數字電子課程設計--交通燈

1、東西方向秒表的低位東西方向秒表的高位南北方向秒表的低位南北方向秒表的高位利用狀態(tài)機，定義四種狀態(tài)sti,st2,st3,st4定義秒表為30秒交通燈設計總結報告一方案設計與論證使用vhdl語言編程，在結構體屮制造一個單進程狀態(tài)機，此狀態(tài)機只 進行單純的狀態(tài)轉換，每個狀態(tài)中不涉及控制交通燈的亮滅，交通燈的 亮滅在單獨的一個進程中進行控制。時鐘由20mhz的晶體分頻形成1hz 的秒信號。二.vhdl編程設計library ieee;use ieee.std_logic_1164.all;使用庫函數use ieee.std logic unsigned.all;use ieee.std logic

2、arith.all;entity traffic isport(clk:instd_logic;rst: in std_logic;ew_t1 : out std_l0gic_vect0r(3 downto 0);ew_t2: out std_l0gic_vect0r(3 downto 0); ew r : out std logic;ew g : out std logic;ew_y : out std_logic;ns_t1 :out std_l0gic_vect0r(3 downto 0);ns_t2: out std_l0gic_vect0r(3 downto 0); ns r: ou

3、t std logic;ns g : out std logic;mbmm夕ns_y : out std_logic;)；end entity traffic;architecture func of traffic istype state 1 is (st1,st2,st3,st4);signal state :state1;signal clk 1hz : std logic;signal count1 : integer range 0 to 30;signal count2 : integer range 0 to 30;beginpo:process(clk)variable a

4、: std_logic_vector(23 downto 0);beginif(clk*event and clk二t) theniffa'loolloooloololloolllllll'hhenclk_1hz<=not clk_1hz; a:=(others=>'0');elsea:=a+1;end if;end if;end process po;p:process(clk_1hz)beginif(rst='1')thenstate<=st1;count1<=30;count2<=30;ew_r<=

5、9;0'ew g<='1'ew_y<='0'ns_r<='1'ns_g<=,0,;ns_y<='o'elsif(clk_1hz'event and clk_1hz='1,)then case state iswhen sti => ew_r<='0'ew_g<='1'ew_y<='0'ns_r<=,1,;ns_g<=*0'ns_y<='o*;if(count1=5)then

6、state<=st2;elsestate<=st1;end if;count1<=count1-1;count2<=count2-1;when st2 =>ew_r<='0'ew_g<='0*;ew_y<='1'ns_r<='1,;ns g<='o'ns_y<='0,;if(count2=1)then分頻東西綠燈，南北紅燈東西黃燈，南北紅燈state<=st3;count1<=25;count2<=25;elsestate<=st2;

7、end if;count2<=count2-1;count1<=count1-1; when st3 =>ew_r<='1'ew_g<='0'ew_y<='0'ns_r<=,0,;ns_g<=,1,;ns_y<='0,;if(count2=5)thenstate<=st4;elsestate<=st3;end if;count2<=count2-1;count1<=count1-1; when st4 => ew_r<='1,;ew_g<

8、;='0'ew_y<='0'ns_r<=,0,;ns_g<='0'ns_y<='1,;if(count1=1)thenstate<=st1;elsestate<=st4; end if;count2<=count2-1;count1<=count1-1;when others => state <= sti;end case;end if;end process p;p1:process(clk_1hz)begincase c0unt1 iswhen 0 =>ew_tl&l

9、t;="0000"東西紅燈，南北綠燈東西紅燈，南北黃燈高低位都用四位二進制表示when2=>when 3 =>when4=>when 5 =>when 6=>when 7=>when8=>when9=>when 10 =>when 11 =>when 12 =>when 13 =>when 14 =>when 15 =>when 16 =>when 17 =>when 18 =>when 19 =>when 20 =>when 21 =>when 22 =

10、>ew_tlv二 ”0011"ew_t2<=',0000n;ew_tl<="0100,'ew_t2<="0000n;ew_tl<="0101"ew_t2<="0000n;ew_tl<="0110"ew_t2<=',0000n;ew_tl<="0111"ew_t2<="0000n;ew_tl<="1000"ew t2<="0000u;ew_tl<="

11、;1001"ew_t2<="0000n;ew_tl<=h0000"ew_t2<="0001"ew tl<=,0001h;ew_t2<="0001,'ew_tl<=h0010h;ew_t2<="0001"ew_tl<=,0011h;ew_t2<=,0001,1;ew_tl<="0100,'ew_t2<="0001h;ew_tl<=h0101h;ew_t2<="0001"ew_tk=,0

12、110"ew_t2<=',0001n;ew_tl<=h0111h;ew_t2<=,0001"ew_tl<=h1000h;ew t2<="0001n;ew_tl<="1001h;ew_t2<="0001n;ew_tl<=h0000"ew_t2<="0010h;ew tl<=,0001h;ew_t2<="0010,'ew_tl<=,0010h;when 24 =>when 25 =>when 26 =>when 2

13、7 =>when 28 =>when 29 =>when 30 =>ew_tl<="0101"ew_t2<=”0010“；ew_tl<=,0110h;ew_t2<=,0010"ew_tl<=,0111h;ew_t2<=,0010n;ew_tl<="1000"ew_t2<=”0010“；ew_tl<=,1001h;ew_t2<=,0010"ew_tl<=h0000h;ew t2<="0011n;when others => n

14、ull;end case;case count2 iswhen0=>when 1=>when2=>when 3 =>when4=>when5=>when 6=>when7=>when8=>when9=>when 10 =>when 11 =>ns_tl<=,0000n;ns_t2<="0000"ns_tl<="0001"ns_t2<="0000,'ns_tl<="0010h;ns_t2<="0000"

15、ns_tl<=,0011h;ns_t2<="0000h;ns_tl<=,0100n;ns_t2<="0000"ns_tl<=,0101n;ns_t2<=,0000n;ns_tl<=,0110n;ns_t2<="0000"ns_tl<=m0111"ns t2<="0000h;ns_tl<=,1000n;ns_t2<="0000"ns_tl<="1001"ns_t2<="0000"ns

16、tl<="0000"ns_t2<="0001"ns_tl<=,0001,1;when 13 =>when 14 =>when 15 =>when 16 =>when 17 =>when 18 =>when 19 =>when 20 =>when 21 =>when 22 =>when 23 =>when 24 =>when 25 =>when 26 =>when 27 =>when 28 =>when 29 =>when 30 =>

17、;ns_tl<="0100"ns_t2<=,0001"ns_tl<="0101"ns_t2<="0001"ns_tl<="0110"ns_t2<="0001"ns_tl<=,0111"ns_t2<=,0001"ns_tl<=,1000,;ns_t2<="0001"ns_tl<="1001" ns t2<="0001h;ns_tl<=&quo

18、t;0000"ns_t2<="0010"ns_tl<="0001,;ns_t2<="0010"ns tl<="0010"ns_t2<="0010"nstlv-'ooir；ns_t2<="0010"nstivoioo”;ns_t2<="0010"ns_tl<="0101"ns_t2<="0010"ns_tl<=,0110"ns_t2<=

19、"0010"ns_tl<=,0111"ns_t2<=,0010n;ns_tl<="1000"ns_t2<="0010"ns_tl<="1001" ns t2<="0010"ns_tl<="0000"ns_t2<=,0011,'when others => null;end case;end process pl;end architecture func;三.仿真波形 和鎖定引腳node namedirectionlocationreservedgroup:1 okinputpin612° ew.goutputpinj143u ew.routputpin.4244一。ewj13outputpin."ewjl3.o453ew.tl outputpin.48ewjl3.o46o ew.t11outputpin.4947ewj1(o)o