module KEY(led1,led2,odata,key,clk);
output led1;
output led2;
output[7:0] odata; ////数据输出到其他模块
input key;
input clk;
reg led1;
reg led2;
reg[24:0] clkcount;
reg keydowntag;
reg[2:0] readkey;
//reg[[7:0] adder;
reg[7:0] odata;
reg[7:0] dbuf;
reg[1:0] keystate;
always @(posedge clk)
begin
clkcount=clkcount+1'b1;
end
always @ (clkcount[23])
begin
if(key==0) // //当按键按下时
begin
if(readkey>=2) //当检测到2次按键信号时
begin
if(keystate==KEYUP)
begin
keystate=2;
dbuf=dbuf+1;
odata=dbuf;
led1=~led1;
led2=1;
readkey=0;
end
end
else
begin
readkey=readkey+1;
if(keystate==KEYDOWN)
begin
keystate=KEYHOLD;
readkey=0;
end
end
end
else
begin
readkey=0;
keystate=KEYUP;
end
end
endmodule
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