Added SystemVerilog variant of main_tb

Author: Konstantin Pavlov

Main_tb.v

@@ -0,0 +1,93 @@
+//------------------------------------------------------------------------------
+// main_tb.sv
+// Konstantin Pavlov, pavlovconst@gmail.com
+//------------------------------------------------------------------------------
+
+// INFO ------------------------------------------------------------------------
+// Testbench template with basic clocking, reset and random stimulus signals
+
+`timescale 1ns / 1ps
+
+module main_tb();
+
+logic clk200;
+initial begin
+  #0 clk200 = 1;
+  forever
+    #2.5 clk200 = ~clk200;
+end
+
+logic rst;
+initial begin
+  #10.2 rst = 1;
+  #5 rst = 0;
+  //#10000;
+  forever begin
+    #9985 rst = ~rst;
+    #5 rst = ~rst;
+  end
+end
+
+logic nrst;
+assign nrst = ~rst;
+
+logic rst_once;
+initial begin       // initializing non-X data before PLL starts
+  #10.2 rst_once = 1;
+  #5 rst_once = 0;
+end
+initial begin
+  #510.2 rst_once = 1;    // PLL starts at 500ns, clock appears, so doing the reset for modules
+  #5 rst_once = 0;
+end
+
+logic nrst_once;
+assign nrst_once = ~rst_once;
+
+logic [31:0] DerivedClocks;
+ClkDivider #(
+  .WIDTH( 32 )
+) CD1 (
+  .clk( clk200 ),
+  .nrst( nrst_once ),
+  .out( DerivedClocks[31:0] )
+);
+
+logic [31:0] E_DerivedClocks;
+EdgeDetect #(
+  .WIDTH( 32 )
+) ED1 (
+  .clk( clk200 ),
+  .nrst( nrst_once ),
+  .in( DerivedClocks[31:0] ),
+  .rising( E_DerivedClocks[31:0] ),
+  .falling(  ),
+  .both(  )
+);
+
+logic [15:0] RandomNumber1;
+c_rand RNG1 (
+  .clk( clk200 ),
+  .rst( rst_once ),
+  .reseed( 1'b0 ),
+  .seed_val( DerivedClocks[31:0] ),
+  .out( RandomNumber1[15:0] )
+);
+
+logic start;
+initial begin
+  #0 start = 1'b0;
+  #100.2 start = 1'b1;
+  #5 start = 1'b0;
+end
+
+// Module under test ==========================================================
+
+wire out1,out2;
+Main M (    // module under test
+  clk200,~clk200,
+  rst_once,
+  out1,out2   // for compiler not to remove logic
+);
+
+endmodule

main_tb.sv

@@ -0,0 +1,87 @@
+//------------------------------------------------------------------------------
+// main_tb.v
+// Konstantin Pavlov, pavlovconst@gmail.com
+//------------------------------------------------------------------------------
+
+// INFO ------------------------------------------------------------------------
+// Testbench template with basic clocking, reset and random stimulus signals
+// See main_tb.sv file for SystemVerilog version of this module
+
+`timescale 1ns / 1ps
+
+module main_tb();
+
+reg clk200;
+initial begin
+  #0 clk200 = 1;
+  forever
+
+end
+
+reg rst;
+initial begin
+  #10.2 rst = 1;
+  #5 rst = 0;
+  //#10000;
+  forever begin
+    #9985 rst = ~rst;
+    #5 rst = ~rst;
+  end
+end
+wire nrst = ~rst;
+
+reg rst_once;
+initial begin       // initializing non-X data before PLL starts
+  #10.2 rst_once = 1;
+  #5 rst_once = 0;
+end
+initial begin
+  #510.2 rst_once = 1;    // PLL starts at 500ns, clock appears, so doing the reset for modules
+  #5 rst_once = 0;
+end
+wire nrst_once = ~rst_once;
+
+wire [31:0] DerivedClocks;
+ClkDivider CD1 (
+  .clk( clk200 ),
+  .nrst( nrst_once ),
+  .out( DerivedClocks[31:0] )
+);
+defparam CD1.WIDTH = 32;
+
+wire [31:0] E_DerivedClocks;
+EdgeDetect ED1 (
+  .clk( clk200 ),
+  .nrst( nrst_once ),
+  .in( DerivedClocks[31:0] ),
+  .rising( E_DerivedClocks[31:0] ),
+  .falling(  ),
+  .both(  )
+);
+defparam ED1.WIDTH = 32;
+
+wire [15:0] RandomNumber1;
+c_rand RNG1 (
+  .clk( clk200 ),
+  .rst( rst_once ),
+  .reseed( 1'b0 ),
+  .seed_val( DerivedClocks[31:0] ),
+  .out( RandomNumber1[15:0] )
+);
+
+reg start;
+initial begin
+  #100.2 start = 1;
+  #5 start = 0;
+end
+
+// Module under test ==========================================================
+
+wire out1,out2;
+Main M (    // module under test
+  clk200,~clk200,
+  rst_once,
+  out1,out2   // for compiler not to remove logic
+);
+
+endmodule