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Create a function to save time points of waveform_1 and save y-axis values of waveform_2 corresponding to these x-axis values.

Zaara

I wish to save rising edge's time points and save OUT waveform's have used these equations:

risíng_edges   = cross(v("/CLK_REF" ?result "tran") vdd*0.5 0 "rising" t "time")

OUT_val        = value(v("/OUT" ?result "tran") rising_edges ) 

cross function works fine but value function evaluates to nil, I have tried this expression as well: 
OUT_val        = value(v("/OUT" ?result "tran") xval(rising_edges) ) 

I followed previous posts on the topic and I receive an error: 
1)   Calculator function to measure the value of a waveform when another waveform crosses a threshold (cadence.com) abMakeWaveform() the second argument should be a list.. 
2)   convert a waveform to a list: SKILL: How to convert a waveform object into a list? (google.com) abWaveToList() gives me an error that waveform points be a complex number, I tried this function with real() inbuilt as well. 

  • Andrew Beckett

    The abCrossTwoWaves function you referred to in your first numbered point should do wha you want - I just re-checked it. What was the expression you had with abCrossTwoWaves which was giving the error you saw?

    The approaches you were trying otherwise won't work because the value() function doesn't accept multiple x-axis points (either as a list or as a waveform). That's why I wrote abCrossTwoWaves in the first place (of course, things could have changed in the meantime, but as far as I'm aware, value() still doesn't accept multiple x-points).

    Andrew

  • Zaara
    in reply to Andrew Beckett

    I checked again the syntax for abCrossTwoWaves and yes there was an error in my equation. I can now extract the required data. thank you!

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