kicad-developers team mailing list archive

[Sylwester Kocjan <s.kocjan@xxxxx>]

Hi,

Thanks for pointing that. Maybe I'll try to prepare some tests in boost 
for symulation to test my changes better.

However, I'd like to share my opinion during this occasion. I think that 
parsing SPICE commands in KiCad is too much effort. Holger Vogt said 
once that this is very difficult because SPICE language was designed 
before lex&yacc become popular. I believe optimal way for simulation 
would be following:
- strive to handle all types of simulations on DIALOG_SIM_SETTINGS tabs
- get rid of user command in schematic sheet
- two additional text fields on simulation options: pre- and post-sim 
user directives
- passing these user directives directly to output netlist
- pre-sim can be for example specific .options, post-sim could be .meas
either of them can be .control ... .endc
- ideally if all these settings could be saved in file and loaded from menu

Sure, that's a lot of work but hopefully I can help with some of this.

Best regards,
Sylwester

On 23/10/2019 15:39, Seth Hillbrand wrote:
> On 2019-10-22 23:35, Maciej Suminski wrote:
> > Hi Sylwester,
> >
> > I admit I have not checked your patch in action, but it seems that it
> > will not accept ".op" command, unless it is followed by a space. Since
> > ".op" does not take any parameters, I presume it is a rare case when one
> > adds an extra space after the command.
> >
> > Regards,
> > Orson
>
> Thanks Orson!  You are right, it was skipping the unpadded .op.  I 
> missed this as the .tran command does print the DC operating point and I 
> was checking in a multi-command circuit.  Good catch.  I've fixed up the 
> command parsing to ensure we pad the command lines.
>
> This does bring up, however, that our simulator does not handle .op 
> well.  It won't probe the values or print them easily.  LTSpice prints 
> the DC Operating Point table for all nets after running in this mode. 
> Not that LTSpice is the model of usability but there may be something to 
> this.
>
> -Seth
>
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