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Laplante, Seppo J. Real-time data processing. System design. Ovaska, Seppo J. L37 This book is an introductory text about real - time systems — systems where timeliness is a crucial part of the correctness of the system.
Real - time software designers must be familiar with computer architecture and organization, oper-ating systems and related services, programming languages, systems and soft-ware engineering, as well as performance analysis and optimization techniques.
The text provides a pragmatic discussion of these subjects from the perspective of the real - time systems designer. This book is intended for junior — senior level and graduate computer science, computer engineering and electrical engineering students, as well as practicing software, systems and computer engineers. Earlier editions of this book have been used in this way to teach short courses for several industrial clients. Finally, we intend for the book to be a desk reference of long - lasting value, even for experienced real - time systems designers and project managers.
However, for uniformity of discussion, certain points are illustrated, as appropriate, in generic assembly language and C. While the provided program codes are not intended to be ready - to - use, they can be easily adapted with a little tweaking for use in a real system. This book is organized into nine chapters that are largely self - contained. Thus, the material can be rearranged or omitted depending on the background and interests of the instructor or reader.
Each of the chapters contains both easy and more challenging exercises that stimulate the reader to confront actual problems. The exercises, however, cannot serve as a substitute for carefully planned laboratory work or practical experience. Much of the basic vocabulary relating to real - time systems is developed along with a discussion of the main challenges facing the real - time system designer.
Besides, a brief historical review is given. The purpose of this chapter is to foreshadow the rest of the book as well as quickly acquaint the reader with pertinent terminology. The second chapter presents a detailed review of central computer archi-tecture concepts from the perspective of the real - time systems designer. Chapter 3 provides the core of the text for those who are building practical real - time systems. It also covers special problems inherent in these designs, such as deadlock and priority inversion.
An evaluative review of several widely used programming lan-guages in real - time systems design, with respect to these features, follows. Next, structured and object - oriented meth-odologies are discussed as alternative paradigms for requirements writing. At the end of this chapter, an extensive case study is provided.
An emphasis on their applicability to real - time systems is made throughout. A compre-hensive design case study is also provided.
Chapter 7 discusses performance analysis techniques based on diverse esti-mation approaches. The proposed toolset is fully usable even before it is pos-sible to perform any direct measurements. Moreover, a pragmatic discussion on the use of classical queuing theory for analyzing real - time systems is pro-vided.
Finally, a focused analysis of memory utilization in real - time systems is presented. Chapter 8 discusses additional software engineering considerations, includ-ing the use of software metrics and techniques for improvinclud-ing the fault - tolerance and overall reliability of real - time systems.
Later in the chapter, different techniques for improving reliability through rigorous testing are discussed. Systems integration and performance optimization issues are also considered. In Chapter 9 , we look to the future of real - time systems hardware, software, and applications.
Much of this chapter is speculative, and we had great fun imagining things yet to come and the way things ought to be with respect to real - time systems technology. This chapter forms a fruitful basis for class dis-cussions, debates, and student projects.
When our book is used in a university course, typically students are asked to build a real - time multitasking system of their choice. Usually, it is a game on a PC, but some students can be expected to build embedded hardware controllers of moderate complexity. The application should be useful or at least pleasing, so some sort of a game is a good choice. The mini - project should take no more than 20 hours and cover all phases of the software life cycle model discussed in the text.
Many solid theoretical treatments of real - time systems exist, and where applicable, they are noted. Nonetheless, these books or journal articles are sometimes too theoretical for practicing software engineers and students who are often impatient to wade through the derivations for the resultant payoff.
They want results that they can use now in the trenches, and they want to see how they can be used, not just know that they exist. In this text, an attempt is made to distill the most valuable of the theoretical results, combined with practical experience and insight to provide a toolkit for the practitioner. This book contains extensive bibliographies at the end of each chapter.
However, if any were inad-vertently overlooked, the authors wish to correct the unfortunate error. The most fundamental change in the fourth edition is a new co - author, Dr. The fourth edition addresses the important changes that have occurred in the theory and practice in the construction of real - time systems since the publishing of the third edition in Chapters 1 — 8 have been carefully revised to incorporate new material, correction of errors, and elimination of outdated material.
Moreover, Chapter 9 is a brand - new chapter devoted to future visions on real - time systems. Totally new or substantially revised discus-sions include:. In addition, several new examples have been included to illustrate various important points.
Hence, it is with pride and a sense of accomplishment that we are pre-senting this timely and carefully composed book to students and practicing engineers. Gilreath and P. Laplante , Software Engineering for Image Processing. Phil Laplante wishes to thank his dear friend Dr. Seppo Ovaska for being the perfect collaborator. And this book is now as much his vision and legacy, as the fi rst three editions were mine. Phil also wishes to thank his wife Nancy and his children Christopher and Charlotte for putting up with the seemingly endless work on this manuscript and too many other projects to mention over these many years.
Seppo: I am grateful to my wife Helena and my sons Sami and Samu for everything we have experienced together. Although it is a tiny gesture com-pared with all that you have given to me, I humbly dedicate this book to you. And fi nally, Phil, it was a true pleasure to work with you in this exciting and rewarding book project. Phillip A. Laplante and Seppo J. But to computer, software, and systems engineers the preferred form is real - time , and this is the convention that we will follow throughout this text.
The reservation clerk enters appropri-ate information into the computer, and a few seconds lappropri-ater a boarding pass is printed. Is this a real - time system?
Section 1. The birth of real - time systems, in general, as well as a selective evolution path related to relevant technological innovations, is discussed in Section 1.
Finally, Section 1. System programs consist of software that interfaces with the underlying computer hardware, such as device drivers, interrupt handlers, task schedulers, and various programs that act as tools for the development or analysis of application programs. An operating system is a specialized collection of system programs that manage the physical resources of the computer.
As such, a real - time operating system is a truly important system program Anh and Tan, Certain design considerations play a role in the design of system programs and application software intended to run in real - time environments. When the internal details of the system are not of particular interest, the mapping function between input and output spaces can be considered as a black box with one or more inputs entering and one or more outputs exiting the system see Fig.
A system is fundamentally altered if a component joins or leaves it. It has a purpose. Figure 1. A real - time control system including inputs from a camera and multiple sensors, as well as outputs to a display and multiple actuators. A classic representation of a real - time system as a sequence of schedulable jobs. Every real - world entity, whether organic or synthetic, can be modeled as a system. In computing systems, the inputs represent digital data from hardware devices or other software systems.
The inputs are often associated with sensors, cameras, and other devices that provide analog inputs, which are converted to digital data, or provide direct digital inputs. The digital outputs of computer systems, on the other hand, can be converted to analog outputs to control external hardware devices, such as actuators and displays, or used directly without any conversion Fig. Modeling a real - time control system, as in Figure 1. The latter view is simplistic in that it ignores the usual fact that the input sources and hardware under control may be highly complex.
Look again at the model of a real - time system shown in Figure 1.
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Laplante Published Computer Science. Laplante's best-selling and widely-acclaimed practical guide to building real-time systems. This book is essential for improved system designs, faster computation, better insights, and ultimate cost savings.
A cyclic executive   is an alternative to a real-time operating system. It is a form of cooperative multitasking , in which there is only one task. The sole task is typically realized as an infinite loop in main , e. The basic scheme is to cycle through a repeating sequence of activities, at a set frequency AKA time-triggered cyclic executive. For example, consider the example of an embedded system designed to monitor a temperature sensor and update an LCD display. The LCD may need to be written twenty times a second i.
Laplante spent several years as a software engineer and project manager working on avionics, computer-aided design, and software test systems. He has authored or edited twenty-seven books and has published more than scholarly articles. He has served as a visiting scholar at Utah State University, Virginia Tech, and the University of Passau, Germany, and has published more than articles in peer-reviewed journals.
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All rights reserved. Published simultaneously in Canada. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under Section or of the United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, Inc. No warranty may be created or extended by sales representatives or written sales materials. The advice and strategies contained herein may not be suitable for your situation.
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Real-time systems design and analysis: tools for the practitioner / Phillip A. Laplante, Seppo P. A. Laplante, Software Engineering for Image Processing.Reply
Real-time systems design and analysis: tools for the practitioner / Phillip A. Laplante, Seppo. J. Ovaska.—4th ed. p. cm. ISBN (hardback). 1.Reply