Formal Methods and Models for System Design: A System Level by Manfred Broy (auth.), Rajesh Gupta, Paul Le Guernic, Sandeep

By Manfred Broy (auth.), Rajesh Gupta, Paul Le Guernic, Sandeep Kumar Shukla, Jean-Pierre Talpin (eds.)

Perhaps not anything characterizes the inherent heterogeneity in embedded sys­ tems than the facility to choose from and software program implementations of a given process functionality. certainly, such a lot embedded structures at their center repre­ despatched a cautious department and layout of and software program elements of the procedure to do that job successfully, types and strategies are valuable performance. to trap software habit, wishes and method implementation constraints. Formal modeling should be necessary in addressing those initiatives. As with such a lot engineering domain names, co-design perform defines the country of the it seeks so as to add new features in process conceptualization, mod­ artwork, even though eling, optimization and implementation. those advances -particularly these on the topic of synthesis and verification projects -direct1y depend on formal lower than­ status of process habit and function measures. present perform in method modeling depends exploiting high-level programming frameworks, akin to SystemC, EstereI, to catch layout at more and more better degrees of ab­ straction and makes an attempt to minimize the approach implementation job. whereas elevating the abstraction degrees for layout and verification projects, to be really helpful, those ways also needs to supply for reuse, variation of the present highbrow estate (IP) blocks.

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Extra resources for Formal Methods and Models for System Design: A System Level Perspective

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Broy, K. Stolen: Specification and Development of Interactive Systems: Focus on Streams, Interfaces, and Refinement. Springer 2001 [7] G. Berry, G. Gonthier: The ESTEREL Synchronous Programming Language: Design, Semantics, Implementation. INRIA, Research Report 842, 1988 [8] D. Harel: Statecharts: A Visual Formalism for Complex Systems. Science of Computer Programming 8,1987,231 - 274 [9] R. Hettler: Zur Übersetzung von E/R-Schemata nach SPECTRUM. R. Hoare: Communicating Sequential Processes. Prentice Hall, 1985 [11] 1.

FigA shows a levellabeled "actor-oriented models" at a level above programs. The platforms at this level are relatively immature, but playa central role in the future of codesign. In particular, actor-oriented models focus on the separation of concerns between communication and computation [10]. We place actor-oriented models at a level between programs and applications for several reasons. Firstly, actor-oriented design provides a platform which abstracts both hardware and software. Without this level, the gap between "applications" and "programs" is large enough to force very early decisions about hardware vs.

Our notion of actor-oriented design is related to the work of Gul Agha and others. The term "actor" was introduced in the 1970's by earl Hewitt of MIT to describe the concept of autonomous reasoning agents [8]. The term evolved through the work of Agha and others to describe a formalized model of concurrency [1]. Agha's actors each have an independent thread of control and communicate via asynchronous message passing. We additionally embrace a larger family of models of concurrency that are often more constrained than general message passing.

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