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//////////////////////////////////////////////////////////////////////
///                                                               //// 
/// ORPSoC testbench                                              ////
///                                                               ////
/// Instantiate ORPSoC, monitors, provide stimulus                ////
///                                                               ////
/// Julius Baxter, julius@opencores.org                           ////
///                                                               ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2009, 2010 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                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
 
`include "orpsoc-defines.v"
`include "orpsoc-testbench-defines.v"
`include "test-defines.v"
 
`include "timescale.v"
 
module orpsoc_testbench;
 
   reg clk = 0;
   reg rst_n = 1; // Active LOW
 
   always
     #((`BOARD_CLOCK_PERIOD)/2) clk <= ~clk;
 
   // Reset, ACTIVE LOW
   initial 
     begin
	#1;
	repeat (32) @(negedge clk)
	  rst_n <= 1;
	repeat (32) @(negedge clk)
	  rst_n <= 0;
	repeat (32) @(negedge clk)
	  rst_n <= 1;
     end
 
`include "orpsoc-params.v"
 
`ifdef JTAG_DEBUG
   wire 		     tdo_pad_o;
   wire 		     tck_pad_i;
   wire 		     tms_pad_i;
   wire 		     tdi_pad_i;
`endif   
`ifdef UART0
   wire 		     uart0_stx_pad_o;
   wire 		     uart0_srx_pad_i;
`endif
 
   orpsoc_top dut
     (
      .clk_pad_i                        (clk),
`ifdef JTAG_DEBUG          
      .tms_pad_i			(tms_pad_i),
      .tck_pad_i			(tck_pad_i),
      .tdi_pad_i			(tdi_pad_i),
      .tdo_pad_o			(tdo_pad_o),
`endif      
`ifdef UART0      
      .uart0_stx_pad_o			(uart0_stx_pad_o),
      .uart0_srx_pad_i			(uart0_srx_pad_i),
`endif
      .rst_n_pad_i			(rst_n)
      );
 
   //
   // Instantiate OR1200 monitor
   //
   or1200_monitor monitor();
 
`ifndef SIM_QUIET
 `define CPU_ic_top or1200_ic_top
 `define CPU_dc_top or1200_dc_top
   wire ic_en = orpsoc_testbench.dut.or1200_top0.or1200_ic_top.ic_en;
   always @(posedge ic_en)
     $display("Or1200 IC enabled at %t", $time);
 
   wire dc_en = orpsoc_testbench.dut.or1200_top0.or1200_dc_top.dc_en;
   always @(posedge dc_en)
     $display("Or1200 DC enabled at %t", $time);
`endif
 
 
`ifdef JTAG_DEBUG   
 `ifdef VPI_DEBUG
   // Debugging interface
   vpi_debug_module vpi_dbg
     (
      .tms(tms_pad_i), 
      .tck(tck_pad_i), 
      .tdi(tdi_pad_i), 
      .tdo(tdo_pad_o)
      );
 `else   
   // If no VPI debugging, tie off JTAG inputs
   assign tdi_pad_i = 1;
   assign tck_pad_i = 0;
   assign tms_pad_i = 1;
 `endif // !`ifdef VPI_DEBUG_ENABLE
`endif //  `ifdef JTAG_DEBUG
 
 
   initial 
     begin
`ifndef SIM_QUIET
	$display("\n* Starting simulation of ORPSoC RTL.\n* Test: %s\n",
		 `TEST_NAME_STRING );
`endif	
 
`ifdef VCD
 `ifdef VCD_DELAY
	#(`VCD_DELAY);   
 `endif
 
	// Delay by x insns
 `ifdef VCD_DELAY_INSNS
	#10; // Delay until after the value becomes valid
	while (monitor.insns < `VCD_DELAY_INSNS)
	  @(posedge clk);
 `endif	
 
 `ifdef SIMULATOR_MODELSIM
	// Modelsim can GZip VCDs on the fly if given in the suffix
  `define VCD_SUFFIX   ".vcd.gz"
 `else
  `define VCD_SUFFIX   ".vcd"
 `endif
 
`ifndef SIM_QUIET
	$display("* VCD in %s\n", {"../out/",`TEST_NAME_STRING,`VCD_SUFFIX});
`endif	
	$dumpfile({"../out/",`TEST_NAME_STRING,`VCD_SUFFIX});
 `ifndef VCD_DEPTH
  `define VCD_DEPTH 0
 `endif     
	$dumpvars(`VCD_DEPTH);
`endif
 
   end // initial begin
 
`ifdef END_TIME
   initial begin
      #(`END_TIME);
`ifndef SIM_QUIET      
      $display("* Finish simulation due to END_TIME being set at %t", $time);
`endif      
      $finish;
   end
`endif
 
`ifdef END_INSNS
   initial begin
      #10
	while (monitor.insns < `END_INSNS)
	  @(posedge clk);
 `ifndef SIM_QUIET      
      $display("* Finish simulation due to END_INSNS count (%d) reached at %t",
	       `END_INSNS, $time);
 `endif
      $finish;
   end
`endif     
 
`ifdef UART0   
   //	
   // UART0 decoder
   //   
   uart_decoder
     #( 
	.uart_baudrate_period_ns(8680) // 115200 baud = period 8.68uS
	)
   uart0_decoder
     (
      .clk(clk),
      .uart_tx(uart0_stx_pad_o)
      );
 
   // UART0 stimulus
   /*
   uart_stim
     #( 
	.uart_baudrate_period_ns(8680) // 115200 baud = period 8.68uS
	)
   uart0_stim
     (
      .clk(clk),
      .uart_rx(uart0_srx_pad_i)
      );
    */
   // UART0 is looped back for now
   assign uart0_srx_pad_i = uart0_stx_pad_o;
 
`endif //  `ifdef UART0
 
endmodule // orpsoc_testbench
 
// Local Variables:
// verilog-library-directories:("." "../../rtl/verilog/orpsoc_top")
// verilog-library-files:()
// verilog-library-extensions:(".v" ".h")
// End: