Introduction to Zephyr Part 8: Multithreading | DigiKey

We show you how multithreading can be used to execute multiple tasks concurrently in Zephyr RTOS, improving system responsiveness and efficiency. This tutorial uses a sample program to demonstrate how to blink an LED and print messages to the console simultaneously by creating and managing threads. You'll learn how to define thread stacks, initialize GPIOs, and manage execution with Zephyr's multithreading APIs. You can find a written version of this tutorial here: https://www.digikey.com/en/maker/tuto... The GitHub repository for this course (including solutions to the challenges) can be found here: https://github.com/ShawnHymel/introdu... Learn how Zephyr's threading APIs simplify thread creation and synchronization, making it easy to manage independent tasks. Proper stack allocation ensures stable execution, while Devicetree abstractions allow for portable GPIO configurations. This example serves as a foundation for more complex multithreaded applications. From there, we dive into thread synchronization using mutexes. In a separate example, we show how to handle user input/output via serial terminal to update a variable shared between two threads. Access to the variable is protected via mutex (lock). Finally, we give you the challenge of using Zephyr’s message queue system to pass data between threads. We only scratch the surface of multithreading in these examples. While we touch on priorities, mutexes, and semaphores, multithreading can become complicated very quickly. Zephyr's robust support for multithreading makes it an excellent choice for responsive embedded systems. If you would like to learn more about multithreading concepts and real-time operating systems, we recommend checking out our Introduction to RTOS series:    • Introduction to RTOS Part 1 - What is a Re...   Official Zephyr documentation: https://docs.zephyrproject.org/latest... Introduction to RTOS:    • Introduction to RTOS Part 1 - What is a Re...   ESP32-S3-DevKitC: https://www.digikey.com/en/products/d... Maker.io - https://www.digikey.com/en/maker DigiKey’s Blog – TheCircuit https://www.digikey.com/en/blog Connect with DigiKey on Facebook   / digikey.electronics   And follow us on X: https://x.com/digikey 0:00 Intro 0:56 Thread Demo 11:31 Thread Priority Levels 13:41 Thead Demo Test 18:00 Mutex Demo 30:12 Challenge: Sensor Reading Queue 32:05 Conclusion