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Can anybody tell me how to interface Spectre (ADE) output (like waveform) to MATLAB for further processing
Search in the MMSIM documentation (cdnshelp) for "Matlab Toolbox". It's in the Virtuoso Spectre Circuit Simulator RF Theory manual.
Also there are app notes in <MMSIMinstDir>/tools/spectre/examples/SpectreRF_workshop/ which explain how to use this.
In reply to Andrew Beckett:
In reply to RFQuery:
I went through the documents.
But I am NOT able to configure the MATLAB tool-box.
MATLAB is unable to recognise the Spectre-Matlab ToolBOX command.
Can you please tell me what I should to do.
Which version of MMSIM (spectre -W) are you using, and which version of Matlab? Which platform are you running on?
In my case, I ensure that I have spectre in my path, and do this (for csh; for bash you'd use "export MATLABPATH=...")
setenv MATLABPATH `cds_root spectre`/tools/spectre/matlab/64bitsetenv LD_LIBRARY_PATH `cds_root spectre`/tools/dfII/lib:`cds_root spectre`/tools/lib/64bit:$LD_LIBRARY_PATH
I'm running a 64-bit Linux OS, and running 64 bit Matlab, so as you can see I've ensured that I'm pointing at the 64 bit versions of the shared libraries.
That's all I need to do.
Note that there was a problem in the early MMSIM10.1 versions (it was fixed in MMSIM10.1 ISR5) where there was a compiler incompatibility as described in solution 11699006
Thanks for your reply.
I did spectre -W
MATLAB Version we are using 7.12.0
In my "cadence.cshrc" file the following is :-
setenv INSTALL_DIR /home/....../srv/install
setenv CADENCE_DIR $INSTALL_DIR/cadence
setenv MMSIM $CADENCE_DIR/mmsim10
setenv CDS_INST_DIR $CADENCE_DIR/IC5141
set LD_LIBRARY_PATH=($CDS_INST_DIR/tools/lib $LD_LIBRARY_PATH)
setenv MATLABPATH /home/....../srv/install/cadence/mmsim10/tools/spectre/matlab
setenv SPECTRE_FEATURE_FILE $MMSIM/tools/spectre/etc/files/spectre.dat
set path=($MMSIM/tools/spectre/bin $path)
The issue I suspect is that MATLAB is not recognising the spectre commands like 'cds_srr' ..etc.
So how matlab can know about spectre. ?
I am confused...
Is there anything more to be added to the above .cshrc file ?
We are using 32-bit paltform
The error I am getting while 'cds_srr' command in MATLAB window is:-
??? Invalid MEX-file '/home/manas/Cadence_install/srv/install/cadence/mmsim10/tools/spectre/matlab/cds_innersrr.mexglx': libvirtuos_sh.so: cannot openshared object file: No such file or directoryError in ==> cds_srr at 16 sig = cds_innersrr(dirname);
That version (MMSIM10.1 Update release) is older than ISR5, and MMSIM10.1 versions prior to ISR5 had the problem you describe, due to the fact that the matlab toolbox was built using the Cadence supported compiler version, which was unfortunately incompatible with the supported compiler version for Matlab.
So you need to use a newer hotfix of the MMSIM10.1 release (or MMSIM11.1). From doing some tests, the newer toolbox no longer requires LD_LIBRARY_PATH to be set to the <MMSIM>/tools/lib dir - because it doesn't use those shared libraries (they would also have compiler incompatibility) - it doesn't do any harm if it's set, but it isn't required.
It did work with MMSIM11.1.
But the RF workshop documents you have referred is all baout RF plot .
But in my case I did simple ac analysis. and I want to plot some ac signal in MATLAB.
When I did signals = cds_srr(resdir,'ac-ac') in matlab, most of the AC signals are not being shown.
When I did :-
cds_plotsig(V4:p, '', '', db20)??? Undefined function or variable 'V4'.
Can you tell me or refer to some document which actually gives some example for plotting/processing AC signals..
The <MMSIMinstDir>/tools/spectre/examples/SpectreRF_workshop/MatlabAN.pdf is less RF-centric (the toolbox was developed by the SpectreRF team, hence the RF focus of many of the examples).
To access AC results, you can do this:
% access the info about all the signals in the resultssignals=cds_srr(resdir,'ac-ac')% show the Voltage signal namessignals.V% show the Current signal namessignals.I% get the V4:p signalV4_p=cds_srr(resdir,'ac-ac','V4:p')% look at the detailsV4_p.IV4_p.freq% plot the signalcds_plotsig(V4_p,'','freq','db20')
I suspect that when you did the signals=cds_srr(...) it did list all the signals, but note that you probably got a horizontal scrollbar and may not have seen then all. However, looking at signals.I and signals.V should show everything. You certainly should see the same signals that you'd see in the results browser in ADE - and if they're missing there it would be because you didn't save the signals from the simulator.
Note that you could also plot the waveform directly yourself using:
this is the equivalent of using 'mag' instead of 'db20' in the cds_plotsig, except it doesn't label the axes and so on.
Hope that helps!
Thanks a lot Andrew.
Your suspicion is absolutely right. ;)
I realized that after ( also after putting the above question on the Post) doing some more investigation into the issue.
But one more problem now I am running into is the ADE simulation is little bit slower after the upgradation.
In the output log it is printing more lines and in that process simulation is getting slower..
I have not changed the ADE settings or anything that short after the upgradation
If the simulation is running slower, you should contact customer support. Hard to figure out why without seeing the details.
We highly appreciate your help and patience.
We will be contacting the customer support.
Also I have attached the output log files. If you can have a look at it it will be really helpful and fasten the process.
spectre_after.out:- LOG FILE AFTER INSTALLING HOTFIX for MMSIM10.1
spectre_before.out:- LOG FILE BEFORE INSTALLING HOTFIX for MMSIM10.1
The ADE setting is kept same in the above two cases.
The log file after installing the HOtFix is attached