Day-33

In this Verilog module:

• inputs is an N-bit vector representing the N input signals to be prioritized.
• output is an N-bit vector representing the highest priority input. Only one bit will be set in this vector, indicating the highest priority input.

Inside the always block, the module iterates through each input signal and checks if it's asserted (high). If an asserted input is found and no higher priority input has been found yet (indicated by priority_output being 0), it sets the corresponding bit in priority_output. This ensures that the highest priority input is selected.

Finally, the assign statement assigns the priority_output to the output port.

In this testbench:

1. We define a parameter N to specify the number of inputs (set to 3 in this example).

2. We instantiate the PriorityResolver module and connect its inputs and output.

3. In the initial block, we use a for loop to test all possible input combinations for 3 inputs (0 to 7 in binary).

4. We monitor the inputs and output signals at each simulation time step.

5. We introduce a delay of 10 time units after each input combination change to allow time for the output to settle.

6. Finally, we use $finish to end the simulation.

You can modify the N parameter to match the number of inputs in your specific priority resolver design. Please note that for a large number of inputs, testing all possible combinations may not be practical due to the exponential growth in the number of combinations. In such cases, you might consider using random testing or selecting a representative subset of test cases.