2.5. Writing and Simulating VHDL and Verilog Code

Try these first

1. 1.

   What is the purpose of using simulation tools in FPGA design?

   Hint

   Think about the process of testing designs.

2. 2.

   What does a testbench do?

   Hint

   Remember that it’s like a practice run for designs.

3. 3.

   What is the primary function of testbenches?

   • Providing graphic outputs
   • Simulating and verifying design functionality
   • Designing new algorithms

   Hint

   Consider the purpose of test tools in coding.

4. 4.

   True or False: The VHDL testbench utilizes wire data types for outputs.

   • True
   • False

   Hint

   Think about which language you are referring to.

5. 5.

   Design a testbench for a simple 2:1 multiplexer in VHDL. Ensure that you cover all possible input combinations.

   Hint

   Use the structure from previous testbenches as a template.

6. 6.

   In Verilog, write a testbench for a counter that counts from 0 to 3 and then resets. Include timing control in your testbench.

   Hint

   Think of how counters operate and what conditions trigger resetting.