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Verilog XL Tutorial for Beginners

This tutorial provides a basic step-through guide to get familiar with Verilog XL simulation. Learn how to create, import, run, and simulate Verilog files using Cadence ICFB and SimVision. Check your code and circuit simulation output with ease.

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Verilog XL Tutorial for Beginners

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  1. Verilog XL Tutorial By Greg Edmiston Scott McClure August 2004

  2. Tutorial Disclaimer • This tutorial includes one way of simulating in Verilog XL. This is not necessarily the best way of simulating, depending on your requirements. This tutorial is a simple step-through designed to familiarize the user with Verilog XL, and thus is basic in nature. More advance simulations are not found in this tutorial.

  3. Create Verilog File • Create a text file with the text shown here • This code represents a basic circuit with delay and test stimulus • Save as “example.v” • Verilog code files often have a “.v” file extension

  4. Enter ICFB • Type “who am i” • Gives xhost address • setenv DISPLAY {xhost} • Type “icfb &” to start Cadence

  5. Import Verilog File in ICFB • Import the “example.v” Verilog file by choosing File >> Import >> Verilog in ICFB CIW

  6. Importing Verilog File • “Verilog In” window pops up • Set Target Library Name to “new” • Highlight “example.v” in file selection box at the top of the window • Press the Add button on the “Verilog Files to Import” line • Click OK at the top of the “Verilog In” window

  7. Verify File Import • Open up the Library Manger from the CIW and inspect to ensure the “new” library includes a cell named “circuit_with_delay”

  8. Verify File Import • Open the Schematic view of the “circuit_with_delay” from the Library Manager and verify that it resembles the screenshot to the left

  9. Running Verilog XL • Close all windows except a terminal • From your home directory type “verilog +gui example.v” • Verilog should open with your example loaded • Note: “example.v” has to be saved in your home directory for this command to function

  10. Simulating with Verilog XL • Verilog should open the SimVision Design Browser and Console • The stimcrct module should be displayed under the simulator icon

  11. Simulating with Verilog XL • Click on the stimcrct icon • The circuit inputs and outputs should now be visible under Signal/Variable

  12. Simulating with Verilog • With the stimcrct highlighted choose Select>>Signals

  13. Simulating with Verilog XL • Now that the signals are highlighted, send them to the logic display by clicking on the indicated button Click Here

  14. Simulating with Verilog XL • Click the Play button to run the simulation Run Button

  15. Simulating with Verilog XL • Since the simulation has no initial stop point the output will appear similar to the window to the left

  16. Simulating with Verilog XL • To rerun the simulation it must first be reset • Reset the simulation by choosing “Reinvoke Simulator” from the simulation menu

  17. Simulation with Verilog XL • Run the simulation by pressing the Run button Run Button

  18. Simulation with Verilog XL • Simulation output should look like this

  19. Conclusion • This concludes the Verilog XL Tutorial • This tutorial was derived from the SMU Cadence Verilog XL Tutorial • http://engr.smu.edu/~mitch/class/3381/verilog_intro.pdf

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