[raggedstone] / dhwk_old / source / wb_fifo.v

module wb_fifo (clk_i, nrst_i, wb_adr_i, wb_dat_o, wb_dat_i, wb_sel_i, wb_we_i, 
        wb_stb_i, wb_cyc_i, wb_ack_o, wb_err_o, wb_int_o, fifo_data_i, fifo_data_o, fifo_we_o, fifo_re_o);

        input clk_i;
        input nrst_i;
        input [24:1] wb_adr_i;
        output [15:0] wb_dat_o;
        input [15:0] wb_dat_i;
        input [1:0] wb_sel_i;
        input wb_we_i;
        input wb_stb_i;
        input wb_cyc_i;
        output wb_ack_o;
        output wb_err_o;
        output wb_int_o;
        input [7:0] fifo_data_i;
        output [7:0] fifo_data_o;
        output fifo_we_o;
        output fifo_re_o;

        reg [15:0] data_reg;

        always @(posedge clk_i or negedge nrst_i)
        begin
                if (nrst_i == 0)
                        data_reg <= 16'h0000;
                else 
                        if (wb_stb_i && wb_we_i)
                                data_reg <= wb_dat_i;
        end

        assign fifo_we_o = 1'b1;
        assign fifo_data_o = data_reg;

        assign wb_ack_o = wb_stb_i;
        assign wb_err_o = 1'b0;
        assign wb_int_o = 1'b0;
        assign wb_dat_o = data_reg;

endmodule