Re: [myhdl-list] Lists of signals now do appear in vcd file

[Jan D. <ja...@ja...>]

I am considering to incorporate this feature more
or less as per this patch.

I don't want to create a different function - this
could be a configuration of traceSignals.

One question: should I make memory tracing optional?
Or is it something that people just will always
want to use when available?

Jan


On 03/28/2012 09:52 PM, Frederik T. wrote:
> Hello everybody,
>
> I just had a look into _traceSignals.py . I wrote a few lines to write
> flattened memories into the vcd file. The vcd standard does not support
> multidimensional arrays. You can see it in the attached screenshot.
>
> If you have a signal like
>
> ram = [Signal(intbv(0, max=LMAX, min=-LMAX)) for i in range(N)]
>
> the list items now appear as ram(0), ram(1), .. , ram(N-1) in the vcd file.
>
> I attached a patch and the patched files, too.
>
> It would be nice if you could test this code on your designs. If there
> might be any problems or there are any please report them to me.
>
> This patch announces a new trace option called
> "traceSignalsAndMemories". If you use "traceSignals" no memories are dumped.
>
> Example:
>
> # The normal trace
> tb = traceSignals(testBenchDut)
> sim = Simulation(tb)
> sim.run()
>
> # can be changed to
> tb = traceSignalsAndMemories(testBenchDut)
> sim = Simulation(tb)
> sim.run()
> # .. to trace the memories as well.
>
> It works with both the stable 0.7-version and the version from the
> repository.
>
>
> Happy debugging,
>
> Frederik
>
>
> Am 28.03.2012 15:08, schrieb Oscar Diaz:
>> 2012/3/28 Frederik T.<sp...@ne...>:
>>> Hello Oscar,
>>>
>>> that sounds great. I would test it, if it would help you.
>>
>> This is a "very" preliminary version of signal_monitor, a class to
>> generate vcd files in myhdl. As you can guess, it has little
>> documentation (sorry for that) and probably needs a lot of adjustments
>> and improvements. Feel free to test it and send me any suggestions,
>> doubts or even complains about it. I'll try to finish it ASAP and
>> upload in the myhdl wiki (or somewhere else if needed).
>>
>> I hope this helps you or anyone on the mail list.
>>
>> Best regards
>>
>>>
>>>
>>> Regards,
>>>
>>> Frederik
>>>
>>> Am 28.03.2012 13:28, schrieb Oscar Diaz:
>>>> 2012/3/27 Christopher Felton<chr...@gm...>:
>>>>> On 3/27/2012 9:43 AM, Frederik T. wrote:
>>>>>> Hello everybody,
>>>>>>
>>>>>> I have a question concerning lists of signals. Whenever I use a list of
>>>>>> signals I don't see they don't appear in the vcd file created by
>>>>>> traceSignals(), see gtkwave.png .
>>>>>>
>>>>>
>>>>> That is correct, currently a "List of Signals" is not traced with
>>>>> traceSignals.
>>>>
>>>> I had this problem a couple months ago, and I make a custom vcd
>>>> generator that adds manually the signals that you need, assuming you
>>>> had the references to the desired signals (and it supports lists and
>>>> dicts of signals). The main idea is to make an object that returns
>>>> generators that react to traced signals and generate the vcd file. It
>>>> is completely unrelated to traceSignals function.
>>>>
>>>> It works for my needs but I'm afraid it needs refactoring. I can send
>>>> my code if you need it, anyway I'm planning to fix it, upload
>>>> somewhere and receive feedback on the list.
>>>>
>>>> As soon I fix it I'll announce it on the list.
>>>>
>>>>>
>>>>> Regards,
>>>>> Chris
>>>>>
>>>>>
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>>>>
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-- 
Jan Decaluwe - Resources bvba - http://www.jandecaluwe.com
     Python as a HDL: http://www.myhdl.org
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