【正文】 UT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “001” =主綠支紅狀態(tài) 點(diǎn)亮支干道個(gè)位數(shù)字 OK CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “010” =主綠支紅狀態(tài) 點(diǎn)亮主干道十位數(shù)字 OK CASE CNTIN IS WHEN “000000” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “011” =主綠支紅狀態(tài) 點(diǎn)亮主干道個(gè)位數(shù)字 OK CASE CNTIN IS WHEN “000000” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN OTHERS = NULL。WHEN “01” =主黃支紅狀態(tài) OK CASE BITSEL IS WHEN “000” =主黃支紅狀態(tài) 點(diǎn)亮支干道十位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “001” =主黃支紅狀態(tài) 點(diǎn)亮支干道個(gè)位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “010”=主黃支紅狀態(tài) 點(diǎn)亮主干道十位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN“011” =主黃支紅狀態(tài) 點(diǎn)亮主干道個(gè)位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN OTHERS = NULL。WHEN “10” =支綠主紅狀態(tài) OK CASE BITSEL IS WHEN “000” =支綠主紅狀態(tài) 點(diǎn)亮支干道十位數(shù)字 OK CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “001” =支綠主紅狀態(tài) 點(diǎn)亮支干道個(gè)位數(shù)字 OK CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “010” =支綠主紅狀態(tài) 點(diǎn)亮主干道十位數(shù)字 OK CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN“011” =支綠主紅狀態(tài) 點(diǎn)亮主干道個(gè)位數(shù)字 OK CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN OTHERS = NULL。WHEN “11” =支黃主紅狀態(tài) OK CASE BITSEL IS WHEN “000” =支黃主紅狀態(tài) 點(diǎn)亮支干道十位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “001” =支黃主紅狀態(tài) 點(diǎn)亮支干道個(gè)位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “010” =支黃主紅狀態(tài) 點(diǎn)亮主干道十位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN “011” =支黃主紅狀態(tài) 點(diǎn)亮主干道個(gè)位數(shù)字 CASE CNTIN IS WHEN “000001” = LED7SOUT LED7SOUT LED7SOUT LED7SOUT LED7SOUT NULL。WHEN OTHERS = NULL。END CASE。END behav。兩路信號(hào)時(shí)間分別為：V:綠燈（30S）H:紅燈（35S）黃燈（5s）綠燈（30S）紅燈（35S）黃燈（5S）二，實(shí)驗(yàn)步驟 建立工程可在歡迎界面點(diǎn)擊“Creat a New Project”進(jìn)入工程建立界面，亦可關(guān)閉歡迎界面，點(diǎn)擊菜單欄的“File”，點(diǎn)擊“New Project Wizard”進(jìn)入建立工程界面。在此界面選定工程路徑，取好工程名，點(diǎn)擊“Next”。一直點(diǎn)擊“Next”進(jìn)入器件設(shè)置界面，DE270開發(fā)工具采用的Cyclone II系列的EP2C70F896C6N。代碼如下：module traffic(Clk_50M,Rst,LedR_H,LedG_H,LedY_H,LedR_V,LedG_V,LedY_V,Seg7_VH,Seg7_VL,Seg7_HH,Seg7_HL,led15)。b00。b01。b10。b11。output LedR_H,LedG_H,LedY_H,LedR_V,LedG_V,LedY_V。output led15。reg [31:0] Cnt_1Hz。reg[7:0] CntDis,CntDiss。always(posedge Clk_1Hz)beginendbeginCnt_1HzClk_1HzendelseCnt_1Hzcase(state)S1:endalways(posedge Clk_1Hz)begincase(stateV)S1:beginif(CntV=30)CntVbeginif(Cnt30=30)Cnt30elseCnt30beginif(Cnt30=5)Cnt30elseCnt30beginif(Cnt30=30)Cnt30elseCnt30beginif(Cnt30=5)Cnt30elseCnt30elseCntVS2: beginendend if(CntV=5)CntVelseCntVS3:beginif(CntV=35)CntVelseCntVcase(stateH)S1:endalways(negedge Clk_50M or negedge Rst)beginbeginif(CntH=35)CntHelseCntHS2:beginif(Cnt