html编写抢答器,四人抢答器VHDL编写程序控制Quartus II
时间: 2023-08-14 16:03:42 浏览: 167
基于QuartusII的EDA综合实验——抢答器
5星 · 资源好评率100%
抢答器的HTML页面可以使用以下代码:
```html
<!DOCTYPE html>
<html>
<head>
<title>抢答器</title>
</head>
<body>
<h1>抢答器</h1>
<p>请点击下面的按钮,开始抢答</p>
<button onclick="sendRequest()">抢答</button>
<script>
function sendRequest() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
alert(this.responseText);
}
};
xhttp.open("GET", "response.php", true);
xhttp.send();
}
</script>
</body>
</html>
```
这个页面中包含一个按钮,点击按钮会向服务器发送请求,并在服务器返回响应时显示响应内容。
接下来是VHDL程序的代码,用于控制抢答器。这个程序可以在Quartus II中使用。
```vhdl
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity buzzer is
port (
clk : in std_logic;
rst : in std_logic;
buzzer : out std_logic
);
end buzzer;
architecture rtl of buzzer is
signal count : unsigned(15 downto 0) := (others => '0');
begin
process (clk, rst)
begin
if rst = '1' then
count <= (others => '0');
buzzer <= '0';
elsif rising_edge(clk) then
if count = 39999 then
count <= (others => '0');
buzzer <= '1';
else
count <= count + 1;
buzzer <= '0';
end if;
end if;
end process;
end rtl;
entity qiangda is
port (
clk : in std_logic;
rst : in std_logic;
button : in std_logic;
led : out std_logic;
buzzer : out std_logic
);
end qiangda;
architecture rtl of qiangda is
signal state : integer := 0;
signal count : unsigned(15 downto 0) := (others => '0');
begin
buzzer_inst : buzzer port map (clk => clk, rst => rst, buzzer => buzzer);
process (clk, rst)
begin
if rst = '1' then
state <= 0;
count <= (others => '0');
led <= '0';
elsif rising_edge(clk) then
case state is
when 0 =>
if button = '1' then
state <= 1;
count <= (others => '0');
end if;
when 1 =>
if button = '0' then
state <= 2;
count <= (others => '0');
elsif count = 19999999 then
state <= 0;
count <= (others => '0');
led <= '1';
else
count <= count + 1;
end if;
when 2 =>
if button = '0' then
state <= 1;
count <= (others => '0');
end if;
end case;
end if;
end process;
end rtl;
```
这个程序中包含两个实体。第一个实体是buzzer,用于控制蜂鸣器的鸣叫。第二个实体是qiangda,用于控制抢答器的状态。抢答器有三种状态:等待状态、抢答状态和停止状态。在等待状态下,抢答器等待用户点击抢答按钮。在抢答状态下,抢答器开始计时,等待用户抢答。在停止状态下,抢答器停止计时,并且点亮LED指示灯。
在Quartus II中编写程序时,需要将这两个实体分别保存为buzzer.vhd和qiangda.vhd,并将它们添加到一个新的工程中。然后,使用图形用户界面创建一个顶层实体,并将buzzer和qiangda实例添加到它里面。最后,编译设计并将其下载到FPGA板上。
阅读全文