数字电子课程设计--交通灯

1、东西方向秒表的低位东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状态机，定义四种状态sti,st2,st3,st4定义秒表为30秒交通灯设计总结报告一方案设计与论证使用vhdl语言编程，在结构体屮制造一个单进程状态机，此状态机只 进行单纯的状态转换，每个状态中不涉及控制交通灯的亮灭，交通灯的 亮灭在单独的一个进程中进行控制。时钟由20mhz的晶体分频形成1hz 的秒信号。二.vhdl编程设计library ieee;use ieee.std_logic_1164.all;使用库函数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分频东西绿灯，南北红灯东西黄灯，南北红灯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"东西红灯，南北绿灯东西红灯，南北黄灯高低位都用四位二进制表示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 和锁定引脚node namedirectionlocationreservedgroup:1 okinputpin612° ew.goutputpinj143u ew.routputpin.4244一。ewj13outputpin."ewjl3.o453ew.tl outputpin.48ewjl3.o46o ew.t11outputpin.4947ewj1(o)o