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Low Level Development

Introduces how to build and pack uboot, kernel, aosp and so on.

Environment configuration​

For Ubuntu >= 15.04 ,use Open JDK

sudo apt-get update
sudo apt-get install openjdk-8-jdk

Download Radxa Android SDK​

Radxa Android SDK contains hundreds of Git repositories, and it would be very tedious to download them one by one without repo.

Repo​

Repo is a tool used in Android development to manage multiple Git repositories. It is a Python script that facilitates developers to version control and manage multiple Git libraries.

Download Repo​

$ echo "export REPO_URL='https://storage.googleapis.com/git-repo-downloads/repo'" >> ~/.bashrc
$ source ~/.bashrc
$ curl https://storage.googleapis.com/git-repo-downloads/repo -o /tmp/repo
$ sudo cp /tmp/repo /usr/local/bin/repo
$ sudo chmod +x /usr/local/bin/repo

Code download​

$ repo init -u https://github.com/radxa/manifests.git -b Android12_Radxa_rk14 -m rockchip-s-release.xml
$ repo sync -d --no-tags -j4

Mirror compilation​

Mirror compilation can be done using two methods

Compile using the SDK compilation script method

radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5C-userdebug
radxa:rock-android12 $ . /build.sh -UACKu
# get images from rockdev directory

Wait for the build to complete and you will find the images in the rockdev directory.

Method two​

You can compile the image step by step according to this method

  1. Set up the environment for compiling the project
radxa:rock-android12 $ source build/envsetup.sh
radxa:rock-android12 $ lunch RadxaRock5C-userdebug
  1. Compile U-boot
radxa:rock-android12 $ . /build.sh -U
  1. Compile the kernel
radxa:rock-android12 $ . /build.sh -CK
  1. Compile AOSP
radxa:rock-android12 $ . /build.sh -A
  1. Make Images
radxa:rock-android12 $ . /build.sh -u