vhdl写3乘3乘3花样流水灯
时间: 2023-10-19 19:20:30 浏览: 26
首先,需要明确一下花样流水灯的具体要求和实现方式。一般来说,花样流水灯是一种LED灯效,可以通过控制LED的亮灭顺序和时间,呈现出不同的效果。在本题中,要求实现一个3x3x3的花样流水灯,即在一个3x3的LED矩阵中,依次点亮每个LED,并逐渐向外扩散,呈现出一种类似于水波纹扩散的效果。
下面是一个简单的VHDL代码实现:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity LED_Matrix is
port(
clk : in std_logic; -- 时钟信号
reset : in std_logic; -- 复位信号
led_out : out std_logic_vector(26 downto 0) -- LED矩阵输出
);
end entity LED_Matrix;
architecture Behavioral of LED_Matrix is
signal counter : integer range 0 to 26 := 0; -- 时序计数器
signal delay_counter : integer range 0 to 100000 := 0; -- 延时计数器
signal led_data : std_logic_vector(26 downto 0) := (others => '0'); -- LED数据
begin
process(clk, reset)
begin
if reset = '1' then -- 复位
counter <= 0;
delay_counter <= 0;
led_data <= (others => '0');
elsif rising_edge(clk) then -- 上升沿触发
if delay_counter = 100000 then -- 延时计数器达到设定值
delay_counter <= 0;
counter <= counter + 1;
if counter > 26 then -- 计数器达到最大值时,重置
counter <= 0;
end if;
else
delay_counter <= delay_counter + 1; -- 延时计数器加1
end if;
-- 根据计数器的值,确定LED状态
case counter is
when 0 => led_data <= "000000001";
when 1 => led_data <= "000000010";
when 2 => led_data <= "000000100";
when 3 => led_data <= "000001000";
when 4 => led_data <= "000010000";
when 5 => led_data <= "000100000";
when 6 => led_data <= "001000000";
when 7 => led_data <= "010000000";
when 8 => led_data <= "100000000";
when 9 => led_data <= "010000000";
when 10 => led_data <= "001000000";
when 11 => led_data <= "000100000";
when 12 => led_data <= "000010000";
when 13 => led_data <= "000001000";
when 14 => led_data <= "000000100";
when 15 => led_data <= "000000010";
when 16 => led_data <= "000000001";
when 17 => led_data <= "0000000100000001";
when 18 => led_data <= "0000001000000010";
when 19 => led_data <= "0000010000000100";
when 20 => led_data <= "0000100000001000";
when 21 => led_data <= "0001000000010000";
when 22 => led_data <= "0010000000100000";
when 23 => led_data <= "0100000001000000";
when 24 => led_data <= "1000000010000000";
when 25 => led_data <= "0100000001000000";
when 26 => led_data <= "0010000000100000";
when others => null; -- 其他情况下,LED状态不变
end case;
end if;
end process;
led_out <= led_data; -- 输出LED数据
end architecture Behavioral;
```
在上述代码中,我们使用了两个计数器,`counter`和`delay_counter`。其中,`counter`用于控制LED的亮灭顺序和时间,`delay_counter`用于控制LED的亮灭时间间隔和扩散速度。具体实现方式如下:
1. `counter`从0到26循环计数,分别对应LED矩阵中的每个LED,根据计数器的值,确定LED状态。
2. 当`counter`计数到最大值时,重置为0,重新开始循环。
3. `delay_counter`用于控制LED的亮灭时间间隔和扩散速度。每当`delay_counter`计数到设定值时,`counter`加1,控制LED状态的变化。
4. 为了实现水波纹扩散的效果,我们在计数器计数到第9个LED时,将计数器的方向反转,即从第9个LED开始往回倒序点亮。
最后,将LED矩阵数据输出到`led_out`信号中,即可实现3x3x3花样流水灯的效果。