数字电路设计实验报告1Word文档格式.docx

1、设置两个信号用于向洗衣机传送着两个消息，识别从暂停状态返回后洗衣机应该进入的状态和模式。 程序分成倒计时模块、按键控制模块、数码管显示模块、发光二极管显示模块、分频模块、防抖动模块以及状态机模块组成。最后由一个总程序调用。三设计方案1、状态框图2、状态转移图3、源程序及说明l电路主模块wash.vhdlibrary ieee;use ieee.std_logic_1164.all;use ieee.std_logic_signed.all;entity wash is -端口定义port（ clk : in std_logic; switch : pause : lights : out st

2、d_logic_vector（3 downto 0）; sell : out std_logic_vector（1 downto 0）; seg : out std_logic_vector（6 downto 0）;end wash;architecture behave of wash is -子程序调用component count50 isport（ clkin : clkout : out std_logic）;end component;component count25 iscomponent statement is t_xidi : t_piaoxi : t_tuoshui :

3、 command : out std_logic_vector（2 downto 0）; present_state : out std_logic_vector（2 downto 0）;component time isport（ clk_1Hz : in std_logic_vector（2 downto 0）; out std_logic; sec_l,sec_h : out std_logic_vector（3 downto 0）;component key is keyin : keyout :component display isport（ clk_100Hz : in std_

4、logic_vector（3 downto 0）;component lightwink is lightsin : selin : in std_logic_vector（1 downto 0）; segin : in std_logic_vector（6 downto 0）;signal clk_10000Hz,clk_100Hz, clk_2Hz,clk_1Hz : std_logic;signal time_xidi,time_piaoxi,time_tuoshui :signal switch_n,pause_n :signal present_state : std_logic_v

5、ector（2 downto 0）;signal command :signal sec_low,sec_high : std_logic_vector（3 downto 0）;signal lights4,lightsout :signal sell2,selout : std_logic_vector（1 downto 0）;signal seg7,segout : std_logic_vector（6 downto 0）;begin -端口相应信号替代link1 : count50 port map （clkin = clk, clkout = clk_10000Hz）;link2 :

6、clk_10000Hz, clkout = clk_100Hz）;link3 : clk_100Hz, clkout = clk_1Hz）;link4 : count25 port map （clkin = clk_2Hz）;link5 : key port map （clk = clk_100Hz, keyin = switch, keyout = switch_n）;link6 : pause, keyout = pause_n）;link7 : statement port map （clk = clk_2Hz, switch = switch_n, pause = pause_n, t

7、_xidi = time_xidi, t_piaoxi = time_piaoxi, t_tuoshui = time_tuoshui, command = command, present_state = present_state）;link8 : time port map （clk_1Hz = clk_1Hz, present_state = present_state, command = command, t_xidi = time_tuoshui, sec_l = sec_low, sec_h = sec_high）;link9 : display port map （clk_1

8、00Hz = clk_100Hz, sec_l = sec_high, command = present_state, lights = lights4, sell = sell2, seg = seg7）;link10 : lightwink port map （clk_1Hz = present_state, lightsin = lights4, selin = sell2, segin = seg7, lights = lightsout, sell = selout, seg = segout）;processbegin lights = lightsout; sell = sel

9、out; seg = segout;end process;end;分频模块count25.vhd和count50.vhdcount50entity count50 isend count50;architecture a of count50 is -端口的定义signal clk1 : process（clkin） variable t : integer range 0 to 49; begin if（clkinevent and clkin=1）then if（t=49）then t := 0; clk1 = not clk1; -当t等于49时输出信号翻转一次实现100分频 else

10、 t := t+1; -如果t不等于49则外部时钟变化一次t加1 end if; clkout = clk1; end process;仿真波形（count 50）count 25entity count25 is library ieee;end count25;architecture a of count25 is integer range 0 to 24; if（t=24）then -按照时钟，循环计数 -每记25个数，输出信号取反仿真波形 （count 25）防抖电路 key.vhdentity key is -输入的按键信号 -输出的按键信号end key;architectur

11、e a of key issignal cp : process（clk,keyin） integer range 0 to 1; if（clkevent and clk= if（keyin= if（t=1）then cp = ; -连续两次时钟，输入信号都为1，则输出为1 else -计数0 keyout input1 :input2 := 2; -洗涤时间20s010= 5;= 1; -漂洗时间15s011 -脱水时间10s100 -漂洗和脱水时间25s101= 4; -洗涤、漂洗和脱水总时间45s when others = end case; case present_state is -当前状态输入000 state = stop;= switch_mode;= xidi;= piaoxi;= tuoshui; if （clk_1Hzevent and clk_1Hz= if （state=xidi or state=piaoxi or state=tuoshui）then -处于洗衣状态 if （input1num1）then -num1、num2