实现交通灯的状态机，用Verilog HDL编程，西林…

代码说明：

交通灯状态机的实现，用verilog HDL编程，Xilinx ISE 6仿真，在实际电路中得到验证．-traffic lights to achieve the state machine, with verilog HDL programming, Xilinx ISE 6 simulation, the actual circuit have been tested.