Ebook Free Practical UML Statecharts in C/C++
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Practical UML Statecharts in C/C++
Ebook Free Practical UML Statecharts in C/C++
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Review
"This book and the free QP download are your entry into the 21st century of embedded systems programming." — Rob Wehrli (Knoxville, TN), Amazon.com review"It is rare to find an author who is so strong theoretically, while paying such close attention to implementation details like microcontroller resource conservation."-- Robert Jones (MI USA), Amazon.com review"This book took me from being a C programming novice, to writing 1000s of lines of embedded control systems code, that has been running reliably for several years, with just one bug - my own!"— Haitham Hindi "H.H." (Palo Alto, CA), Amazon.com review
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From the Author
The embedded software industry is in the midst of a major revolution. Tremendous amount of new development lays ahead. This new software needs an actual architecture that is inherently safer, more extensible, and easier to understand than the usual shared-state concurrency and blocking based on a traditional Real-Time Operating System (RTOS).This book provides and explains such a modern, event-driven architecture based on active objects (actors), hierarchical state machines, software tracing, graphical modeling and automatic code generation. While others only talk about these modern techniques, this book actually comes with practical, efficient, working software that has been battle-tested and proven in real-life systems.Welcome to the 21st century!
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Product details
Paperback: 750 pages
Publisher: Routledge; 2 edition (October 1, 2008)
Language: English
ISBN-10: 0750687061
ISBN-13: 978-0750687065
Product Dimensions:
7.4 x 1.7 x 9.7 inches
Shipping Weight: 2.8 pounds (View shipping rates and policies)
Average Customer Review:
3.8 out of 5 stars
29 customer reviews
Amazon Best Sellers Rank:
#1,016,659 in Books (See Top 100 in Books)
If you are an accomplished or aspiring embedded systems programmer and resort to the "superloop" as your foremost implementation method, you absolutely MUST read this book.While not new concepts to the industry, the concepts presented in Miro's book are certainly not commonplace in many of the embedded systems code I've seen over many years in the industry.While UML makes for a clean, now defacto standard for presenting concepts, the real beauty in Miro's book is the use of a readily-available frameworks for immediately adopting the many lessons-learned and provided in the book. These complete, well written and excellently coded frameworks are available under the GPL and an alternate, low-cost license for those who wish to keep their code private.For strong C programmers, the implementation of the frameworks is a delight as one reads through the code and is treated to an incredibly simple, lightweight and extremely powerful system that will forever put an end to your future plans to "superloop" again--albeit for any system where C (or C++) is adequately supported by the hardware. For anyone admitting that "we've always done superloop and it has always worked in the past," get ready for a real-time, highly responsive system that actually IS event driven and thrives in as little as a few bytes of RAM and perhaps a K of ROM.For those who must hold on to the "superloop is king" mindset, consider the consequences of adding to your superloop an entirely new set of features and how that may affect the timing through your loop. I started with the "dining philosophers" example code discussed in the book and ported it to my own board (using a Renesas H8S-2166 microcontroller) and augmented the code to be responsive to external events (mechanical switches). This required software debouncing. While my "example" was somewhat "trivial" in terms of what the functionality actually did, it is, in my opinion, extremely typical of changing requirements of both new and legacy code in the day-to-day evolution of embedded systems programming.My changes to the example code were to implement a "bike light" feature set. That is, whenever a switched was pressed, the bike light--if off--would illuminate. An LED on the board was used for this purpose. Pressed again, the light would blink. Pressed and held for 1 second while on or blinking, the light would turn off.The typical implementation in superloop would often require a considerate approach to ensure that the new functionality was "injected" into the "right" part of the loop, so as to be of minimal impact to other areas of critical timing code. If any kind of action within the new code delayed the loop processing, then the whole of the superloop could come under further scrutiny and therefore cause more pain as one trials and tests system responsiveness on a number of potential new fronts.Atop of this new functionality, the frameworks-provided QSpy code instrumentation system, which allows one to have a stream of information about the system states and transitions, was ported to use a UART on the H8S. Imagine adding all of this new functionality in a traditional superloop body of code. Now, imagine adding it in a matter of perhaps two hours using the frameworks AND not adversely impacting the "legacy" application code at all!One of the most beautiful aspects of these frameworks is the ability to focus strictly on the code necessary for the task at hand instead of the entire system as a whole. The frameworks substantially frees the programmer from having to manually manage system responsiveness typical of the superloop.Using UML to design and document an embedded system is relatively new to many embedded systems programmers. Miro also provides a free download stencil set for MS Visio for easily implementing statecharts, which should help those interested in pursuing the many benefits of the technology included in this book.I first met Miro at a developer's conference in San Diego, CA. One thing that comes out in his book and his discussions of this exciting technology is his passion for it. I was very interested in it, as he was displaying his software running on a very resource constrained microcontroller--all in about 40 bytes of RAM or a bit less.Drawn to his topic by his enthusiasm, I admired the frameworks even more as I began looking at the implementation and design of the code. The entire C bundle, with royalty-free 'private commerical use' license, one of either cooperative or preemptive schedulers (both are provided), event processor, code instrumentation support and more is all for under $2K. Of course, one may explore the entire frameworks for the cost of only a free download before ever making a licensing decision for a given product.Combined with the low-cost solution of using such powerful frameworks in conjunction with learning the valuable content of this book, teams everywhere can exploit the years of experience and very robust, capable code in a matter of hours instead of weeks, months and even years of doing things the "old school" way using superloops and other facilities instead of truly event-driven designs.This book and the free QF download are your entry into the 21st century of embedded systems programming. Because the code is provided in C, porting is rather easy and running on embedded systems and desktop systems is practical and easy. I was able to build and run the code as provided without modifications on my Linux, Mac and Windows systems and on the H8S and a Microchip PIC 24 with only a minimalist porting effort of about a half a day in each case. Imagine being able to run an entire real-time system that features excellent extensibility while freeing you from the rigors of managing superloop timing on your own hardware all within a few hours. Then, spend a couple of hours extending the system without impacting the rest of it? Lather, rinse, repeat...it is truly that simple and robust.Best of all, this book will open your eyes to modern methods and concepts for programming event-driven embedded systems. That is, systems that respond to internal and external events that naturally occur in all embedded systems designs. It is my firm belief that after reading this book and exploring the code on your own, you'll discover why I so heartily endorse it and now share the passion Miro has for this wonderful, very lightweight but robust, complete solution for modern embedded systems programming.
It is rare to find an author who is so strong theoretically, while paying such close attention to implementation details like microcontroller resource conservation. The Nano product, for example, shows he has his eye on the low end 8 bit embedded world, not just the Gigahertz microcontrollers used in smart phones and the like.I've tried all the ways to make state machines in C and assembler, and I have to say the function pointer method is by far the best. He spent lots of time on the underpinnings of both flat and hierarchical state machines, and went through the process of implementing simple state machines using the various methods that have been tried before. At the end, not only do you feel comfortable with complex state machines, but you can really understand WHY the way taught in the book is the best way. One it "clicks", you will never go back again. I'm completely sold.If that weren't enough, he adds a real-time framework to the state machine skeleton which includes a task scheduler, an event queue, and a built-in method to encapsulate the various state machines into active objects. This way, you can run concurrent orthogonal and nested state machines without getting lost in the details. It's all so well organized, I feel like I've been a hack programmer up until now.I do have a quibble though. It's not the product - it's the book. It's already getting a bit out of date. The book doesn't cover QM - the modeling tool - at all. It also doesn't cover QT integration, which is a great method of building your virtual prototype on your desktop before committing it to your target. If you want an end-to-end development environment, QM and QT are golden. QT is an outstanding C/C++ development environment in its own right, and the GUI features seal the deal.Finally, I hope the next version (which I will almost certainly buy) comes out on Kindle - to save some trees.
I am impressed, the book handles a difficult topic very well. BTW, this is my first 5-star rating, ever. One gets both a high-level picture, as well as detailed examples. What I especially appreciate is that the author anticipates my questions and covers them well. I am actually an application (.NET/GUI), not embedded, developer; yet this is by far the best source on state-machines and event-driven programming I have found. I did notice few typos, but they did not cause much confusion.
This is an excellent book describing the statecharts approach to state machine programming. My only complaint is that I wish more practical examples were discussed, top-to-bottom including their implementation on a number of target platforms, and slightly less attention paid to the theory. Other than that wish, this is still an excellent way to start coding state machines using UML statecharts.
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