PTOLEMY II - CiteSeerX

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Actor Libraries MultiplyDivide (extends TypedAtomicActor): Multiply tokens on the multiply input channels, and divide by tokens on the divide input channels. Quantizer (extends Transformer): Produce an output token with the value in levels that is closest to the input value. Remainder (extends Transformer): Produce an output token with the value that is the remainder after dividing the token on the input port by the divisor. Scale (extends Transformer): Produce an output that is the product of the input and the factor. TrigFunction (extends Transformer): Produce an output token with a value that is a function of the input. The function is specified by the function attribute, where valid functions are acos, asin, atan, cos, sin, and tan. 4.3.10 Matrix The matrix library supports matrix manipulations. Currently this library is very small; if you need matrix operations that are not in this library, then very likely they are available in the expression language (see the Expression chapter). You can access these using the Expression actor. MatrixToSequence (extends SDFTransformer): Unbundle a matrix into a sequence of output tokens. On each firing, this actor writes the elements of the matrix to the output as a sequence of output tokens. MatrixViewer (extends Sink): Display the contents of a matrix input. SequenceToMatrix (extends SDFTransformer): Bundle a specified number of input tokens into a matrix. On each firing, this actor reads rows times columns input tokens and writes one output matrix token with the specified number of rows and columns. 4.3.11 Random The random library (see figure 4.2) consists of actors that generate random data. All actors in this library have a seed parameter. A seed of zero is interpreted to mean that no seed is specified. In such cases, a seed based on the current machine time and the actor instance is used to make it unlikely that two identical sequences are produced. Bernoulli (extends RandomSource): Produce a random sequence of booleans (a source of coin flips). DiscreteRandomSource (extends RandomSource): Produce tokens with the given probability mass function. Gaussian (extends RandomSource): Produce a random sequence with a Gaussian distribution. Rician (extends RandomSource): Produce a random sequence with a Rician or Rayleigh distribution. Uniform (extends RandomSource): Produce a random sequence with a uniform distribution. 4.3.12 Real Time The behavior of the real time actors is affected by the amount of elapsed real time. RealTimePlotter (extends Plotter): Plot input data as a function of elapsed real time. 142 Ptolemy <strong>II</strong>
Actor Libraries Sleep (extends Transformer): Produce as output the tokens received on input after an amount of real time specified by the sleepTime parameter. VariableSleep (extends Transformer): Produce as output the tokens received on input after an amount of real time specified by the sleepTime input. NOTE: This will likely be replaced by a version of Sleep with a PortParameter. WallClockTime (extends Source): Output the elapsed real time in seconds. 4.3.13 Signal Processing Audio The signal processing library is divided into sublibraries. The audio library provides actors that can read and write audio files, can capture data from an audio input such as a CD or microphone, and can play audio data through the speakers of the computers. It uses the javasound library, which is part of the Sun Microsystems’ Java 2 Standard Edition (J2SE) version 1.3.0 and higher. The AudioCapture and AudioPlayer actors are unusual in that they have coupled parameter values. Changing the parameters of one results in the parameters of the other being changed. Also, as of this writing, they have the restriction that only one of each may be used in a model at a time, and that if there are two models that use them, then those two models may not be executed simultaneously. AudioCapture (extends Source): Capture audio from the audio input port of the computer, or from its microphone, and produce the samples at the output. AudioReader (extends Source): Read audio from a URL, and produce the samples at the output. AudioPlayer (extends Sink): Play audio samples on the audio output port of the computer, or from its speakers. AudioWriter (extends Sink): Write audio data to a file. Communications The communications library collects actors that support modeling and design of digital communication systems. ConvolutionalCoder (extends Transformer): Encode an input sequence of bits using a convolutional code. DeScrambler (extends Transformer): Descramble the input bit sequence using a feedback shift register. HadamardCode (extends Source): Produce a Hadamard codeword by selecting a row from a Hadamard matrix. HammingCoder (extends Transformer): Encode an input sequence of bits using Hamming code. HammingDecoder (extends Transformer): Decode an input sequence of bits using Hamming code. Heterogeneous Concurrent Modeling and Design 143
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PTOLEMY II HETEROGENEOUS CONCURRENT
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VOLUME 1 INTRODUCTION TO PTOLEMY II
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Volume 1 Contents Introduction to P
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2.10.3. Constructing Modal Models 8
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7. MoML 191 7.1. Introduction 191 7
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1 Introduction Author: Edward A. Le
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Introduction heterochronous dataflo
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Introduction A major emphasis in Pt
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Introduction determine when actors
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Introduction provides levels of vis
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Introduction is a guard, and the se
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Introduction well. All of these are
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Introduction clients to update thei
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Introduction will be supplied with
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Introduction 1.3.12 Synchronous Dat
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Introduction FIGURE 1.10. Refinemen
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Introduction occlusions due to terr
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Introduction tion. The overall arch
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Introduction kernel.attributes This
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Introduction 1.5.2 Overview of Key
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Introduction Actor interfaces are k
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Heterogeneous Concurrent Modeling a
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Introduction actor actor.gui data.e
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Introduction cient, scalable, and u
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Introduction 1.5.8 Future Capabilit
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Introduction Appendix A: UML — Un
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Introduction grams, the only constr
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2 Using Vergil Authors: Edward A. L
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Using Vergil 2.2.2 Executing a Pre-
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Using Vergil The Lorenz attractor m
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Using Vergil The Continuous-Time (C
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Using Vergil box in figure 2.11. En
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Using Vergil Don’t panic! Excepti
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Using Vergil tions are a normal par
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Using Vergil 2.4 Hierarchy Ptolemy
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Using Vergil Then using these ports
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Using Vergil the default 0.1 to 0.0
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Using Vergil pan window, it is easy
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Using Vergil FIGURE 2.33. The pan w
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Using Vergil we have modified the c
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Using Vergil model, simply copy (or
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Using Vergil A key issue is to deci
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Using Vergil instances. This proble
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Using Vergil quick tour for more de
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Using Vergil uses the index in the
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Using Vergil AddSubtract actor, and
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Using Vergil If you look inside the
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Using Vergil If you look inside the
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Using Vergil transition (or right c
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Using Vergil Once you have created
Page 101 and 102: Using Vergil The grid is turned off
Page 103 and 104: Authors: Edward A. Lee Xiaojun Liu
Page 105 and 106: Expressions classes to create a gen
Page 107 and 108: Expressions The % operation is a mo
Page 109 and 110: Expressions attribute, which includ
Page 111 and 112: Expressions 3.3.5 State Machines Ex
Page 113 and 114: Expressions whose value is an array
Page 115 and 116: Expressions from it. For instance,
Page 117 and 118: Expressions defined. For example, >
Page 119 and 120: Expressions length is given by the
Page 121 and 122: Expressions Thus, for example, you
Page 123 and 124: Expressions number. With one additi
Page 125 and 126: Expressions value. For example, fix
Page 127 and 128: Expressions In the example in figur
Page 129 and 130: Expressions A.2 Basic Mathematical
Page 131 and 132: Expressions A.3 Matrix, Array, and
Page 133 and 134: Expressions A.5 Signal Processing F
Page 135 and 136: Expressions TABLE 8: Functions perf
Page 137 and 138: 4 Actor Libraries Authors: Elaine C
Page 139 and 140: Actor Libraries properly in the CT
Page 141 and 142: Actor Libraries ing that multiple c
Page 143 and 144: Actor Libraries TypedAtomicActor «
Page 145 and 146: Actor Libraries SequenceScope (exte
Page 147 and 148: Actor Libraries UnsignedByteArrayTo
Page 149 and 150: Actor Libraries MobileFunction (ext
Page 151: Actor Libraries LogicFunction (exte
Page 155 and 156: Actor Libraries VariableFIR (extend
Page 157 and 158: Actor Libraries Integrator: Integra
Page 159 and 160: Actor Libraries Figure 4.4 shows th
Page 161 and 162: 5 Designing Actors Authors: Christo
Page 163 and 164: Designing Actors /** Javadoc commen
Page 165 and 166: Designing Actors although with most
Page 167 and 168: Designing Actors import ptolemy.act
Page 169 and 170: Designing Actors makes such actors
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Page 173 and 174: Designing Actors morphic actor comp
Page 175 and 176: Designing Actors To get data polymo
Page 177 and 178: Designing Actors public class Seque
Page 179 and 180: Designing Actors be used in domains
Page 181 and 182: Designing Actors alComm actor. Beca
Page 183 and 184: Designing Actors attribute has valu
Page 185 and 186: Designing Actors import ptolemy.act
Page 187 and 188: 6 Coding Style Authors: Christopher
Page 189 and 190: Coding Style /* One line descriptio
Page 191 and 192: Coding Style Copyright (c) 2004 The
Page 193 and 194: Coding Style @version $Id: NamedObj
Page 195 and 196: Coding Style } We use instead the i
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Page 201 and 202: Authors: Edward A. Lee Steve Neuend
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MoML cutes it forever, until you hi
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MoML A second difference between ou
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MoML
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MoML 7.3.3 Names and Classes Most M
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MoML Here, the element named
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MoML implement. 7.3.7 Doc Element S
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MoML It is also sometimes necess
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MoML then there will be a link t
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MoML found. For example, if the cla
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MoML it cannot collide with the nam
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MoML The rendering of the icon is d
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MoML 7.4.5 Deleting Entities, Relat
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MoML This unlinks a port from the s
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MoML model. The EntityLibrary class
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MoML Suppose that using incremental
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MoML Generate a sine wave.
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MoML
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MoML Number of iterations in
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MoML -P- The f
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MoML -P- The phase,
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8 Custom Applets Authors: Edward A.
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Custom Applets html code, see the J
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Custom Applets public class Tutoria
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Custom Applets then the result of
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Custom Applets 8.3.5 Using Model Pa
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Custom Applets ptolemy/domains/doma
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References [1] G. Agha, Actors: A M
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[33] S. A. Edwards, “The Specific
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[67] E. Kohler, The Click Modular R
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[95] J. Liu, X. Liu, T. J. Koo, B.
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[132]W. R. Sutherland, "The on-Line
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Glossary abstract syntax ..........
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Ptolemy II ........................
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Index Symbols - in UML 41 # in UML
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coin flips 142 Color class 173 colo
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entity in XML 198 EntityLibrary cla
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Director class 159 inverse FFT 124
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CompositeEntity class 206 nextPower
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safety 34 SampleDelay actor 78, 138
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type constraint 155 type constraint
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