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Pack:2811 - Directed packing was unable to obey the user design constraints (LOC=G14) which requires the combination of the symbols listed below to be packed into a single IOB component.
The directed pack was not possible because: There is more than one pad symbol.
The symbols involved are:
BUF symbol "BCOUNT_2_OBUF" (Output Signal = BCOUNT<2>)
PAD symbol "BCOUNT<2>" (Pad Signal = BCOUNT<2>)
PAD symbol "ACOUNT<2>" (Pad Signal = ACOUNT<2>)
map报错
.v文件
module traffic(CLK,EN,LAMPA,LAMPB,ACOUNT,BCOUNT);
//端口说明
output[7:0] ACOUNT,BCOUNT;
output[3:0] LAMPA,LAMPB;
input CLK,EN;
//内部信号说明
reg[7:0] numa,numb; //ACOUNT和BCOUNT的内部信号
reg tempa,tempb;
reg[2:0] counta,countb; //方向A和方向B的灯的状态
reg[7:0] ared,ayellow,agreen,aleft,bred,byellow,bgreen,bleft;
reg[3:0] LAMPA,LAMPB;
//设置各交通灯的持续时间初始化值，红灯的值由另一个方向的黄灯和绿灯计算得出。
always @(EN)
if(!EN) begin //使能信号EN无效时，对交通灯的计数值进行初始化
ared <=8'd55; //55 秒 = 30 + 5 + 15 + 5
ayellow <=8'd5; //5 秒
agreen <=8'd40; //40 秒
aleft <=8'd15; //15 秒
bred <=8'd65; //65 秒 = 40 + 5 + 15 + 5
byellow <=8'd5; //5 秒
bleft <=8'd15; //15 秒
bgreen <=8'd30; //30 秒
end
assign ACOUNT=numa; //8位数码管输出
assign BCOUNT=numb; //8位数码管输出
//控制A方向四种灯的模块
always @(posedge CLK) begin
if(EN) begin //使能有效时，交通灯开始工作
if(!tempa) begin
tempa<=1;
case(counta) //控制灯状态的顺序
0: begin //状态0
numa<=agreen; //直行绿灯亮
LAMPA<=2; //输出0010
counta<=1; //进入下一个状态
end
1: begin //状态1
numa<=ayellow; //黄灯亮
LAMPA<=4; //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<=1; //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; //输出0100
counta<=4; //进入下一个状态
end
4: begin //状态4
numa<=ared; //红灯亮
LAMPA<=8; //输出1000
counta<=0; //进入下一个状态（状态0）
end
default: //默认状态
LAMPA<=8; //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
//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
.UCF文件
NET "CLK" LOC=B8;
NET "EN" LOC=B18;
NET "LAMPA<0>" LOC=J14;
NET "LAMPA<1>" LOC=J15;
NET "LAMPA<2>" LOC=K15;
NET "LAMPA<3>" LOC=K14;
NET "LAMPB<0>" LOC=E17;
NET "LAMPB<1>" LOC=P15;
NET "LAMPB<2>" LOC=F4;
NET "LAMPB<3>" LOC=R4;
NET "ACOUNT<7>" LOC=F17;
NET "ACOUNT<6>" LOC=L18;
NET "ACOUNT<5>" LOC=F18;
NET "ACOUNT<4>" LOC=D17;
NET "ACOUNT<3>" LOC=D16;
NET "ACOUNT<2>" LOC=G14;
NET "ACOUNT<1>" LOC=J17;
NET "ACOUNT<0>" LOC=H17;
NET "BCOUNT<7>" LOC=R17;
NET "BCOUNT<6>" LOC=L18;
NET "BCOUNT<5>" LOC=F18;
NET "BCOUNT<4>" LOC=D17;
NET "BCOUNT<3>" LOC=D16;
NET "BCOUNT<2>" LOC=G14;
NET "BCOUNT<1>" LOC=J17;
NET "BCOUNT<0>" LOC=H17;
NET "CLK" CLOCK_DEDICATED_ROUTE = FALSE;
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