Verlilog 交通灯编译代码麻烦大家帮我看下什么错误

weixin_47640532 2022-04-26 21:30:31

//交通灯控制器

module traffic(clk,en,lampa,lampb,acount,bcount);

output [3:0] acount;
output [3:0] bcount;

input clk;
input en;

output [3:0] lampa;
output [3:0] lampb;

reg [10:0]numa;
reg [10:0]numb;
reg [7:0] ared;
reg [7:0] ayellow;
reg [7:0] agreen;
reg [7:0] aleft;
reg [7:0] bred;
reg [7:0] byellow;
reg [7:0] bgreen;
reg [7:0] bleft;
reg [3:0] lampa;
reg [3:0] lampb;

wire [2:0] counta;
wire [2:0] countb;
//将numa 和 numb的信号传递给数码管输出(即数码管显示交通灯计时情况)
assign acount=numa;
assign bcount=numb;
//信号en为低位时对各个交通灯的计数值进行初始化
always @(en)begin
    if(!en)begin
        ared<=8'd55;
        ayellow<=8'd5;
        agreen<=8'd40;
        aleft<=8'd15;
        bred<=8'd65;
        byellow<=8'd5;
        bleft<=8'd15;
        bgreen<=8'd30;
    end
end
//在en有效的情况下判断tempa的值为1 则表示不在变化状态为零则表示在变化状态在变化状态判断counta 的四个状态决定哪盏交通灯亮
   always @(posedge clk)begin
      if(en)begin
        if(!tempa)begin
            tempa<=1;
            case(counta)
                0:begin
                    numa=agreen;
                    lampa<=4'b0010;
                    counta<=1;
                end
                1: begin               //状态1
                   numa=ayellow;   //黄灯亮
                   lampa<=4'b0100;           //输出0100
                   counta<=2;       //进入下一个状态
                    end
                    2: begin               //状态2
                   numa=aleft;       //左转绿灯亮
                   lampa<=4'b0001;           //输出0001
                   counta<=3;       //进入下一个状态
                    end
               3: begin               //状态3
                   numa=ayellow;   //黄灯亮
                   lampa<=4'b0100;       //输出0100
                   counta<=4;       //进入下一个状态
                    end
               4: begin           //状态4
                   numa=ared;       //红灯亮
                   lampa<=4'b1000;   //输出1000
                   counta<=0;       //进入下一个状态（状态0）
                    end
               default:           //默认状态
                   lampa<=4'b1000;   //红灯亮，输出1000
           endcase
       end
       else begin                    //每一个状态的倒计时
           if(numa>1)               //判断倒计时未归零时分别对高地位进行递减
               if(numa[3:0]==0) begin
                   numa[3:0]=4'b1001;
                   numa[7:4]<=numa[7:4]-1;
               end
               else
                   numa[3:0]=numa[3:0]-1;
           if (numa==2)
               tempa<=0;       //倒计时结束，返回灯状态变化判断，将进入下一个状态
       end
   end
   else begin
       lampa<=4'b1000;       //使能无效时，红灯亮
       counta<=0;           //返回方向A的状态0(绿灯状态)
       tempa<=0;               //进入状态变化判断
   end
end
endmodule

       //控制B方向四种灯的模块，模块的语言描述与方向A的描述基本一致，这里不再重复注释，
       always @(posedge clk)begin
           if (en) begin
               if(!tempb) begin
                   tempb<=1;
                   case (countb)
                       0: begin
                           numb<=bred;
                           lampb<=8;
                           countb<=1;
                       end
                       1: begin
                           numb<=bgreen;
                           lampb<=2;
                           countb<=2;
                       end
                       2: begin
                           numb<=byellow;
                           lampb<=4;
                           countb<=3;
                       end
                       3: begin
                           numb<=bleft;
                           lampb<=1;
                           countb<=4;
                       end
                       4: begin
                           numb<=byellow;
                           lampb<=4;
                           countb<=0;
                       end
                       default:
                           lampb<=8;
                   endcase
               end
               else begin //倒计时
                   if(numb>1)
                       if(!numb[3:0]) begin
                           numb[3:0]<=9;
                           numb[7:4]<=numb[7:4]-1;
                       end
                   else
                       numb[3:0]<=numb[3:0]-1;
                   if(numb==2)
                       tempb<=0;
               end
           end
           else begin
               lampb<=4'b1000;
               tempb<=0;
               countb<=0;
           end
       end
endmodule