition image in the developing process.