30. PWM with 4-bit Resolution

How do you plan to solve it?

/*Write your code here*/
module pwm4_basic(input wire clk,input wire rst,input wire [3:0] duty,output reg pwm_out);
reg [3:0] cnt;
always @(posedge clk) begin
    pwm_out <= rst ? 1'b0 : (cnt <duty);
    cnt <=rst ? 4'b0 :(cnt +4'b1);
end
endmodule