Book Image

Hands-On RTOS with Microcontrollers

By : Brian Amos
Book Image

Hands-On RTOS with Microcontrollers

By: Brian Amos

Overview of this book

A real-time operating system (RTOS) is used to develop systems that respond to events within strict timelines. Real-time embedded systems have applications in various industries, from automotive and aerospace through to laboratory test equipment and consumer electronics. These systems provide consistent and reliable timing and are designed to run without intervention for years. This microcontrollers book starts by introducing you to the concept of RTOS and compares some other alternative methods for achieving real-time performance. Once you've understood the fundamentals, such as tasks, queues, mutexes, and semaphores, you'll learn what to look for when selecting a microcontroller and development environment. By working through examples that use an STM32F7 Nucleo board, the STM32CubeIDE, and SEGGER debug tools, including SEGGER J-Link, Ozone, and SystemView, you'll gain an understanding of preemptive scheduling policies and task communication. The book will then help you develop highly efficient low-level drivers and analyze their real-time performance and CPU utilization. Finally, you'll cover tips for troubleshooting and be able to take your new-found skills to the next level. By the end of this book, you'll have built on your embedded system skills and will be able to create real-time systems using microcontrollers and FreeRTOS.
Table of Contents (24 chapters)
Section 1: Introduction and RTOS Concepts
Section 2: Toolchain Setup
Section 3: RTOS Application Examples
Section 4: Advanced RTOS Techniques

The FreeRTOS Scheduler

The FreeRTOS scheduler takes care of all task switching decisions. The most basic things you can do with an RTOS include creating a few tasks and then starting the scheduler which is exactly what we'll be doing in this chapter. Creating tasks and getting the scheduler up and running will become something you'll be well accustomed to after some practice. Even though this is straightforward, it doesn't always go smoothly (especially on your first couple of tries), so we'll also be covering some common problems and how to fix them. By the end, you'll be able to set up your own RTOS application from scratch and know how to troubleshoot common problems.

We'll start by covering two different ways of creating FreeRTOS tasks and the advantages each offer. From there, we'll cover how to start the scheduler and what to look...