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

////                                                              ////

////  8051 top level test bench                                   ////

////                                                              ////

////  This file is part of the 8051 cores project                 ////

////  http://www.opencores.org/cores/8051/                        ////

////                                                              ////

////  Description                                                 ////

////   top level test bench.                                      ////

////                                                              ////

////  To Do:                                                      ////

////   nothing                                                    ////

////                                                              ////

////  Author(s):                                                  ////

////      - Simon Teran, simont@opencores.org                     ////

////                                                              ////

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

////                                                              ////

//// Copyright (C) 2000 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                     ////

////                                                              ////

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

//

// CVS Revision History

//

// $Log: not supported by cvs2svn $

// Revision 1.14  2003/06/05 12:54:38  simont

// remove dumpvars.

//

// Revision 1.13  2003/06/05 11:13:39  simont

// add FREQ paremeter.

//

// Revision 1.12  2003/04/16 09:55:56  simont

// add support for external rom from xilinx ramb4

//

// Revision 1.11  2003/04/10 12:45:06  simont

// defines for pherypherals added

//

// Revision 1.10  2003/04/03 19:20:55  simont

// Remove instruction cache and wb_interface

//

// Revision 1.9  2003/04/02 15:08:59  simont

// rename signals

//

// Revision 1.8  2003/01/13 14:35:25  simont

// remove wb_bus_mon

//

// Revision 1.7  2002/10/28 16:43:12  simont

// add module oc8051_wb_iinterface

//

// Revision 1.6  2002/10/24 13:36:53  simont

// add instruction cache and DELAY parameters for external ram, rom

//

// Revision 1.5  2002/10/17 19:00:50  simont

// add external rom

//

// Revision 1.4  2002/09/30 17:33:58  simont

// prepared header

//

//

// synopsys translate_off

`include "oc8051_timescale.v"

// synopsys translate_on

`include "oc8051_defines.v"

module oc8051_tb;

//parameter FREQ  = 20000; // frequency in kHz

parameter FREQ  = 12000; // frequency in kHz

parameter DELAY = 500000/FREQ;

reg  rst, clk;

reg  [7:0] p0_in, p1_in, p2_in;

wire [15:0] ext_addr, iadr_o;

wire write, write_xram, write_uart, txd, rxd, int_uart, int0, int1, t0, t1, bit_out, stb_o, ack_i;

wire ack_xram, ack_uart, cyc_o, iack_i, istb_o, icyc_o, t2, t2ex;

wire [7:0] data_in, data_out, p0_out, p1_out, p2_out, p3_out, data_out_uart, data_out_xram, p3_in;

wire wbi_err_i, wbd_err_i;

`ifdef OC8051_XILINX_RAMB

  reg  [31:0] idat_i;

`else

  wire [31:0] idat_i;

`endif

///

/// buffer for test vectors

///

//

// buffer

reg [23:0] buff [0:255];

reg ea [0:1];

integer num;

assign wbd_err_i = 1'b0;

assign wbi_err_i = 1'b0;

//

// oc8051 controller

//

oc8051_top oc8051_top_1(.wb_rst_i(rst), .wb_clk_i(clk),

         .int0_i(int0), .int1_i(int1),

         .wbd_dat_i(data_in), .wbd_we_o(write), .wbd_dat_o(data_out),

         .wbd_adr_o(ext_addr), .wbd_err_i(wbd_err_i),

         .wbd_ack_i(ack_i), .wbd_stb_o(stb_o), .wbd_cyc_o(cyc_o),

         .wbi_adr_o(iadr_o), .wbi_stb_o(istb_o), .wbi_ack_i(iack_i),

         .wbi_cyc_o(icyc_o), .wbi_dat_i(idat_i), .wbi_err_i(wbi_err_i),

  `ifdef OC8051_PORTS

   `ifdef OC8051_PORT0

         .p0_i(p0_in),

         .p0_o(p0_out),

   `endif

   `ifdef OC8051_PORT1

         .p1_i(p1_in),

         .p1_o(p1_out),

   `endif

   `ifdef OC8051_PORT2

         .p2_i(p2_in),

         .p2_o(p2_out),

   `endif

   `ifdef OC8051_PORT3

         .p3_i(p3_in),

         .p3_o(p3_out),

   `endif

  `endif

   `ifdef OC8051_UART

         .rxd_i(rxd), .txd_o(txd),

   `endif

   `ifdef OC8051_TC01

         .t0_i(t0), .t1_i(t1),

   `endif

   `ifdef OC8051_TC2

         .t2_i(t2), .t2ex_i(t2ex),

   `endif

         .ea_in(ea[0]));

//

// external data ram

//

oc8051_xram oc8051_xram1 (.clk(clk), .rst(rst), .wr(write_xram), .addr(ext_addr), .data_in(data_out), .data_out(data_out_xram), .ack(ack_xram), .stb(stb_o));

defparam oc8051_xram1.DELAY = 2;

`ifdef OC8051_SERIAL

//

// test programs with serial interface

//

oc8051_serial oc8051_serial1(.clk(clk), .rst(rst), .rxd(txd), .txd(rxd));

defparam oc8051_serial1.FREQ  = FREQ;

//defparam oc8051_serial1.BRATE = 9.6;

defparam oc8051_serial1.BRATE = 4.8;

`else

//

// external uart

//

oc8051_uart_test oc8051_uart_test1(.clk(clk), .rst(rst), .addr(ext_addr[7:0]), .wr(write_uart),

                  .wr_bit(p3_out[0]), .data_in(data_out), .data_out(data_out_uart), .bit_out(bit_out), .rxd(txd),

                  .txd(rxd), .ow(p3_out[1]), .intr(int_uart), .stb(stb_o), .ack(ack_uart));

`endif

`ifdef OC8051_XILINX_RAMB

`include "oc8051_rom_values.v"

//

// exteranl program rom

//

//

// rom 0

//

wire [11:0] adr0, adr1;

wire [15:0] dat0, dat1;

assign adr0 = iadr_o[13:2] + {11'h0, iadr_o[1]};

assign adr1 = iadr_o[13:2];

rom_8kx16_top rom_8kx16_top_0

(

  // WISHBONE slave

  .wb_clk_i(clk),

  .wb_rst_i(rst),

  .wb_dat_i(16'h0),

  .wb_dat_o(dat0),

  .wb_adr_i(adr0),

  .wb_sel_i(2'b11),

  .wb_we_i(1'b0),

  .wb_cyc_i(icyc_o),

  .wb_stb_i(istb_o),

  .wb_ack_o(iack_i),

  .wb_err_o(wbi_err_i)

);

rom_8kx16_top rom_8kx16_top_1

(

  // WISHBONE slave

  .wb_clk_i(clk),

  .wb_rst_i(rst),

  .wb_dat_i(16'h0),

  .wb_dat_o(dat1),

  .wb_adr_i(adr1),

  .wb_sel_i(2'b11),

  .wb_we_i(1'b0),

  .wb_cyc_i(icyc_o),

  .wb_stb_i(istb_o),

  .wb_ack_o(iack_i),

  .wb_err_o(wbi_err_i)

);

defparam  rom_8kx16_top_0.awidth = 12;

defparam  rom_8kx16_top_1.awidth = 12;

always @(iadr_o[1:0] or dat0 or dat1)

begin

  case (iadr_o[1:0])

    2'b00: idat_i = {8'h0, dat1[7:0], dat0};

    2'b01: idat_i = {8'h0, dat1, dat0[15:8]};

    2'b10: idat_i = {8'h0, dat0[7:0], dat1};

    default: idat_i = {8'h0, dat0, dat1[15:8]};

  endcase

end

`else

  oc8051_xrom oc8051_xrom1(.rst(rst), .clk(clk), .addr(iadr_o), .data(idat_i),

               .stb_i(istb_o), .cyc_i(icyc_o), .ack_o(iack_i));

   defparam oc8051_xrom1.DELAY = 0;

`endif

//

//

//

assign write_xram = p3_out[7] & write;

assign write_uart = !p3_out[7] & write;

assign data_in = p3_out[7] ? data_out_xram : data_out_uart;

assign ack_i = p3_out[7] ? ack_xram : ack_uart;

assign p3_in = {6'h0, bit_out, int_uart};

assign t0 = p3_out[5];

assign t1 = p3_out[6];

assign int0 = p3_out[3];

assign int1 = p3_out[4];

assign t2 = p3_out[5];

assign t2ex = p3_out[2];

initial begin

  rst= 1'b1;

  p0_in = 8'h00;

  p1_in = 8'h00;

  p2_in = 8'h00;

#220

  rst = 1'b0;

#80000000

  $display("time ",$time, "\n faulire: end of time\n \n");

  $finish;

end

initial

begin

  clk = 0;

  forever #DELAY clk <= ~clk;

end

always @(ext_addr or write or stb_o or data_out)

begin

  if ((ext_addr==16'h0010) & write & stb_o) begin

    if (data_out==8'h7f) begin

      $display("");

      $display("time ",$time, " Passed");

      $finish;

    end else begin

      $display("");

      $display("time ",$time," Error: %h", data_out);

      $finish;

    end

  end

end

endmodule