📄 自己用vhdl语言写的交通灯控制器，在实验板上能运行，可以应付老师的检查了--原野.htm
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<TD><STRONG>自己用VHDL语言写的交通灯控制器，在实验板上能运行，可以应付老师的检查了</STRONG><FONT size=4><BR></FONT><FONT color=#1111ee>DSM 发表于 2006-10-16 19:55:00</FONT> </TD></TR>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt">题目要求：</SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt">1.</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt">主、支路无车时主干路“绿”；<SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt"> <SPAN lang=EN-US>2.</SPAN>若主、支路均有车时，主干路绿<SPAN lang=EN-US>45S,</SPAN>支路绿<SPAN lang=EN-US>25S,</SPAN>绿灯结束时黄灯亮<SPAN lang=EN-US>5S</SPAN>；<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt"> <SPAN lang=EN-US>3.</SPAN>主、支路传感器信号用按键传递，高电平表示有车。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 黑体">设计程序清单如下：<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT face="Times New Roman">LIBRARY IEEE;<BR>USE IEEE.STD_LOGIC_1164.ALL;<BR>USE IEEE.STD_LOGIC_UNSIGNED.ALL;<BR>ENTITY jtd IS<BR> PORT (clk,msensor,ssensor : IN STD_LOGIC;<BR> mr,mg,sr,sg : OUT STD_LOGIC ; --,showbt<BR> showbt : OUT STD_LOGIC_VECTOR (1 DOWNTO 0); --显示位控制<BR> mmy,ssy : BUFFER STD_LOGIC;<BR> show : OUT STD_LOGIC_VECTOR (6 DOWNTO 0)<BR> ); --show : OUT STD_LOGIC_VECTOR (6 DOWNTO 0) <BR>END jtd ;<BR>ARCHITECTURE one OF jtd IS<BR> TYPE state_type IS (A,B,C,D);<BR> SIGNAL state : state_type;<BR> SIGNAL secclk,yellowsec,my,sy : STD_LOGIC;<BR> SIGNAL showclk : STD_LOGIC_VECTOR (1 DOWNTO 0); --后加,LED显示时钟<BR> SIGNAL showdata1,showdata0 : INTEGER RANGE 0 TO 45;<BR> SIGNAL datasignal : INTEGER RANGE 0 TO 9;<BR> BEGIN<BR>getclk: PROCESS ( clk )<BR> VARIABLE clkcount : INTEGER RANGE 0 TO 2; --LED位扫描信号<BR> VARIABLE sclk : INTEGER RANGE 0 TO 600; --秒信号<BR> VARIABLE yellowcou : INTEGER RANGE 0 TO 200; --黄灯闪烁信号<BR> BEGIN<BR> IF clk'EVENT AND clk = '1' THEN<BR> clkcount := clkcount + 1;<BR> sclk := sclk + 1;<BR> yellowcou := yellowcou + 1;<BR> IF clkcount = 2 THEN<BR> showclk <= showclk + '1';<BR> END IF;<BR> IF sclk = 600 THEN<BR> secclk <= '1';<BR> ELSE secclk <= '0';<BR> END IF;<BR> IF yellowcou = 200 THEN<BR> yellowsec <= '1';<BR> ELSE yellowsec <= '0';<BR> END IF;<BR> END IF;<BR> END PROCESS getclk;<BR>jtdp: PROCESS (secclk) <BR> VARIABLE cnt : INTEGER RANGE 0 TO 45;<BR> VARIABLE nclr : BIT; --nclr低电平计数器清零<BR> BEGIN<BR> IF ( secclk'EVENT AND secclk = '1' ) THEN<BR> IF nclr = '0' THEN cnt := 0; --同步清零<BR> ELSE cnt := cnt + 1; --如果nclr不等于零，则计数<BR> END IF;<BR> --END IF;记住<BR> CASE state IS<BR> WHEN A => mr <= '0'; my <= '0'; mg <= '1'; --A状态，主干道绿灯mg亮<BR> sr <= '1'; sy <= '0'; sg <= '0'; showdata1 <= 45 - cnt; showdata0 <= 50 -cnt;<BR> IF ( msensor AND ssensor ) = '1' THEN<BR> IF cnt = 45 THEN<BR> state <= B; nclr := '0';<BR> ELSE state <= A; nclr := '1'; --继续状态A<BR> END IF;<BR> ELSIF (ssensor AND (NOT msensor)) = '1' THEN --若只有之路有车<BR> state <= B; nclr := '0';<BR> ELSE state <= A; nclr := '1'; --继续A状态<BR> IF cnt = 45 THEN cnt := 0; nclr := '0'; --防止计数超过45<BR> END IF;<BR> END IF;<BR> WHEN B => mr <= '0'; my <= '1'; mg <= '0'; --B状态，主干道黄灯my亮<BR> sr <= '1'; sy <= '0'; sg <= '0'; showdata1 <= 5 - cnt; showdata0 <=5 - cnt;<BR> IF cnt = 5 THEN<BR> state <= C; nclr := '0';<BR> ELSE state <= B; nclr := '1';<BR> END IF;<BR> WHEN C => mr <= '1'; my <= '0'; mg <= '0'; --C状态，之路绿灯sg亮<BR> sr <= '0'; sy <= '0'; sg <= '1'; showdata1 <= 30 - cnt; showdata0 <= 25 - cnt;<BR> IF ( msensor AND ssensor ) = '1' THEN<BR> IF cnt = 25 THEN<BR> state <= D; nclr := '0';<BR> ELSE state <= C; nclr := '1';<BR> END IF;<BR> ELSIF ssensor = '0' THEN --若之路无车<BR> state <= D; nclr := '0'; --则为D状态<BR> ELSE<BR> state <= C; nclr := '1';<BR> IF cnt = 25 THEN<BR> cnt := 0; nclr := '0';<BR> END IF;<BR> END IF;<BR> WHEN D => mr <= '1'; my <= '0'; mg <= '0'; --D状态，之路黄灯sy亮<BR> sr <= '0'; sy <= '1'; sg <= '0'; showdata1 <= 5 - cnt; showdata0 <= 5 - cnt;<BR> IF cnt = 5 THEN<BR> state <= A; nclr := '0';<BR> ELSE<BR> state <= D; nclr := '1';<BR> END IF;<BR> END CASE;<BR> END IF;<BR> END PROCESS jtdp;<BR> showp1: PROCESS ( showclk )<BR> VARIABLE data1,data0,data2,data3 : INTEGER RANGE 0 TO 9;<BR> BEGIN<BR> IF showdata1 >= 50 THEN --主路计数显示<BR> data1 := 5; data0 := showdata1 - 50;<BR> ELSIF showdata1 >= 40 THEN<BR> data1 := 4; data0 := showdata1 - 40;<BR> ELSIF showdata1 >= 30 THEN<BR> data1 := 3; data0 := showdata1 - 30;<BR> ELSIF showdata1 >= 20 THEN<BR> data1 := 2; data0 := showdata1 - 20;<BR> ELSIF showdata1 >= 10 THEN<BR> data1 := 1; data0 := showdata1 - 10;<BR> ELSE data1 := 0; data0 := showdata1;<BR> END IF;<BR> IF showdata0 >= 50 THEN<BR> data3 := 5; data2 := showdata0 - 50;<BR> ELSIF showdata0 >= 40 THEN<BR> data3 := 4; data2 := showdata0 - 40;<BR> ELSIF showdata0 >= 30 THEN<BR> data3 := 3; data2 := showdata0 - 30;<BR> ELSIF showdata0 >= 20 THEN<BR> data3 := 2; data2 := showdata0 - 20;<BR> ELSIF showdata0 >= 10 THEN<BR> data3 := 1; data2 := showdata0 - 10;<BR> ELSE data3 := 0; data2 := showdata0;<BR> END IF;<BR> </FONT></SPAN></P><SPAN lang=EN-US><FONT face="Times New Roman">
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><BR> CASE showclk IS<BR> WHEN "00" => showbt <= "00"; datasignal <= data2;<BR> WHEN "01" => showbt <= "01"; datasignal <= data3;<BR> WHEN "10" => showbt <= "10"; datasignal <= data0;<BR> WHEN "11" => showbt <= "11"; datasignal <= data1;<BR> WHEN OTHERS => NULL;<BR> END CASE;<BR> END PROCESS;<BR>showp2: PROCESS ( datasignal )<BR> BEGIN<BR> CASE datasignal IS<BR> WHEN 0 => show <= "0111111";<BR> WHEN 1 => show <= "0000110";<BR> WHEN 2 => show <= "1011011";<BR> WHEN 3 => show <= "1001111";<BR> WHEN 4 => show <= "1100110";<BR> WHEN 5 => show <= "1101101";<BR> WHEN 6 => show <= "1111101";<BR> WHEN 7 => show <= "0000111";<BR> WHEN 8 => show <= "1111111";<BR> WHEN 9 => show <= "1101111";<BR> WHEN OTHERS => NULL;<BR> END CASE;<BR> END PROCESS showp2;<BR>yellow: PROCESS (yellowsec)<BR> BEGIN<BR> IF yellowsec'EVENT AND yellowsec ='1' THEN<BR> IF my = '1' THEN<BR> mmy <= not mmy;<BR> END IF;<BR> IF sy = '1' THEN<BR> ssy <= not ssy;<BR> END IF;<BR> END IF;<BR> END PROCESS;<BR>END one;</FONT></SPAN></P></TD></TR></TBODY></TABLE><BR>
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