30. PWM with 4-bit Resolution

How do you plan to solve it?

/*Write your code here*/
module pwm4_basic(input wire clk, rst, input [3:0] duty, output reg pwm_out);

reg [3:0] cnt;
always@(posedge clk) begin
    if(rst) begin
        pwm_out <= 1'b0;
        cnt <= 4'b0000;
    end
    else begin
         cnt <= cnt + 1;
        if(cnt < duty) begin
            pwm_out <= 1'b1;
        end
        else begin
            pwm_out <= 1'b0;
        end
    end
end

endmodule