eda课程，包括数码管显示，可变步长计数器的编写-eda courses, including digital display, variable-step preparation of counter

EDA交通灯程序.学习利用计数器和状态机设计十字路*通灯控制器。设计一个简单十字路*通灯控制器。该控制器控制甲乙两道的红、黄、绿三色灯，指挥交通和行人安全通行。-EDA traffic lights program. Learning to take advantage of the counter and state machine design crossroads traffic light controller. Design a simple crossroads traffic