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Copy CDF between pcells, callback fails in copy

RVERP

I have an application where I create a new pcell that is based on existing techno pcells. For this I copy the CDF from the techno pcell. I make a copy with cdfGetBaseCellCDF of the techno CDF and place it on my new pcell with cdfCopyCDF. The datatype is specified as baseCellData.

What I want to become is that the callback of my original and my copy behaves in the same way. Changing one CDF parameter and triggering the CB that then updates a variety of other parameters. I used this application in a number of different technologies and the application always behaves as aspected.

Until now, now I have a techno that doesn't seem to work this way. I copy the CDF to my new pcell, but when I change a parameter I get following error:

*** Error in routine cdfParseFloatString:
Message: *Error* cdfParseFloatString: argument #1 should be a string (type template = "t") at line 230 of file "*ciwInPort*"
Entering new debug toplevel due to error:

So the CB uses an incorrect variable, but since the baseCell CDF is a copy, everything must be correct here. I did a cross check between my original CDF of the techno pcell and my copied one. The default values are identical, but in my copy the CB fails while in the original it obviously passes. Are there any other sources of data the cdf CB can use that I'm overlooking here?

  • Andrew Beckett

    It might be that the CDF callback for the technology is expecting other data to be there. For example, some foundries use a set of properties on the cell property bag (data.dm) to set default values and guide the callbacks; maybe those also have to be copied across to the destination cell?

    It's hard to diagnose without seeing the callback code unfortunately, because it rather depends on what is being passed to cdfParseFloatString.

    Andrew

  • RVERP
    in reply to Andrew Beckett

    Thanks for the info. I have to look into it but I'm afraid copying the data.dm is not an option for my application.

    Having some insight in the callback procedure would indeed help a lot. I'll ask the fab, maybe they send me a copy SmileySmileySmiley

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