export ADE output expressions to CSV

Dear yeh1,

yeh1 said:

Is there a way to print the ADE output expressions to a CSV file, when some of the expressions fail to evaluate in ocean/skill, without using Assembler?

I am afraid I am not sure I understand the context of your basic question, but can certainly answer your question 1. Specifically, it sounds as if you have an ocean/SKILL script that you are running and it has some expressions that are not evaluating correctly. However, you want to print the expressions to a comma-separated variable file. It seems to me as if the expressions must be in the ocean/SKILL script you have - so why do you need to print them to a new file?

In any case, let me answer your question:

yeh1 said:

1. Is there some error handling option in ocean, to continue if the result is nil?

The error handling in ocean can be rather difficult to decipher. Hence, from my perspective, I have defined SKILL/ocean procedures to provide added error checking and report any potential errors in a manner that is easier to understand and allows a quick correction. As an example, the ocean function getData() can be used to access waveforms from a spectre results directory. However, if a desired output is not found in the data base, getData() provides only a nil condition with no information about the waveform it cannot locate. Hence, I defined procedure as shown below called "getWave()" that provides a more detailed output indicating which net name it cannot find.

I use similar functions for other ocean expressions that provide little information to assist in debugging. As a further example, I often use the if() content where the argument is the ocean function name. When it evaluates to nil, I include a printf() statement in the if() expression where the printf() provides a more meaningful bit of text indicating the nature of the ocean funciton that produces a "nil".

Does these examples help at all? In short, it is really up to you to add error checking to facilitate debugging ADE or ocean expressions.

yeh1 said:

3. Or better, is there some way to import a psf results dir run from plain Spectre into Assembler/Explorer just to print out a CSV of the output expressions?

I am not aware of a way to import the psf results from a single simulation to Assembler/Explorer without updated the psf of the main Assembler/Explorer database so it is aware of the added data. There may be a way, but I have not found a means to do this in my experience.

Shawn

Sample error checking ocean() procedure getWave() for standard ocean function getData()

include statement added to ocean script to load function getWave(): load("/home/smlogan/ocean_files/getWave.il")

---------------------------------------------------------------------------------------------------------------------------
; Waveform loading routine

procedure( getWave( signal_name ana_type results_directory)

let( list(my_wave)

; Loads a waveform from a database, but adds error checking in case waveform is not in database

my_wave = getData( signal_name ?result ana_type ?resultsDir results_directory)

if( my_wave then
   my_wave = my_wave
else
   printf("Error! Did not find waveform \"%s\" from results directory:\n%s\n" signal_name results_directory)
)

)
)

Example of use of if() function to detect an error in freq() ocean function where assigns error value "err_val" (numeric constant I define) to variable modout_p_freq in lieu of creating "nil" and exiting ocean

modout_p_freq = if(freq(modout_p "rising" ?xName "time" ?mode "user" ?threshold vth) frequency(clip(modout_p cross(modout_p vth num_cycles "rising" nil nil nil) cross(modout_p vth -2 "rising" nil nil nil)))/1e+09 err_val)

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Thanks, using the if() function is helpful.