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instTerms

AM202410081932

Hi to all,

I am trying to write an SKILL code to create a schematic. In my code I use "instTerms" to obtain the terminals of an instantiated cell (Let's imagine it is a simple NMOS which is given as a predesigned cell), and then I will connect a wire to each of the terminals. When I run the whole code by command line, the returned terminals by "instTerms" are empty(nil) but when I try to debug it line by line it works properly. As more information, I call it for the instantiated cell, and I should say the cell is instantiated without any problem. This is just the problem of finding its terminals. 

Does anybody have any idea?

Thank you very much in advance.

Amir

  • Amir,

    This is because just creating an instance using dbCreateInst() will not create the instTerms on the device. When you have the schematic editor open though, the incremental extractor will cause the instTerms to be created - which is why you see it working when evaluating line by line. You either need to create them yourself using dbCreateInstTerm, or you could call schExtractConn to do an initial connectivity extraction (you'll get checker warnings about floating pins though) - that would construct the instTerms too. Or use the terminals on the master instead to find the information you need.

    Andrew

  • in reply to Andrew Beckett

    Hi Andrew,

    Thank you for your reply.

    I called dbSave after the dbCreateInst and it worked. But I will try schExtractConn as well.

    Thanks,

    Amir

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