我用周公的easy430fpga actel公司的，编写交通灯程序（该程序是夏宇闻老师书上的，有点改动）后，前仿真能出现波形，但总是综合错误，望高手指点，程序如下：
// traffic_light.v
module traffic_light(red,h,green,syclk);
input syclk;
output red,h,green;
reg red,h,green,clk;
reg[31:0] rt,gt,ht;
reg[25:0] count;
parameter on = 0,off = 1;
initial red = off;
initial h = off;
initial begin green = off;clk = 0 ; count=0;rt = 5;gt = 4;ht = 2; end
always
begin
red = on;
light(red,rt);
h = on;
light(h,ht);
green = on;
light(green,gt);
end
task light;
inout color;
input[31:0] delay_time;
begin
repeat(delay_time)
@(posedge clk);
color = off;
end
endtask
always @(posedge syclk)
begin
if(count==26'd12000000)
begin
count = 0;
clk = ~clk;
end
else
begin
count = count + 1'd1;
end
end
endmodule |
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过来学习的，谢谢！
