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expression to get a scalar after a sweep

davidzti

Hello,

I found some info on this subject posted a few years ago, but wasn't able to find a definitive solution.  I've been trying to get a scalar output from a sweep and use it in other tests via calcVal function, similar in spirit to these couple posts:

https://community.cadence.com/cadence_technology_forums/f/38/t/30795

https://community.cadence.com/cadence_technology_forums/f/38/t/17712

However, I can't figure out how to do it!  I wanted to ask if this functionality is available (to evaluate expression on a data set, vs on a per-point basis)?  If so, would someone kindly advise on how I can accomplish this?  (I'm on 6.1.6).

Many thanks in advance,

David

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  • davidzti

    Hi Andrew,

    I gave your suggestion a try, and sure enough, it worked!  Thank you for that pointer.  Changing the EvalType to "corners" produced a scalar min_spread_code, and placed its value in the "Nominal" column in the Results tab.  So far so good  I then assigned calcVal("min_spread_code" "test1") to a variable trim_code in a downstream test (let's say test2), and attempted to re-run the sweep using min_spread_code as the optimal trim code.  But sims always error out complaining that I'm passing "nil" to variable trim_code.  I'm hoping it's just a matter of syntax.  I also tried using calcVal("min_spread_code" "test1" ?cornerName "Nominal"), but to no avail.

    The only other thing I can think of is that both test1 and test2 rely on the variable trim_code, and somehow this creates a problem.  In test1, I use it in the corner setup as means to increment trim codes while sweeping temperature.  In test2 I want to assign the best trim code to it, and re-run the sweeps.  Perhaps I'm using the calcVal feature incorrectly?

    David

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  • davidzti

    Hi Andrew,

    I gave your suggestion a try, and sure enough, it worked!  Thank you for that pointer.  Changing the EvalType to "corners" produced a scalar min_spread_code, and placed its value in the "Nominal" column in the Results tab.  So far so good  I then assigned calcVal("min_spread_code" "test1") to a variable trim_code in a downstream test (let's say test2), and attempted to re-run the sweep using min_spread_code as the optimal trim code.  But sims always error out complaining that I'm passing "nil" to variable trim_code.  I'm hoping it's just a matter of syntax.  I also tried using calcVal("min_spread_code" "test1" ?cornerName "Nominal"), but to no avail.

    The only other thing I can think of is that both test1 and test2 rely on the variable trim_code, and somehow this creates a problem.  In test1, I use it in the corner setup as means to increment trim codes while sweeping temperature.  In test2 I want to assign the best trim code to it, and re-run the sweeps.  Perhaps I'm using the calcVal feature incorrectly?

    David

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