Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Sign up
Appearance settings
This repository was archived by the owner on Nov 26, 2020. It is now read-only.

Commit bfe2f82

Browse files
vcd dump and monitor statement added
1 parent d8b5292 commit bfe2f82

File tree

1 file changed

+26
-20
lines changed

1 file changed

+26
-20
lines changed

‎src/FourBitCounter.v‎

Lines changed: 26 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -1,3 +1,4 @@
1+
// An active low reset signal is used for resetting the counter.
12
module counter (input clk, input rstn, output reg[3:0] out);
23
always @ (posedge clk) begin
34
if (! rstn)
@@ -8,26 +9,31 @@ module counter (input clk, input rstn, output reg[3:0] out);
89
endmodule
910

1011
module tb_counter;
11-
reg clk;
12-
reg rstn;
13-
wire [3:0] out;
12+
reg clk;
13+
reg rstn;
14+
wire [3:0] out;
1415

15-
counter c0 ( .clk (clk),
16-
.rstn (rstn),
17-
.out (out));
18-
19-
// Generate a clock that should be driven to design
20-
// This clock will flip its value every 5ns -> time period = 10ns -> freq = 100 MHz
21-
always #5 clk = ~clk;
22-
23-
initial begin
24-
clk <= 0;
25-
rstn <= 0;
26-
27-
#20 rstn <= 1;
28-
#80 rstn <= 0;
29-
#50 rstn <= 1;
16+
counter c0(.clk(clk), .rstn (rstn), .out (out));
17+
18+
// Generate a clock that should be driven to design
19+
// This clock will flip its value every 5ns -> time period = 10ns -> freq = 100 MHz
20+
always #5 clk = ~clk;
21+
22+
initial
23+
begin
24+
$dumpfile("vcd/FourBitCounter.vcd");
25+
$dumpvars(0,tb_counter);
26+
27+
$display("Clock \t Reset \t Output");
28+
$monitor("%b %b %b", clk, rstn, out);
29+
30+
clk <= 0;
31+
rstn <= 0;
3032

31-
#20 $finish;
32-
end
33+
#20 rstn <= 1;
34+
#80 rstn <= 0;
35+
#50 rstn <= 1;
36+
#20
37+
$finish;
38+
end
3339
endmodule

0 commit comments

Comments
(0)

AltStyle によって変換されたページ (->オリジナル) /