实现基本交通灯的功能，Xilinx Spartan-3E实验板上基于verilog控制主干道和支干道东西南北两组交通灯LED的操控。-To achieve the basic function of the traffic lights, Xilinx Spartan-3E experiment board based on verilog control the handling of the North and South, East and West of the main roads a