具有左轉(zhuǎn)功能的交通燈

1、精選優(yōu)質(zhì)文檔-傾情為你奉上交通燈系統(tǒng)框圖：根據(jù)設(shè)計要求和系統(tǒng)所具有的功能，并參考相關(guān)的文獻資料，經(jīng)行方案設(shè)計，可以畫出如下圖所示的交通信號燈控制器的系統(tǒng)框圖。 CLK 時鐘分頻模塊 交通燈控制及計時模塊 50MHZ 掃描顯示譯碼模塊 50MHZ 1HZ 50MHZ 數(shù)碼管及LED信號 數(shù)碼管段碼 數(shù)碼管位碼 LED顯示系統(tǒng)的狀態(tài)轉(zhuǎn)換圖如下所示：交通燈設(shè)計過程中總共只需要八個狀態(tài)即可完，設(shè)置A為主干道，B為支干道，則B路的紅燈時間要長于A路10秒，而綠燈時間則要縮短10s,詳細情況見下狀態(tài)圖。系統(tǒng)模塊圖如下所示：在用QUARTUS綜合后可得到詳細的原理圖，詳細情況見下：簡單仿真圖：用Models

2、im進行仿真，由于50MHZ分頻后，仿真圖上狀態(tài)轉(zhuǎn)換很難觀測，于是降低分頻系數(shù)，便于觀察從而得到近似的仿真結(jié)果，在下板子的過程中只需要將分頻系數(shù)改回原來的50MHZ 分頻即可。引腳分配：使用ALTERA的DE2-70來模擬交通燈過程，將引腳綁定，具體引腳分配詳見下圖：交通燈實物模擬圖：將編譯好的程序下載如DE2-70，模擬后得到如下圖：交通燈代碼：初始化模塊：module init_mod(reset,ared,ayellow,agreen,aleft,bred,byellow,bgreen,bleft); input reset; output7:0 ared,ayellow,agreen,

3、aleft,bred,byellow,bgreen,bleft; reg7:0 ared,ayellow,agreen,aleft,bred,byellow,bgreen,bleft; always(reset) /? if(!reset) begin ared<=8'b; /55s ayellow<=8'b; /5s agreen<=8'b; /40s aleft<=8'b; /15s bred<=8'b; /65s byellow<=8'b; /5s bgreen<=8'b; /30s ble

4、ft<=8'b; /15s endendmodule分頻模塊：module div_clk(CLK,reset,CLK_1HZ); input CLK,reset; output CLK_1HZ; reg CLK_1HZ; reg25:0count; always(posedge CLK or negedge reset) begin if(!reset) begin CLK_1HZ=0; count=0; end else if(count < 26'd) /?0.5s? begin count=count+1; /? end else begin count=0

5、; /? CLK_1HZ=CLK_1HZ; /?1s end end endmoduleA方向控制計數(shù)模塊：module traffic_A(CLK_1HZ,reset,ared,ayellow,agreen,aleft,lampa,numa); output3:0 lampa; output7:0 numa; input CLK_1HZ; input reset; input7:0 ared,ayellow,agreen,aleft; reg7:0 numa; /? reg tempa; /? reg2:0 counta; /? reg3:0 lampa; always(posedge CL

6、K_1HZ or negedge reset) / begin if(!reset) /? begin lampa<=4'b1000; counta<=0; tempa<=0; numa<=0; endelseif(!tempa) /? begin tempa<=1'b1; /? case(counta) /? 0:begin numa<=agreen;lampa<=4'b0100;counta<=1;end /? 1:begin numa<=ayellow;lampa<=4'b0010;counta&

7、lt;=2;end /? 2:begin numa<=aleft;lampa<=4'b0001;counta<=3;end /? 3:begin numa<=ayellow;lampa<=4'b0010;counta<=4;end /? 4:begin numa<=ared;lampa<=4'b1000;counta<=0;end /? default: lampa<=4'b1000; /? endcase end else /? begin if(numa>1) if(numa3:0=0) /?

8、0? begin numa3:0<=4'b1001; /?9 numa7:4<=numa7:4-1; /?1 end else numa3:0<=numa3:0-1; /?1 if(numa=2) tempa<=0; end end endmoduleB方向控制計數(shù)模塊：module traffic_B(CLK_1HZ,reset,bred,byellow,bgreen,bleft,lampb,numb); output3:0 lampb; output7:0 numb; input CLK_1HZ; input reset; input7:0 bred,bye

9、llow,bgreen,bleft; reg7:0 numb; /? reg tempb; /? reg2:0 countb; /? reg3:0 lampb; always(posedge CLK_1HZ or negedge reset) begin if(!reset) /? begin lampb<=4'b1000; countb<=0; tempb<=0; numb<=0; endelseif(!tempb) /? begin tempb<=1; /? case(countb) /? 0:begin numb<=bred;lampb<

10、=4'b1000;countb<=1;end /? 1:begin numb<=bgreen;lampb<=4'b0100;countb<=2;end /? 2:beginnumb<=byellow;lampb<=4'b0010;countb<=3;end 3:begin numb<=bleft;lampb<=4'b0001;countb<=4;end /? 4:beginnumb<=byellow;lampb<=4'b0010;countb<=0;end default la

11、mpb<=4'b1000; endcase end else /? begin if(numb>1) if(numb3:0=0) /?0? begin numb3:0<=4'b1001 ; /?9 numb7:4<=numb7:4-1; /?1 end else numb3:0<=numb3:0-1; /?1 if(numb=2) tempb<=0; end end endmodule顯示模塊：module display(in4,out8); output7:0out8; input3:0in4; reg7:0out8; always(in

12、4) /? begincase(in4) 4'h0:out8=8'hc0; 4'h1:out8=8'hf9; 4'h2:out8=8'ha4; 4'h3:out8=8'hb0; 4'h4:out8=8'h99; 4'h5:out8=8'h92; 4'h6:out8=8'h82; 4'h7:out8=8'hf8; 4'h8:out8=8'h80; 4'h9:out8=8'h90; 4'ha:out8=8'h88; 4

13、9;hb:out8=8'h83; 4'hc:out8=8'hc6; 4'hd:out8=8'ha1; 4'he:out8=8'h86; 4'hf:out8=8'h8e; endcaseendendmodule頂層模塊：module traffic(CLK,reset,lampa,lampb,out8_a_h,out8_a_l,out8_b_h,out8_b_l); input CLK; input reset; output3:0lampa,lampb; output7:0out8_a_h,out8_a_l,out8_b_

14、h,out8_b_l; wire7:0ared,ayellow,agreen,aleft,bred,byellow,bgreen,bleft; wire CLK_1HZ; wire7:0numa_m,numb_m; /* ? */init_modQ1(.reset(reset),.ared(ared),.ayellow(ayellow),.agreen(agreen),.aleft(aleft),.bred(bred),.byellow(byellow),.bgreen(bgreen),.bleft(bleft); div_clk Q2(.CLK(CLK),.CLK_1HZ(CLK_1HZ),.reset(reset); traffic_A Q3(.CLK_1HZ(CLK_1HZ),.reset(reset),.ared(ared),.ayellow(ayellow),.agreen(agreen),.aleft(aleft),.lampa(lampa),.numa(numa_m); traffic_B Q4(.CLK_1HZ(CLK_1HZ),.reset(reset),.bred(bred),.byellow(byellow),.bgreen(bgreen),.bleft(bleft)