HDL Cosimulation of a Bandpass Filter Using Simulink

 Learn how to use HDL cosimulation to quickly test your Verilog or VHDL code using Simulink®. Traditional HDL verification requires creating and maintaining separate HDL testbenches to conduct unit testing of your Verilog design. With HDL cosimulation, you can reuse your existing Simulink testbench to drive your Verilog code running in Cadence® Xcelium™ while leveraging built-in time and spectral analysis in Simulink to verify the design meets specification. 

With one Simulink test harness, perform bit-and-cycle accurate comparisons against a Simulink block–based representation of the design to determine how closely they match. Finally, leverage MATLAB® and its toolboxes for further post-processing as the Verilog cosimulation output is logged directly in the MATLAB workspace. Put HDL cosimulation to work to accelerate your HDL verification efforts. 

Additional resources:

Verify HDL Module with Simulink Testbench: https://bit.ly/4fpd6AP

Get Started with Simulink HDL Cosimulation: https://bit.ly/48rYyyr

Simulation Timescales: https://bit.ly/4f1349v

Clock, Reset, and Enable Signals: https://bit.ly/3C4gRO1

Timescales: Absolute, Relative and Automatic: https://bit.ly/4feheUA

filterDesigner: https://bit.ly/3NPWnuJ

Fixed-Point Tool: https://bit.ly/3NKerqk

 

Chapters:  

00:00 Overview of HDL cosimulation 

02:00 The larger workflow leading up to cosimulation 

04:25 Designing the bandpass filter in MATLAB 

06:08 Testing the filter in Simulink 

06:33 Optimizing the fixed-point design 

07:28 Why cosimulation? 

09:07 The Simulink starting point model 

11:00 Walkthrough using cosimWizard 

13:12 Defining control signals such as clock and reset using TcL script 

15:15 Define Simulink sample times and data types for cosimulation output signals 

20:00 Wire up generated cosimulation block in Simulink testbench model 

21:00 Add blocks for bit-and-cycle accurate testing 

22:23 Launch Cadence Xcelium cosimulation 

23:00 Run cosimulation from Simulink 

25:35 Customize MATLAB callbacks to run cosimulation in batch mode