//----------------------------------------------------------------------------- // 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