User guide

System Generator for DSP User Guide www.xilinx.com 355
UG640 (v 12.2) July 23, 2010
Black Box Examples
- External co-simulator - When the mode is External co-simulator, it is
necessary to add a ModelSim HDL co-simulation block to the design, and to
specify the name of the ModelSim block in the field labeled HDL co-
simulator to use. In this mode, the black box is simulated using HDL co-
simulation.
♦ FPGA Area Estimation - The numbers entered in this field are estimates of how
much of the FPGA is used by the HDL for the black box. These numbers must be
entered by hand. The numbers are only needed if you would like to use the
resource estimating utilities supplied with System Generator. For more
information, see Resource Estimation.
To continue the tutorial, leave the parameters set as they currently are.
7. Wire the black box's ports to the corresponding subsystem ports.
8. Run the simulation by clicking the Simulation Play button and then double click on the
scope block. Notice the black box output shown in the Output Signal scope is zero.
This is expected as the black box is configured to be inactive during simulation.