Calculator -> Using 'value' in equation

This works for me. I used IC616 ISR14 (6.1.6.500.14).

I can't see anything obviously wrong here. Try customer support?

Regards,

Andrew.

Hello Andrew,

Thanks for your prompt reply.

I just noticed that CIW reported the error as shown below:

expression evaluation failed: val is not legal.
expression evaluation failed: value(v("out" ?result "mc1_tran-tran") 0.5u ?period 1u ?xName "time" )
"(\"error\" 0 t nil (\"*Error* drfGetWaveformXVec (DRL-18): argument not a valid srr waveform interface object nil\"))"

Attached is the psf for the output signal. Could you try?

Thanks

Syafiq

out.tar.gz

Syafiq,

Given that  you appear to have exported a single trace to psf, the result name is no longer called "mc1_tran-tran" and the signal is no longer called "out". I was able to do this with the data you sent:

openResults("output.psf")
plot(value(v("out (mcparamset=1\\.00e+00)" ?result "tran") 0.5u ?period 1u ?xName "time" ))

and it worked perfectly.

Regards,

Andrew.

Hello Andrew,

It is weird, it does not work for me.

And now, I am trying another option of extracting the values by using OCEAN command.

I run 100 montecarlo points. So the script below will go into every psf directory, read the voltage value at 0.5u and convert it into binary 0 or 1.

It should generate 100 voltage values. However, only once all 100 values get extracted. When I rerun the script, the value which gets extracted is less than 100 (range from 93 to 96)

I really don't have any idea about this. The VIVA GUI is open when I was running below script. And I can see through VIVA GUI, the moment I running the script, every montecarlo directory (from 1 to 100) is loaded and read. But in the output file, not all 100 values get extracted.

Do you see anything wrong with my script? Thanks

val=0
for(val 1 100
openResults( sprintf( nil "/tmp/msm1g14/Arbiter_16/hind.ecs.soton.ac.uk_msm1g14_153529920/MonteCarlo.0/%d/Arbiter_PUF-Arbiter_16-1/" val))
out = outfile("./response_nominal.dat" "a")                                       ;name the output file and open it for write access
results()                                                                                                    ; open up the results
selectResults(`tran)                                                                               ; Select the transient results
outputs()                                                                                                   ; View the outputs
if((value(v("/out"),0.5u)>1.65) fprintf(out "1\n") fprintf(out "0\n"))
)
close(out)

I'd never do it that way - I'd use the family data instead so you could get all 100 values at the same time. However, if something isn't working, maybe you have a broken version? Perhaps you could take this up with your support channel (I guess Europractice, since you appear to be from Southampton University). If they can't solve it, they'll contact us.

Your code appears to have the close() outside of the for loop - so you keep opening new file handles for each entry in the loop, and then close only one of them outside. I suggest moving the outfile() call to before the for loop. Maybe that's why it fails on subsequent attempts?

Regards,

Andrew.

Hello,

yes, you are right. I would normally and prefer to use family data. that way you can get all 100 values at the same time. 

I will file a report of non-working value expression to europractice.

anyway, thanks for your suggestion. it is worked perfectly. And now I got all 100 values start at 0.5us and every 1us.

Here is the working code for the benefit of others who may come across the same issue.

val=0
time_scale=1u
time_start=0.5

out = outfile("./response_nominal.dat" "a") ; name the output file and open it for write access

for(val 1 100
openResults( sprintf( nil "/tmp/msm1g14/Arbiter_16/hind.ecs.soton.ac.uk_msm1g14_153529920/MonteCarlo.0/%d/Arbiter_PUF-Arbiter_16-1/psf" val))
results()                                           ; open up the results
selectResults(`tran)                      ; Select the transient results
outputs()                                          ; View the outputs

for(time_inc 1 32
time=(time_inc-time_start)*time_scale
if((value(v("/out"),time)>1.65) fprintf(out "1") fprintf(out "0"))
)
fprintf(out "\n")
)
close(out)

Thanks Andrew for your time and effort. I really appreciate that.

Thanks

Syafiq