Merge remote-tracking branch 'origin/master' into iclass-fixes

[proxmark3-svn] / fpga / tests / tb_lf_edge_detect.v

diff --git a/fpga/tests/tb_lf_edge_detect.v b/fpga/tests/tb_lf_edge_detect.v
new file mode 100644 (file)
index 0000000..a9fccf8
--- /dev/null
+++ b/fpga/tests/tb_lf_edge_detect.v
@@ -0,0 +1,111 @@
+//-----------------------------------------------------------------------------
+// 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 lf_edge_detect
+`include "lf_edge_detect.v"
+
+`define FIN "tb_tmp/data.filtered.gold"
+`define FOUT_MIN "tb_tmp/data.min"
+`define FOUT_MAX "tb_tmp/data.max"
+`define FOUT_STATE "tb_tmp/data.state"
+`define FOUT_TOGGLE "tb_tmp/data.toggle"
+`define FOUT_HIGH "tb_tmp/data.high"
+`define FOUT_HIGHZ "tb_tmp/data.highz"
+`define FOUT_LOWZ "tb_tmp/data.lowz"
+`define FOUT_LOW "tb_tmp/data.low"
+
+module lf_edge_detect_tb;
+
+       integer fin, fout_state, fout_toggle;
+       integer fout_high, fout_highz, fout_lowz, fout_low, fout_min, fout_max;
+       integer r;
+
+       reg clk = 0;
+       reg [7:0] adc_d;
+       wire adc_clk;
+       wire data_rdy;
+       wire edge_state;
+       wire edge_toggle;
+
+    wire [7:0] high_threshold;
+    wire [7:0] highz_threshold;
+    wire [7:0] lowz_threshold;
+    wire [7:0] low_threshold;
+    wire [7:0] max;
+    wire [7:0] min;
+
+       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+");             
+               fout_state = $fopen(`FOUT_STATE, "w+");         
+               fout_toggle = $fopen(`FOUT_TOGGLE, "w+");               
+               fout_high = $fopen(`FOUT_HIGH, "w+");           
+               fout_highz = $fopen(`FOUT_HIGHZ, "w+");         
+               fout_lowz = $fopen(`FOUT_LOWZ, "w+");           
+               fout_low = $fopen(`FOUT_LOW, "w+");             
+               if (!$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_state);
+                       $fclose(fout_toggle);
+                       $fclose(fout_high);
+                       $fclose(fout_highz);
+                       $fclose(fout_lowz);
+                       $fclose(fout_low);
+                       $fclose(fout_min);
+                       $fclose(fout_max);
+                       $finish;
+               end
+       end
+
+       initial
+       begin
+               // $monitor("%d\t S: %b, E: %b", $time, edge_state, edge_toggle);
+       end
+
+       // output
+       always @(negedge clk)
+       if ($time > 2) begin
+               r = $fputc(min, fout_min);
+               r = $fputc(max, fout_max);
+               r = $fputc(edge_state, fout_state);
+               r = $fputc(edge_toggle, fout_toggle);
+               r = $fputc(high_threshold, fout_high);
+               r = $fputc(highz_threshold, fout_highz);
+               r = $fputc(lowz_threshold, fout_lowz);
+               r = $fputc(low_threshold, fout_low);
+       end
+
+       // module to test
+       lf_edge_detect detect(clk, adc_d, 8'd127,
+               max, min,
+               high_threshold, highz_threshold,
+               lowz_threshold, low_threshold,
+               edge_state, edge_toggle);
+
+endmodule
\ No newline at end of file