Re: [Qucs-devel] qucs-qt4

[Bastien R. <rou...@gm...>]

Le samedi 10 novembre 2007, Nick Shaforostoff a =C3=A9crit=C2=A0:
> =D0=92 =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BE=D1=
=82 Friday 09 November 2007 11:02:10 pm Bastien ROUCARIES
>
> =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=B0):
> > > i compiled qucs-qt4 and found no logic gates in 'components' dockview.
> >
> > Gates are on Components/ digital componens
>
> i mean in qucs-qt4

qucs-qt4 on a rewrite project of qucs...
>
> > Have you tried to add delay using two not gate back to back? If you do
> > not add delay trigger do not converge...
>
> it worked as I expected after I had added delays to NOR components
> (it's very strange that they have 0 delay by default)
>
> > > also, logical circuits can be modeled in more detailed form,
> > > when transient phenomena is taken into account.
> >
> > Read technical documentation section 10.6 for transient simulation.
>
> ok, i see that transient simulation is kinda works for boolean components
> (at first, i thought that simulation just hangs, but after being left for
> some time, it produced results :)  btw it could make use of several cpu
> cores instead of one

We could perhaps use multiple core using some parallel solver. But do not=20
think it will be easy, parallel solver are really difficult to code.

> > > (maybe we should better do modeling ourselves rather then rely on
> > > freehdl)
>
> freehdl is really slow for such an easy task.
> what if i implement digital modeling in python?

We could also code in verilog. I think it will be faster. (need to check)
> particularly, it would really make win32 users life easier
> (stand-alone win32 python program takes ~2 megs after compression)
>
> > > in my program i implemented A* algorithm of finding the shortest path
> > > for wires (which takes into account obstacles -- other components and
> > > wires).
>
> A* is for graphical representation of wires

ok so you autoroute wire. Could be useful but not for now. We are working t=
o=20
get a basic version of qucs qt4 what will be minimalbut working. But it wil=
l=20
interesting to code it after stabilization phase.

> > Could you please say what is the use of your program? routing, wiring?
>
> circuitry_engineering teaching
>
>
> i really need to make replacing program (qucs) as easy to use as the
> current (proprietary) one (of course, the latter has its own disadvantages
> too)

We agree about he goal.=20

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"ROUCARIES Bastien"
                                                   roucaries.bastien@gmail.=
com
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