[kepler-dev] How do I create nested loops in Kepler

[Dan Higgins]

FYI, I just checked the shelves of the UCSB library and could not find 
the volume for 1988 (although other years, both preceeding and 
following, are there) :-(

Dan

Christopher Brooks wrote:

>I looked on line, and the reference is from a chapter from a
>book that is not scanned in anywhere, the detail are below:
>
>VLSI signal processing, III / edited by Robert W. Brodersen, Howard
>  S. Moscovitz.  
>Publisher New York : IEEE Press, c1988.  
>Description xi, 536 p. : ill. ; 24 cm.  
>Note: "The chapters in this book are based on presentations given at
>  the IEEE Acoustics, Speech, and Signal Processing Society Workshop on
>  VLSI Signal Processing held November 2-4, 1988 at the Monterey Plaza
>  Hotel, Monterey, California."  
> "Published under the sponsorship of the IEEE Acoustics, Speech, and
> Signal Processing Society."  
>Note: Includes bibliographies and index.  
>ISBN 0879422483    
>
>It looks like the UCSB library might have it.
>UCSB:Main Lib TK5102.5.V563 1988 Annex  not checked out  
>
>UCLA also has it, but the UCB and UCD libraries do not.
>
>Edward probably has a copy in his library.  I won't be on campus until
>next week, but I'll see if Mary can dig it up in the meantime.
>
>_Christopher
>
>--------
>
>    
>    Edward:
>    
>    This is very interesting and I'd like to get a hold of it.
>    Maybe one of your students could scan it and creat a PDF version!? 
>    
>    Also, in reply to Dan's comment:
>    
>     > >I've tried various ways using Ramp actors and Composite actors but
>     > >cannot seem to get this simple case to work.
>    
>    I guess that this is not as simple a case as one might wish (in simple
>    dataflow and/or block diagram languages).. just like doing procedural
>    loops in functional or logic programming is tricky (and one has to use
>    recursive patterns instead)
>    
>    Probably Edward's paper will be very instructive in dealing with these
>    issues. Also, I think there are nice new opportunities for doing
>    procedural stuff nicely in Kepler by using Ptolemy's state machines...
>    
>    Bertram
>    
>    
>    
>    
>    Edward A. Lee writes:
>     > 
>     > Dan:
>     > 
>     > This is a very good question. In fact, I wrote a paper once on this
>     > subject:
>     > 
>     > E. A. Lee, "Recurrences, Iteration, and Conditionals in Statically
>     > Scheduled Block Diagram Languages," in VLSI Signal Processing III,
>     > Ed. R. W. Brodersen and H. S. Moscovitz, IEEE Press, New York, 1988.
>     > 
>     > This paper is not on the web, although I could get you a copy if you lik
>   e...
>     > 
>     > For your example, the attached model illustrates one simple technique.
>     > It also elaborates on it, producing the iteration indices for both
>     > the outer an inner iterations. There are also much more elaborate
>     > models one can create using higher-order components, like the
>     > IterateOverArray actor and many others that we haven't gotten
>     > around to porting from Ptolemy Classic...
>     > 
>     > Edward
>     > 
>     > 
>     > 
>     > At 03:58 PM 7/5/2005 -0700, Dan Higgins wrote:
>     > >Hi All,
>     > >
>     > >     I am having great difficulty in figuring out how to handle various
>     > >looping constructs in Kepler/Ptolemy. So I ask if someone can explain
>     > >how to handle nested loops (using SDF and/or PN directors)?
>     > >
>     > >     For example, assume I want to count from 0 to 3 twice in a row so
>     > >that the output on a final text display is
>     > >0
>     > >1
>     > >2
>     > >0
>     > >1
>     > >2
>     > >
>     > >I've tried various ways using Ramp actors and Composite actors but
>     > >cannot seem to get this simple case to work.
>     > >
>     > >Thanks,
>     > >Dan
>     > >
>     > >--
>     > >*******************************************************************
>     > >Dan Higgins                                  higgins at nceas.ucsb.edu
>     > >http://www.nceas.ucsb.edu/    Ph: 805-893-5127
>     > >National Center for Ecological Analysis and Synthesis (NCEAS)
>     > >Marine Science Building - Room 3405
>     > >Santa Barbara, CA 93195
>     > >*******************************************************************
>     > >
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>   v
>     > 
>     > ------------
>     > Edward A. Lee
>     > Professor, Chair of the EE Division, Associate Chair of EECS
>     > 231 Cory Hall, UC Berkeley, Berkeley, CA 94720
>     > phone: 510-642-0253 or 510-642-0455, fax: 510-642-2845
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>


-- 
*******************************************************************
Dan Higgins                                  higgins at nceas.ucsb.edu
http://www.nceas.ucsb.edu/    Ph: 805-893-5127
National Center for Ecological Analysis and Synthesis (NCEAS) 
Marine Science Building - Room 3405
Santa Barbara, CA 93195
*******************************************************************