Verilog实验报告交通灯

1、Verilog实验报告第四次交通灯班级：集电0802班:鹏学号：04086057序号： 16、规(1) 具有开关功能：当reset二0时红绿灯关闭，使主支干道六个灯全灭；(2) 具有四个功能：当resell旦func二2, bOO时，主干道和支路正常计数；旦func二2' b01时，支干道一直绿灯，主干道一直 红灯；旦func二2' blO时，主干道一直绿灯，支干道一直 红灯；旦func二2, bll时，主干道和支干道一直黄灯闪；(3) 计数器频率：运行频率2Hz计数器；(4) 信号灯种类：红、黄、绿；(5) 信号灯计执行时间关系：主干道：绿灯常亮+绿灯闪+黄灯二支干道：红灯常

2、亮; 此设计中：主干道：绿灯常亮二57s,T绿灯闪二3s,T黄灯亮二3s支干道：绿灯常亮二】5s,T绿灯闪二3s,T黄灯亮二3s(6) 信号灯到计时功能：信号灯预責后，开始执行2Hz计数器；(7) 信号灯跳转功能：当各信号灯计时至T时在下一个时钟信号上升沿到来时自动 转为下一状态；(8) 信号灯各状态跳转关系：绿-黄-红-绿；二、输入输出定义resetclk, funcl:0 ,greenl :0,red 1:0,yellow】:0倍号名宽度输入/输出簣脚描述reset1inputL13红绿灯总开关dk1inputC9freq:50MHzfunc2in putN17/H18控制红绿灯功能gre

3、en 11outputDll主绿green 01outputEll支绿redl1outputFll主红redO1outputF12支红yellowl1outputCll主黄yellow01outputE12支黄三、模块设计resetelkfunc2:0状态转移图:reset=l;reset=1;reset=l;reset=1; func=OO;四、测试代码module frequency_divider_small(resetzclk,out); 重写一个小分频模块测试交通灯主 模块功能input reset.dk;output out;reg 1:0 temp;reg out;always

4、(posedge elk or negedge reset) if ('reset)temp<=2lb00;else temp<=(temp=2,bl 1 )?2,b00:temp+2,b01;always (temp) out=(temp=2'bl 1);endmodulemodule testjrafficight;reg resetclk;reg 1:0 tunc;wire 1:0 green;wire 1:0 red;wire 1:0 yellow;trafficjigh tsimulati on (.reset (reset) z. elk (elk) z

5、 .f u nc(fun c)z.gree n(green), .red (red) .yellowfyellow ):always #10 elk二elk;initialbeginreset=O;clk=l;func=2'b00;#20 reset=l;#21000 func=2b01;#10000 func=2bl0;#10000 func=2*bll;endendmodule波形：° 八M.h小 jlgh心很<*5上4 ba.h/ij： JrAin4#>5n'TircP P) 10StiMSOso01in10f Jin幻 i?cm卩IS&丄皿

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7、module frequencydivider(resetclkzout);/分频模块，把 50MHz 时钟分成半秒计时器 input reset.dk;output out;reg 5:0 moll,mol2;reg 6:0 mol3zmol4;reg outl,out2.out3Qut;always (posedge elk or negedge reset)/把 25000000 分成 40*40*125*125 if(!reset)moll<=6'd0;elsemoll <=(moll 二二 6639) ?6'd0:mol 1 +6'd 1;alwa

8、ys (posedge elk or negedge reset)if(!reset)mol2<=6*d0;else if(outl)mol2<=(mol2=6,d39)?6,d0:mol2+6,d 1;always (posedge elk or negedge reset)if(!reset)mol3<=7*d0;else if(out2)mol3<=(mol3=7,d 124)?7'd0:mol3+7'd 1;always (posedge elk or negedge reset)if(!reset)mol4<=7'd0;else

9、if(out3)mol4<=(mol4=7,d 124)7ld0:mo4+7ld 1;always (moll or mol2or mol3 or mol4)beginoutl=(moll=6'd39);out2= (mol2=6,d39) &&outl);out3= (mol3=7,d 124)&&out2);out= (mol4=7'd 124)&&o ut3);endendmodulemodule trafficjightlresetclkjuncgreenjed.yellow); 交通灯主模块input resetc

10、lk;input 1:0 func;output 1:0 greenjed.yellow;reg 1:0 greeruectyellow;reg 2:0 state;reg 6:0t;wire in;parameter greentime 1=657;/主干道绿灯时间parameter greentime0=6,d27;/支干道绿灯时间parameter yellowtime二303;/黄灯时间，绿灯闪时间 frequency.divider fenpi n(reset(reset),clk(clk),.out(in); 调用分频模块 always (posedge elk or negedg

11、e reset)if(!reset)begi ntv 二 760;state<=3'dl;green<=2,b00;red<=2*b00;yellow<=2'b00;endelseif(in)/分频器结果当主模块始能if(func=2'b00)选择不同功能控制开关if(cnt=7'dO)case (state)/选择不同状态3'dl:begintv 二 gree ntimel vv；state<=3fd2;green<=2*bl0;red<=2'b01;yellow<=2'b00;end3*

12、d2:begintv 二 yellowtimevvi； state<=3,d3;end3'd3:begint<=yellowtime«l; state<=3*d4; green<=2*b00; red<=2,b01; yellow<=2,bl0;end3*d4:begintv 二 gree ntimel vv；state<=3'd5;green<=2'b01;red<=2*bl0; yellow<=2,b00; end3*d5:begint<=yellowtime«l; state&l

13、t;=3*d6;end3*d6:begint<=yellowtime«l;state<=3,dl;green<=2'b00;red<=2*bl0; yellow<=2'b01;endendcaseelsebegi nt<=cnt-7'dl;/倒计数，计数结束进入下一状态 case(state)3'd3:greenl<=cnt0;/主干道绿灯闪3'd6:green0<=cnt0;/支干道绿灯闪 endcaseendelse if(func=2'b】0)主干道常绿，支干道常红 begi ntv 二 0;state<=3*d 1; gree* 二 2b 10;red<=2*b01; yellow<=2'b00;endelse ifffunc'bOl)/主干道常红，支干道常绿 begi nt< 二 0;state<=3'd 1;gree nv