基于VHDL语言的交通灯设计:通过状态机设计实现交通灯的红黄绿三种灯显示.其功能包括:红绿黄灯显示,倒计时功能,测试功能,手动控制功能.-Based on VHDL design of traffic lights: red, yellow, and green traffic lights, three lights through the state machine design features include: red, green, yellow, countdown function