本实验主要模拟位于十字路口的交通灯，十字路口的交通灯分为横向和纵向两

个方向，每个方向上面的交通灯有红灯亮，黄灯亮，绿灯亮三种状态。它们之间状

态的关系如上面的表格所示。

上面各个状态是连续循环变化的，可以由状态机来实现，每两个状态之间的间

隔要在10 秒左右（实验板上面的时钟频率是50MHz）。

交通灯的三种状态用实验板上的三个LED 灯表示，两个方向一共要使用六个

LED。

-Simulation of this experiment is located at the crossroads of major traffic lights, traffic lights at the crossroads of divided into two horizontal and vertical direction, each direction of traffic lights are above the red light, yellow light, green light three states. The relationship between them such as the state indicated in the table above. Above all the state is a continuous cycle of change can be achieved by the state machine, each state of the interval between the two in 10 seconds or so (the above board is the clock frequency of 50MHz). The three states of traffic lights on the board with the experiment said the three LED lights in both directions to use a total of six LED.