这是一个vhdl的交通灯程序，可以实现两个方向间红、黄、绿灯之间的亮灭转换，同时还有秒表的计数、显示功能，为学习vhdl的人提供一定的技术参考。-This is a vhdl traffic lights procedures can be achieved between the two directions of red, yellow, green light off between the conversion, as well as the stopwatch count, display, provide a technical reference for learning vhdl person.