Subversion Repositories lpffir

//////////////////////////////////////////////////////////////////////

////                                                              ////

////  Low Pass Filter FIR  with AXI-Stream Interface              ////

////                                                              ////

////  This file is part of the LPFFIR project                     ////

////  https://opencores.org/projects/lpffir                       ////

////                                                              ////

////  Description                                                 ////

////  Implementation of AXI-Stream (AXIS) protocol rapper         ////

///   of LPFFIR IP core according to                              ////

////  LPFFIR IP core specification document.                      ////

////                                                              ////

////  To Do:                                                      ////

////  -                                                           ////

////                                                              ////

////  Author:                                                     ////

////  - Vladimir Armstrong, vladimirarmstrong@opencores.org       ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (C) 2019 Authors and OPENCORES.ORG                 ////

////                                                              ////

//// This source file may be used and distributed without         ////

//// restriction provided that this copyright statement is not    ////

//// removed from the file and that any derivative work contains  ////

//// the original copyright notice and the associated disclaimer. ////

////                                                              ////

//// This source file is free software; you can redistribute it   ////

//// and/or modify it under the terms of the GNU Lesser General   ////

//// Public License as published by the Free Software Foundation; ////

//// either version 2.1 of the License, or (at your option) any   ////

//// later version.                                               ////

////                                                              ////

//// This source is distributed in the hope that it will be       ////

//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////

//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////

//// PURPOSE.  See the GNU Lesser General Public License for more ////

//// details.                                                     ////

////                                                              ////

//// You should have received a copy of the GNU Lesser General    ////

//// Public License along with this source; if not, download it   ////

//// from http://www.opencores.org/lgpl.shtml                     ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

module lpffir_axis (

                    input               aclk_i,

                    input               aresetn_i,

                    // AXI-Stream RX interface

                    input               rx_tlast_i,

                    input               rx_tvalid_i,

                    output logic        rx_tready_o,

                    input [15:0]        rx_tdata_i,

                    // AXI-Stream TX interface

                    output logic        tx_tlast_o,

                    output reg          tx_tvalid_o,

                    input               tx_tready_i,

                    output logic [15:0] tx_tdata_o

                    );

   logic                                lpffir_en = rx_tvalid_i && tx_tready_i;

   // AXI-Stream interface

   assign rx_tready_o = lpffir_en;

   assign tx_tvalid_o = lpffir_en;

   assign tx_tlast_o  = rx_tlast_i;

   // LPFFIR

   lpffir_core lpffir_core(

                           .clk_i(aclk_i),

                           .rstn_i(aresetn_i),

                           .en_i(lpffir_en),

                           .x_i(rx_tdata_i),

                           .y_o(tx_tdata_o)

                           );

endmodule