Author: Miguel Gazquez

After our initial blog post on Zephyr in which we discovered how to download, build and flash Zephyr on two different boards, in this second blog post, we will dive into the code of Zephyr to understand how exactly the Blinky example works. To illustrate this, we will use the same boards as in our last blog post: an Arduino Nano 33 BLE, and a STM32L562E-DK.

We will first look at how the example application determines which LED to blink and where it’s plugged in, and then we will look at the code responsible for blinking the LED.

Continue reading “Understanding Zephyr’s Blinky Sample”

Zephyr is an open-source real-time operating system, used mainly in embedded devices, with a focus on small systems, thanks to its very small footprint.

This post is a quick startup guide to show how to run Zephyr on two different boards, from two different vendors:

• The Arduino Nano 33 BLE, which internally relies on the Nordic Semiconductor nRF52840 micro-controller, centered on a Cortex-M4 core.
• The STM32L562E-DK, which internally relies on the ST STM32L562QE micro-controller, centered on a Cortex-M33 core.

In this post, we will show how to install all the tools needed to build and run Zephyr, then run some samples, until we get access to the Zephyr shell over USB.

Continue reading “Getting started with Zephyr”