pong/debouncer.v at main · samlli/pong · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
// courtesy of Digilent https://github.com/Digilent/Nexys-A7-50T-Keyboard
`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 03/03/2015 09:08:56 PM
// Design Name:
// Module Name: debouncer
// Project Name:
// Target Devices:
// Tool Versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////


module debouncer(
    input clk,
    input I0,
    input I1,
    output reg O0,
    output reg O1
    );

    reg [4:0]cnt0, cnt1;
    reg Iv0=0,Iv1=0;
    reg out0, out1;

always@(posedge(clk))begin
    if (I0==Iv0)begin
        if (cnt0==19)O0<=I0;
        else cnt0<=cnt0+1;
      end
    else begin
        cnt0<="00000";
        Iv0<=I0;
    end
    if (I1==Iv1)begin
            if (cnt1==19)O1<=I1;
            else cnt1<=cnt1+1;
          end
        else begin
            cnt1<="00000";
            Iv1<=I1;
        end
    end

endmodule