📌 Question

Build a 4-bit binary counter that counts from 0 through 15, inclusive, with a period of 16. The reset input is synchronous, and should reset the counter to 0.

🧑‍💻 Code Example

module top_module (
    input clk,
    input reset,      // Synchronous active-high reset
    output reg [3:0] q);
    
    always @ (posedge clk) begin
        if (reset) begin
           q <= 4'b0;
        end
        else begin
           q <= q + 1'b1; 
        end
    end

endmodule

📚 Reference