目 录摘 要..............................................................ⅠAbstract..........................................................Ⅱ1 绪论...............................................................11.1 交通灯国内外进展现状............................................11.2 交通灯控制系统讨论意义..........................................21.3 课题的任务要求..................................................32 系统设计的总体方案.................................................42.1 系统设计目标....................................................42.2 交通道路管理方案................................................42.3 系统设计总体方案................................................43 交通灯控制系统硬件设计.............................................63.1 单片机简介......................................................63.2 系统时钟电路....................................................63.3 信号灯显示电路..................................................73.4 倒计时显示电路..................................................83.5 键盘设置电路....................................................93.6 单片机控制电路设计.............................................104 交通灯控制系统的软件设计..........................................124.1 软件设计环境简介...............................................124.1.1 Proteus 仿真软件简介......................................124.1.2 KeilC51 编译软件简介......................................124.2 交通灯系统主程序...............................................134.3 交通灯延时程序.................................................134.3.1 计数器硬件延时............................................134.3.2 软件延时..................................................144.4 交通灯显示程序.................................................154.5 按键处理程序...................................................154.5.1 设置键处理................................................164.5.2 增加键处理............................