register_proc - 2022.1 English

Vivado Design Suite Tcl Command Reference Guide (UG835)

Document ID
Release Date
2022.1 English

Register a Tcl proc with Vivado.


register_proc [‑quiet] [‑verbose] <proc> [<tasknm>]




Name Description
[-quiet] Ignore command errors
[-verbose] Suspend message limits during command execution
<proc> Name of proc to register. Proc must be known to Tcl
[<tasknm>] Name of Tcl task that wraps the proc. Default: Register the proc using the root name proc (no namespaces).




Register a Tcl procedure (proc) with the Vivado® Tcl command interpretor to register the command with the Vivado Design Suite help system.

The following is an example Tcl proc defined for use with the Vivado Design Suite:
proc findCommand {option} {
  # Summary:
  # Searches through all Vivado Tcl commands for commands implementing
  #   the specified argument.
  # Argument Usage:
  # option: Specifies the argument to search for.
  # Return Value:
  # Returns a list of Tcl commands that implement the option.
  # Categories: personal
  foreach cmd [lsort [info commands *]]
       catch {
          if {[regexp "$option" [help -syntax $cmd]]}
             puts $cmd
  } ;
  # End
The commented lines beginning with '#' are used to define the help text for the registered command in the Vivado Design Suite help system.
  • # Summary: provides a brief description of the command.
  • # Argument Usage: provides a list and description of the various arguments for the proc.
  • # Return Value: provides a description of what is returned by the proc.
  • # Categories: provides an ability to define categories for registered procedures.
After registering the procedure as a Tcl command, the Vivado help system will return this text when queried with:
tasknm -help
help tasknm

This command returns the name of the registered proc.


-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.

<proc> - (Required) The name of the Tcl procedure loaded into the current Vivado Design Suite session. The Tcl proc must be defined and loaded into the Vivado Design Suite prior to registration.

<tasknm> - (Optional) Specify the Tcl command name that wraps the proc, for use in the Vivado Design Suite. Default: Register the proc using the root name proc.


The following example registers a Tcl proc called findCommand as a Tcl command named findCmd:
register_proc findCommand findCmd

See Also