VIM3/3L Download Android Source

The Android Source Tree of our Khadas VIM3 are hosted on https://github.com/khadas. There are many different repositories. Walk through the steps below to download the Source Code. refer this link for khadas docs https://docs.khadas.com/

Steps Firstly, install git-lfs tool for downloading Android SDK.

$ mkdir git_lfs $ cd git_lfs $ wget https://github.com/git-lfs/git-lfs/releases/download/v2.3.4/git-lfs-linux-amd64-2.3.4.tar.gz $ tar xvzf git-lfs-linux-amd64-2.3.4.tar.gz $ cd git-lfs-2.3.4 $ sudo ./install.sh $ git lfs install

Create an empty directory to hold your working files: $ mkdir -p WORKING_DIRECTORY $ cd WORKING_DIRECTORY

Run repo init to download the manifest repository first:

android 9.0 64 bit:

$ repo init -u https://github.com/khadas/android_manifest.git -b khadas-vim3-p-64bit

android 9.0 32 bit:

$ repo init -u https://github.com/khadas/android_manifest.git -b khadas-vims-pie

Run repo sync to pull down the Android Source Tree:

$ repo sync

NOTE: Don't perform repo commands as root user.

VIM3/3L Install Toolchains

The Amlogic Platform requires extra toolchains for cross-compiling, you will need to follow these steps to setup.

Toolchains for U-Boot

Install Cross Compiler for U-Boot BL:

$ sudo apt-get install gcc-arm-none-eabi $ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.bz2 $ wget https://developer.arm.com/-/media/Files/downloads/gnu-rm/6-2017q2/gcc-arm-none-eabi-6-2017-q2-update-linux.tar.bz2 $ sudo mkdir /opt/toolchains $ sudo tar -xjf gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.bz2 -C /opt/toolchains $ sudo tar -xjf gcc-arm-none-eabi-6-2017-q2-update-linux.tar.bz2 -C /opt/toolchains

Toolchains for Linux Kernel

$ wget https://releases.linaro.org/components/toolchain/binaries/6.3-2017.02/arm-linux-gnueabihf/gcc-linaro-6.3.1-2017.02-x86_64_arm-linux-gnueabihf.tar.xz $ wget https://releases.linaro.org/components/toolchain/binaries/6.3-2017.02/aarch64-linux-gnu/gcc-linaro-6.3.1-2017.02-x86_64_aarch64-linux-gnu.tar.xz $ sudo mkdir /opt/toolchains $ sudo tar xvJf gcc-linaro-6.3.1-2017.02-x86_64_arm-linux-gnueabihf.tar.xz -C /opt/toolchains $ sudo tar xvJf gcc-linaro-6.3.1-2017.02-x86_64_aarch64-linux-gnu.tar.xz -C /opt/toolchains

Building

Before you start to build, make sure you have done all the Preparations listed above.

Build U-Boot

$ cd PATH_YOUR_PROJECT $ cd bootloader/uboot $ ./mk TARGET

Build Android

$ cd PATH_YOUR_PROJECT $ source build/envsetup.sh $ lunch TARGET_LUNCH $ make -jN otapackage

NOTE:

• We have seen errors when performing build using python 3.6 and higher version, so for smooth build use python 2.7.
• If you are getting this error /home/user/aosp9/common/scripts/gcc-version.sh: line 26: aarch64-linux-gnu-gcc: command not found, Make sure you have the necessary cross-compilation tools installed on your system, Common environment variables that may need to be configured include PATH and CROSS_COMPILE.

PATH: This variable should include the path to the cross-compilation tools. Run the following command to append the necessary path to the PATH variable:

export PATH=/path/to/cross-compilation-tools:$PATH

Replace /path/to/cross-compilation-tools with the actual path where the cross-compilation tools are installed.

CROSS_COMPILE: This variable is used to specify the prefix for cross-compilation tools. It should typically be set to the toolchain's prefix followed by a hyphen (-). Run the following command to set the CROSS_COMPILE variable:

export CROSS_COMPILE=aarch64-linux-gnu-

Use below commands to change python version.

cd /usr/bin ls -l python* sudo mv python python_old3 sudo ln -s python3.8 python

Gernerate images at: out/target/product/TARGET/update.img.

• Replace N as the number you want when you run make -jN.
• Replace TARGET_LUNCH to your lunch select.
• For VIM3, it’s kvim3-userdebug.
• TARGET should be kvim3