Book Image

Embedded Programming with Modern C++ Cookbook

By : Igor Viarheichyk
Book Image

Embedded Programming with Modern C++ Cookbook

By: Igor Viarheichyk

Overview of this book

Developing applications for embedded systems may seem like a daunting task as developers face challenges related to limited memory, high power consumption, and maintaining real-time responses. This book is a collection of practical examples to explain how to develop applications for embedded boards and overcome the challenges that you may encounter while developing. The book will start with an introduction to embedded systems and how to set up the development environment. By teaching you to build your first embedded application, the book will help you progress from the basics to more complex concepts, such as debugging, logging, and profiling. Moving ahead, you will learn how to use specialized memory and custom allocators. From here, you will delve into recipes that will teach you how to work with the C++ memory model, atomic variables, and synchronization. The book will then take you through recipes on inter-process communication, data serialization, and timers. Finally, you will cover topics such as error handling and guidelines for real-time systems and safety-critical systems. By the end of this book, you will have become proficient in building robust and secure embedded applications with C++.
Table of Contents (17 chapters)

Working with data alignment

Processors read and write data not in bytes, but in memory words chunks that match their data address size. 32-bit processors work with 32-bit words, 64-bit processors with 64-bit words, and so on.

Reads and writes are most efficient when words are aligned the data address is a multiple of the word size. For example, for 32-bit architectures, the address 0x00000004 is aligned, while 0x00000005 is unaligned. On x86 platform, access to unaligned data is slower that to aligned. On ARM, however, access to unaligned data generates a hardware exception and lead to program termination:

Compilers align data automatically. When it comes to structures, the result may be surprising for developers who are not aware of alignment.
struct {
uint8_t c;
uint32_t i;
} a = {1, 1};

std::cout << sizeof(a) <&lt...