User guide

System Generator for DSP User Guide www.xilinx.com 91
UG640 (v 12.2) July 23, 2010
Processing a System Generator Design with FPGA Physical Design Tools
Simulation using ModelSim within Project Navigator
Before you can launch ModelSim from Project Navigator you must specify the location of
your installed version of ModelSim. To do so, open Project Navigator and choose the main
menu Edit > Preferences. This brings up a dialog box. Choose the ISE General >
Integrated Tools category in the dialog box. Enter the full path to the version of ModelSim
on your PC in the Model Tech Simulator edit box. You must include the name of the
executable file in this field.
The Project Navigator project is already set up to run simulations at four different stages of
implementation. System Generator creates four different ModelSim .do files when the
Create Testbench option is selected on the System Generator block. The ModelSim do files
created by System Generator are:
• pn_behavioral.do - for a behavioral (HDL) simulation on the HDL files in the
project, before any synthesis or implementation.
• pn_posttranslate.do - this file runs a simulation on the output of the Xilinx
translation (ngdbuild) step, the first step of implementation.
• pn_postmap.do - to run a simulation after your design has been mapped. This file
also includes a back-annotated simulation on the post-mapped design.
• pn_postpar.do - to run a simulation after your design has been placed and routed.
This file also includes a back-annotated simulation step.