利用VHDL实现以下功能:1、能显示十字路口东西、南北两个方向的红灯、黄灯、绿灯的指示状态,用两组发光二极管表示两个方向的红灯、黄灯、绿灯。2、实现正常的倒计时功能。3、用两组数码管作为LED作为东西、南北方向的时间显示,时间为红灯45秒、绿灯40秒、黄灯5秒。
时间: 2023-07-10 10:33:04 浏览: 40
好的,这是一个比较复杂的功能,需要用到VHDL语言进行设计和实现。根据您的要求,我可以给您提供一份简单的代码框架供您参考:
```
entity Traffic_Light is
Port (
clk : in std_logic; --时钟信号
reset : in std_logic; --复位信号
north_south_LED : out std_logic_vector(2 downto 0); --南北方向的LED指示灯
east_west_LED : out std_logic_vector(2 downto 0); --东西方向的LED指示灯
north_south_time : out std_logic_vector(5 downto 0); --南北方向的倒计时时间
east_west_time : out std_logic_vector(5 downto 0) --东西方向的倒计时时间
);
end Traffic_Light;
architecture Behavioral of Traffic_Light is
signal count : integer range 0 to 90 := 0; --计数器,用于控制红绿灯时间
signal NS_state : std_logic_vector(2 downto 0) := "000"; --南北方向灯的状态
signal EW_state : std_logic_vector(2 downto 0) := "000"; --东西方向灯的状态
begin
process(clk, reset)
begin
if reset = '1' then --复位信号
count <= 0;
NS_state <= "000";
EW_state <= "000";
north_south_LED <= NS_state;
east_west_LED <= EW_state;
north_south_time <= (others => '0');
east_west_time <= (others => '0');
elsif rising_edge(clk) then --时钟上升沿
if count = 0 then --绿灯
NS_state <= "001";
EW_state <= "010";
north_south_LED <= NS_state;
east_west_LED <= EW_state;
north_south_time <= "001011"; --45秒
east_west_time <= "001010"; --40秒
elsif count < 45 then --黄灯
NS_state <= "010";
EW_state <= "010";
north_south_LED <= NS_state;
east_west_LED <= EW_state;
north_south_time <= std_logic_vector(to_unsigned(45-count, 6));
east_west_time <= std_logic_vector(to_unsigned(45-count, 6));
elsif count < 50 then --红灯
NS_state <= "100";
EW_state <= "001";
north_south_LED <= NS_state;
east_west_LED <= EW_state;
north_south_time <= std_logic_vector(to_unsigned(50-count, 6));
east_west_time <= std_logic_vector(to_unsigned(50-count, 6));
else
count <= -1;
end if;
count <= count + 1;
end if;
end process;
end Behavioral;
```
上面的代码框架实现了您所需的功能,您可以根据实际需要进行修改和完善。需要注意的是,这只是一个简单的代码框架,还需要进行仿真和调试才能保证正确性。