用vhdl语言编写一个十位抢答器其中包括选手按键编码模块：将10个选手的抢答键映射为二进制编码，每个键对应一个编码。可以使用一个10位的二进制计数器实现，每个键对应计数器的一个比特位。在按键按下时，将该比特位的值置为1，表示该选手抢答成功。 抢答及锁定模块：在选手按键编码模块的基础上，实现抢答和锁定功能。当某个选手按下抢答键时，触发抢答信号。同时，将所有选手的抢答键锁定，即将所有比特位的值置为0。该模块还需要实现手动重置功能，当按下重置键时，所有比特位的值清零，重新开始抢答。 结果显示驱动模块：在抢答及锁定模块的基础上，实现结果显示功能。当抢答信号触发后，根据选手按键编码模块中记录的编码，确定抢答选手的编号，并将该编号输出到驱动七段液晶显示器的接口。

以下是一个十位抢答器的 VHDL 代码示例，包括选手按键编码模块、抢答及锁定模块和结果显示驱动模块：

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity quiz_buzzer is
  port (
    clk: in std_logic; -- 时钟信号
    reset: in std_logic; -- 重置信号
    buzzer: in std_logic_vector(9 downto 0); -- 选手抢答信号
    display: out std_logic_vector(3 downto 0); -- 显示选手编号
    led: out std_logic_vector(9 downto 0) -- LED 亮度
  );
end entity quiz_buzzer;

architecture Behavioral of quiz_buzzer is
  -- 选手按键编码模块
  signal player_key: std_logic_vector(9 downto 0);
  signal player_code: std_logic_vector(9 downto 0);

  -- 抢答及锁定模块
  signal buzzer_lock: std_logic;
  signal buzzer_triggered: std_logic;
  signal buzzer_winner: std_logic_vector(9 downto 0);

  -- 结果显示驱动模块
  signal display_winner: std_logic_vector(3 downto 0);

begin
  -- 选手按键编码模块
  process(clk, reset)
  begin
    if reset = '1' then
      player_key <= (others => '0');
      player_code <= (others => '0');
    elsif rising_edge(clk) then
      if buzzer_lock = '0' then
        player_key <= buzzer;
        case player_key is
          when "0000000001" => player_code <= "0000000001";
          when "0000000010" => player_code <= "0000000010";
          when "0000000100" => player_code <= "0000000100";
          when "0000001000" => player_code <= "0000001000";
          when "0000010000" => player_code <= "0000010000";
          when "0000100000" => player_code <= "0000100000";
          when "0001000000" => player_code <= "0001000000";
          when "0010000000" => player_code <= "0010000000";
          when "0100000000" => player_code <= "0100000000";
          when "1000000000" => player_code <= "1000000000";
          when others => player_code <= (others => '0');
        end case;
      end if;
    end if;
  end process;

  -- 抢答及锁定模块
  process(clk, reset)
  begin
    if reset = '1' then
      buzzer_lock <= '0';
      buzzer_triggered <= '0';
      buzzer_winner <= (others => '0');
    elsif rising_edge(clk) then
      if buzzer_lock = '0' then
        if buzzer = "0000000001" and player_code(0) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0000000001";
        elsif buzzer = "0000000010" and player_code(1) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0000000010";
        elsif buzzer = "0000000100" and player_code(2) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0000000100";
        elsif buzzer = "0000001000" and player_code(3) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0000001000";
        elsif buzzer = "0000010000" and player_code(4) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0000010000";
        elsif buzzer = "0000100000" and player_code(5) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0000100000";
        elsif buzzer = "0001000000" and player_code(6) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0001000000";
        elsif buzzer = "0010000000" and player_code(7) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0010000000";
        elsif buzzer = "0100000000" and player_code(8) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "0100000000";
        elsif buzzer = "1000000000" and player_code(9) = '1' then
          buzzer_triggered <= '1';
          buzzer_winner <= "1000000000";
        end if;
        if buzzer_triggered = '1' then
          buzzer_lock <= '1';
          player_key <= (others => '0');
        end if;
      else
        if buzzer_winner /= (others => '0') then
          buzzer_triggered <= '0';
          buzzer_winner <= (others => '0');
          buzzer_lock <= '0';
        end if;
      end if;
    end if;
  end process;

  -- 结果显示驱动模块
  process(clk, reset, buzzer_lock, buzzer_winner)
  begin
    if reset = '1' then
      display_winner <= (others => '0');
    elsif rising_edge(clk) then
      if buzzer_lock = '1' then
        display_winner <= buzzer_winner(3 downto 0);
      else
        display_winner <= (others => '0');
      end if;
    end if;
  end process;

  -- 显示选手编号
  display <= display_winner;

  -- LED 亮度
  led <= player_code;
end architecture Behavioral;

这段代码实现了一个十位抢答器，包括选手按键编码模块、抢答及锁定模块和结果显示驱动模块。可以根据这个示例进行修改，实现具体功能要求。需要注意的是，还需要进行仿真测试，确保各个模块的功能正常。