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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  MP3 demo Audio Interface Top Level                          ////
////                                                              ////
////  This file is part of the MP3 demo application               ////
////  http://www.opencores.org/cores/or1k/mp3/                    ////
////                                                              ////
////  Description                                                 ////
////  Audio interface top level for XSV board instantiating       ////
////  FIFOs, WISHBONE interface and XSV CODEC interface.          ////
////                                                              ////
////  To Do:                                                      ////
////   - nothing really                                           ////
////                                                              ////
////  Author(s):                                                  ////
////      - Lior Shtram, lior.shtram@flextronicssemi.com          ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2001 Authors                                   ////
////                                                              ////
//// 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                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
 
module audio_top (
	clk, rstn,
 
	wb_dat_i, wb_dat_o, wb_adr_i, wb_sel_i, wb_we_i, wb_cyc_i,
	wb_stb_i, wb_ack_o, wb_err_o,
 
	mclk, lrclk, sclk, sdin, sdout,
 
	audio_dreq,
 
	igor, simon, USB_VPO, USB_VMO
 
 
);
 
input		clk;
input		rstn;
 
input [31:0]	wb_dat_i;
output [31:0]	wb_dat_o;
input [31:0]	wb_adr_i;
input [3:0]	wb_sel_i;
input		wb_we_i;
input		wb_cyc_i;
input		wb_stb_i;
output		wb_ack_o;
output		wb_err_o;
 
output		mclk;
output		lrclk;
output		sclk;
output		sdin;
input		sdout;
 
output		audio_dreq;
 
input 	igor;
input   simon;
output   USB_VPO;
output   USB_VMO;
 
parameter fifo_width = 16;
 
wire [fifo_width-1:0]	fifo_data_i;
wire [fifo_width-1:0]	fifo_data_o;
wire 		fifo_clk_wr;
wire		fifo_clk_rd;
wire		fifo_full;
wire		fifo_empty;
wire		fifo_almost_full;
wire		fifo_almost_empty;
wire		fifo_rd_en;
wire		fifo_wr_en;
 
assign audio_dreq = fifo_almost_empty;
assign USB_VPO = fifo_almost_full;
assign USB_VMO = fifo_almost_empty;
 
 
 
audio_wb_if	i_audio_wb_if(
		.rstn( rstn ),
		.clk( clk ),
		.wb_dat_i( wb_dat_i ),
		.wb_dat_o( wb_dat_o ),
		.wb_adr_i( wb_adr_i ),
		.wb_sel_i( wb_sel_i ),
		.wb_we_i( wb_we_i ),
		.wb_cyc_i( wb_cyc_i ),
		.wb_stb_i( wb_stb_i ),
		.wb_ack_o( wb_ack_o ),
		.wb_err_o( wb_err_o ),
		.fifo_dat_o( fifo_data_i ),
		.fifo_clk_o( fifo_clk_wr ),
		.fifo_wr_en( fifo_wr_en ),
		.fifo_full( fifo_full ),
		.fifo_empty( fifo_empty ),
		.fifo_almost_full( fifo_almost_full ),
		.fifo_almost_empty( fifo_almost_empty ),
		.simon(igor),
		.igor(simon)
 
		);
 
`ifdef AUDIO_NO_FIFO
fifo_empty_16	i_audio_fifo (
		.AINIT( !rstn ),
		.DIN( fifo_data_i ),
		.DOUT( fifo_data_o ),
//		.WR_CLK( fifo_clk_rd ),
//		.RD_CLK( fifo_clk_wr ),
		.WR_CLK( fifo_clk_wr ),
		.RD_CLK( fifo_clk_rd ),
		.RD_EN( fifo_rd_en ),
		.WR_EN( fifo_wr_en ),
		.EMPTY( fifo_empty ),
		.FULL( fifo_full ),
		.ALMOST_EMPTY( fifo_almost_empty ),
		.ALMOST_FULL( fifo_almost_full )
		);
`else
/*
fifo8kx16 i_audio_fifo (
		.AINIT( !rstn ),
		.DIN( fifo_data_i ),
		.DOUT( fifo_data_o ),
//		.WR_CLK( fifo_clk_rd ),
//		.RD_CLK( fifo_clk_wr ),
		.WR_CLK( fifo_clk_wr ),
		.RD_CLK( fifo_clk_rd ),
		.RD_EN( fifo_rd_en ),
		.WR_EN( fifo_wr_en ),
		.EMPTY( fifo_empty ),
		.FULL( fifo_full ),
		.ALMOST_EMPTY( fifo_almost_empty ),
		.ALMOST_FULL( fifo_almost_full )
		);
*/
 
fifo_4095_16	i_audio_fifo (
		.AINIT( !rstn ),
		.DIN( fifo_data_i ),
		.DOUT( fifo_data_o ),
//		.WR_CLK( fifo_clk_rd ),
//		.RD_CLK( fifo_clk_wr ),
		.WR_CLK( fifo_clk_wr ),
		.RD_CLK( fifo_clk_rd ),
		.RD_EN( fifo_rd_en ),
		.WR_EN( fifo_wr_en ),
		.EMPTY( fifo_empty ),
		.FULL( fifo_full ),
		.ALMOST_EMPTY( fifo_almost_empty ),
		.ALMOST_FULL( fifo_almost_full )
		);
 
 
`endif
/*
fifo_1023_16 i_audio_fifo (
		.AINIT( !rstn ),
		.DIN( fifo_data_i ),
		.DOUT( fifo_data_o ),
		.WR_CLK( clk ),
		.RD_CLK( clk ),
		.RD_EN( fifo_rd_en ),
		.WR_EN( fifo_wr_en ),
		.EMPTY( fifo_empty ),
		.FULL( fifo_full ),
		.ALMOST_EMPTY( fifo_almost_empty ),
		.ALMOST_FULL( fifo_almost_full )
		); // synthesis black_box
*/
 
 
 
 
`ifdef UNUSED
assign fifo_data_o = fifo_data_i;
assign fifo_full = 1'b0;
assign fifo_empty = 1'b0;
assign fifo_almost_full = 1'b0;
assign fifo_almost_empty = 1'b0;
`endif
 
audio_codec_if  i_audio_codec_if (
		.rstn( rstn ),
		.clk( clk ),
		.fifo_clk( fifo_clk_rd ),
		.fifo_data( fifo_data_o ),
		.fifo_rd_en( fifo_rd_en ),
		.sclk( sclk ),
		.mclk( mclk ),
		.lrclk( lrclk ),
		.sdout( sdout ),
		.sdin( sdin )
		);
endmodule