帮我写一个基于vhdl语言的课程设计代码，课程设计主题是使用光敏电阻识别钢琴块小游戏上的黑块并模拟手指触碰黑块，整个代码包括计数模块、识别模块、响应模块和终止模块。其中终止模块的作用是当工作频率高于指定频率时蜂鸣器响并且整个板子复位到初始状态

好的，我可以为您提供一个基于vhdl语言的课程设计代码，课程设计主题是使用光敏电阻识别钢琴块小游戏上的黑块并模拟手指触碰黑块，整个代码包括计数模块、识别模块、响应模块和终止模块。以下是代码示例：

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;

entity piano_game is
    Port ( clk : in STD_LOGIC;
           rst : in STD_LOGIC;
           sensor : in STD_LOGIC_VECTOR (3 downto );
           buzzer : out STD_LOGIC;
           led : out STD_LOGIC_VECTOR (3 downto );
           touch : out STD_LOGIC_VECTOR (3 downto ));
end piano_game;

architecture Behavioral of piano_game is

    -- 定义常量
    constant N : integer := 4; -- 钢琴块数量
    constant FREQ : integer := 50000000; -- 工作频率
    constant THRESHOLD : integer := 100; -- 光敏电阻阈值
    constant T : integer := FREQ / 100; -- 计时器周期

    -- 定义信号
    signal count : unsigned(7 downto ) := (others => ''); -- 计数器
    signal state : unsigned(1 downto ) := "00"; -- 状态机状态
    signal touch_state : std_logic_vector(3 downto ) := (others => ''); -- 触摸状态
    signal buzzer_state : std_logic := ''; -- 蜂鸣器状态
    signal reset_state : std_logic := ''; -- 复位状态

begin

    -- 计数模块
    process(clk, rst)
    begin
        if rst = '1' then
            count <= (others => '');
        elsif rising_edge(clk) then
            if count = T - 1 then
                count <= (others => '');
            else
                count <= count + 1;
            end if;
        end if;
    end process;

    -- 识别模块
    process(clk, rst)
    begin
        if rst = '1' then
            state <= "00";
        elsif rising_edge(clk) then
            case state is
                when "00" =>
                    if sensor() < THRESHOLD then
                        state <= "01";
                        touch_state() <= '1';
                    end if;
                when "01" =>
                    if sensor(1) < THRESHOLD then
                        state <= "10";
                        touch_state(1) <= '1';
                    else
                        state <= "00";
                        touch_state() <= '';
                    end if;
                when "10" =>
                    if sensor(2) < THRESHOLD then
                        state <= "11";
                        touch_state(2) <= '1';
                    else
                        state <= "00";
                        touch_state(1) <= '';
                    end if;
                when "11" =>
                    if sensor(3) < THRESHOLD then
                        state <= "00";
                        touch_state(3) <= '1';
                    else
                        state <= "00";
                        touch_state(2) <= '';
                    end if;
            end case;
        end if;
    end process;

    -- 响应模块
    process(clk, rst)
    begin
        if rst = '1' then
            buzzer_state <= '';
            led <= (others => '');
        elsif rising_edge(clk) then
            case touch_state is
                when "0001" =>
                    buzzer_state <= '1';
                    led <= "0001";
                when "001" =>
                    buzzer_state <= '1';
                    led <= "001";
                when "010" =>
                    buzzer_state <= '1';
                    led <= "010";
                when "100" =>
                    buzzer_state <= '1';
                    led <= "100";
                when others =>
                    buzzer_state <= '';
                    led <= (others => '');
            end case;
        end if;
    end process;

    -- 终止模块
    process(clk, rst)
    begin
        if rst = '1' then
            reset_state <= '';
        elsif rising_edge(clk) then
            if count = FREQ - 1 then
                reset_state <= '1';
                buzzer <= buzzer_state;
            else
                reset_state <= '';
                buzzer <= '';
            end if;
        end if;
    end process;

    -- 输出信号
    touch <= touch_state;
    buzzer <= buzzer_state;
    led <= touch_state;

end Behavioral;

希望这个代码对您有所帮助！