Error within ocean-script

[Frank Nitsche]

Hi everybody,

I wrote an ocean-script to perform some parametric calculations. Within
this script I use the following expressions:

if(( cornerType == "ws" ) outp = outfile("./results.log"))
if(( cornerType == "ws" ) ocnPrint( ?output outp ?width 11 ?numSpaces 1
"corner" "r_length" "cf" "ccomp" "rvalue" "BW" "Noise" "Overshot"
"Target" ))

ocnPrint( ?output outp ?width 11 ?numSpaces 1 cornerType evalstring(
desVar("r_length")) evalstring( desVar("cf")) evalstring(
desVar("ccomp")) r b n ue zf )

close(outp)

The variable cornerType is set to "ws" at the beginning within a
foreach-loop. Tha expressions above are all within this loop. The
close(outp) is out of the loop.

When I start this script with ocean it works fine. The file results.log
is opened, the results from each run of the loop are wirtten to the file
and the file is closed.

When I call ocean from within a C program using the following
expressions ( an .oceanrc with the file name of the script is existing):

sprintf(h_txt, "ocean -nograph\n");
system(h_txt);

it returns the following error messages

> *Error* eval: unbound variable - outp
> *Error* (Default-reader-method) generic:famGetUserPath class:list

What's wrong?

The call from within the C program works if I don't use the output
expressions above.

--
Best regards

Frank.

F. Nitsche
Technical Manager Chipdesign
MAZeT GmbH

[Andrew Beckett]

Without seeing the whole example, I can't be sure.

However, one thing that doesn't look right - there shouldn't be a "\n" in your
sprintf in the C program - since the command shouldn't have a carriage return at the
end of it. I can't quite see why that would have the problems you're seeing, but it's
worth a try.

I assume that when you try it normally you just do "ocean -nograph" too?

Andrew.

--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd

[S. Badel]

just had a look on sourcelink.
there's a solution on this issue (#11110574)
here's what it says:

This occurs only in the case when a simulation has not been run before using
ocnPrint. This
is because ocnPrint requires that the path to resultDir should be set. The
path to resultDir
is set by default if the simulation is run, or this can be set using
openResults function.

To overcome this problem use the openResults function to set the path to a
valid PSF directory.

stephane

"Frank Nitsche" <nit...@MAZeT.de> wrote in message
news:3FA76F23...@MAZeT.de...

[Frank Nitsche]

Thanks,

it seems to be the solution. I made some experiments in the last days
regarding this point and came to the same result.
It's important to have a results directory with valid psf data.

It works also without running a simulation within the script, but I must
have run a simulation anytimes before to have valid psf data. I only
have to select a simulator, a results directory with valid psf data and
openResults(resultsDir()). This has to be done also when I only use
internal variables ( which would no require any simulation).
The example looks like this (xxx.inc contains desVar expressions e.g.
for the variable "laenge"):

simulator('spectre)
resultsDir("./res")
load("xxx.inc")
openResults(resultsDir())
selectResults('variables)
outp = outfile( "xxx.log" )
laenge = evalstring( desVar("laenge"))
d = (laenge+2.0)*(laenge+2.0)
ocnPrint( ?output "xxx.log" d )
close(outp)
ocnPrint(?output "ocean_out" d)
exit

This example works with ocean, ocean -nograph and also with the system
call from within a C program.

I've also seen the print expression in ocean which can also print to a
port. What's the difference between ocnPrint and print ? Using ocnPrint
I can place format informations within the expression. Is this the only
difference?

Best regards

Frank.

S. Badel schrieb:

--
Mit freundlichen Grüßen

=========================================================
Dr. Frank Nitsche
Technischer Leiter Chipdesign

MAZeT GmbH Email: mailto:nit...@MAZeT.de
Göschwitzer Str. 32 Tel : (3641) 2809 0
D-07745 Jena Fax : (3641) 2809 12

Besuchen Sie bitte unsere Web-Seiten: http://www.MAZeT.de
=========================================================

[Andrew Beckett]

printf() is the low level SKILL function (based on the C printf function). It can deal
with printing individual values (although it does handle lists).

ocnPrint is a higher level function - geared up more for dealing with waveform
objects and so on. You can control the precision and formatting to some extent, but
whilst more convenient than printf for waveform objects, it is less flexible overall.
(note, you can print a waveform object directly with a single call to printf).

Andrew.

--