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

Generic timers

Providing a SysTick timer is not mandatory for low-end microcontrollers. Some targets may not have a system timer, but all of them expose some kind of interface to program several general-purpose timers for the program to be able to implement time-driven operations. Timers in general are very flexible and easy to configure and are generally capable of triggering interrupts at regular intervals. The STM32F4 provides up to 17 timers, each with different characteristics. Timers are in general independent from each other, as each of them has its own interrupt line and a separate peripheral clock gate. On the STM32F4, for example, these are the steps needed to enable the clock source and the interrupt line for timer 2. The timer interface is based on a counter that is incremented or decremented at every tick. The interface exposed on this platform is very flexible and supports several features, including the selection of a different clock source for input, the possibility...