專(zhuān)題九：紅綠交通燈控制系統(tǒng)

專(zhuān)題九：紅綠交通燈控制系統(tǒng)(一）時(shí)鐘發(fā)生電路（CLK_GEN）1KHzRESETCLK_1HzFLSH_1Hz專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第1頁(yè)!（二）紅綠黃燈秒計(jì)數(shù)選擇控制電路（traffic_mux）8LOADRESETCLK_1HzRECOUNTSIGN_STATE[1..0]traffic_muxSING_STATE:

00綠燈20秒（橫向路口）

01黃燈5秒（橫向路口）

10綠燈20秒（直向路口）

11黃燈5秒（直向路口）RECOUNT:重新計(jì)數(shù)信號(hào)。＝‘１’，發(fā)送倒計(jì)時(shí)時(shí)間數(shù)據(jù)；＝‘０’，正常倒計(jì)時(shí)；專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第2頁(yè)!LIBRARYIEEE;USEIEEE.std_logic_1164.all;USEIEEE.std_logic_unsigned.all;USEIEEE.std_logic_arith.all;entitytraffic_muxisport(reset,clk_1Hz,recount:instd_logic;sign_state:instd_logic_vector(1downto0);load:outintegerrange255downto0);end;專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第3頁(yè)!beginprocess(reset,clk_1s)beginifreset='1'thenload<="00000000";elsif(clk_1Hz'eventandclk_1Hz='1')thenifrecount='1‘thenCASEsign_stateISWHEN"00"=>load<=20;

WHEN"01"=>load<=5; WHEN"10"=>load<=20;

WHEN"01"=>load<=5;WHENOTHERS=>null;ENDCASE;endif;endif;endprocess;endBEHAVIOR;專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第4頁(yè)!libraryIEEE;useIEEE.std_logic_1164.all;useIEEE.std_logic_arith.all;useIEEE.std_logic_unsigned.all;entitycount_downisport(reset,clk_1Hz:instd_logic;recount:instd_logic;load:inintegerrange255downto0;seg7:outstd_logic_vector(15downto0);next_state:outstd_logic);end;

專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第5頁(yè)!process(cnt_ff)begincasecnt_ffiswhen0=>seg7<="0011111100111111";when1=>seg7<="0011111100000110";when2=>seg7<="0011111101011011";when3=>seg7<="0011111101001111";when4=>seg7<="0011111101100110";when5=>seg7<="0011111101101101";when6=>seg7<="0011111101111101";when7=>seg7<="0011111100000111";when8=>seg7<="0011111101111111";when9=>seg7<="0011111101111011";when10=>seg7<="0000011000111111";when11=>seg7<="0000011000000110";when12=>seg7<="0000011001011011";when13=>seg7<="0000011001001111";

when14=>seg7<="0000011001100110";when15=>seg7<="0000011001101101";when16=>seg7<="0000011001111101";when17=>seg7<="0000011000000111";when18=>seg7<="0000011001111111";when19=>seg7<="0000011001111011";when20=>seg7<="0101101100111111";when21=>seg7<="0101101100000110";when22=>seg7<="0101101101011011";when23=>seg7<="0101101101001111";

when24=>seg7<="0101101101100110";when25=>seg7<="0101101101101101";when26=>seg7<="0101101101111101";when27=>seg7<="0101101100000111";when28=>seg7<="0101101101111111";when29=>seg7<="0101101101111011";whenothers=>seg7<="0011111100111111";endcase;endprocess;next_state<='1'whencnt_ff=1else'0';endBEHAVIOR;專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第6頁(yè)!紅綠燈狀態(tài)：STATE狀態(tài)LIGHT狀態(tài)0紅0，綠1R0G1010010狀態(tài)1紅0，黃1R0Y1011000狀態(tài)2綠0，紅1G0R1100001狀態(tài)3黃0，紅1Y0R1100100狀態(tài)4黃0，黃1Y0Y1110000狀態(tài)5黃0，綠1Y0G1110000狀態(tài)6綠0，黃1G0Y1110000狀態(tài)7紅0，紅1R0R1110000LIGH組合方式：RED1

RED0

YELLOW1

YELOOW0

GREEN1

GREEN0專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第7頁(yè)!architectureBEHAVIORoftraffic_FSMistypeSreg0_typeis(r0g1,r0y1,g0r1,y0r1,y0y1,y0g1,g0y1,r0r1);signalstate:Sreg0_type;signallight:std_logic_vector(5downto0);begin

if(reset='1')thenstate<=r0g1;

----設(shè)定當(dāng)前為橫向紅燈亮，豎向綠燈亮sign_state<=“01”;------選擇20秒倒計(jì)時(shí)recount<=‘1’;

------裝入計(jì)數(shù)初值并啟動(dòng)倒計(jì)時(shí)elseif(clk'eventandclk='1')thencaseSTATEiswhenr0g1=>if(a_m='1'andclk_1Hz='1')thenif(next_state=‘1’)then

--當(dāng)前計(jì)數(shù)完畢，轉(zhuǎn)入下一種計(jì)時(shí)recount<='1';state<=r0y1;sign_state<="01";elserecount<=‘0’;state<=r0g1;----否則，繼續(xù)倒計(jì)時(shí)endif;

專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第8頁(yè)!

wheny0r1=>--nowstate:green0onred1onif(a_m='1'andena_1Hz='1')thenif(next_state='1')thenrecount<='1';state<=r0g1;sign_state<="00";elserecount<='0';state<=y0r1;--red=2'b10;green=2'b00;yellow=2'b01;endif;

whenothers=>state<=r0g1;recount<='0';sign_state<="00";endcase;endif;endif;endprocess;

專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第9頁(yè)!（三）倒計(jì)時(shí)控制電路（count_down）Clk_1Hzresetrecountload倒計(jì)時(shí)初值cnt_ff倒計(jì)時(shí)輸出Next_state計(jì)時(shí)完畢，輸出一個(gè)脈沖信號(hào)，控制電路進(jìn)入下一個(gè)計(jì)時(shí)狀態(tài)。count_down倒計(jì)時(shí)存儲(chǔ)器、計(jì)數(shù)器倒計(jì)時(shí)初值裝入控制信號(hào)譯碼器SEG7[15..0]七段顯示器cnt_ff：內(nèi)部存儲(chǔ)器專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第10頁(yè)!architectureBEHAVIORofcount_downissignalcnt_ff:integerrange255downto0;beginprocess(clk_1Hz,reset)beginif(reset='1')thencnt_ff<="00000000";seg7<="0000000000000000";elsif(clk_1Hz'eventandclk_1Hz='1')thenifrecount='1‘thencnt_ff<=load-1;elsecnt_ff<=cnt_ff-1;endif;endif;

endprocess;專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第11頁(yè)!（四）紅綠燈信號(hào)控制電路（traffic_fsm）recountSing_state0Sing_state1RED0RED1GREEN0GREEN1YELLOW0YELLOW1CLK_1HzRESETFLASH_1HZNEXT_STATEtraffic_fsmLIGHT:紅綠燈狀態(tài)A_MLIGH組合方式：RED1

RED0

YELLOW1

YELOOW0

GREEN1

GREEN0RED0YELOOW0GREEN0RED1YELLOW1GREEN1REDYELLOWGREEN專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第12頁(yè)!LIBRARYIEEE;USEIEEE.std_logic_1164.all;USEIEEE.std_logic_arith.all;USEIEEE.std_logic_unsigned.all;entitytraffic_FSMisport(reset,clk,clk_1Hz,flash_1Hz:instd_logic;a_m:instd_logic;next_state:instd_logic;recount:outstd_logic;sign_state:outstd_logic_vector(1downto0);red:outstd_logic_vector(1downto0);green:outstd_logic_vector(1downto0);yellow:outstd_logic_vector(1downto0));end;專(zhuān)題九：紅綠交通燈控制系統(tǒng)共15頁(yè)，您現(xiàn)在瀏覽的是第13頁(yè)!whenr0y1=>--nowstate:red0onyellow1flashif(a_m='1'andclk_1Hz='1')thenif(next_state='1')thenrecount<='1';state<=g0r1;sign_state<="10";elserecount<='0';state<=r0y1;endif;wheng0r1=>--nowstate:green0onred1onif(a_m='1'andena