Generate VCD ports for the instance
Syntax
generate_vcd_ports [‑quiet] [‑verbose] <scope>Usage
| Name | Description |
|---|---|
[-quiet]
|
Ignore command errors |
[-verbose]
|
Suspend message limits during command execution |
<scope>
|
Instance scope hierarchy |
Categories
Description
Open a VCD file handle for writing the port activity of the design unit instance. The
VCD file is read by create_testbench Tcl command to read the port
activity for writing stimuli source. The instance can be selected from the scope
window in XSim simulator IDE or by specifying the hierarchical path to the instance
when executing this command from Tcl console.
The command creates dummports.vcd file that will get populated when
running simulation for the selected instance scope.
If running this command from Vivado IDE, then the dumpports.vcd file
will be created in the simulation run directory. If running this command from XSim
standalone GUI, then the dumpports.vcd file will be created in
vcd2tb sub-directory in the current directory.
Arguments
-scope <arg> - (Required) Specify the instance scope hierarchy
name.
-quiet - (Optional) Execute the command quietly, returning no
messages from the command. The command also returns TCL_OK
regardless of any errors encountered during execution.-verbose- (Optional) Temporarily override any message limits and
return all messages from this command.set_msg_config command.Examples
The following commands will create VCD file for /top/DUT/fifo/buf_1 instance of type buf module, record waveform activity for 2000ns, and close the VCD file handle:
generate_vcd_ports {/top/DUT/fifo/buf_1}
run 2000ns
close_vcd -ports