在quartus2的基础上，使用VHDL语言编写简易交通灯，描述十字路口的交通灯情况，分为主次通道，次通道没车，主干道一直绿灯，次干道有车，按正常灯亮。-In quartus2, based on the use of VHDL language simple traffic lights, traffic lights crossroads described, divided into primary and secondary channel, the second channel had no car, the green light has been the main road and secondary roads with cars, according to the normal lights.