[ibis-macro] Re: IBIS AMI model inter-operability

  • From: Huang chunxing <huangchunxing@xxxxxxxxxx>
  • To: Mike Steinberger <msteinb@xxxxxxxxxx>
  • Date: Thu, 03 Jan 2008 14:58:38 +0800

Presentations for the Dec. 4 and Dec. 11 meetings available...Mike,

Thanks for your information.

My initial purpose to take this problem out is to remind all of us the robust 
problem
behind AMI model.

I think whether model is robust is paramount. Similar problems may happen again
and again. AMI model is something like programming. If the maker is short of 
enough
skills, he may leave some bugs in the AMI model. And if the AMI model haven't 
been
tested thoroughly, these bugs will become bombs for users.
Then, some "blames" may come from users again, ...... 

That's why I do believe that robust is top important for AMI model.


Regards,
Huang
HUAWEI TECHNOLOGIES CO.,LTD.  


Address: Huawei Industrial Base
Bantian Longgang
Shenzhen 518129, P.R.China
Tel: +86 755 28976426 
Fax: +86 755 28976758
E-mail: huangchunxing@xxxxxxxxxx
www.huawei.com
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  ----- Original Message ----- 
  From: Mike Steinberger 
  To: huangchunxing@xxxxxxxxxx 
  Cc: ibis-macro@xxxxxxxxxxxxx 
  Sent: Wednesday, January 02, 2008 10:01 PM
  Subject: Re: [ibis-macro] IBIS AMI model inter-operability


  Huang-

  Cadence and SiSoft worked together to find and fix that bug; however, we 
hadn't alerted the rest of the community yet because I wanted to finish my 
testing. My apologies. I'll finish that testing and we'll get a new version out.

  Mike S.

  Huang chunxing wrote: 
    Hi IBIS Experts,

    When I am trying to simulate IBIS_AMI_RX model with IBIS_AMI_test.exe from 
Sisoft,
    IBIS_AMI_test simulator break down. 
    This is my run_eq_noeq.bat which I only chage the IBIS_AMI_tx.dll to 
IBIS_AMI_rx.dll
    in order to call AMI RX model from candence.
    Here I don't care about data validity, but want to check AMI model 
inter-operability.
    **********************************************************************
    call cleanup.bat
    cls
    type ..\version.txt
    copy tx_impulse_no_eq.csv tx_impulse.csv

    IBIS_AMI_prbs.exe -f tx_impulse.csv | ^
    IBIS_AMI_test.exe -f IBIS_AMI_rx.dll -i tx_impulse.csv -g -c > 
waveform_rx_pad.csv
    rename tx_impulse_out.csv impulse_rx_pad.csv
    **********************************************************************

    I checked and debugged the IBIS_AMI_rx.c source file, and finally found 
that the problem is
    from that  AMI_INIT function in IBIS_AMI_RX didn't return any pointer, 
AMI_parameters_out.
    After I gave some value to AMI_parameters_out and recompiled it, everything 
is ok.
    **********************************************************************
      *AMI_dll_memory_handle = ctf;
     
      *AMI_dll_parameters_out = AMI_dll_parameters_in;  // <<<add this statement
      
      printf(" AMI_INIT FINISHED\n");
      return 1;
    **********************************************************************
    I browse the IBIS BIRD104.1 and AMI_parameters_out is required and no 
optional.
    Even with that AMI_parameters_out is required in IBIS BIRD, such parameter 
may be ommited by
    modeler carelessly. I think IBIS AMI model may also have the model quality 
problem. 
    Then under such condition, how to avoid simulator break down is an issue 
for EDA vendors.

    If I made some mistake here, please kindly correct me. 
    Thanks and Happy New Year to Everyone!

    Regards,
    Huang
    HUAWEI TECHNOLOGIES CO.,LTD.  

    Address: Huawei Industrial Base
    Bantian Longgang
    Shenzhen 518129, P.R.China
    Tel: +86 755 28976426 
    Fax: +86 755 28976758
    E-mail: huangchunxing@xxxxxxxxxx
    www.huawei.com
    
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HUAWEI, which 
    is intended only for the person or entity whose address is listed above. 
Any use of the 
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total or partial 
    disclosure, reproduction, or dissemination) by persons other than the 
intended 
    recipient(s) is prohibited. If you receive this e-mail in error, please 
notify the sender by 
    phone or email immediately and delete it!

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