Re: [myhdl-list] Simulation control

[Juan P. C. <jp...@gm...>]

Hi Christopher,

The link on "mixed mode" simulation is a proof of concept, but very naive.
I've put together a blog post discussing the difficulties that one might
find:

http://caram.cl/developing-a-mixed-signal-simulator

The link about interactive simulation is more along the lines of what would
be required, but using the function calls, not the interactive console. I
see it's using a debugger and that might make it extremely slow. It would
be ideal if this functionality was built into the simulator. If I were to
implement this functionality into the simulator, any idea on where I should
start? I haven't seen any documentation about the operation of the
simulator.

Thanks,

JP

On Mon, Apr 6, 2015 at 8:24 AM, Christopher Felton <chr...@gm...>
wrote:

> On 4/5/15 3:06 PM, Juan Pablo Caram wrote:
> > I apologize for the confusion. I'm hoping to do do this with code, not a
> > debugger. I'm trying to create a mixed signal simulator exchanging data
> > between ngspice and myhdl.
>
> This might be of interest:
> http://old.myhdl.org/doku.php/projects:mixedmodesimulation
> http://old.myhdl.org/doku.php/projects:interactive_simulation_using_ipython
>
> >
> > I would like to be able to simulate until signal X toggles or changes,
> > get the time, run spice until this time is reached, update signals in
> > myhdl and spice, resume myhdl simulation, etc.
>
> Why can't you do this with the existing Python debuggers?
>
> >
> > Sometimes the clock comes from spice, I detect the change in output from
> > a comparator, stop the simulation, and must toggle the corresponding
> > signal in the digital side and resume the digital.
> >
> > I couldn't find any fine controls for the simulation in MyHDL. SimPy,
> > that looks quite similar in terms of using generators, seem to have
> > "simulate until" kind of controls. I wonder if this is already possible
> > or if someone had tried to implement such functionality.
>
> This control does not exist in the MyHDL simulator.
> Currently, you can only instruct the simulator to
> run N simulation steps: `Simulation(test()).run(1000)`
>
> Regards,
> Chris
>
>
>
>
>
>
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