Description: School campus to be in a busy academic path (A) and cultural route (C) the installation of traffic lights at the crossroads, and a detector TA and TC. When you press the reset button RST, academic road the green light, red light on the road culture. Every five seconds, the controller checks the output of the sensor academic way, if someone academic way, the light does not change, if someone academic way, the light turns yellow, 5 seconds, and then a red light, and the way to distinguish culture green light. In this state, every 5 seconds, the controller checks whether the way culture was, if anyone, to keep the green light, if no one, this road becomes yellow, 5 seconds, and then a red light. Period of 5 seconds the state machine clock signal
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