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ADE Explorer Variables to VerilogA Parameter Arrays

Tjaart

With reference to this post:

https://community.cadence.com/cadence_technology_forums/f/custom-ic-design/20875/how-to-pass-array-of-parameters-through-cdf-down-to-a-veriloga-code

It seems like the GUI of the new ADE Explorer tool does not allow lists (eg.: [1.1 2.0 3]) to be passed to the Spectre netlist as a parameter containing a list of values.

I get an invalid expression error message from the GUI when I try to input the list to an ADE Explorer variable. It the asks me to specify the parameter using double quotes. When I do this however, the Spectre netlist initializes the Spectre parameter to a string (eg.: myparam="[1.1 2 0.3]"). I then get a spectre error message: "A vector is expected as the value for parameter 'myparam'".

I have tried playing around with variants using commas, a single quote at the start, curly bracktes etc, but have not been able to get it running.

Is there an updated way to pass parameter arrays to VerilogA modules from variables declared in the new ADE Explorer GUI?

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  • Andrew Beckett

    You can use strcat("1.1 2 0.3]") instead. The issue is that strictly speaking vector parameters weren't supported before because the expression language was "AEL" (Analog Expression Language) which didn't support vectors - however, the unsupported syntax in the AEL expressions just got passed directly to the simulator. In Explorer/Assembler, they are treated as SKILL expressions, and hence the issue - we can workaround this by using strcat() around the vector (in quotes).

    I recently wrote an article with some code to automatically convert such vector parameters to have the strcat around them: How to convert design variables which are spectre vectors to work with Explorer/Assembler

    Regards,

    Andrew.

  • Tjaart
    in reply to Andrew Beckett

    Thanks a lot Andrew.

    Your suggestion is working on my side and your article is useful and interesting.

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  • Tjaart
    in reply to Andrew Beckett

    Thanks a lot Andrew.

    Your suggestion is working on my side and your article is useful and interesting.

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