limit_vcd - 2023.1 English

Vivado Design Suite Tcl Command Reference Guide (UG835)

Document ID
UG835
Release Date
2023-05-16
Version
2023.1 English

Limit the maximum size of the VCD file on disk (equivalent of $dumplimit verilog task)

Syntax

limit_vcd [‑ports] [‑file <arg>] [‑quiet] [‑verbose] <filesize>

Usage

Name Description
[-ports] Control extended vcd dump file.
[-file] Specify the file where ports have to limit the file size in dumping . Default: Limits all dumpport files
[-quiet] Ignore command errors
[-verbose] Suspend message limits during command execution
<filesize> Specify the maximum size of the VCD file in bytes.

Categories

Description

Specify the size limit, in bytes, of the Value Change Dump (VCD) file. This command operates like the Verilog $dumplimit simulator directive.

When the specified file size limit has been reached, the dump process stops, and a comment is inserted into the VCD file to indicate that the file size limit has been reached.

Note: You must run the open_vcd command before using the limit_vcd command.

Arguments

-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.
Note: Any errors encountered on the command-line, while launching the command, will be returned. Only errors occurring inside the command will be trapped.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
Note: Message limits can be defined with the set_msg_config command.

<filesize> - (Required) Specify the file size limit of the open VCD file in bytes.

Examples

The following example limits the current VCD file:

limit_vcd 1000