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Re: eeschema for IC design


Hey Holger,

Thanks for the info. To clarify:
If I open eeschema (latest git master) and type i(r1) in the signal text
field it gives an error while if I type i(R1) (uppercase) it works.
This has nothing to do with my patch or the PDK, it's something weird going
on with case sensitivity.
This is a very puzzling error, because as you say ngspice appears to
lowercase the names, but then generates an error when given the lowercase
(the error seems to come from src/frontend/spiceif.c?)

On the eeschema side R1 is uppercase, maybe it's doing some lookup on the
eeschema side, and then sending wrong data to ngspice?
I'm at a loss.


On Sun, Oct 25, 2020 at 3:48 PM Holger Vogt <holger.vogt@xxxxxxxxxx> wrote:

> Seems to be a nice mixture of bug sources.
> @include[current] is probably a pdk bug. Who is naming a current source
> (first letter has to be i) 'include'?
> @r1[i] is the ngspice vector name for current through r1.
> There is no function i(r1) in ngsppice. So you have to read
> @r1[i] from ngspice and translate its name to i(r1) in
> eeschema, if you wish to do so.
> ngspice lower-cases all netlist entries.
>  > @m.xm2.msky130_fd_pr__nfet_g5v0d10v5[ib]
>  > @m.xm2.msky130_fd_pr__nfet_g5v0d10v5[ig]
>  > @m.xm2.msky130_fd_pr__nfet_g5v0d10v5[is]
>  > @m.xm2.msky130_fd_pr__nfet_g5v0d10v5[id]
> [ib] [ig] [is] are not supported for the BSIM4 MOS model,
> because these are no intrinsic model parameters. Therefore these
> vectors have length zero (except for [id]). They have been defined
> for the vernerable MOS1 - 9 models. I am considering adding these
> also for BSIM3/4.
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