Applications of Ptolemy in Continuous and SDF Domain presented by Kesava R' Talupuru

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Applications of Ptolemy in Continuous and SDF
Domainpresented byKesava R. Talupuru
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Outline

• Introduction
• Different Domains in Ptolemy
• CT and SDF domain
• Applications of SDF and CT domain
• Conclusion

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Introduction

• Used for Heterogeneous Modeling, Simulation, and
  design of Concurrent systems
• Modeling Representing a system or subsystem
  formally
• Design Act of defining a system or subsystem

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Introduction (contd)

• Principle The choices of models of computation
  strongly affect the quality of a system design
• Objective Support the construction and
  interoperability of executable models that are
  built under a wide variety of models of
  computation
• Component-based design Involves disciplined
  interactions between components governed by a
  model of computation

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Different Domains in Ptolemy

• Continuous Time (CT)
• Synchronous Data Flow (SDF)
• Discrete-Events (DE)
• Finite State Machines (FSM)
• Discrete Time (DT)
• Communicating Sequential Processes (CSP)
• Distributed Discrete Events (DDE)
• Process Networks (PN)

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Continuous Time Domain

• Used to design and simulate the systems that can
  be modeled using ordinary differential equations
• System Specification in CT domain
• Conservation Law Model
• Signal Flow Model
• Advantages of Signal flow model over Conservation
  model
• More Abstract
• More flexible and extensible
• Consistent with other models of computation
• Compatible with the conservation law model

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Continuous Time Directors

• CT Multi Solver Director Only serves as a top
  level director
• CT Mixed Signal Director Can be used both at
  the top-level or inside a composite actor
• CT Embedded Director Can only be contained in a
  CT Composite actor

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Synchronous Data Flow (SDF) Domain

• Useful for modeling simple data flow systems
  without complicated flow of control, such as
  signal processing systems
• Main Issues in SDF
• Dead Lock
• Consistency of data rates
• The value of the iterations parameter

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Applications of SDF and CT Domain
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Ripple Carry Adder
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Results of Ripple Carry Adder
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Poisson Distribution of Signals
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Results of Poisson Distribution
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RC-decay
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Results RC-decay
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Absolute Sine Wave Generation
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Results of Absolute Sine Wave
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Conclusion

• Different Applications of Ptolemy in SDF and CT
  domain have been discussed
• Ptolemy also allows interaction between different
  domains