1、 摘 要 公交车自动报站系统的硬件设计原理公交车自动报站系统的硬件设计原理 摘摘 要要 本文介绍了一种的公交车自动报站系统的硬件设计原理，提供了一种以 AT89C52 单片机为核心，控制大屏幕 LED 点阵显示的硬件设计方案。系统主 要通过 AT89C52 单片机做为系统 CPU，处理包括键盘输入和 LED 显示屏显示站 名的所有信号处理。系统扫描到有键按下，判键确定后给 CPU 一个脉冲信号， 然后 CPU 处理信号，确定所到站的站名， 再通过扫描驱动从 LED 显示屏上显示 出所到站的站名。达到半自动报站的作用。整个系统硬件设计包括键盘电路、 复位电路、显示驱动电路、显示电路、内存扩展电路
2、模块。其中显示模块是本 系统的重点。 本系统很大程度上提高公交车报站的准确性，可靠性。提高了公交系统的服 务质量。促进城市经济发展和交通变化的和谐发展。 关键词关键词 ： AT89C52 单片机； LED 点阵； AT24C64； 自动报站； ABSTRACT The Design of Automatic Bus Station-Informer This article introduces a new methde to design the bus-stop reporting system。It provides a new scheme ,which is based AT89C5
3、2 microcomputer，to control the display of the LED lattice。 The system mainly through AT89C52 as the core system, controls keyboards input and LEDs display . The entire system through manual operation after receiving the keys to a system scan button press, Key subcontractors that determined a signal
4、to the microcontroller, then the micro-processing of signals from the accrued value added to determine the reliability of station names. Driving through the scanning from the LED display by the arrival station names. Reached semi-automatic stations role. The entire system includes some modules ;for example ， the key subcontractors, the signal input microcontroller, signal processing, LED Drivers and LED display program. LED display is the focus of the system. The s
