03-06-2017 03:04 PM
I'm trying to export IBIS for Virtex-5 out of plan ahead with just pin assigment. The plan ahead documentation mentions this feature avail for Virtex-7.
I don't see the option avail under File->Export. Do I need to synthesize a partial design to get that info or is it even avail for Virtex-5?
03-06-2017 08:14 PM
virtex5.ibs does not seem to exist under the location documented in this AR https://www.xilinx.com/support/answers/41685.html
you can navigate to the following location in the installation directory, PlanAhead\data\parts\xilinx\virtex5 to confirm the same.
03-06-2017 08:56 PM
@robert_ko I think the write_ibis is only from 7- series and above.
For Virtex-5, you will need to use the IBIS Writer in ISE
03-06-2017 09:25 PM
Download Virtex-5 IBIS models from here.
03-07-2017 08:23 AM
I had previously download that IBIS and forwarded to board developer but they complained the IO to IO skew was not there.
I relooked and could not even find package for XQR5VFX130 (CF1752). Is that release imcomplete?
03-07-2017 08:42 AM
Please use IBIS Writer i.e. create custom IBIS Model from ISE for the part you are using and you should get the IBIS model that includes the package details.
03-07-2017 09:00 AM
Follow the regular flow of Implementing the design in ISE. Once implemented, Expand the Place & Route tree to see the "Generate IBIS Model" option
With Generate IBIS Model selected, click on Process -> process properties to set the properties for the IBIS model
The generated IBIS model should have the details you looking for
03-07-2017 12:01 PM
if I have plan ahead ucf and top level verilog (i just have wrapper only), what CLI commands to I run to get NGC file that ibiswriter needs? Our current flow uses precision so I'd like to try to script it
03-08-2017 03:24 PM
I followed the instruction using netlist shell but IBISWRITER complains xqr5vfx130 (Rad hard Virtex-5) not supported?
Started : "Generate IBIS Model".
Command Line: ibiswriter -intstyle ise -truncate 20 fec1_top.ncd fec1_top.ibs
Loading device for application Rf_Device from file 'qr5vfx130.nph' in
"fec1_top" is an NCD, version 3.2, device xqr5vfx130, package cf1752, speed
ERROR:PostProcessors:26 - IBISWriter: qrvirtex5 is an unsupported architecture.
Use ibiswriter -h to list supported architectures.
Process "Generate IBIS Model" failed
04-03-2017 05:33 PM
Did anyone have better luck? I have encountered the same issue with ibiswriter. It looks like the overlay package never provide an updated binary to support qrvirtex5 architecture. I can only think of an alternative to cut/paste the exported pin info on a project compiled using commercial part into the supplied .ibs.