source: trunk/MultiChannelCOM/baud_gen.v@ 109

module baud_gen
        #(
                parameter       INC=1208,       // counter increment (115200*16*32768/F_clk)
                                        DIV=1           // divider (baud rate = 115200/D)
        )
        (
                input wire clk, reset,
                output wire max_tick
        );
        
        //signal declaration
        reg [15:0] acc_reg;
        reg [7:0] div_reg;
         
        wire div_reg_max = (div_reg == (DIV-1));

        // body
        always @(posedge clk, posedge reset)
        begin
                if (reset)
                        begin
                                acc_reg <= 0;
                                div_reg <= 0;
                        end
                else
                        begin
                                acc_reg <= acc_reg[14:0] + INC;
                                if (acc_reg[15])
                                        div_reg <= div_reg_max ? 0 : div_reg + 16'd1;
                        end
        end

   // output logic
   assign max_tick = acc_reg[15] & div_reg_max;

endmodule