30. PWM with 4-bit Resolution

How do you plan to solve it?

module pwm4_basic(clk,rst,duty,pwm_out);
 input clk;
 input rst;
 input [3:0]duty;
 output  reg pwm_out;
 reg [3:0]counter=0;
 reg [4:0]cnt=0;
 always@(posedge clk)begin
 if (rst)begin
   pwm_out<=0;
   counter<=0; 
   cnt<=0;
 end
 else begin
 counter<=counter+1;
  if(counter<duty)begin
    pwm_out<=1;
    counter<=counter+1; end
  else pwm_out<=0;
  if(counter==5'd16)begin
    counter<=0;
  end

 end
 end
 



endmodule