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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  MP3 demo Test bench top level                               ////
////                                                              ////
////  This file is part of the MP3 demo application               ////
////  http://www.opencores.org/cores/or1k/mp3/                    ////
////                                                              ////
////  Description                                                 ////
////  Top level of MP3 demo test bench.                           ////
////                                                              ////
////  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 $
// Revision 1.1  2002/03/28 19:59:55  lampret
// Added bench directory
//
// Revision 1.2  2002/01/03 08:40:15  lampret
// Added second clock as RISC main clock. Updated or120_monitor.
//
// Revision 1.1.1.1  2001/11/04 18:51:07  lampret
// First import.
//
//
// Xess board - top bench module
 
`include "timescale.v"
`include "bench_defines.v"
 
module xess_top (
);
 
`ifdef SRAM_INIT
sram_init sram_init1();
`endif
 
reg		r_rstn;
reg		r_clk;	
wire		rstn;
wire		clk;
 
wire		flash_rstn;
wire		flash_oen;
wire		flash_cen;
wire		flash_wen;
wire		flash_rdy;
wire [7:0]	flash_d;
wire [20:0]	flash_a;
wire [31:0]	flash_vpp;		// Special flash inputs
wire [31:0]	flash_vcc;		// Special flash inputs
wire [1:0]	flash_rpblevel;		// Special flash inputs
wire          	sram_r_cen;
wire          	sram_r0_wen;
wire          	sram_r1_wen;
wire          	sram_r_oen;
wire [18:0]   	sram_r_a;
wire [15:0]    	sram_r_d;
wire          	sram_l_cen;
wire          	sram_l0_wen;
wire          	sram_l1_wen;
wire          	sram_l_oen;
wire [18:0]   	sram_l_a;
wire [15:0]    	sram_l_d;
wire	        codec_mclk;
wire          	codec_lrclk;
wire          	codec_sclk;
wire          	codec_sdin;
wire           	codec_sdout;
wire		vga_hsyncn;
wire		vga_vsyncn;
wire [1:0]	vga_r;
wire [1:0]	vga_g;
wire [1:0]	vga_b;
wire          	eth_tx_er;
wire           	eth_tx_clk;
wire          	eth_tx_en;
wire [4:0]    	eth_txd;
wire           	eth_rx_er;
wire           	eth_rx_clk;
wire           	eth_rx_dv;
wire [4:0]     	eth_rxd;
wire           	eth_col;
wire           	eth_crs;
wire          	eth_trste;
wire           	eth_fds_mdint;
wire           	eth_mdio;
wire          	eth_mdc;
wire [2:1]     	switch;
wire            USB_VPO;
wire            USB_VMO;
wire		gdb_tms;
wire		gdb_tck;
wire		gdb_trst;
wire		gdb_tdi;
wire		gdb_tdo;
wire	[6:3]	pps;
 
// Putting here the following blocks
 
// The xfpga_top
 
xsv_fpga_top i_xess_fpga(
	.clk( clk ),
	.rstn( rstn ),
 
        .flash_rstn( flash_rstn ),
        .flash_cen( flash_cen ),
        .flash_oen( flash_oen ),
        .flash_wen( flash_wen ),
        .flash_rdy( flash_rdy ),
        .flash_d( flash_d ),
        .flash_a( flash_a ),
 
        .sram_r_cen( sram_r_cen ),
        .sram_r_oen( sram_r_oen ),
        .sram_r0_wen( sram_r0_wen ),
        .sram_r1_wen( sram_r1_wen ),
        .sram_r_d( sram_r_d ),
        .sram_r_a( sram_r_a ),
 
	.sram_l_cen( sram_l_cen ),
        .sram_l_oen( sram_l_oen ),
        .sram_l0_wen( sram_l0_wen ),
        .sram_l1_wen( sram_l1_wen ),
        .sram_l_d( sram_l_d ),
        .sram_l_a( sram_l_a ),
 
	.codec_mclk( codec_mclk ),
	.codec_lrclk( codec_lrclk ),
	.codec_sclk( codec_sclk ),
	.codec_sdin( codec_sdin ),
	.codec_sdout( codec_sdout ),
 
	.vga_blank(),
	.vga_pclk(),
	.vga_hsyncn( vga_hsyncn ),
	.vga_vsyncn( vga_vsyncn ),
	.vga_r( vga_r ),
	.vga_g( vga_g ),
	.vga_b( vga_b ),
 
	.eth_col( eth_col ),
	.eth_crs( eth_crs ),
	.eth_trste( eth_trste ),
	.eth_tx_clk( eth_tx_clk ),
	.eth_tx_en( eth_tx_en ),
	.eth_tx_er( eth_tx_er ),
	.eth_txd( eth_txd ),
	.eth_rx_clk( eth_rx_clk ),
	.eth_rx_dv( eth_rx_dv ),
        .eth_rx_er( eth_rx_er ),
        .eth_rxd( eth_rxd ),
        .eth_fds_mdint( eth_fds_mdint ),
        .eth_mdc( eth_mdc ),
        .eth_mdio( eth_mdio ),
 
        .sw( switch ),
 
	.ps2_clk( ps2_clk ),
	.ps2_data( ps2_data ),
 
	.tdmfrm(1'b0),
	.tdmrx(1'b0),
	.tdmtx()
//        .cpld_tdo(cpld_tdo)
 
);
 
// The Flash RAM
 
assign flash_vpp = 32'h00002ee0;
assign flash_vcc = 32'h00001388;
assign flash_rpblevel = 2'b10;
 
i28f016s3 Flash (
        .rpb( flash_rstn ),
        .ceb( flash_cen ),
        .oeb( flash_oen ),
        .web( flash_wen ),
        .ryby( flash_rdy ),
        .dq( flash_d ),
        .addr( flash_a ),
	.vpp( flash_vpp ),
	.vcc( flash_vcc ),
	.rpblevel( flash_rpblevel )
);
 
// The SRAM
 
A512Kx8 Sram_r0 (
	.CE_bar( sram_r_cen ),
	.OE_bar( sram_r_oen ),
	.WE_bar( sram_r0_wen ),
	.dataIO( sram_r_d[7:0] ),
	.Address( sram_r_a )
);
 
A512Kx8 Sram_r1 (
	.CE_bar( sram_r_cen ),
	.OE_bar( sram_r_oen ),
	.WE_bar( sram_r1_wen ),
	.dataIO( sram_r_d[15:8] ),
	.Address( sram_r_a )
);
 
A512Kx8 Sram_l0 (
	.CE_bar( sram_l_cen ),
	.OE_bar( sram_l_oen ),
	.WE_bar( sram_l0_wen ),
	.dataIO( sram_l_d[7:0] ),
	.Address( sram_l_a )
);
 
A512Kx8 Sram_l1 (
	.CE_bar( sram_l_cen ),
	.OE_bar( sram_l_oen ),
	.WE_bar( sram_l1_wen ),
	.dataIO( sram_l_d[15:8] ),
	.Address( sram_l_a )
);
 
// The Codec
 
codec_model codec (
	.mclk( codec_mclk ),
	.lrclk( codec_lrclk ),
	.sclk( codec_sclk ),
	.sdin( codec_sdin ),
	.sdout( codec_sdout )
);
 
// The VGA
 
vga_model VGA (
	.pclk( clk ),
	.hsyncn( vga_hsyncn ),
	.vsyncn( vga_vsyncn ),
	.r( vga_r ),
	.g( vga_g ),
	.b( vga_b )
);
 
// We simulate CPLD because it has GDB JTAG multiplexer that
// works together with demultiplexer in FPGA to connect GDB to
// the RISC
`ifdef UNUSED
config_gdb xcpld (
	.clk(clk),
	.a(flash_a),
	.ceb(),
	.oeb(),
	.web(),
	.resetb(),
	.V_progb(),
	.V_cclk(),
	.V_csb(),
	.V_wrb(),
	.V_initb(cpld_tdo),
	.V_dout(1'b0),
	.V_done(1'b1),
	.V_m(),
 
	.ppd({2'b00, gdb_tms, gdb_tdi, gdb_trst, gdb_tck, 2'b00}),
	.pps(pps),
	.ppc(4'h0)
);
assign gdb_tdo = pps[4];
`else
/* SIMON */
 
assign flash_a[6] = flash_cen ? gdb_tms : 1'bz;
assign flash_a[7] = flash_cen ? gdb_tdi : 1'bz;
assign flash_a[8] = flash_cen ? gdb_trst : 1'bz;
assign flash_a[9] = flash_cen ? gdb_tck : 1'bz;
//assign gdb_tdo = cpld_tdo;
/*
assign flash_a[6] =  gdb_tms;
assign flash_a[7] =  gdb_tdi;
assign flash_a[8] =  gdb_trst;
assign flash_a[9] =  gdb_tck;
assign gdb_tdo = cpld_tdo;
*/
`endif
 
// DBG i/f
`ifdef DBG_IF_COMM
dbg_comm dbg_comm(
`else
`ifdef DBG2_IF_COMM
dbg_comm2 dbg_comm(
	.P_TMS(gdb_tms),
	.P_TCK(gdb_tck),
	.P_TRST(gdb_trst),
	.P_TDI(gdb_tdi),
	.P_TDO(gdb_tdo)
);
`else
assign gdb_tms = 1'b0;
assign gdb_tck = 1'b0;
assign gdb_trst = rstn;
assign gdb_tdi = 1'b0;
`endif
`endif
	assign eth_tx_clk = 1'b0;
	assign eth_rx_er = 1'b0;
	assign eth_rx_clk = 1'b0;
	assign eth_rx_dv = 1'b0;
	assign eth_rxd = 5'b0;
	assign eth_col= 1'b0;
	assign eth_crs = 1'b0;
	assign eth_fds_mdint = 1'b0;
	assign eth_mdio = 1'bZ;
	assign switch = 2'b0;
 
	assign ps2_clk = 1'b0;
	assign ps2_data = 1'b0;
 
initial
begin
   #0 r_rstn = 1;
   #1 r_rstn = 0;
`ifdef SRAM_INIT
   sram_init1.init_sram;
`endif
   repeat (`BENCH_RESET_TIME) @(negedge r_clk);
   r_rstn = 1;
end
 
assign rstn = r_rstn;
 
initial begin
   r_clk = 1'b0;
end
 
always
begin
   #`BENCH_CLK_HALFPERIOD r_clk <= ~r_clk;
end
 
assign clk = r_clk;
 
endmodule