This guide covers Ubuntu version 24.04 LTS and later.

1. Build script(build-zephyr.sh)

   #!/usr/bin/env bash
   set -e
   
   echo "=== Updating and upgrading system packages ==="
   sudo apt update
   sudo apt -y upgrade
   
   echo "=== Installing dependencies ==="
   sudo apt -y install --no-install-recommends \
       git \
       cmake \
       ninja-build \
       gperf \
       ccache \
       dfu-util \
       device-tree-compiler \
       wget \
       python3-dev \
       python3-venv \
       python3-tk \
       xz-utils \
       file \
       make \
       gcc \
       gcc-multilib \
       g++-multilib \
       libsdl2-dev \
       libmagic1
   
   echo "=== Setting up Zephyr workspace ==="
   mkdir -p ~/work/zephyr
   cd ~/work/zephyr
   
   echo "=== Creating Python virtual environment ==="
   python3 -m venv .venv
   
   echo "=== Activating Python virtual environment ==="
   source .venv/bin/activate
   
   echo "=== Installing west tool ==="
   pip install --upgrade pip
   pip install west
   
   echo "=== Fetching Zephyr source (v4.4.0) ==="
   mkdir -p zephyrproject
   git clone --depth=1 --branch v4.4.0 https://github.com/zephyrproject-rtos/zephyr zephyrproject/zephyr
   west init -l zephyrproject/zephyr
   
   cd zephyrproject
   # Fetch only the modules required for this board (cmsis*, Cortex-R headers)
   west config manifest.project-filter -- -.*,+cmsis.*
   west update --narrow -o=--depth=1
   west zephyr-export
   west packages pip --install
   
   echo "=== Installing Python dependencies ==="
   pip install -r zephyr/scripts/requirements.txt
   
   echo "=== Installing Zephyr SDK ==="
   west sdk install -t arm-zephyr-eabi
   
   echo "=== Building sample application ==="
   cd zephyr
   
   west build -b sparrowhawk_rcar_v4h/r8a779g0/r52 samples/hello_world -p always
   
   echo "=== Setup and build completed successfully ==="
   

2. Execute the following command

   chmod +x build-zephyr.sh
   ./build-zephyr.sh
   

   • The zephyr.bin will be generated under ~/work/zephyr/zephyrproject/zephyr/build/zephyr/zephyr.bin.

This guide covers Windows 11.

1. Build script(build-zephyr.ps1)

   echo "=== Install dependencies ==="
   winget install --scope user Kitware.CMake
   winget install `
     Ninja-build.Ninja `
     oss-winget.gperf `
     Python.Python.3.12 `
     Git.Git `
     oss-winget.dtc `
     wget `
     7zip.7zip
   
   echo "=== Reload PATH to use the installed tools ==="
   $env:Path = [Environment]::GetEnvironmentVariable("Path", "Machine") + ";" + [Environment]::GetEnvironmentVariable("Path", "User")
   $env:Path += ";C:\Program Files\7-Zip"
   
   echo "=== Create a new virtual environment ==="
   mkdir -Force "$HOME\work\zephyr"
   cd "$HOME\work\zephyr"
   py -3.12 -m venv zephyrproject\.venv
   zephyrproject\.venv\Scripts\Activate.ps1
   pip install west
   
   echo "=== Get Zephyr and install Python dependencies ==="
   git clone --depth=1 --branch v4.4.0 https://github.com/zephyrproject-rtos/zephyr zephyrproject\zephyr
   west init -l zephyrproject\zephyr
   cd zephyrproject
   # Fetch only the modules required for this board (cmsis*, Cortex-R headers)
   west config manifest.project-filter -- '-.*,+cmsis.*'
   west update --narrow -o=--depth=1
   west zephyr-export
   
   echo "=== Install required Python packages ==="
   python -m pip install @((west packages pip) -split ' ')
   cd zephyr
   west sdk install -t arm-zephyr-eabi
   
   echo "=== Building sample application ==="
   west build -b sparrowhawk_rcar_v4h/r8a779g0/r52 samples/hello_world -p always
   
   echo "=== Setup and build completed successfully ==="
   

   • If prompted by Windows during the installation, enter administrator credentials if required, then click “Yes” to continue.
2. Execute the following command

   Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
   .\build-zephyr.ps1
   

   • The zephyr.bin will be generated under $HOME\work\zephyr\zephyrproject\zephyr\build\zephyr\zephyr.bin

Copy zephyr.bin to the microSD card, which already has the Yocto/Debian (rootfs) written, and insert it into the Sparrow Hawk board.

sudo mount /dev/sdxX /mnt
sudo cp ~/work/zephyr/zephyrproject/zephyr/build/zephyr/zephyr.bin /mnt/
sudo umount /mnt

ext4load mmc 0 0x40040000 /zephyr.bin

Copy zephyr.bin to a new microSD card, which has no Yocto/Debian (rootfs) written, and insert it into the Sparrow Hawk board.

sudo fdisk -l
sudo fdisk /dev/sdx
sudo mkfs.ext4 /dev/sdxX
sudo mount /dev/sdxX /mnt
sudo cp ~/work/zephyr/zephyrproject/zephyr/build/zephyr/zephyr.bin /mnt/
sudo umount /mnt

ext4load mmc 0 0x40040000 /zephyr.bin

This guide covers Tera Term version 5.0.

Transfer zephyr.bin from a host PC over the serial console using Tera Term and XMODEM.

loadx 0x40040000

File → Transfer → XMODEM → Send
Select zephyr.bin, enable the "1K" option, and start the transfer.