基于AT89C51的十字路口交通灯设计

为了更加合理地调配道路通行能力，真实模拟十字路口的交通信号管理，以Atme189C51为核心芯片，设计了基于AT89C51的十字路口交通灯管理系统。介绍了硬件系统信号灯及按钮电路设计、时间显示电路设计、显示原理和单片机基本系统。系统的软件包括主程序、显示子程序和定时器溢出中断服务程序3个部分。实践证明：该系统合理地选择了系统的构成方案，划分了硬件和软件的功能，有利于兼顾系统性能、价格比和缩短其开发周期。

AT89C51 Based Design of Traffic Lights at the Crossroads

The system of brainpower controller of traffic light is designed, whose primary parts are Atmel 51 series SCM 89C51.. This system has two pairs of LED display and ＂urgency＂, ＂relieve＂ buttons. It can show residual time at the manner of count down on the corresponding two bit-LED display. The ＂urgency＂ button can be pressed when the urgent vehicle comes, then all red lights in the two directions illume for forbidding other vehicle to go. The ＂relieve＂ button can be Dressed when the urgent vehicle passes, then it continues previous state.