一个只能计数到500的计数器,带使能和消抖,为啥不对呢??
要实现的功能:一个只能计数到100的计数器,按键经过消抖处理,
如果按键一直按着不放,则只计数一次
如果AJ_EN='0';则按键按下后不计数
...
Key:in std_logic;
...
signal clk_1khz,clk_1hz,clk_2hz,clk_5hz:std_logic;--分频后的时钟
signal Key_QD:std_logic;--消抖后的按键信息
signal AJ_EN:std_logic:='1';--按键使能
signal AA_1 : std_logic_vector(3 DOWNTO 0):="0000"; --百位
signal AA_2 : std_logic_vector(3 DOWNTO 0):="0000"; --十位
signal AA_3 : std_logic_vector(3 DOWNTO 0):="0000"; --个位
process(clk_1khz,Key)
variable count:integer range 0 to 11;
begin
if(clk_1khz'event and clk_1khz='1')then
if(Key='1')then
count:=0;
else
if(count<10)then count:=count+1;
elsif(count=10)then
Key_QD<='0';
else count:=11;
end if;
end if;
end if;
end process;
process(clk_1khz)
begin
if(AA_1>="0001")then AJ_EN<='0';
else AJ_EN<='1';
end if;
end process;
process(Key_SF_100_QD,AJ_EN)
begin
if(AJ_EN='1')then
if(Key_QD='0')then
if(AA_3<"1001")then AA_3<=AA_3+1;
elsif(AA_2<"1001")then AA_2<=AA_2+1;AA_3<="0000";
else AA_1<=AA_1+1;AA_2<="0000";AA_3<="0000";
end if;
end if;
end if;
end process;
-----------------------------------------------------------
上面这些代码,折腾了不少时间,求高手指点..... 标题有误,是100...不小心了一把 大概改下，试试
.......
if(count<10)then
count:=count+1;
Key_QD<='1';
elsif(count=10)then
Key_QD<='0';
else count:=11;
Key_QD<='1';
end if;
.........
if(clk_1khz'event and clk_1khz=1)then
if(AJ_EN='1')then
if(Key_QD='0')then
if(AA_3<"1001")then AA_3<=AA_3+1;
elsif(AA_2<"1001")then AA_2<=AA_2+1;AA_3<="0000";
else AA_1<=AA_1+1;AA_2<="0000";AA_3<="0000";
end if;
end if;
end if;
end if;
...........
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