基于EP4CE6E22C8写一个VHDL洗衣机控制器设计编码,编码要求 : (1)设计一个电子定时器,控制洗衣机作如下运转:定时启动—>正转20秒->暂停10秒->反转20秒->暂停10秒->定时未到回到“正转20秒 暂停10秒 ……”,定时到则停止; (2)若定时到,则停机发出音响信号; (3)用两个数码管显示洗涤的预置时间(分钟数),按倒计时方式对洗涤过程作计时显示,直到时间到停机;洗涤过程由“开始”信号开始; (4)三只LED灯表示“正转”、“反转”、“暂停”三个状态。
时间: 2024-01-20 19:02:34 浏览: 21
根据您的要求,我为您编写了如下的VHDL代码:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity washing_machine_controller is
port (
clk_in : in std_logic;
start : in std_logic;
timer : in std_logic_vector(15 downto 0);
buzzer : out std_logic;
led_fwd : out std_logic;
led_rev : out std_logic;
led_pause : out std_logic;
seg1 : out std_logic_vector(6 downto 0);
seg2 : out std_logic_vector(6 downto 0)
);
end entity washing_machine_controller;
architecture rtl of washing_machine_controller is
signal counter : std_logic_vector(23 downto 0);
signal time_remaining : std_logic_vector(15 downto 0);
signal state : std_logic_vector(1 downto 0);
signal direction : std_logic;
begin
process (clk_in)
begin
if rising_edge(clk_in) then
if start = '1' then
counter <= (others => '0');
time_remaining <= timer;
state <= "00";
direction <= '1';
else
case state is
when "00" =>
-- start the motor in forward direction
led_fwd <= '1';
led_rev <= '0';
led_pause <= '0';
if counter = std_logic_vector(to_unsigned(10000000, 24)) then
state <= "01";
counter <= (others => '0');
else
counter <= counter + 1;
end if;
when "01" =>
-- stop the motor and wait for 10 seconds
led_fwd <= '0';
led_rev <= '0';
led_pause <= '1';
if counter = std_logic_vector(to_unsigned(5000000, 24)) then
state <= "10";
counter <= (others => '0');
else
counter <= counter + 1;
end if;
when "10" =>
-- start the motor in reverse direction
led_fwd <= '0';
led_rev <= '1';
led_pause <= '0';
if counter = std_logic_vector(to_unsigned(10000000, 24)) then
state <= "11";
counter <= (others => '0');
else
counter <= counter + 1;
end if;
when "11" =>
-- stop the motor and wait for 10 seconds
led_fwd <= '0';
led_rev <= '0';
led_pause <= '1';
if counter = std_logic_vector(to_unsigned(5000000, 24)) then
state <= "00";
counter <= (others => '0');
else
counter <= counter + 1;
end if;
end case;
if time_remaining = "0000000000000000" then
buzzer <= '1';
else
buzzer <= '0';
time_remaining <= time_remaining - 1;
end if;
end if;
end if;
end process;
process (time_remaining)
begin
seg1 <= std_logic_vector(to_unsigned(time_remaining / 10, 7));
seg2 <= std_logic_vector(to_unsigned(time_remaining mod 10, 7));
end process;
end architecture rtl;
```
该代码中包含了一个时序逻辑处理器,用于控制洗衣机的运转。该处理器会根据 `start` 信号的状态以及当前的计数器值来判断洗衣机的当前状态,并控制各种状态下的LED灯的亮灭。计数器时钟采用了一个24位的计数器,可以满足洗衣机运转时需要的计时精度。
同时,该代码还包含了一个倒计时器,用于显示洗衣机的预置时间,并在洗衣机运转时实时更新剩余时间。倒计时器使用了两个七段数码管进行显示。
最后,当倒计时器计时结束时,蜂鸣器会发出音响信号,表示洗衣机运转结束。