uses a backplane called
to hook the
tools together to simulate designs which contain both VHDL components and regular Mentor Graphics (
) components. Within
, you can use the
GUI to manipulate (trace, force, etc.) signals in the
portion of the design, and the
GUI to manipulate signals in the VHDL portion of the design. However, you can also use the
GUI to manipulate signals in the VHDL portion of the design as well, so it is easiest to simply do it there.
4.2 Make the
window active by clicking on its top edge, and open the schematic sheet. Use the
menu item to select all of the nets in the design and use the
item to trace the signals. Use the
menu item to unselect the signals.
4.3 To simply illustrate how signals can also be traced in the
GUI, use the
menu item to bring the
menu to the top menu bar of the
Next use the menu item and
box ONLY around the and2 component so that its pins are selected. Then use the
menu time to bring up the
Add HDL Waves
dialog box. Make sure that the
button is selected and click
. Notice how a
wave window appears with the
signals (the inputs and output of the
VHDL component) in it.
4.3 Unselect all of the pins in the schematic and select the
input and force the following values on it: 0 at 0 ns, 1 at 160 ns, and 0 at 200 ns. Force the
input to 0 at 0 ns, and 1 at 160 ns. Force the
input to 0 at 0 ns, 1 at 80 ns, and 0 at 100 ns. Run the simulation for 240 ns. The result should be a display like the one below (with the
Wave window on top).