Xilinx ISE 8.2i service pack 3
ModelSim XE III 6.1e
VHDL system

When I build a block ram using CoreGen in Xilinx ISE it produces the VHDL 
file and the Verilog file.
When ModelSim sees the verilog file it grabs it and trys to use it but then 
errors out saying this version of ModelSim does not support a mixed design 
of both VHDL and Verilog.  If I go in and delete the Verilog files 
everything works fine.  This did not happen until I recently updated my 
software (both Xilinx ISE and ModelSim).

Anyone else run into this problem and maybe have a fix for it?

Thanks

Dan 

Dan K schrieb:
> Xilinx ISE 8.2i service pack 3
> ModelSim XE III 6.1e
> VHDL system
> 
> When I build a block ram using CoreGen in Xilinx ISE it produces the VHDL 
> file and the Verilog file.
> When ModelSim sees the verilog file it grabs it and trys to use it but then 
> errors out saying this version of ModelSim does not support a mixed design 
> of both VHDL and Verilog.  If I go in and delete the Verilog files 
> everything works fine.  This did not happen until I recently updated my 
> software (both Xilinx ISE and ModelSim).
> 
> Anyone else run into this problem and maybe have a fix for it?
> 
> Thanks
> 
> Dan 
> 
> 
> 
Hi Dan,
Modelsim itself is blind and neither sees files nor grabs them without 
being told to do so. :-)
You are probably starting Modelsim from the ISE Project Navigator.
PN creates a script for Modelsim (*.fdo). This script tells Modelsim 
which files to compile and what else shall be done.
The real problem is that good old bilangual ISE favors verilog when 
converting or searching for files. Try to create a schematic and 
simulate it. Guess what, it will be converted to a verilog *.vf file. 
Really great, when you are doing VHDL-Designs and your unilingual 
Modelsim XE is installed with VHDL.

This behavior of ISE PN is a mayor annoyance for VHDL designers.
For schematics the workaround is to set the "View HDL..." properties to 
VHDL.
For coregen you found out to delete the verilog files, but if I remember 
it correctly, there may also be a property that can be set to avoid the 
use of the verilog files.

ISE PN should have a global project property where designers can chose 
between VHDL, verilog and bilangula flows. And this property should be 
stored like the other global settings like the chip and the prefered 
simulator etc.

Have a nice simulation
   Eilert

Hi DAn,

You need a "midex mode" license for ModelSim if you want to simulate
verilog and vhdl code at the same time. This license is not included in
your Modelsim XE Xilinx Edition.
If you dt want to purchase an apropiate Modelsim Version (10k=80) you
have to decide which language you wanna use.

Bye Helmut


Dan K wrote:
> Xilinx ISE 8.2i service pack 3
> ModelSim XE III 6.1e
> VHDL system
>
> When I build a block ram using CoreGen in Xilinx ISE it produces the VHDL
> file and the Verilog file.
> When ModelSim sees the verilog file it grabs it and trys to use it but th=
en
> errors out saying this version of ModelSim does not support a mixed design
> of both VHDL and Verilog.  If I go in and delete the Verilog files
> everything works fine.  This did not happen until I recently updated my
> software (both Xilinx ISE and ModelSim).
>
> Anyone else run into this problem and maybe have a fix for it?
>=20
> Thanks
>=20
> Dan