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Schematic entry parameter as a function of instance name

yoyega

 Hi, I have a question concerning a schematic entry. Let's assume that I have defined a subcircuit that has pwl souce inside. This pwl source reads the point/time values from a file, and I want that the name of the file in the definition of the pwl source to be automatically set as a funcion of the name of the instance of the subcircuit. Does anyone knows how to do this?

Example:

subckt myckt
    I0 ( node1 node2 ) isource type=pwl file="a_function_of_the_name_of_the_instance_of_myckt"
    ...
end myckt

This way, if I have to instantiate several instances of myckt, each instance would automatically read point/time values from different files.

Thanks,
Pedro

Parents

  • It seems to me that the best approach would be to write Skill to generate your schematic. Making the parameter dynamically depend on the instance name wouldn't help you very much. Since you'll probably need to explicitly define the instance names, you might as well explicitly define the parameter (pwl file name) at the same time. You could also enhance the code below to wire up your array.

    procedure(buildPixelArray(@optional (cv geGetEditCellView()))
      let((myLib myCell myView origin instName fileName)
        myLib = "myLib"
        myCell = "pixelCkt"
        myView = "symbol"
        for(col 0 31
            for(row 0 31
                origin = list(row col)
                sprintf(instName "Pixel_%02d_%02d" row col)
                sprintf(fileName "/path/to/pwl/%s.pwl" instName)
                inst = dbCreateParamInstByMasterName(cv myLib myCell myView
                    instName
                    origin
                    "R0"
                    1
                    list(
                        list("myPwlParam" "string" fileName)
                    )
                )
            )
        )
      ) ;let
    ) ;proc

    Run this code with an empty schematic open for edit.

    Derek

Reply

  • It seems to me that the best approach would be to write Skill to generate your schematic. Making the parameter dynamically depend on the instance name wouldn't help you very much. Since you'll probably need to explicitly define the instance names, you might as well explicitly define the parameter (pwl file name) at the same time. You could also enhance the code below to wire up your array.

    procedure(buildPixelArray(@optional (cv geGetEditCellView()))
      let((myLib myCell myView origin instName fileName)
        myLib = "myLib"
        myCell = "pixelCkt"
        myView = "symbol"
        for(col 0 31
            for(row 0 31
                origin = list(row col)
                sprintf(instName "Pixel_%02d_%02d" row col)
                sprintf(fileName "/path/to/pwl/%s.pwl" instName)
                inst = dbCreateParamInstByMasterName(cv myLib myCell myView
                    instName
                    origin
                    "R0"
                    1
                    list(
                        list("myPwlParam" "string" fileName)
                    )
                )
            )
        )
      ) ;let
    ) ;proc

    Run this code with an empty schematic open for edit.

    Derek

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