Book Image

The Insider's Guide to Arm Cortex-M Development

By : Zachary Lasiuk, Pareena Verma, Jason Andrews
Book Image

The Insider's Guide to Arm Cortex-M Development

By: Zachary Lasiuk, Pareena Verma, Jason Andrews

Overview of this book

Cortex-M has been around since 2004, so why a new book now? With new microcontrollers based on the Cortex-M55 and Cortex-M85 being introduced this year, Cortex-M continues to expand. New software concepts, such as standardized software reuse, have emerged alongside new topics including security and machine learning. Development methodologies have also significantly advanced, with more embedded development taking place in the cloud and increased levels of automation. Due to these advances, a single engineer can no longer understand an entire project and requires new skills to be successful. This book provides a unique view of how to navigate and apply the latest concepts in microcontroller development. The book is split into two parts. First, you’ll be guided through how to select the ideal set of hardware, software, and tools for your specific project. Next, you’ll explore how to implement essential topics for modern embedded developers. Throughout the book, there are examples for you to learn by working with real Cortex-M devices with all software available on GitHub. You will gain experience with the small Cortex-M0+, the powerful Cortex-M55, and more Cortex-M processors. By the end of this book, you’ll be able to practically apply modern Cortex-M software development concepts.
Table of Contents (15 chapters)
Part 1: Get Set Up
Part 2: Sharpen Your Skills

Overview of bare-metal software

The term bare-metal software refers to code with no operating system (OS) or application programming interface (API). It is written directly onto hardware, thus the name of writing software on the “bare-metal” hardware.

If implementing your application is a straightforward task, then bare-metal software makes sense and is a good place to start developing any application. Bare-metal tasks are either polled or triggered by interrupts. More complex scheduling functionality is enabled through an OS. While OSs can be overly complex for simple applications, they introduce a necessary abstraction and management layer needed for most applications. Increasingly, Cortex-M devices perform many tasks (reading sensors, processing sensor data, transmitting data, and more) that can be managed easier by an OS.

Note that you can add functionality to your bare-metal system through middleware stacks—which will be covered later in this chapter...