Zephyr Example Application

This repository contains a Zephyr example application. The main purpose of this repository is to serve as a reference on how to structure Zephyr based applications. Some of the features demonstrated in this example are:

• Basic Zephyr application skeleton
• Zephyr workspace applications
• West T2 topology
• Custom boards
• Custom devicetree bindings
• Out-of-tree drivers
• Example CI configuration (using Github Actions)
• Custom west extension

This repository is versioned together with the Zephyr main tree. This means that every time that Zephyr is tagged, this repository is tagged as well with the same version number, and the manifest entry for zephyr will point to the corresponding Zephyr tag. For example, example-application v2.6.0 will point to Zephyr v2.6.0. Note that the main branch will always point to the development branch of Zephyr, also main.

Getting Started

Before getting started, make sure you have a proper Zephyr development environment. You can follow the official Zephyr Getting Started Guide. However, make sure to stop before the west init invocation, since that will instead be done with the instructions below.

Initialization

The first step is to initialize the workspace folder (my-workspace) where the zephyr app and all Zephyr modules will be cloned. You can do that by running:

# initialize my-workspace for the zephyr app (main branch)
west init -m https://github.com/zephyrproject-rtos/oss-eu-2022-zephyr-app --mr main my-workspace
# update Zephyr modules
cd my-workspace
west update

Build & Run

The application can be built by running:

west build -b $BOARD app

where $BOARD is the target board. The custom_plank board found in this repository can be used. Note that Zephyr sample boards may be used if an appropriate overlay is provided (see app/boards).

A sample debug configuration is also provided. You can apply it by running:

west build -b $BOARD app -- -DOVERLAY_CONFIG=debug.conf

Note that you may also use it together with rtt.conf if using Segger RTT. Once you have built the application you can flash it by running:

west flash