Book Image

Embedded Systems Architecture - Second Edition

By : Daniele Lacamera
5 (1)
Book Image

Embedded Systems Architecture - Second Edition

5 (1)
By: Daniele Lacamera

Overview of this book

Embedded Systems Architecture begins with a bird’s-eye view of embedded development and how it differs from the other systems that you may be familiar with. This book will help you get the hang of the internal working of various components in real-world systems. You’ll start by setting up a development environment and then move on to the core system architectural concepts, exploring system designs, boot-up mechanisms, and memory management. As you progress through the topics, you’ll explore the programming interface and device drivers to establish communication via TCP/IP and take measures to increase the security of IoT solutions. Finally, you’ll be introduced to multithreaded operating systems through the development of a scheduler and the use of hardware-assisted trusted execution mechanisms. With the help of this book, you will gain the confidence to work with embedded systems at an architectural level and become familiar with various aspects of embedded software development on microcontrollers—such as memory management, multithreading, and RTOS—an approach oriented to memory isolation.
Table of Contents (18 chapters)
Part 1 – Introduction to Embedded Systems Development
Part 2 – Core System Architecture
Part 3 – Device Drivers and Communication Interfaces
Part 4 – Multithreading

Parallel Tasks and Scheduling

When the complexity of the system increases and the software has to manage multiple peripherals and events at the same time, it is more convenient to rely on an operating system to coordinate and synchronize all the different operations. Separating the application logic into different threads offers a few important architectural advantages. Each component performs the designed operation within its running unit, and it may release the CPU while it is suspended, or waiting for input or a timeout event.

In this chapter, the mechanisms used to implement a multithreading embedded operating system will be covered. This will be done through the development of a minimalistic operating system tailored to the reference platform, and written step by step from scratch, providing a working scheduler to run multiple tasks in parallel.

The scheduler’s internals are mostly implemented within system service calls, and its design impacts the system’s...