Adexl - dynamically stop transient run on event trigger

You're lucky that I responded to this given that the MDL script is in Comic Sans. That's a cardinal sin (I probably should state that in the forum guidelines!). Just kidding...

If you read the documentation (Spectre Circuit Simulator Measurement Description Language Reference), in the section on autostop, it says:

Only functions that determine specific events, such as delay and event measurements, can cause an automatic stop.

Well, your rise2=rise1+10e-6 is not going to create an event. It's just an addition. Even if it did create an event, it's adding 10u to the rise time, not the time at which the rise time was measured. You also didn't declare rise1 in your MDL code either. I think you want something like this:

alias measurement tran_autostop
 {
    export real rise1
    real tcross
    real clkDel

    run tran
    rise1=risetime(sig=V(clk_en), initval=0, inittype='y, finalval=1.8, finaltype='y, theta1=10, theta2=90)
    // find the time at which the risetime was measured - 90% of the finalval
    tcross=cross(sig=V(clk_en), dir='rise, thresh=0.9*1.8)
    // measure something 10us later
    clkDel=V(clk_en)@(tcross+10u)
  }

run tran_autostop

This will run for 10us beyond the point at which the rise time was measured (I tested it). The @ is an event operator, and is measuring the clk_en signal 10u after the time of the crossing.

Regards,

Andrew

Thanks Andrew. It's working. My first mistake was adding 10u to risetime to stop simualtion. That's not correct. tcross is correct one. Operator @ really helped me. Sorry about font, I will stick to default one.

Thanks Andrew. It's working. My first mistake was adding 10u to risetime to stop simualtion. That's not correct. tcross is correct one. Operator @ really helped me. Sorry about font, I will stick to default one.