memory_tb.v

   1 // Atosm Chip
   2 // Copyright (C) 2008 Tomasz Malesinski <tmal@mimuw.edu.pl>
   3 //
   4 // This program is free software; you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation; either version 2 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with this program; if not, write to the Free Software
  16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18 `include "memory.v"
  19
  20 module ram_tb();
  21    reg        clk_o;
  22    reg [15:0] adr_o;
  23    reg [7:0]  dat_o;
  24    reg        rst_o;
  25    reg        stb_o;
  26    reg        we_o;
  27
  28    wire       ack_i;
  29    wire [7:0] dat_i;
  30
  31    initial begin
  32       $readmemh("rom.list", u_memory.u_rom.memory);
  33
  34       $display("time\t clk rst stb we  adr              do       di");
  35       $monitor("%g\t %b   %b   %b   %b   %b %b %b",
  36                $time, clk_o, rst_o, stb_o, we_o, adr_o, dat_o, dat_i);
  37       clk_o = 1;
  38       rst_o = 0;
  39       stb_o = 0;
  40       we_o = 0;
  41       #5 rst_o = 1;
  42
  43       #10 rst_o = 0;
  44       we_o = 1;
  45       stb_o = 1;
  46       adr_o = 'h10;
  47       dat_o = 'h55;
  48
  49       #10 adr_o = 'h20;
  50       dat_o = 'haa;
  51
  52       #10 we_o = 0;
  53       adr_o = 'h10;
  54
  55       #10 adr_o = 'h20;
  56
  57       #10 adr_o = 'hfc00;
  58       #10 adr_o = 'hfc01;
  59       #10 adr_o = 'hfc02;
  60       #10 adr_o = 'hfc03;
  61       #10 adr_o = 'hfc04;
  62
  63       #10 $finish;
  64    end
  65
  66    always begin
  67       #5 clk_o = ~clk_o;
  68    end
  69
  70    memory u_memory(.clk_i(clk_o),
  71                    .adr_i(adr_o),
  72                    .dat_i(dat_o),
  73                    .rst_i(rst_o),
  74                    .stb_i(stb_o),
  75                    .we_i(we_o),
  76                    .ack_o(ack_i),
  77                    .dat_o(dat_i));
  78
  79 endmodule // ram_tb