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 method functionality. certainly, so much embedded structures at their center repre despatched a cautious department and layout of and software program elements of the process to do that job successfully, versions and strategies are priceless performance. to catch program habit, wishes and approach implementation constraints. Formal modeling should be useful in addressing those initiatives. As with such a lot engineering domain names, co-design perform defines the kingdom of the it seeks so as to add new services in process conceptualization, mod paintings, notwithstanding eling, optimization and implementation. those advances -particularly these on the topic of synthesis and verification initiatives -direct1y depend on formal lower than status of procedure habit and function measures. present perform in procedure modeling depends exploiting high-level programming frameworks, comparable to SystemC, EstereI, to catch layout at more and more better degrees of ab straction and makes an attempt to minimize the process implementation activity. whereas elevating the abstraction degrees for layout and verification initiatives, to be really helpful, those ways also needs to supply for reuse, version of the prevailing highbrow estate (IP) blocks.
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Additional resources for Formal Methods and Models for System Design: A System Level Perspective
These roles determine when actors perform internal computation, update their internal state, and perform external communication. There is a wide variety of useful models of computation with different semantics for representing behavior. Additionally, different models of computation can be translated down to lower level platforms in different ways, with different design tradeoffs. A few interesting models of computation are summarized below: Synchronous Dataflow (SDF) : Actors communicate through queues and send or receive a fixed number of tokens each time they are fired.
Since a composed system can be seen either as one big interface or one big state machine the refinement notions introduced above carry over in a straightforward mann er. Given two composed systems SI and S2' We write SI ->es S2 if absCSIIF(SI) ->IF abs CSIIF(S2) Again this is a straightforward concept. 5 General Refinement of Systems through Levels of Abstractions It is the idea of granularity refinement that we do not take care of the internal structure of systems, but only compare their interface abstractions in tenns of refinement pairs.
In this tree of components the leaves are state machines. In our case the usage of streams and stream processing function is the reason for the remarkable flexibility of our model toolkit and the simplicity of the integration. This work demonstrates a number of significant properties that a modeling technique should show to support a methodology. The properties lead to a comprehensive theory of modeling. Software development is a difficult and complex engineering task. It would be very surprising if such a task could be carried out properly without a proper theoretical framework.