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

  • From: Mike Steinberger <msteinb@xxxxxxxxxx>
  • To: huangchunxing@xxxxxxxxxx
  • Date: Wed, 02 Jan 2008 08:01:50 -0600

Title: Presentations for the Dec. 4 and Dec. 11 meetings available...
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
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