====== Running simulations using OCEAN ======

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== Contents ==

   * Introduction 
   * Reference documentation
   * ...
   * ...

**Keywords:**

[[http://www.slideshare.net/michaelgod/writing-cadence-ocean-scripts]]

[[http://www.es.isy.liu.se/courses/PhD_courses/techdoc/download/Ocean_demo_ek.pdf]]

[[https://www.eleceng.adelaide.edu.au/personal/dabbott/wiki/images/8/8c/OCEAN_Mostafa_Rahimi_Adelaide.pdf]]




Cadence training references:

[[http://www.cadence.com/training/eu/pages/coursedetails.aspx?courseid=ES_84454_IC.6.1.3]]


YouTube:

[[http://www.youtube.com/watch?v=6hrfdK3bP-Y]]

===== Introduction =====

[[http://venividiwiki.ee.virginia.edu/mediawiki/index.php/ToolsCadenceSimulationOCEAN]]

Fondamentale perche' e' la sintassi del Calculator!

youtube video [[ http://www.youtube.com/watch?v=6hrfdK3bP-Y | here ]]


Starting point? Beh, registrare una macro da ADE!

**ADE L => Session => Save Ocean Script...**  con estensione **.ocn**


Poi lo script puo' essere eseguito dalla **command line** della CIW !

<code>
load("oceanScript.ocn")
</code>


Tutta la documentazione si trova in 


''<sub>/usr/cadence/IC_6.1.5/doc/oceanref/oceanref.pdf</sub>''


mentre esempi di codice sono in 

''<sub>/usr/cadence/IC_6.1.5/tools/dfII/samples/artist/OCEAN</sub>''



<code>
cd ~/cadence/tutorials
mkdir src
cd src
ln -s /usr/cadence/IC_6.1.5/tools/dfII/samples/artist/OCEAN ocean_samples  
</code>

the README file gives a brief description of the directory contents

Wiki tutorial [[ https://secure.engr.oregonstate.edu/wiki/ams/index.php/Cadence/WritingCadenceOCEANScripts | here ]]


<code>
ocean [-nograph]
...
...
ocean>    => OCEAN prompt
</code>



<code>
ocean> ocnHelp()
</code>

<code>
ocean> ocnHelp( "<command>" )
</code>


e.g.

<code>
ocean> ocnHelp( "tran" )

PROTOTYPE       tran( g_fromValue g_toValue g_byValue ) =>
                g_byValue/nil

                tran( g_toValue)=> undefined/nil


DESCRIPTION     Specifies a transient analysis with limited
                options. If other analysis options are needed, use the
                analysis command.
NOTE            The second instance of the tran command is valid 
                only with the Spectre®  circuit simulator 


EXAMPLE(S)
                tran( 1u)

                Specifies a transient analysis to 1u for the Spectre® 
                Circuit Simulator

                tran( 0 1u 1n ) => 1e-09

t
ocean>
</code>





[[http://homerreid.dyndns.org/misc/ocean/index.shtml]]  (fatto molto bene!)

[[https://www.eleceng.adelaide.edu.au/personal/dabbott/wiki/images/d/d5/OCEAN_Tutorial_Rahimi.pdf]]

[[http://venividiwiki.ee.virginia.edu/mediawiki/index.php/ToolsCadenceSimulationOCEAN]]

[[http://blog.intgckts.com/cadence-ocean-scripting/]]

[[https://secure.engr.oregonstate.edu/wiki/ams/index.php/Cadence/WritingCadenceOCEANScripts]]


Sample OCEAN macros comes with Cadence IC itself under

''$IC_DIR/tools/dfII/samples/artist/OCEAN''


====== Simulation setup ======

:!: //**Note**//

''netlist'' ''netlistHeader'' and ''netlistFooter'' files are mandatory!!!

[[https://groups.google.com/forum/#!topic/comp.cad.cadence/HzcvLFQALoY]]

<code>
ocean> simulator('spectre)
</code>

<code>
ocean> design("/path/to/spectre/main/netlist")
</code>

<code>
ocean> resultsDir("/where/you/want/to/put/results/")
</code>

<code>
modelFile("/path/to/model/file")
</code>

<code>
modelFile(
   '("/path/to/model/file" "section")
   '("/path/to/model/file" "section")
   ...
   ...
   )
</code>

====== Design variables ======

<code>
desVar( "varName" value )
</code>


<code>
desVar( "varName1" value1 "varName2" value2 ... )
</code>

or

<code>
varName( "varName1" value1 )
varName( "varName2" value2 )
...
</code>


====== Analyses ======

<code>
analysis('type ?option1 value1 ?option2 value2 ...)
</code>


<code>
analysis('tran ?start 0 ?stop 10u ?step 10n)
</code>



====== Parametric analysis ======

Don't use the run() command! Use paramRun() !!!

====== Process corners simulations ======

[[http://venividiwiki.ee.virginia.edu/mediawiki/index.php/ToolsSpectreSimOceanCorners]]



Sample scripts:

''$IC_DIR/tools/dfII/samples/artist/OCEAN/corners/''


====== Monte Carlo simulations ======

[[http://venividiwiki.ee.virginia.edu/mediawiki/index.php/ToolsSpectreSimOceanMonteCarlo]]

[[http://www.cadence.com/Community/forums/p/13613/21552.aspx]]



Sample scripts:

''$IC_DIR/tools/dfII/samples/artist/OCEAN/monteCarlo/''

====== ======
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Last update: [[pacher@NOSPAMto.infn.it |Luca Pacher]] - Aug 20, 2013
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