The Tcl source command

The Tcl source command reads the Tcl file into the Tcl interpreter, which parses the procedures for use within the current environment. Once sourced, a Tcl procedure can be called from the ModelSim prompt as shown in the syntax below. ModelSim executes the instructions within the procedure.

Syntax

source <tcl filename> 
<tcl procedure name> 

Arguments

<tcl filename>  

The Tcl file read into the ModelSim Tcl interpreter with the source command.

<tcl procedure name> 

The Tcl procedure defined within <tcl filename>, called from the ModelSim prompt, and executed by ModelSim.

The traffic.do file is a good example of the source command syntax (the file is a macro that runs the traffic light simulation). View it with Notepad:

notepad traffic.do 

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