Showing posts with label state machines. Show all posts
Showing posts with label state machines. Show all posts

Modeling Software with Finite State Machines: A Practical Approach Review

Modeling Software with Finite State Machines: A Practical Approach
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Modeling Software with Finite State Machines: A Practical Approach ReviewThis book is excellent for making the reader understand how a complete software application can be easily controlled using state machines, simplifying the architecture. The writing can be hard to follow sometimes and the authors make claims about areas they are not expert in that are clearly false but when it comes to state machines and developing applications using them, they clearly know what they are talking about. Just skip the non-state machine parts of the book.Modeling Software with Finite State Machines: A Practical Approach OverviewModeling Software with Finite State Machines: A Practical Approach explains how to apply finite state machines to software development. It provides a critical analysis of using finite state machines as a foundation for executable specifications to reduce software development effort and improve quality. This book discusses the design of a state machine and of a system of state machines. It also presents a detailed analysis of development issues relating to behavior modeling with design examples and design rules for using finite state machines. This volume describes a coherent and well-tested framework for generating reliable software for even the most complex tasks. The authors demonstrate that the established practice of using a specification as a basis for coding is wrong. Divided into three parts, this book opens by delivering the authors' expert opinions on software, covering the evolution of development as well as costs, methods, programmers, and the development cycle. The remaining two parts encourage the use of state machines: promoting the virtual finite state machine (Vfsm) method and the StateWORKS development tools.

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Microprogrammed State Machine Design Review

Microprogrammed State Machine Design
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Microprogrammed State Machine Design ReviewMy first job in industry, back in the 1970s, was writing instruction set microcode for a mainframe processor, back before the RISC revolution. Then, through the 1980s, bit-slice processors appeared in everything from graphics controllers, to disk and network interfaces, to DSP applications of every kind. Between the RISC trend starting in the late 1980s and the centralization of processor design in a few major corporate labs, however, microcoded control was nearly forgotten.
With the rise of FPGA processing, microcoded control deserves another look. I find it ideal in cases where a problem is too big, complex, or fast-changing for hand-coded state machines to be practical, but where unusual hardware requirements can't be met with assembly programming. Microcoded control fills that middle ground nicely, with efficiency approaching a state machine's and with ease of use and modification close to that of regular programming. If you want a thorough introduction to microcoded logic design and controllers, this book does the job amazingly well.
Unfortunately, parts of the content have aged badly. Even in 1993, when this was first published, microcode was already old-school. Many of the bit-slice products and controllers, including the venerable 2900 family, were vanishing from the market even then - so chapters that describe such logic families are historical documents, at best. This book's real value lies in describing how microcontollers work, allowing modern logic designers to resurrect what was good in them and create controllers of their own, tailored to modern needs.
If you already have a firm handle on logic design basics but find your control logic getting too convoluted and unmaintainable, give this a shot. It will show you a disciplined but highly adaptable way to implement your control plane. You have too much else to do in filling a mega-LUT FPGA to let your controller take up your time.
- wiredweirdMicroprogrammed State Machine Design OverviewMicroprogrammed State Machine Design is a digital computer architecture text that builds systematically from basic concepts to complex state-machine design. It provides practical techniques and alternatives for designing solutions to data processing problems both in commerce andin research purposes. It offers an excellent introduction to the tools and elements of design used in microprogrammed state machines, and incoporates the necessary background in number systems, hardware building blocks, assemblers for use in preparing control programs, and tools and components for assemblers .The author conducts an in-depth examination of first- and second-level microprogrammed state machines. He promotes a top-down approach that examines algorithms mathematically to exploit the simplifications resulting from choosing the proper representation and application of algebraic manipulation. The steps involved in the cycle of design and simulation steps are demonstrated through an example of running a computer through a simulation. Other topics covered in Microprogrammed State Machine Design include a discussion of simulation methods, the development and use of assembler language processors, and comparisons among various hardware implementations, such as the Reduced Instruction Set Computer (RISC) and the Digital Signal Processor (DSP). As a text and guide, Microprogrammed State Machine Design will interest students in the computer sciences, computer architectects and engineers, systems programmers and analysts, and electrical engineers.

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