X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/42f57e0294c13f14f8ebcdcc529b5872c2884786..6db28145eacac986d481ceadf7ee9fc1061555fd:/fpga/tests/tb_lp20khz_1MSa_iir_filter.v

diff --git a/fpga/tests/tb_lp20khz_1MSa_iir_filter.v b/fpga/tests/tb_lp20khz_1MSa_iir_filter.v
new file mode 100644
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+++ b/fpga/tests/tb_lp20khz_1MSa_iir_filter.v
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+//-----------------------------------------------------------------------------
+// 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 lp20khz_1MSa_iir_filter
+`include "lp20khz_1MSa_iir_filter.v"
+
+`define FIN "tb_tmp/data.in"
+`define FOUT "tb_tmp/data.filtered"
+
+module lp20khz_1MSa_iir_filter_tb;
+
+	integer fin, fout, r;
+
+	reg clk;
+	reg [7:0] adc_d;
+	wire data_rdy;
+	wire [7:0] adc_filtered;
+
+	initial
+	begin
+		clk = 0;
+		fin = $fopen(`FIN, "r");
+		if (!fin) begin
+			$display("ERROR: can't open the data file");
+			$finish;
+		end
+		fout = $fopen(`FOUT, "w+");
+		if (!$feof(fin))
+			adc_d = $fgetc(fin); // read the first value
+	end
+
+	always
+		# 1 clk = !clk;
+
+	always @(posedge clk)
+		if (data_rdy) begin
+			if ($time > 1)
+				r = $fputc(adc_filtered, fout);				
+			if (!$feof(fin))
+				adc_d <= $fgetc(fin);
+			else begin
+				$fclose(fin);
+				$fclose(fout);
+				$finish;				
+			end
+		end
+
+	// module to test
+	lp20khz_1MSa_iir_filter filter(clk, adc_d, data_rdy, adc_filtered);
+
+endmodule