Getting Started Guide

Edge Platforms · Intel® Core™ Processor (14th Gen), Intel® Processor N150, Intel® Processor N250, and Intel® Core™ 3 Processor N355

This guide provides instructions for building and installing the Android* 16 Base BSP Reference Release for Intel® Core™ Processor (14th Gen) (code named Raptor Lake-S Refresh); and Intel® Processor N150, Intel® Processor N250, and Intel® Core™ 3 Processor N355 (code named Twin Lake).

Prerequisites

Build Host

• 64-bit workstation running Ubuntu* 22.04 (Jammy Jellyfish)
• Python 3.6 or later
• At least 400 GB free disk space
• High-speed Internet access

Target Hardware

• Intel® Core™ Processor (14th Gen) (code named Raptor Lake-S Refresh)
• Intel® Processor N150, Intel® Processor N250, and Intel® Core™ 3 Processor N355 (code named Twin Lake)
• Minimum 400 GB storage
• Flashed with the latest IFWI corresponding to the target platform (see table below)
• High-speed network connectivity

Set Up the Build Environment

The Android source code is distributed across multiple Git* repositories. The repo tool simplifies managing and synchronizing those repositories. If Git is not yet configured on your build machine, see Git Setup for Build Environment.

Install the repo tool:

mkdir -p ~/bin
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo
export PATH=~/bin:$PATH

Install required packages on Ubuntu 22.04 LTS:

sudo apt-get update
sudo apt-get install -y wget openjdk-8-jdk git ccache automake \
   lzop bison gperf build-essential zip curl \
   zlib1g-dev g++-multilib python3-networkx \
   libxml2-utils bzip2 libbz2-dev libbz2-1.0 \
   libghc-bzlib-dev squashfs-tools pngcrush \
   schedtool dpkg-dev liblz4-tool make optipng maven \
   libssl-dev bc bsdmainutils gettext python3-mako \
   libelf-dev sbsigntool dosfstools mtools efitools \
   python3-pystache git-lfs python-is-python3 flex clang libncurses5 \
   fakeroot ncurses-dev xz-utils cryptsetup-bin \
   apt-transport-https ca-certificates curl lsb-release \
   rsync vim python-six kmod glslang-tools \
   software-properties-common cpio python3-pip ninja-build \
   cutils cmake pkg-config xorriso mtools libjson-c-dev file

sudo pip3 install meson==1.8.3 mako==1.1.0 dataclasses pycryptodome ply==3.11

Install the Intel® oneAPI dependencies required by the build environment:

wget -O- https://apt.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS.PUB \
   | gpg --dearmor | sudo tee /usr/share/keyrings/oneapi-archive-keyring.gpg > /dev/null && \
   echo "deb [signed-by=/usr/share/keyrings/oneapi-archive-keyring.gpg] https://apt.repos.intel.com/oneapi all main" \
   | sudo tee /etc/apt/sources.list.d/oneAPI.list

sudo apt-get update

sudo apt install -y \
  intel-oneapi-ipp-devel-2021.10 \
  intel-oneapi-mkl-devel-2021.1.1 \
  intel-oneapi-ipp-devel-32bit-2021.10 \
  intel-oneapi-mkl-devel-32bit-2021.1.1

unset no_proxy
unset NO_PROXY
export no_proxy=localhost
export NO_PROXY=localhost

After updating the no_proxy settings, run apt commands with the -E option:

sudo -E apt update
sudo -E apt install <packages>

Download and Build the Source Code

Manifest for this release: BM_BSP_2026_Q3_V2_A16.xml (GitHub). The release manifests are available in the stable-build/A16 directory.

Download the manifest, and then move it to your home directory:

mv BM_BSP_2026_Q3_V2_A16.xml ~/.

Create a working directory and download the source code:

mkdir ~/rpl-android-bm
cd ~/rpl-android-bm

repo init -u https://github.com/edge-aosp-bsp/manifest.git
mkdir .repo/manifests
cp ~/BM_BSP_2026_Q3_V2_A16.xml .repo/manifests/.
repo init -u https://github.com/edge-aosp-bsp/manifest.git -m BM_BSP_2026_Q3_V2_A16.xml

repo sync -c --force-sync -j16
repo forall -c git lfs pull

Build the Android Image

Supported build targets are caas-userdebug and caas-user. The examples below use caas-userdebug, which is intended for development and debugging, including root access and debug tools. Use caas-user for a release-oriented configuration with reduced debugging capability.

Default Build

# Export the Trusty flag before lunch
export ENABLE_TRUSTY=false

source build/envsetup.sh
lunch caas-userdebug
make flashfiles BASE_LINUX_INTEL_LTS2024_KERNEL=true ENABLE_AVF=false -j16

Trusty Build

Supported only on Intel® Core™ Processor (14th Gen).

Step 1: Copy the Trusty binary:

cp lk.bin ~/rpl-android-bm/vendor/intel/fw/trusty-release-binaries/

Step 2: Build with Trusty enabled:

# Export the Trusty flag before lunch
export ENABLE_TRUSTY=true

source build/envsetup.sh
lunch caas-userdebug
make flashfiles BASE_LINUX_INTEL_LTS2024_KERNEL=true -j16

Build Output

The generated build output files are available in ~/rpl-android-bm/out/target/product/caas/:

find out -name *.tar.gz
# out/target/product/caas/caas-releasefile-userdebug.iso.tar.gz
# out/target/product/caas/caas-releasefiles-userdebug.tar.gz

Flash and Boot Up the System

Step 1: Flash the Image to a USB Drive

On Windows*, use Rufus to write caas-flashfile-<variant>.iso.zip to a USB drive. On Ubuntu*, use dd:

unzip caas-flashfile-userdebug.iso.zip
dd if=./caas-flashfile-userdebug.iso of=/dev/sdc bs=1024M

Step 2: Boot the System to Android

1. Insert the USB drive into the board.
2. Press F2 while booting.
3. Navigate: Boot Maintenance → Boot Option Menu → Change Boot Order.
4. Set the USB drive as the first boot option, save (Fn + F4), and continue.
5. Proceed with installation, and wait for flashing to complete.
6. Remove the USB drive, and then reboot. Android will start automatically.

BIOS Settings

Verify that the BIOS settings match the values in the following table. These values are the default settings for the supported IFWI versions. Press the appropriate BIOS setup key (for example, F2, Del, or F12) during startup to access the BIOS Setup menu.

Git Setup for Build Environment

Git must be set up on your build machine to run repo init. Configure Git with your name and email address, and add proxy settings if you are behind a firewall:

cd /home/$USER
vi /home/$USER/.gitconfig

Append the following lines to the .gitconfig file:

[user]
    email = <your email>
    name = <your name>
[http]
    proxy = <http_proxy>
[https]
    proxy = <https_proxy>

If required, create a symbolic link for Python 3 in the /usr/bin directory:

sudo ln -sf /usr/bin/python3 /usr/bin/python

References