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

////                                                              ////

////  ORPSoC Testbench                                            ////

////                                                              ////

////  Description                                                 ////

////  ORPSoC Testbench file                                       ////

////                                                              ////

////  To Do:                                                      ////

////                                                              ////

////                                                              ////

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

////      - jb, jb@orsoc.se                                       ////

////                                                              ////

////                                                              ////

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

////                                                              ////

//// Copyright (C) 2009 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 "timescale.v"

`include "orpsoc_testbench_defines.v"

module orpsoc_testbench();

   reg clk;

   reg rst;

   // Setup global clock. Period defined in orpsoc_testbench_defines.v

   initial

     begin

        clk <= 0;

        rst <= 1;

     end

   always

     begin

        #((`CLOCK_PERIOD)/2) clk <= ~clk;

     end

   // Assert rst and then bring it low again

   initial

     begin

        repeat (2) @(negedge clk);

        rst <= 0;

        repeat (16) @(negedge clk);

        rst <= 1;

     end

   // Wires for the dut

   wire spi_sd_sclk_o;

   wire spi_sd_ss_o;

   wire spi_sd_miso_i;

   wire spi_sd_mosi_o;

`ifdef USE_SDRAM

   wire [15:0] mem_dat_io;

   wire [12:0] mem_adr_o;

   wire [1:0]  mem_dqm_o;

   wire [1:0]  mem_ba_o;

   wire        mem_cs_o;

   wire        mem_ras_o;

   wire        mem_cas_o;

   wire        mem_we_o;

   wire        mem_cke_o;

   wire        spi_flash_sclk_o;

   wire        spi_flash_ss_o;

   wire        spi_flash_miso_i;

   wire        spi_flash_mosi_o;

   wire        spi_flash_w_n_o;

   wire        spi_flash_hold_n_o;

`endif //  `ifdef USE_SDRAM

`ifdef USE_ETHERNET

   wire [1:1]  eth_sync_o;

   wire [1:1] eth_tx_o;

   wire [1:1] eth_rx_i;

   wire       eth_clk_i;

   wire [1:1] eth_md_io;

   wire [1:1] eth_mdc_o;

`endif

   wire       spi1_mosi_o;

   wire       spi1_miso_i;

   wire       spi1_ss_o;

   wire       spi1_sclk_o;

   wire [8-1:0] gpio_a_io;

   wire         uart0_srx_i;

   wire         uart0_stx_o;

   wire         dbg_tdi_i;

   wire         dbg_tck_i;

   wire         dbg_tms_i;

   wire         dbg_tdo_o;

   wire         rst_i;

   wire         rst_o;

   wire         clk_i;

   assign clk_i = clk;

   assign rst_i = rst;

   // Tie off some inputs   

   assign spi1_miso_i = 0;

   assign uart0_srx_i = 1;

   orpsoc_top dut

     (

      // Outputs

      .spi_sd_sclk_pad_o                        (spi_sd_sclk_o),

      .spi_sd_ss_pad_o                  (spi_sd_ss_o),

      .spi_sd_mosi_pad_o                        (spi_sd_mosi_o),

      .spi1_mosi_pad_o                  (spi1_mosi_o),

      .spi1_ss_pad_o                    (spi1_ss_o),

      .spi1_sclk_pad_o                  (spi1_sclk_o),

      .uart0_stx_pad_o                  (uart0_stx_o),

      .dbg_tdo_pad_o                    (dbg_tdo_o),

      .rst_pad_o                                (rst_o),

      .gpio_a_pad_io                    (gpio_a_io[8-1:0]),

      // Inputs

      .spi_sd_miso_pad_i                        (spi_sd_miso_i),

      .spi1_miso_pad_i                  (spi1_miso_i),

      .uart0_srx_pad_i                  (uart0_srx_i),

      .dbg_tdi_pad_i                    (dbg_tdi_i),

      .dbg_tck_pad_i                    (dbg_tck_i),

      .dbg_tms_pad_i                    (dbg_tms_i),

`ifdef USE_ETHERNET

      // Ethernet ports

      .eth_md_pad_io                    (eth_md_io[1:1]),

      .eth_mdc_pad_o                    (eth_mdc_o[1:1]),

      .eth_sync_pad_o                   (eth_sync_o[1:1]),

      .eth_tx_pad_o                     (eth_tx_o[1:1]),

      .eth_rx_pad_i                     (eth_rx_i[1:1]),

      .eth_clk_pad_i                    (eth_clk_i),

`endif  //  `ifdef USE_ETHERNET      

      // SDRAM and flash memory ports

`ifdef USE_SDRAM

      .mem_dat_pad_io                   (mem_dat_io[15:0]),

      .mem_adr_pad_o                    (mem_adr_o[12:0]),

      .mem_dqm_pad_o                    (mem_dqm_o[1:0]),

      .mem_ba_pad_o                     (mem_ba_o[1:0]),

      .mem_cs_pad_o                     (mem_cs_o),

      .mem_ras_pad_o                    (mem_ras_o),

      .mem_cas_pad_o                    (mem_cas_o),

      .mem_we_pad_o                     (mem_we_o),

      .mem_cke_pad_o                    (mem_cke_o),

      .spi_flash_sclk_pad_o             (spi_flash_sclk_o),

      .spi_flash_ss_pad_o                       (spi_flash_ss_o),

      .spi_flash_mosi_pad_o             (spi_flash_mosi_o),

      .spi_flash_w_n_pad_o                      (spi_flash_w_n_o),

      .spi_flash_hold_n_pad_o           (spi_flash_hold_n_o),

      .spi_flash_miso_pad_i             (spi_flash_miso_i),

`endif

      .rst_pad_i                                (rst_i),

      .clk_pad_i                                (clk_i));

`ifdef VPI_DEBUG_ENABLE

   // Debugging interface

   vpi_debug_module vpi_dbg(

                            .tms(dbg_tms_i),

                            .tck(dbg_tck_i),

                            .tdi(dbg_tdi_i),

                            .tdo(dbg_tdo_o));

`else

   // If no VPI debugging, tie off JTAG inputs

   assign dbg_tdi_i = 1;

   assign dbg_tck_i = 0;

   assign dbg_tms_i = 1;

`endif

   // External memories, if enabled

`ifdef USE_SDRAM

   // SPI Flash

   AT26DFxxx spi_flash

     (

      // Outputs

      .SO                                       (spi_flash_miso_i),

      // Inputs

      .CSB                                      (spi_flash_ss_o),

      .SCK                                      (spi_flash_sclk_o),

      .SI                                       (spi_flash_mosi_o),

      .WPB                                      (spi_flash_w_n_o)

      //.HOLDB                          (spi_flash_hold_n_o)

      );

   // SDRAM

   mt48lc16m16a2 sdram

     (

      // Inouts

      .Dq                                       (mem_dat_io),

      // Inputs

      .Addr                             (mem_adr_o),

      .Ba                                       (mem_ba_o),

      .Clk                                      (clk_i),

      .Cke                                      (mem_cke_o),

      .Cs_n                             (mem_cs_o),

      .Ras_n                            (mem_ras_o),

      .Cas_n                            (mem_cas_o),

      .We_n                             (mem_we_o),

      .Dqm                                      (mem_dqm_o));

`endif // !`ifdef USE_SDRAM

`ifdef USE_ETHERNET

   reg          eth_clk;

   initial

     eth_clk <= 0;

   always

     #(8/2) eth_clk <= ~eth_clk; // 125 Mhz clock

   assign eth_clk_i = eth_clk;

   wire [3:0]            ethphy_mii_tx_d;

   wire                 ethphy_mii_tx_en;

   wire                 ethphy_mii_tx_err;

   wire                 mcoll_o;

   wire                 mcrs_o;

   wire                 md_io;

   wire                 mrx_clk_o;

   wire [3:0]            mrxd_o;

   wire                 mrxdv_o;

   wire                 mrxerr_o;

   wire                 mtx_clk_o;

   wire                 smii_rx;

   wire                 fast_ethernet, duplex, link;

   /* Converts SMII back to MII */

   smii_phy smii_phyend

     (

      // Outputs

      .smii_rx                          (eth_rx_i[1:1]), /* SMII RX */

      .ethphy_mii_tx_d                  (ethphy_mii_tx_d[3:0]), /* MII TX */

      .ethphy_mii_tx_en                 (ethphy_mii_tx_en),     /* MII TX */

      .ethphy_mii_tx_err                (ethphy_mii_tx_err),    /* MII TX */

      // Inputs

      .smii_tx                          (eth_tx_o[1:1]),        /* SMII TX */

      .smii_sync                        (eth_sync_o[1:1]),      /* SMII SYNC */

      .ethphy_mii_tx_clk                (mtx_clk_o),            /* MII TX */

      .ethphy_mii_rx_d                  (mrxd_o[3:0]), /* MII RX */

      .ethphy_mii_rx_dv                 (mrxdv_o),     /* MII RX */

      .ethphy_mii_rx_err                (mrxerr_o),    /* MII RX */

      .ethphy_mii_rx_clk                (mrx_clk_o),   /* MII RX */

      .ethphy_mii_mcoll                 (),

      .ethphy_mii_crs                   (mcrs_o),

      .fast_ethernet                    (fast_ethernet),

      .duplex                           (duplex),

      .link                             (link),

      .clk                              (eth_clk_i),

      .rst_n                            (rst_i));

`ifdef ENABLE_ETH_STIM

   /* Generates an RX packet */

 `include "eth_stim.v"

`endif

   eth_phy eth_phy0

     (

      // Outputs

      .mtx_clk_o                        (mtx_clk_o),

      .mrx_clk_o                        (mrx_clk_o),

      .mrxd_o                           (mrxd_o[3:0]),

      .mrxdv_o                          (mrxdv_o),

      .mrxerr_o                         (mrxerr_o),

      .mcoll_o                          (mcoll_o),

      .mcrs_o                           (mcrs_o),

      // Sideband outputs for smii converter --jb

      .link_o                             (link),

      .speed_o                            (fast_ethernet),

      .duplex_o                           (duplex),

      // Inouts

      .md_io                            (eth_md_io[1:1]),

      // Inputs

      .m_rst_n_i                        (rst_i),

      .mtxd_i                           (ethphy_mii_tx_d[3:0]),

      .mtxen_i                          (ethphy_mii_tx_en),

      .mtxerr_i                         (ethphy_mii_tx_err),

      .mdc_i                            (eth_mdc_o[1:1]));

`endif //  `ifdef USE_ETHERNET

initial

  begin

     $display("\nStarting RTL simulation of %s test\n", `TEST_NAME_STRING);

`ifdef USE_SDRAM

     $display("Using SDRAM - loading application from SPI flash memory\n");

`endif

`ifdef VCD

     $display("VCD in %s\n", {`TEST_RESULTS_DIR,`TEST_NAME_STRING,".vcd"});

     $dumpfile({`TEST_RESULTS_DIR,`TEST_NAME_STRING,".vcd"});

     $dumpvars(0);

`endif

  end

   // Instantiate the monitor

   or1200_monitor monitor();

   // If we're using UART for printf output, include the

   // UART decoder

`ifdef UART_PRINTF

   // Define the UART's txt line for it to listen to

 `define UART_TX_LINE uart0_stx_o

 `define UART_BAUDRATE 115200

 `include "uart_decoder.v"

`endif

endmodule // orpsoc_testbench

// Local Variables:

// verilog-library-files:("../../rtl/verilog/orpsoc_top.v")

// verilog-library-directories:("." "../../rtl/verilog")

// End: