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Running an external shell script from within a Verilog-a block

mwb1

Hi,


I use a perl script that calculates the parasitics for an inductor; you give it the topology and it spits out  a pi-model to include parasitics. How can I run this script from within virtuoso and have it dynamically update part of my circuit? Im guessing I wrap it up in a verilog-a block? Ideally, Id like to do something like this:

1) create a verilog-a block that takes one argument, inductance.

2) In the verilog-a is the pi-model with default values.

3) When I "netlist", the verilog-a "calls" a script that updates the values.

Can I do this all from ADE? I know I can get away with something similar with an ocn script, Im very familiar with using those but I need this solution to be gui driven because the other people using it are afraid of the command-line.

Thanks

Matt

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  • chanakaya

    Hi Matt,

    I don't think the way to do this is through verilogA. For one, verilogA code is directly passed to simulator and nothing invokes it at 'netlisting' stage. What you might want to try is to

    1. Have the pi model in schematic with default values.
    2. Modify the values to this pi model components during net listing stage.

    You can call custom functions during net listing. This function can call your external Perl script and then populate the pi model appropriately. Look for documentation on asiChangeFlowchartStep function and to add your own function during netlisting.

    Hope this helps.

    --at

Reply
  • chanakaya

    Hi Matt,

    I don't think the way to do this is through verilogA. For one, verilogA code is directly passed to simulator and nothing invokes it at 'netlisting' stage. What you might want to try is to

    1. Have the pi model in schematic with default values.
    2. Modify the values to this pi model components during net listing stage.

    You can call custom functions during net listing. This function can call your external Perl script and then populate the pi model appropriately. Look for documentation on asiChangeFlowchartStep function and to add your own function during netlisting.

    Hope this helps.

    --at

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