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 | | From: | Xavier Warzee | | Subject: | Re: [ptII] VHDL / JHDL | | Date: | Fri, 03 Dec 2004 22:37:45 +0100 |
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 | Hi all,
I am currently using Ptolemy II to compose Web services, but I remember
I did a Ptolemy Classic/Cadence VHDL simulator integration during April
1997 at Berkeley with the help of Christopher Hylands.
If I remember well, I just needed to call Cadence scripts from Ptolemy.
Maybe with Ptolemy II, it is possible to call under Java similar scripts.
Xavier
Edward A. Lee a écrit :
>
> We integrated a VHDL simulator with Ptolemy Classic at one point...
> It worked through a demo, then was never maintained... It was a bit
> of a pain to get working, mostly because the VHDL simulator was not
> an open architecture (I don't recall which one we used...). A search
> for VHDL on the Ptolemy website publications page gives quite a few
> pertinent hits...
>
> Edward
>
> At 08:44 AM 10/15/2004 -0600, Mike Wirthlin wrote:
>
>> It looks like you need to integrate an existing VHDL simulator into
>> the continuous system domain of Ptolemy. I am not aware of anyone who
>> has done this but it should be possible to do.
>>
>> You would need to create a Ptolemy actor (probably in the DE domain)
>> that talks directly to your commercial VHDL simulator. Many simulators
>> have a simulation API that would allow you to communicate with
>> external tools (Ptolemy in this case) and custom IP models. This is
>> the approach we took for JHDL. In our case, we created a new domain
>> for JHDL and were able to interface our simulator (a statically
>> scheduled logic simulator) to other domains in Ptolemy.
>>
>> I hope this helps . . .
>>
>> - Mike
>>
>> arnould wrote:
>>
>>> Hello,
>>> Thaksn for your help and sorry for the delay of my answer but I had
>>> to meet the
>>> people who requests this to know better what that excatly is their need.
>>> They are currently rewriting the VHDL code into Matlab or C. They
>>> have tried to
>>> use Simulink to execute a analogic environnment to test the code,
>>> but the simulink engine is quickly over memory as far as the time
>>> step of the
>>> continuous system drives the whole simulation timestep.
>>> So there is no code generation issue here, what they want being to
>>> co-simulate
>>> some VHDL and a continuous time model in Ptolemy.
>>> They are going first to compare the performance of Ptolemy and
>>> Simulink on a
>>> simple model by rewriting the simulink model under Ptolemy and by
>>> using the Matlab
>>> Actor.
>>> The next question is : Is there any tool that simulate the execution
>>> of some VHDL
>>> code that would accept a connection to Java or Ptolemy or C ..
>>> ..so they would ba able to test directly there VHDL code without
>>> having to rewrite
>>> it in Matlab....
>>> Regards,
>>> Vincent
>>>
>>> Mike Wirthlin a écrit :
>>>
>>>> As Christopher mentions, we are not actively working on the
>>>> JHDL/Ptolemy II interface (although we might put some more work into
>>>> it if there was some interest).
>>>>
>>>> Can you tell me more about what you want to do with VHDL? Do you want
>>>> to co-simulate a VHDL model with Ptolemy-II? Or, do you want to
>>>> generate VHDL code from a model (I believe this has some support in
>>>> Ptolemy Classic)?
>>>>
>>>> We developed two different JHDL/Ptolemy II interfaces. First, we
>>>> created a JHDL "domain" that allowed you to simulate a JHDL circuit
>>>> within Ptolemy II. We also created a few actors based on our module
>>>> generator library. Second, we investigated code generation for JHDL.
>>>> The idea here was to generate a structural circuit in JHDL from a SDF
>>>> model.
>>>>
>>>> Hope this helps
>>>>
>>>> - Mike
>>>>
>>>> Christopher Brooks wrote:
>>>>
>>>>> Ptolemy Classic had an interface to VHDL, Ptolemy II does not.
>>>>>
>>>>> http://www.jhdl.org/ says:
>>>>> "JHDL is a set of FPGA CAD tools developed at Brigham Young
>>>>> University's Configurable Computing Laboratory that allows the user
>>>>> to design the structure and layout of a circuit, debug the circuit in
>>>>> simulation, netlist and interface for bit-stream synthesis, and so
>>>>> forth. It is an exploratory attempt to identify the key features and
>>>>> functionality of good FPGA tools."
>>>>>
>>>>> The JHDL/Ptolemy II interface has not had much work done on it
>>>>> lately.
>>>>>
>>>>> The JHDL/Ptolemy II interface is not currently shipping as part of
>>>>> Ptolemy II, though it is available in the CVS devel tree.
>>>>>
>>>>> I'm not sure if the JHDL/Ptolemy II interface would be much help or
>>>>> not in getting to VHDL. Seems like it would take quite a bit of
>>>>> effort.
>>>>>
>>>>>
>>>>> _Christopher
>>>>>
>>>>>
>>>>> --------
>>>>>
>>>>> Hi all,
>>>>>
>>>>> Is there any experience of interfacing existing VHDL code within
>>>>> Ptolemy
>>>>> ?
>>>>>
>>>>> Can JDHL help in doing this ?
>>>>>
>>>>> Regards,
>>>>>
>>>>> Vincent
>>>>>
>>>>> --------
>>>>>
>>>>> ----------------------------------------------------------------------------
>>>>>
>>>>> Posted to the ptolemy-hackers mailing list. Please send
>>>>> administrative
>>>>> mail for this list to:
>>>>> ptolemy-hackers-request@ptolemy.eecs.berkeley.edu
>>>>
>>>>
>>>> --
>>>> Michael J. Wirthlin
>>>> Assistant Professor
>>>> Electrical and Computer Engineering Voice: (801) 422-7601
>>>> Brigham Young University Fax: (801) 422-0201
>>>> 459 Clyde Building Email: wirthlin@ee.byu.edu
>>>> Provo, UT 84602 www.ee.byu.edu/faculty/wirthlin
>>
>>
>>
>> --
>> Michael J. Wirthlin
>> Assistant Professor
>> Electrical and Computer Engineering Voice: (801) 422-7601
>> Brigham Young University Fax: (801) 422-0201
>> 459 Clyde Building Email: wirthlin@ee.byu.edu
>> Provo, UT 84602 www.ee.byu.edu/faculty/wirthlin
>>
>> ----------------------------------------------------------------------------
>>
>> Posted to the ptolemy-hackers mailing list. Please send administrative
>> mail for this list to: ptolemy-hackers-request@ptolemy.eecs.berkeley.edu
>
>
> ------------
> Edward A. Lee, Professor
> 518 Cory Hall, UC Berkeley, Berkeley, CA 94720
> phone: 510-642-0455, fax: 510-642-2739
> eal@eecs.Berkeley.EDU, http://ptolemy.eecs.berkeley.edu/~eal
>
>
>
> ----------------------------------------------------------------------------
>
> Posted to the ptolemy-hackers mailing list. Please send administrative
> mail for this list to: ptolemy-hackers-request@ptolemy.eecs.berkeley.edu
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