//////////////////////////////////////////////////////////////////////////////// Copyright (c) 2005 Xilinx, Inc.// This design is confidential and proprietary of Xilinx, All Rights Reserved./////////////////////////////////////////////////////////////////////////////////   ____  ____//  /   /\/   /// /___/  \  / Vendor: Xilinx// \   \   \/ Version: 1.6//  \   \    Application : MIG//  /   /    Filename: ddr_cntl_a_ddr1_test_bench_0.v// /___/   /\ Date Last Modified:  Tue Jul 11 2006// \   \  /  \ Date Created: Mon May 2 2005//  \___\/\___\// Device: Spartan-3/3e// Design Name: DDR1_S3/S3e// Description: This module comprises the command, address and data associated//              with a write and a read command.///////////////////////////////////////////////////////////////////////////////`include "ddr_cntl_a_parameters_0.v"`timescale 1ns/100psmodule    ddr_cntl_a_ddr1_test_bench_0(                           fpga_clk,	               fpga_rst90,	               fpga_rst0,	               fpga_rst180,	               clk90, 	               burst_done,	               INIT_DONE,                     auto_ref_req,	               ar_done,	               u_ack,	               u_data_val,	               u_data_o,	               u_addr,	               u_cmd,	               u_data_i,			u_data_m,	               u_config_parms,	               led_error_output,		       data_valid_out	               	                                      );                          input          fpga_clk;   input          fpga_rst90;   input          fpga_rst0;      input 	  	  fpga_rst180;   input 	        clk90;    input 	        INIT_DONE;   input          ar_done;   input 	        u_ack;   input          u_data_val;         input [(2*`data_width)-1:0]  u_data_o;    input           auto_ref_req;                 output 	       burst_done;   output [((`row_address + `col_ap_width + `bank_address)-1):0]  u_addr;   output [2:0]   u_cmd;     output [(2*`data_width)-1:0] u_data_i;   output [((`data_mask_width*2)-1):0] u_data_m;   output [9:0]   u_config_parms;   output         led_error_output;   output         data_valid_out;       wire           clk;   wire           addr_inc;   wire           addr_rst;   wire           cmd_ack;   wire           cnt_roll;   wire           ctrl_ready;   wire           data_valid;   reg           lfsr_rst_r;   wire           lfsr_rst_w;   wire           r_w;   wire [(2*`data_width)-1:0]   lfsr_data_w;   wire [(2*`data_width)-1:0]   lfsr_data_r;      wire [((`data_mask_width*2)-1):0]  lfsr_data_m_r;   wire [((`data_mask_width*2)-1):0]  lfsr_data_m_w;   wire [((`row_address + `col_ap_width   + `bank_address)-1):0]  addr_out;   wire [6:0]     state;   reg            rst0_r;   reg            rst90_r;   reg            rst180_r;      reg            lfsr_ena_r;   reg            lfsr_ena_w;   reg	       u_dat_flag;   wire	       u_dat_fl;   wire lfsr_rst_r1;//  Input : CONFIG REGISTER FORMAT // config_register = {   EMR(Enable/Disable DLL),//                       BMR (Normal operation/Normal Operation with Reset DLL),//                       BMR/EMR,//                       CAS_latency (3),//                       Burst type ,//                       Burst_length (3) }//// Input : COMMAND REGISTER FORMAT//          000  - NOP//          001  - Precharge //          010  - Auto Refresh//          011  - SElf REfresh//          100  - Write Request//          101  - Load Mode Register//          110  - Read request//          111  - Burst terminate//// Input : Address format//   row address = input address(19 downto 8)//   column addrs = input address( 7 downto 0)//// provide u_cmd// provide u_config_parms////  Terminals assignment //  Input terminalsassign clk         = fpga_clk;assign cmd_ack     = u_ack;assign data_valid  = u_data_val;assign ctrl_ready  = 1'b1;  assign u_addr[((`row_address + `col_ap_width   + `bank_address)-1):0] = addr_out[((`row_address + `col_ap_width   + `bank_address)-1):0];assign u_data_i     = lfsr_data_w;assign u_data_m     = lfsr_data_m_w;assign u_config_parms = {3'b000 , `cas_latency_value ,1'b0, `burst_length} ;always @ (posedge clk)begin  rst0_r <= fpga_rst0;endalways @ (posedge clk90)begin  rst90_r <= fpga_rst90;endalways @ (negedge clk)begin  rst180_r <= fpga_rst180;endalways @ (posedge clk90)   // read lfsr_enabegin  if (rst90_r == 1'b1)     lfsr_ena_r <= 1'b0;  else if (u_data_val == 1'b1)      lfsr_ena_r <= 1'b1;  else     lfsr_ena_r <= 1'b0;endalways @ (posedge clk90)    // write lfsr_enabegin  if (rst90_r == 1'b1)     lfsr_ena_w <= 1'b0;  else if ((r_w == 1'b0) && (u_ack == 1'b1))     lfsr_ena_w <= 1'b1;  else     lfsr_ena_w <= 1'b0;endalways@(posedge clk90)begin if(rst90_r == 1'b1)	u_dat_flag <= 1'b0; else	u_dat_flag  <= cmd_ack;endassign u_dat_fl = cmd_ack && !u_dat_flag && r_w ;assign lfsr_rst_r1 = u_dat_fl ;always@(posedge clk90)begin if(rst90_r == 1'b1)	 lfsr_rst_r <= 1'b0; else	 lfsr_rst_r <= lfsr_rst_r1; end ddr_cntl_a_addr_gen_0 INST1  (                  .clk(~clk),                  .rst(rst180_r),                  .addr_rst(addr_rst),                  .addr_inc(addr_inc),                  .addr_out(addr_out),                  .test_cnt_ena(ctrl_ready),                  .burst_done(burst_done),                  .cnt_roll(cnt_roll)                  );                  ddr_cntl_a_cmd_fsm_0   INST_2  (                   .clk(clk),                  .clk90(clk90),	           .cmd_ack(cmd_ack),                  .cnt_roll(cnt_roll),                  .r_w(r_w),                  .refresh_done(ar_done),                  .rst(rst0_r),                  .rst90(rst90_r),                  .rst180(rst180_r),                  .init_val(INIT_DONE),                  .u_data_val(u_data_val),                  .addr_inc(addr_inc),                  .addr_rst(addr_rst),                  .u_cmd(u_cmd),                  .init_counter(state),                  .lfsr_rst(lfsr_rst_w)                  );ddr_cntl_a_cmp_data_0	INST3	(                   .clk(clk90),                  .data_valid(data_valid),                  .lfsr_data(lfsr_data_r),                  .read_data(u_data_o),                  .rst(rst90_r),                  .led_error_output(led_error_output),		  .data_valid_out(data_valid_out)                                    );ddr_cntl_a_lfsr32_0	INST5	(                 .clk(clk90),                .rst(rst90_r),                .lfsr_rst(lfsr_rst_r),                .lfsr_ena(lfsr_ena_r),                .lfsr_data_m(lfsr_data_m_r),                .lfsr_out(lfsr_data_r)                );                ddr_cntl_a_lfsr32_0	INST7	(                 .clk(clk90),                .rst(rst90_r),                .lfsr_rst(lfsr_rst_w),                .lfsr_ena(lfsr_ena_w),                .lfsr_data_m(lfsr_data_m_w),                .lfsr_out(lfsr_data_w)                );                endmodule