Subversion Repositories freq_div

`include "defines.v"

module even(clk, out, P, reset, not_zero, enable);

        input clk;

        output out;

        input [`SIZE-1:0] P;

        input reset;

        input not_zero;

        input enable;

        reg [`SIZE-1:0] counter;

        reg out_counter;

        wire [`SIZE-1:0] div_2;

        assign out = (clk & !not_zero) | (out_counter & not_zero);

        assign div_2 = {1'b0, P[`SIZE-1:1]};

        always @(posedge reset or posedge clk)

        begin

                if(reset)

                begin

                        counter <= 1;

                        out_counter <= 1;

                end

                else if(enable)

                begin

                        if(counter == 1)

                        begin

                                counter <= div_2;

                                out_counter <= ~out_counter;

                        end

                        else

                        begin

                                counter <= counter-1;

                        end

                end

        end

endmodule //even