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
|
//
// USRP2 - Universal Software Radio Peripheral Mk II
//
// Copyright (C) 2008 Matt Ettus
//
//
module cic_strober
#(parameter WIDTH=8)
( input clock,
input reset,
input enable,
input [WIDTH-1:0] rate, // Rate should EQUAL to your desired divide ratio, no more -1 BS
input strobe_fast,
output wire strobe_slow );
reg [WIDTH-1:0] counter;
wire now = (counter==1);
assign strobe_slow = now && enable && strobe_fast;
always @(posedge clock)
if(reset)
counter <= 0;
else if (~enable)
counter <= rate;
else if(strobe_fast)
if(now)
counter <= rate;
else
counter <= counter - 1;
endmodule // cic_strober
|
