Design a controller for a traffic light intersection. Basic requirements: north-south direction things and have a group of red, yellow, green light for directing traffic, red, yellow and green are the duration of 25s, 5s, 20s. When there is an emergency situation (such as fire engines), the two directions are the red light, time stops, when the end of special circumstances, the controller to restore the original state of work. A set of digital control, the countdown is displayed in both directions to allow access or prohibit the passage of time.

实验03--交通灯控制器的设计与实现.doc

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