source: sandbox/MultiChannelUSB/delay.v@ 185

module delay
        #(
                parameter       width   =       12,
                parameter       length  =       32
        )
        (
                input   wire                            clock, frame, reset,
                input   wire    [width-1:0]     inp_data,
                output  wire    [width-1:0]     out_data
        );
        
        reg             [width-1:0]     int_pipe_reg [length-1:0];
        
        integer i;

        always @(posedge clock)
        begin
                if (reset)
        begin
                        for(i = 0; i < length; i = i + 1)
                        begin
                                int_pipe_reg[i] <= 0;
                        end
        end
        else if (frame)
                begin
                        for(i = 0; i <= 30; i = i + 1)
                        begin
                                int_pipe_reg[i+1] <= int_pipe_reg[i];
                        end
                        int_pipe_reg[0] <= inp_data;
                end
        end

        assign out_data = int_pipe_reg[length-1];

endmodule