八个流水灯依次点亮再依次熄灭循环的vhdl代码

下面是一个简单的 VHDL 代码，可以实现八个流水灯依次点亮再依次熄灭循环：

entity LED_Flasher is
    port (CLK : in std_logic;
          LED : out std_logic_vector(7 downto 0));
end LED_Flasher;

architecture Behavioral of LED_Flasher is
    signal counter : integer range 0 to 50000000;
    signal direction : std_logic := '0';
begin
    process(CLK)
    begin
        if rising_edge(CLK) then
            if counter = 50000000 then
                counter <= 0;
                if direction = '0' then
                    LED <= LED(6 downto 0) & '0';
                    LED(7) <= '1';
                    if LED = "10000000" then
                        direction <= '1';
                    end if;
                else
                    LED <= '0' & LED(7 downto 1);
                    LED(0) <= '1';
                    if LED = "00000001" then
                        direction <= '0';
                    end if;
                end if;
            else
                counter <= counter + 1;
            end if;
        end if;
    end process;
end Behavioral;

这个代码使用一个计数器来控制流水灯的闪烁速度。当计数器达到一定值时，流水灯的状态会改变，从而实现流水灯的循环效果。请注意，这个代码可能需要根据您的硬件平台进行适当修改才能正常工作。