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Simulators >> Circuit Simulators >> Loops in Spectre MDL
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Message started by newbspec on Apr 21^st, 2008, 10:44am

Title: Loops in Spectre MDL
Post by newbspec on Apr 21^st, 2008, 10:44am

I'm new to Spectre and want to do a binary search using MDL. I'd like change a the input period on each call to trans. Can I do this in Spectre MDL?

Are statements like for, while and until available in MDL?

The following flags the "for" as an invalid statement in MDL.

for (insig=500; insig<800; insig=insig+100) {
run timedelay as theparms
}

Thank you.

Title: Re: Loops in Spectre MDL
Post by Scott Flinchbaugh on Apr 21^st, 2008, 3:37pm

newbspec,

You should read the SpectreMDL User Guide to get more familiar with the SpectreMDL syntax.

The for, while and until are not supported.

To iterate over a variable using MDL there is a "foreach" statement.
To implement your for loop you should do the following:

foreach insig from swp( start=500, stop=800, step=100 )
{
run timedelay as theparms
}

Alternatively, you can also explicitly state the parameter values as follows:

foreach insig from { 500, 600, 700, 800 }
{
run timedelay as theparms
}

There is also a binary search and multiple variable search (optimization) capability in SpectreMDL, please
review the reference manual for more information on them. Examples are provided.

Thanks,
sflinch