Getting Started Guide

Follow this guide to:

• Set up a command-line Zephyr development environment on Ubuntu, macOS, or Windows (instructions for other Linux distributions are discussed in Install Linux Host Dependencies)

• Get the source code

• Build, flash, and run a sample application

Select and Update OS

Click the operating system you are using.

UbuntumacOSWindows

This guide covers Ubuntu version 18.04 LTS and later.

sudo apt update
sudo apt upgrade

Install dependencies

Next, you’ll install some host dependencies using your package manager.

The current minimum required version for the main dependencies are:

Tool	Min. Version
CMake	3.20.0
Python	3.6
Devicetree compiler	1.4.6

UbuntumacOSWindows

1. Download, inspect and execute the Kitware archive script to add the Kitware APT repository to your sources list. A detailed explanation of kitware-archive.sh can be found here kitware third-party apt repository:

   wget https://apt.kitware.com/kitware-archive.sh
   sudo bash kitware-archive.sh
   

2. Use apt to install the required dependencies:

   sudo apt install --no-install-recommends git cmake ninja-build gperf \
     ccache dfu-util device-tree-compiler wget \
     python3-dev python3-pip python3-setuptools python3-tk python3-wheel xz-utils file \
     make gcc gcc-multilib g++-multilib libsdl2-dev libmagic1
   

3. Verify the versions of the main dependencies installed on your system by entering:

   cmake --version
   python3 --version
   dtc --version
   

   Check those against the versions in the table in the beginning of this section. Refer to the Install Linux Host Dependencies page for additional information on updating the dependencies manually.

Get Zephyr and install Python dependencies

Next, clone Zephyr and its modules into a new west workspace named zephyrproject. You’ll also install Zephyr’s additional Python dependencies.

Python is used by the west meta-tool as well as by many scripts invoked by the build system. It is easy to run into package incompatibilities when installing dependencies at a system or user level. This situation can happen, for example, if working on multiple Zephyr versions at the same time. For this reason it is suggested to use Python virtual environments.

UbuntumacOSWindows

Install globallyInstall within virtual environment

1. Install west, and make sure ~/.local/bin is on your PATH environment variable:

   pip3 install --user -U west
   echo 'export PATH=~/.local/bin:"$PATH"' >> ~/.bashrc
   source ~/.bashrc
   

2. Get the Zephyr source code:

   west init ~/zephyrproject
   cd ~/zephyrproject
   west update
   

3. Export a Zephyr CMake package. This allows CMake to automatically load boilerplate code required for building Zephyr applications.

   west zephyr-export
   

4. Zephyr’s scripts/requirements.txt file declares additional Python dependencies. Install them with pip3.

   pip3 install --user -r ~/zephyrproject/zephyr/scripts/requirements.txt
   

Install Zephyr SDK

The Zephyr Software Development Kit (SDK) contains toolchains for each of Zephyr’s supported architectures, which include a compiler, assembler, linker and other programs required to build Zephyr applications.

It also contains additional host tools, such as custom QEMU and OpenOCD builds that are used to emulate, flash and debug Zephyr applications.

UbuntumacOSWindows

1. Download and verify the latest Zephyr SDK bundle:

   cd ~
   wget https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.14.2/zephyr-sdk-0.14.2_linux-x86_64.tar.gz
   wget -O - https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.14.2/sha256.sum | shasum --check --ignore-missing
   

   If your host architecture is 64-bit ARM (for example, Raspberry Pi), replace x86_64 with aarch64 in order to download the 64-bit ARM Linux SDK.

2. Extract the Zephyr SDK bundle archive:

   tar xvf zephyr-sdk-0.14.2_linux-x86_64.tar.gz
   

   Note

   It is recommended to extract the Zephyr SDK bundle at one of the following locations:

   • $HOME

   • $HOME/.local

   • $HOME/.local/opt

   • $HOME/bin

   • /opt

   • /usr/local

   The Zephyr SDK bundle archive contains the zephyr-sdk-0.14.2 directory and, when extracted under $HOME, the resulting installation path will be $HOME/zephyr-sdk-0.14.2.

3. Run the Zephyr SDK bundle setup script:

   cd zephyr-sdk-0.14.2
   ./setup.sh
   

   Note

   You only need to run the setup script once after extracting the Zephyr SDK bundle.

   You must rerun the setup script if you relocate the Zephyr SDK bundle directory after the initial setup.

4. Install udev rules, which allow you to flash most Zephyr boards as a regular user:

   sudo cp ~/zephyr-sdk-0.14.2/sysroots/x86_64-pokysdk-linux/usr/share/openocd/contrib/60-openocd.rules /etc/udev/rules.d
   sudo udevadm control --reload
   

Build the Blinky Sample

Note

Blinky is compatible with most, but not all, Supported Boards. If your board does not meet Blinky’s Requirements, then Hello World is a good alternative.

Build the Blinky with west build, changing <your-board-name> appropriately for your board:

UbuntumacOSWindows

cd ~/zephyrproject/zephyr
west build -p auto -b <your-board-name> samples/basic/blinky

The -p auto option automatically cleans byproducts from a previous build if necessary, which is useful if you try building another sample.

Flash the Sample

Connect your board, usually via USB, and turn it on if there’s a power switch. If in doubt about what to do, check your board’s page in Supported Boards.

Then flash the sample using west flash:

west flash

You may need to install additional host tools required by your board. The west flash command will print an error if any required dependencies are missing.

If you’re using blinky, the LED will start to blink as shown in this figure:

Fig. 1 Phytec reel_board running blinky

Next Steps

Here are some next steps for exploring Zephyr:

• Try other Samples and Demos

• Learn about Application Development and the west tool

• Find out about west’s flashing and debugging features, or more about Flashing and Hardware Debugging in general

• Check out Beyond the Getting Started Guide for additional setup alternatives and ideas

• Discover Resources for getting help from the Zephyr community

Troubleshooting Installation

Here are some tips for fixing some issues related to the installation process.

Double Check the Zephyr SDK Variables When Updating

When updating Zephyr SDK, check whether the ZEPHYR_TOOLCHAIN_VARIANT or ZEPHYR_SDK_INSTALL_DIR environment variables are already set. See Updating the Zephyr SDK toolchain for more information.

For more information about these environment variables in Zephyr, see Important Environment Variables.

Asking for Help

You can ask for help on a mailing list or on Discord. Please send bug reports and feature requests to GitHub.

• Mailing Lists: users@lists.zephyrproject.org is usually the right list to ask for help. Search archives and sign up here.

• Discord: You can join with this Discord invite.

• GitHub: Use GitHub issues for bugs and feature requests.

How to Ask

Important

Please search this documentation and the mailing list archives first. Your question may have an answer there.

Don’t just say “this isn’t working” or ask “is this working?”. Include as much detail as you can about:

1. What you want to do

2. What you tried (commands you typed, etc.)

3. What happened (output of each command, etc.)

Use Copy/Paste

Please copy/paste text instead of taking a picture or a screenshot of it. Text includes source code, terminal commands, and their output.

Doing this makes it easier for people to help you, and also helps other users search the archives.

When copy/pasting more than 5 lines of text into Discord, create a snippet using three backticks to delimit the snippet.