用vhdl语言实现以下流程：书写一个彩灯控制器，先让8盏灯全灭，然后依次点亮，后让8盏灯全亮，然后依次熄灭，最后让8盏灯全亮全灭，全亮全灭，全亮全灭，全亮全灭

好的，以下是一个实现方案：

entity led_controller is
    port (
        clk : in std_logic; -- 时钟信号
        rst : in std_logic; -- 复位信号
        led : out std_logic_vector(7 downto 0) -- 控制8盏灯的信号
    );
end entity;

architecture rtl of led_controller is
    signal count : unsigned(2 downto 0) := (others => '0'); -- 计数器，用于延时
    signal state : std_logic_vector(5 downto 0) := "000000"; -- 状态机状态

begin
    process (clk)
    begin
        if rising_edge(clk) then
            if rst = '1' then
                -- 复位状态
                count <= (others => '0');
                state <= "000000";
                led <= (others => '0');
            else
                -- 根据状态机状态控制灯的状态
                case state is
                    when "000000" =>
                        -- 全灭状态
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000001";
                        else
                            count <= count + 1;
                        end if;
                        led <= (others => '0');
                        
                    when "000001" =>
                        -- 依次点亮
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000010";
                        else
                            count <= count + 1;
                        end if;
                        led(count) <= '1';
                        
                    when "000010" =>
                        -- 全亮状态
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000011";
                        else
                            count <= count + 1;
                        end if;
                        led <= (others => '1');
                        
                    when "000011" =>
                        -- 依次熄灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000100";
                        else
                            count <= count + 1;
                        end if;
                        led(count) <= '0';
                        
                    when "000100" =>
                        -- 全亮状态
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000101";
                        else
                            count <= count + 1;
                        end if;
                        led <= (others => '1');
                        
                    when "000101" =>
                        -- 依次熄灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000110";
                        else
                            count <= count + 1;
                        end if;
                        led(count) <= '0';
                        
                    when "000110" =>
                        -- 全亮全灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000111";
                        else
                            count <= count + 1;
                        end if;
                        led <= (others => '1');
                        
                    when "000111" =>
                        -- 全亮全灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "001000";
                        else
                            count <= count + 1;
                        end if;
                        led <= not led;
                        
                    when "001000" =>
                        -- 全亮全灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "001001";
                        else
                            count <= count + 1;
                        end if;
                        led <= (others => '1');
                        
                    when "001001" =>
                        -- 全亮全灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "001010";
                        else
                            count <= count + 1;
                        end if;
                        led <= not led;
                        
                    when "001010" =>
                        -- 全亮全灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "001011";
                        else
                            count <= count + 1;
                        end if;
                        led <= (others => '1');
                        
                    when "001011" =>
                        -- 全亮全灭
                        if count = 7 then
                            count <= (others => '0');
                            state <= "000001";
                        else
                            count <= count + 1;
                        end if;
                        led <= not led;
                        
                    when others =>
                        null;
                end case;
            end if;
        end if;
    end process;
end architecture;

这个控制器也是一个状态机，但是状态更多，实现了全亮全灭的效果。控制器的状态机状态变化和前面的实现方案类似，但是在状态 "000110" 到 "001011" 中，控制器会让灯在全亮和全灭的状态之间切换，实现全亮全灭的效果。在状态 "001011" 中，控制器会回到状态 "000001"，重新开始循环。这样控制器就会不断循环地让8盏灯全灭、依次点亮、全亮、依次熄灭、全亮全灭，循环四次后重新开始。