03-Android_SDK_Compilation

SDK Introduction

Kernel version: 6.1

Android system version: 14.0

Obtain the SDK Source Code

• Network disk directory

1-SDK Software Source Code
├── Android14
    ├── rk3576-android14.0-*.md5sum
    └── rk3576-android14.0-*.tar.gz

• Here, * generally refers to the date. The same applies below. The actual names shall prevail in the network disk.

• Copy the source code compressed package to the compilation host directory

  If the compilation host is a virtual machine, do not compile in the shared directory.

• MD5 verification of file integrity

md5sum rk3576-android14.0-*.tar.gz

If the result is consistent with the content of rk3576-android14.0-*.md5sum, the file is downloaded completely.

• Unzip the source code compressed package

$ mkdir rk3576-android
$ tar -zxvf rk3576-android14.0-*.tar.gz -C rk3576-android/
$ cd rk3576-android/
$ git reset --hard

Configure the Environment

Prerequisite: Ensure the hardware requirements for compilation and the successful setup of the compilation environment.

Configure the environment before single compilation or full compilation.

$ ./build.sh lunch
will lunch sdk

You're building on Linux
Lunch menu...pick a combo:

1. rk3576
Which would you like? [0]: 1

You're building on Linux
Lunch menu...pick a combo:

1. BoardConfig.mk
2. BoardConfig-rk3576-kickpi-k7.mk
Which would you like? [0]: 2
switching to board: /home/huangcm/A/sdk/rk3576-android14.0/device/rockchip/rk3576/BoardConfig-rk3576-kickpi-k7.mk

Full Compilation

Standard image

./build.sh -AUCKu

Image: rockdev/Image-rk3576_u/update-rk3576-kickpi-k7-android-*.img

Multi-screen recognition image

$ ./build.sh -UCKAum

Single Compilation

Single compile Uboot

./build.sh -Uu

Single compile Android

./build.sh -Au

Single compile kernel

./build.sh -CKu

Configure Kernel defconfig

./build.sh -M

Other Instructions

Firmware Instructions

The following files will be generated after a full compilation:

(Source code)/rockdev/Image-rk3576_u/
rockdev/Image-rk3576_u/
├── baseparameter.img
├── boot-debug.img
├── boot.img
├── config.cfg
├── dtbo.img
├── MiniLoaderAll.bin
├── misc.img
├── parameter.txt
├── pcba_small_misc.img
├── pcba_whole_misc.img
├── recovery.img
├── resource.img
├── super.img
├── uboot.img
├── update.img
├── update-rk3576-kickpi-k7-android-*.img
└── vbmeta.img

The image to be flashed is (Source code)/rockdev/Image-rk3576_u/update-rk3576-kickpi-k7-android-*.img

For details on flashing, refer to - 10-System Image Flashing

Multi-screen Recognition Compilation

$ ./build.sh -UCKAum

userdebug and user Compilation

The default compilation mode is userdebug. If you need a user version image, you need to modify the corresponding compilation mk.

vim device/rockchip/rk3576/BoardConfig-rk3576-kickpi-k7.mk
-export BUILD_VARIANT=userdebug
+export BUILD_VARIANT=user

Android Environment Configuration

Configure the environment to use commands such as mm / get_build_var in the Android environment.

// Configure the environment
source build/envsetup.sh
lunch rk3576_u-userdebug

// For example
$ get_build_var PRODUCT_HAVE_RKPHONE_FEATURES
true

dts path

kernel-6.1/arch/arm64/boot/dts/rockchip/rk3576-kickpi-k7-android.dts

defconfig path

kernel-6.1/arch/arm64/configs/rockchip_defconfig

FAQ

Android compilation error due to path errors caused by code location changes

image-20241125155203743

You need to clear the data.

source build/envsetup.sh
lunch rk3576_u-userdebug
make clean -j32

Perform a full compilation again.

Insufficient compilation space

Currently, the default thread is -j32. Compile by reducing the number of threads.

Method 1:

Modify the compilation method and specify the thread with -J.

For example, change the thread to 16, -J16
./build.sh -AUCKu -J16

Method 2:

Modify the default thread.

$ vim device/rockchip/common/build/rockchip/build.sh
-BUILD_JOBS=32
+BUILD_JOBS=16