How To apply inputs from Tcl Script - ModelSim

ModelSim Simulator allows us to run tcl script from its CLI.The input stimulus to be generated and output signals to be monitored (ie., examine <signal>) can be given in tcl script.

File name : <file-name>.tcl

                Example : stimulus.tcl 

How to Run tcl script from ModelSim CLI  ?

source  <path>/<file-name>.tcl

Example : source  stimulus.tcl 

In this example the script file is located in project base directory.

Below are some sample tcl scripts ,use and modify according to your needs.

Example 1.  

 This script will restart the simulation from time 0 ,adds input signals and runs the simulation .Open a file in text editor and save it with tcl extension (ie., stimulus.tcl) and then copy paste the below code.

  # This is a TCL script #  
  # File Name : stimulus.tcl #  
  # How To run : source stimulus.tcl #  
  #       execute this command in Isim CLI#  
  #       and path to stimulus.tcl should be given#  
  #       if its in different directory #   
  puts "..restarting simulation.."  
  restart  
  puts "..inserting input stimulus.."  
  force sig 0 0 ns, 1 40 ns -repeat 100 ns  
  force clock 0 0 ns , 1 20 ns  -repeat 40 ns  
  puts "..running simulation.."  
  run