目录 1课程设计要求·····································································3 2 电路功能描述····································································3 3 设计方案·············································································3 4设计原理图··········································································4 5 VHDL语言············································································4 6仿真截图···············································································6 7心得体会···············································································11 8参考文献···············································································11 1 1. 课程设计要求 1.1.红、黄、绿灯分别控制显示； 1.2.每一个状态分别分配一个时间显示（两位十进制，倒计时）； 1.3.符合实际交通规律。 2.电路功能描述 本设计是实现交通灯的控制，模拟实现了红、绿、黄灯指挥交通的功能。本设计适用东西和南北方向的车流量大致相同的路口，红灯显示时间 30S，绿灯显示时间 25S，黄灯显示时间 5S，同时用数码管指示当前的状态（红、绿、黄灯）的剩余时间。当有紧急状况发生时，两个方向都禁止通行，并且显示红灯，当紧急状况解除后，重新计时并且指示时间。 3.设计方案 根据设计要求，需要控制显示红、黄、绿三个灯的亮灭状态及显示的时间。这个设计主要由两部分组成，红黄绿灯的显示模块，显示时间模块。由实际的交通情况可知，东西方向的显示情况是一致的，南北方向的显示情...
