- The following command opens a VCD database named
vcddb. The filename is verilog.dump. The-timescaleoption sets the$timescalevalue in the VCD file to 1 ns. Value changes in the VCD file are scaled to 1 ns.database -open -vcd vcddb -into verilog.dump -default -timescale ns - The following
probecommand creates a probe on all ports in the scopetop.counter. Data is sent to the default VCD database.probe -create -vcd top.counter -ports - Run the simulation.