User guide

44 www.xilinx.com System Generator for DSP User Guide
UG640 (v 12.2) July 23, 2010
Chapter 1: Hardware Design Using System Generator
Hierarchical Controls
The Simulink System Period control (see the topic Simulink System Period above) on the
System Generator block is hierarchical. A hierarchical control on a System Generator block
applies to the portion of the design within the scope of the block, but can be overridden on
other System Generator blocks deeper in the design. For example, suppose Simulink
System Period is set in a System Generator block at the top of the design, but is changed in
a System Generator block within a subsystem S. Then that subsystem will have the second
period, but the rest of the design will use the period set in the top level.
Viewing ISE Reports
When the Compilation is finished, the Compilation status dialog box appears as shown
below. If your compilation target wasBitstream or Timing and Power Analysis, you can
click on the Show Reports button and the associated ISE Reports will be avilable for your
viewing:
Compilation Results
In topic discusses the low-level files System Generator produces when HDL Netlist is
selected on the System Generator block and Generate is clicked. The files consist of HDL,
NGC and EDIF that implement the design. In addition, System Generator produces
auxiliary files that simplify downstream processing, e.g., bringing the design into Project
Navigator, simulating using an HDL simulator, and synthesizing using various synthesis
tools. All files are written to the target directory specified on the System Generator block. If