Answers Database
F1.4, F1.5 Simulation: How to create an LED (7 seg) drawing on the schematic that lights during simulation.
Record #4092
Product Family: Software
Product Line: Aldec
Product Part: Foundation Logic Simulator
Product Version: 1.4
Problem Title:
F1.4, F1.5 Simulation: How to create an LED (7 seg) drawing on the schematic that lights
during simulation.
Problem Description:
Urgency: Standard
General Description:
When doing a simulation for a design that drives a 7 segment LED (or any LED), how
can the LED be graphically represented?
Solution 1:
To graphically present the states of the LEDs, lines can be drawn in the schematic
editor and net names linked to the lines, then when probes are placed on the net
names, the probes will display the associated state of each LED bit.
Steps:
1. Using the line tool in the schematic editor, draw the shape of the LEDs. (eg a
block figure 8)
2. Place net names on each of the lines. Use the same net names as those that
drive the real LEDs. Use the 'Add net or bus name' button (the 4th from the bottom -
left side) to place the names.
3. Place probes on the net names of the lines (and the real driver nets if desired)
and simulate. When stepping thru the simulation, you will be able to see the probes
changing states.
NOTE: The entire line of each LED bit will not light, only the probe will, but this gives
a rough simulated display of the actual LEDs.
The Flash and Watch sample designs contain examples of doing this.
End of Record #4092 - Last Modified: 08/04/98 14:26 |
