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