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)
1
Part 1 – Introduction to Embedded Systems Development
4
Part 2 – Core System Architecture
8
Part 3 – Device Drivers and Communication Interfaces
13
Part 4 – Multithreading

Technical requirements

You can find the code files for this chapter on GitHub at https://github.com/PacktPublishing/Embedded-Systems-Architecture-Second-Edition/tree/main/Chapter6.

Bitwise operations

The examples associated with this chapter make extensive use of bitwise operations for checking, setting, and clearing single bits within larger registers (in most cases, 32-bit long). You should already be familiar with bitwise logic operations in C.

The operations commonly used in the examples are the following:

  • Setting the Nth bit in the register R via the assignment R |= (1 << N): The new value of the register R will contain the result of the bitwise OR operation between its original value and a bitmask containing all zeros, except the bit corresponding to the value we want to set, which is set to the value one
  • Clearing (resetting) the Nth bit in the register R via the assignment R &= ~(1 << N): The new value of the register is the result of a bitwise...