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pascalkuthe / OpenVAF

An innovative Verilog-A compiler
https://openvaf.semimod.de/
GNU General Public License v3.0
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Module attributes #54

Open dwarning opened 1 year ago

dwarning commented 1 year ago

It seems module attributes are accepted by openVAF: (* ngspiceModelGroup="semi", ngspiceLevelNumber="1", ngspiceDeviceName="nigbt", ngspiceTypeVariable="N" *) module nigbt (a, g, c); But the question is, where they are will landing and how can I use them in simulator?

pascalkuthe commented 1 year ago

Attributes are an extension mechanism for Verilog-A. They are intended to allow adding extra information not covered by the standard. However, there is basically no definition of what to do with them except for a couple of standard attributes so OpenVAF ignores all attributes it doesn't know. This mostly matches commercial simulators as far as I know.

Any kind of attribute like this need to be added to the OSDI standard to show up in the simulator. I think we could add a generic group attribute (OpenVAF already supports something like that for parameters I think) but the rest doesn't make much sense to me. The way OSDI is integrated into ngspice it's possible to use any other type variable than N (and level is not supported at all) while the device name is just the module name.

dwarning commented 1 year ago

Yes - that is what I meant. Can you provide a structure with module attributes in the ngspice/osdi interface and fill them by OpenVAF. Please mark it as feature request. Thank you.