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passing global variable to ADE output

Hi all,

in ADE assembler I defined a global variable named "active_port" which value is changing from corner to corner

The ADE test is made up by a DC+ SP simulation. In the ADE outputs I defined a bunch of equations as shown below.

Now, my wish would be to have the index of the equations to change according to the corner, like shown in the example here below, where instead of having the number "hard-coded" I enter the variable I desire.

When evaluating the equation I get an "eval err". I tried in several ways using "value", "leafValue" but so far it didn't workout.

So then I tried to evaluate the variable itself

and I see that the variable has some independent variable included (see green arrow below), which probably cause the trouble I have. I was looking for ways to just extract the scalar value being displayed, but I found no means to do it.

I hope the problem statement is clear. Any idea on how to fix it ?

thanks!
Tommaso

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ShawnLogan over 3 years ago

Dear Tommaso,

TommasoF said:
and I see that the variable has some independent variable included (see green arrow below), which probably cause the trouble I have.

1. Please indicate what the active_port expression you defined as an output appear as in your Results - not what is indicated in the ViVA plot. In a results tab in Assembler where I specify an expression as VAR("my_design_variable"), the value of "my_design_variable" for each corner is shown as detailed in Figure 1.

2. Do you get an error when you move your spm() expression to the Calculator and try to evaluate it (or simply use the expression editor)?

3. Have you tried defining a new output with the expression VAR("your_design_varable") and then use the name of this output as the argument to your spm() based expression?

Shawn

Figure 1
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FormerMember over 3 years ago in reply to ShawnLogan
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TommasoF over 3 years ago in reply to FormerMember

Hi Shawn,
I created a simple TB and here the result:

I tried also in the calculator, but it returns this result:

nevertheless, when I plot the value in the table, I do see that it is NOT an integer, whereas "spm" accept only "integers" (see error message above).
So the problem seem to be here.

Now, assuming I am on the right path, the next problem is that I don't manage to convert the number into an integer. "t5" gives an eval_error. I also tried to add the double quote as indicated, but it does not help. Also in the calculator does not work
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Saloni Chhabra over 3 years ago in reply to TommasoF

Hi,

I checked that an enhancement CCR is already in place for this request, but it isn't yet planned. As a workaround, can you try defining the function int around VAR("") e.g.

spm('sp 1 int(VAR("act")))

Regards,

Saloni
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TommasoF over 3 years ago in reply to Saloni Chhabra

great, thanks!
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TommasoF over 3 years ago in reply to TommasoF

interestingly enough, I restarted Virtuoso and the solution that was previously working, no longer works. I started Virtuoso over again, but it does not help.

so the formula is like suggested: spm('sp 1 int(VAR("act"))).
No error being displayed, but when I evaluate, I do not get the "Sxx_formula" plotted (see further below)

and no errors being displayed on the CIW.

but when I try to plot using the calculator I do get this error message:

Any idea of what could help here ?
thanks!
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TommasoF over 3 years ago in reply to TommasoF

Hello everybody,
any hint on the problem above ?
If I use the function "value" around this equation then it works, but of course it produces only a scalar. it seems to be a bug.
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Saloni Chhabra over 3 years ago in reply to TommasoF

Can you try descending into Explorer and check if the expressions plot?
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TommasoF over 3 years ago in reply to Saloni Chhabra

yes, in Explorer the plot works
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TommasoF over 3 years ago in reply to TommasoF

Is there any chance to get it run also in Assembler ?
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TommasoF over 3 years ago in reply to TommasoF

Is there any chance to get it run also in Assembler ?
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Andrew Beckett over 3 years ago in reply to TommasoF

TommasoF said:
Is there any chance to get it run also in Assembler ?

As Saloni mentioned before, there's an enhancement CCR to get this resolved. Please contact customer support and request that a duplicate is filed (I didn't check what the CCR number is).

Andrew
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TommasoF over 3 years ago in reply to Andrew Beckett

this has fixed the problem
https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000005cdBYEAY&pageName=ArticleContent
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