How to evaluate the variable in a maestro measurement expression and not treat it as a literal string

Dear Genus,

I believe I understand your question. You are unable to use a variable name as. a signal and have it be evaluated in an Assembler/Explorer expression.

When I examined the expression, one item that came to mind immediately is that the syntax you appear to be using to access the signal name as a variable does not appear correct to me. The first argument of the VT() function is a string with the net name of interest. Hence it is not expecting a variable.

What I do, which appears to work, is define a variable as a wave and then I am able to use that  variable in a more complex expression. For example, using your expressions:

name = VT("/net_read") -- name is the variable and is defined as a wave by the VT() function.  

then, in your expression:

average(name)

When you used the variable name in your expression, it is interpreted as a string. Did I understand your question correctly? I hope so...

Shawn

Hi Shawn,

Thanks for the response, you got the question.

When I used the variable name in your expression, it is interpreted as a string but I don't want this behavior, I want the content to be interpreted not the variable name.

I modified it just as you recommended and it is still not evaluating the variable, rather I get this error "*Error* _averageMethod: can't handle _averageMethod(nil)".

Maybe I missed this part "define a variable as a wave ".

How can I define it as a wave?

Sorry for the confusion, I meant "When I used the variable name in my expression"

I assume (if I've understood you correctly) you want in your SKILL code to do this:

maeAddOutput(strcat("read" "avg") title ?outputType "point" ?expr lsprintf("average(VT(\"/%s\"))" name))

In other words, you'd have to use normal string manipulation functions to build the expression. BTW, lsprintf is essentially the same as doing sprintf(nil ...) 

Andrew.

Thank you very much, this is exactly what I was looking for.

Hey Andrew, I think you should take over the cadence customer service because I contacted customer service and the rep told me this is not possible with skill that i have to use the signal name directly.

To give my colleagues in customer support the benefit of the doubt, it may just have been that your question was not that clear. Given that Shawn also didn't get what you meant, and I had to guess, I suspect my colleagues also misinterpreted your question. Thanks for the feedback though (even though it's not really a scalable option!)

Andrew