From 783c33e2685c06e4f1d95ffef3c29585b2a01ca7 Mon Sep 17 00:00:00 2001
From: Konstantin Pavlov <pavlovconst@gmail.com>
Date: Thu, 16 Jun 2022 06:57:56 +0300
Subject: [PATCH] Updated testbench template project

---
 .../testbench_template_tb/c_rand.v            | 48 -------------------
 .../testbench_template_tb/compile.tcl         |  9 ++--
 .../testbench_template_tb/main_tb.sv          | 42 ++++++++--------
 3 files changed, 23 insertions(+), 76 deletions(-)
 delete mode 100755 example_projects/testbench_template_tb/c_rand.v

diff --git a/example_projects/testbench_template_tb/c_rand.v b/example_projects/testbench_template_tb/c_rand.v
deleted file mode 100755
index e3e5574..0000000
--- a/example_projects/testbench_template_tb/c_rand.v
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2007 Altera Corporation. All rights reserved.  
-// Altera products are protected under numerous U.S. and foreign patents, 
-// maskwork rights, copyrights and other intellectual property laws.  
-//
-// This reference design file, and your use thereof, is subject to and governed
-// by the terms and conditions of the applicable Altera Reference Design 
-// License Agreement (either as signed by you or found at www.altera.com).  By
-// using this reference design file, you indicate your acceptance of such terms
-// and conditions between you and Altera Corporation.  In the event that you do
-// not agree with such terms and conditions, you may not use the reference 
-// design file and please promptly destroy any copies you have made.
-//
-// This reference design file is being provided on an "as-is" basis and as an 
-// accommodation and therefore all warranties, representations or guarantees of 
-// any kind (whether express, implied or statutory) including, without 
-// limitation, warranties of merchantability, non-infringement, or fitness for
-// a particular purpose, are specifically disclaimed.  By making this reference
-// design file available, Altera expressly does not recommend, suggest or 
-// require that this reference design file be used in combination with any 
-// other product not provided by Altera.
-/////////////////////////////////////////////////////////////////////////////
-
-// C runtime library random number generator
-//
-// uses 32 logic cells for DFF/ADD and 8 DSP blocks for the
-// 32x18=>32 multiply
-
-module c_rand (clk,rst,reseed,seed_val,out);
-input clk,rst,reseed;
-input [31:0] seed_val;
-output [15:0] out;
-wire [15:0] out;
-
-reg [31:0] state;
-
-always @(posedge clk or posedge rst) begin
-	if (rst) state <= 0;
-	else begin
-		if (reseed) state <= seed_val;
-		else begin
-			state <= state * 32'h343fd + 32'h269EC3;
-		end
-	end
-end
-
-assign out = (state >> 16) & 16'h7fff;
-
-endmodule
\ No newline at end of file
diff --git a/example_projects/testbench_template_tb/compile.tcl b/example_projects/testbench_template_tb/compile.tcl
index 31d0cd5..2541e53 100755
--- a/example_projects/testbench_template_tb/compile.tcl
+++ b/example_projects/testbench_template_tb/compile.tcl
@@ -17,18 +17,17 @@
 set library_file_list {
 
   work {main_tb.sv
-        # main.sv
-        c_rand.v
+        main.sv
+        clk_divider.sv
         edge_detect.sv
-        delay.sv
-        clk_divider.sv}
+        delay.sv}
 }
 
 set vsim_params "-L altera_mf_ver -L altera_mf -L lpm_ver -L lpm"
 
 set top_level work.main_tb
 
-set suppress_err_list ""
+set suppress_err_list 0
 
 # Console commands:
 # r = Recompile changed and dependent files
diff --git a/example_projects/testbench_template_tb/main_tb.sv b/example_projects/testbench_template_tb/main_tb.sv
index 8f57cbe..7799abe 100755
--- a/example_projects/testbench_template_tb/main_tb.sv
+++ b/example_projects/testbench_template_tb/main_tb.sv
@@ -60,42 +60,34 @@ end
 logic nrst_once;
 assign nrst_once = ~rst_once;
 
-logic [31:0] DerivedClocks;
+logic [31:0] clk200_div;
 clk_divider #(
   .WIDTH( 32 )
 ) cd1 (
   .clk( clk200 ),
   .nrst( nrst_once ),
   .ena( 1'b1 ),
-  .out( DerivedClocks[31:0] )
+  .out( clk200_div[31:0] )
 );
 
-logic [31:0] E_DerivedClocks;
+logic [31:0] clk200_div_rise;
 edge_detect ed1[31:0] (
   .clk( {32{clk200}} ),
   .anrst( {32{nrst_once}} ),
-  .in( DerivedClocks[31:0] ),
-  .rising( E_DerivedClocks[31:0] ),
+  .in( clk200_div[31:0] ),
+  .rising( clk200_div_rise[31:0] ),
   .falling(  ),
   .both(  )
 );
 
-logic [31:0] RandomNumber1;
-c_rand rng1 (
-  .clk( clk200 ),
-  .rst( 1'b0 ),
-  .reseed( rst_once ),
-  .seed_val( DerivedClocks[31:0] ^ (DerivedClocks[31:0] << 1) ),
-  .out( RandomNumber1[15:0] )
-);
-
-c_rand rng2 (
-  .clk( clk200 ),
-  .rst( 1'b0 ),
-  .reseed( rst_once ),
-  .seed_val( DerivedClocks[31:0] ^ (DerivedClocks[31:0] << 2) ),
-  .out( RandomNumber1[31:16] )
-);
+logic [31:0] rnd_data;
+always_ff @(posedge clk200) begin
+  if( ~nrst_once ) begin
+    rnd_data[31:0] <= $random( 1 );  // seeding
+  end else begin
+    rnd_data[31:0] <= $random;
+  end
+end
 
 logic start;
 initial begin
@@ -104,7 +96,11 @@ initial begin
   #20 start = 1'b0;
 end
 
-// Module under test ==========================================================
+//initial begin
+//  #1000 $finish;
+//end
+
+// Module under test ===========================================================
 
 logic [15:0] seq_cntr = '0;
 
@@ -121,7 +117,7 @@ always_ff @(posedge clk200) begin
 
     if( seq_cntr[15:0]<300 ) begin
       id[31:0] <= '1;
-      //id[31:0] <= {4{RandomNumber1[15:0]}};
+      //id[31:0] <= {4{rnd_data[15:0]}};
     end else begin
       id[31:0] <= '0;
     end