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Low-Level development

Introduces how to download and build uboot, kernel, os etc.

Environment configuration​

Ubuntu 20.04 and above are recommended

code download​


$ repo init -u https://github.com/radxa/manifests.git -b Android12_Radxa_rk14 -m rockchip-s-release.xml
$ repo sync -d -c -j4

build​

There are two ways to compile an image: Full compilation and Fartial compilation. Full compilation takes a longer time, while partial compilation takes a shorter time After the code download is completed, the first compilation should use full compilation. In the subsequent debugging process, it is recommended to use partial compilation, such as compiling the kernel separately if only the kernel has been modified

Full compilation​

Suitable for first compilation

Rock5B

radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5B-userdebug
radxa:rock-android12 $ ./build.sh -UACKup
# get images from IMAGE directory

Rock5BPlus

radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5BGen2-userdebug
radxa:rock-android12 $ ./build.sh -UACKup
# get images from IMAGE directory

Wait for the compilation to complete and you can find the image in the IMAGE directory

Partial compilation​

Suitable for compiling after minor modifications

U-boot

radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5B-userdebug
radxa:rock-android12 $ ./build.sh -AUup

Kernel

radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5B-userdebug
radxa:rock-android12 $ ./build.sh -ACKup

AOSP

radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5B-userdebug
radxa:rock-android12 $ ./build.sh -Aup

Wait for the compilation to complete and you can find the image in the IMAGE directory