该文件包括全部的交通信号灯控制的VHDL源代码以及顶层原理图的设计，七种恰当的采用了状态机，功能完全正确而稳定。-This document includes all of the traffic lights controlled by the top-level VHDL source code, as well as schematic design, the appropriate use of the seven kinds of state machines, function en