--- /dev/null
+//-----------------------------------------------------------------------------
+// Copyright (C) 2014 iZsh <izsh at fail0verflow.com>
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// testbench for min_max_tracker
+`include "min_max_tracker.v"
+
+`define FIN "tb_tmp/data.filtered.gold"
+`define FOUT_MIN "tb_tmp/data.min"
+`define FOUT_MAX "tb_tmp/data.max"
+
+module min_max_tracker_tb;
+
+ integer fin;
+ integer fout_min, fout_max;
+ integer r;
+
+ reg clk;
+ reg [7:0] adc_d;
+ wire [7:0] min;
+ wire [7:0] max;
+
+ initial
+ begin
+ clk = 0;
+ fin = $fopen(`FIN, "r");
+ if (!fin) begin
+ $display("ERROR: can't open the data file");
+ $finish;
+ end
+ fout_min = $fopen(`FOUT_MIN, "w+");
+ fout_max = $fopen(`FOUT_MAX, "w+");
+ if (!$feof(fin))
+ adc_d = $fgetc(fin); // read the first value
+ end
+
+ always
+ # 1 clk = !clk;
+
+ // input
+ initial
+ begin
+ while (!$feof(fin)) begin
+ @(negedge clk) adc_d <= $fgetc(fin);
+ end
+
+ if ($feof(fin))
+ begin
+ # 3 $fclose(fin);
+ $fclose(fout_min);
+ $fclose(fout_max);
+ $finish;
+ end
+ end
+
+ initial
+ begin
+ // $monitor("%d\t min: %x, max: %x", $time, min, max);
+ end
+
+ // output
+ always @(negedge clk)
+ if ($time > 2) begin
+ r = $fputc(min, fout_min);
+ r = $fputc(max, fout_max);
+ end
+
+ // module to test
+ min_max_tracker tracker(clk, adc_d, 8'd127, min, max);
+
+endmodule
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