请问一下这按键是怎么消抖的呀？

module shumaguan(clk,key_in,key_out);
input clk;
input[key_width-1:0] key_in;
output[key_width-1:0]key_out;
reg[key_width-1:0]dout1,dout2,dout3;
parameter key_width=8;
assign key_out=(dout1|dout2|dout3)
always@(posedge clk)
begin
        dout1<=key_in;
        dout2<=dout1;
        dout3<=dout2;
end
endmodule
请问一下这按键是怎么消抖的呀？

module shumaguan(clk,key_in,key_out);
input clk;
input[key_width-1:0] key_in;
output[key_width-1: ...
vvt 发表于 2011-6-1 11:08

    always@(posedge clk)
begin
        dout1<=key_in;
        dout2<=dout1;
        dout3<=dout2;
end
就是这段程序，打了几拍消抖的啊