说明：  实例制作的一个有关交通灯的VHDL代码，从各模块到顶层文件的代码一一列出，详细周到，附带仿真波形图和芯片管脚锁定的相关内容，绝对物超所值。
(produced an example of the traffic light VHDL code, from the module to the top of the document sets out a code on January 1, thoughtful details, fringe simulation waveform map and Chip lock the relevant content absolute value for money.)