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)

8051 microcontroller interrupts

The 8051 microcontroller supports six interrupt sources  reset, two hardware interrupts, two timer interrupts, and a serial communication interrupt:

Interrupt number Description Offset in bytes
Reset 0
0 External interrupt INT0 3
1 Timer 0 (TF0) 11
2 External interrupt INT1 19
3 Timer 1 (TF1) 27
4 Serial  36

The interrupt vector array is located at address 0; each entry except reset is 8 bytes in size. Though a minimal ISR can fit into 8 bytes, normally, the entries contain code that redirects execution to the actual ISR located elsewhere.

The reset entry is special. It is activated by the reset signal and immediately jumps to the address where the main program is located.

8051 defines a special register called Interrupt Enable (EA), which is used to enable and disable interrupts. Its 8-bits are allocated...