基于单片机的公交车汉字显示系统设计剖析

本科毕业设计

公交车汉字显示系统

摘要：随着时代的进步，公交车已经成为一般工薪族和学生族出门必须的交通工具。由于单片机技术以及电子语音技术飞速发展。目前，在公交车报站方面，也由传统的人工报站，逐渐改变为使用微电脑控制的语音文字报站系统。从以前售票员的大声报站变成现在的自动语音报站以及汉字提示等新型的报站系统，加快了现代化建设的进程。是国家自动化交通发展的标志。

本文介绍了一种新型的公交车自动报站汉字显示系统的设计原理，同时提供了一种以89C52单片机为核心，控制ISD4004语音芯片及LED点阵显示汉字的新方案。利用89C52单片机作为CPU来进行总体控制，通过语音控制电路进行各种提示语音的播放，同时使用LED点阵电路进行汉字显示，实现了公共汽车的语音自动报站以及汉字提示的功能; 本系统是以C语言为主，汇编语言为辅来进行软件设计，指令的执行速度快，节省存储空间。为了便于扩展和更改，软件的设计采用模块化结构，使程序设计的逻辑关系更加简洁明了，使硬件在软件的控制下协调运作。

该设计实现了图文、语音一体化协调工作，减轻了司售人员的劳动强度，提高了车辆的服务质量，是一种科技、时尚的新产品。同时它摆脱传统电子屏"线"的束缚，使其应用更加市场化，其“流动”显示的特点更为广告界所推崇，是一种全新的信息传播载体。

关键词：89C52单片机；LED点阵显示；语音芯片

The bus Chinese character display system Abstract:With the progress of The Times,the bus has become a general applicability and students go to the family transportation.Due to the microcontroller technology and electronic voice technology rapidly develope.At present, in the bus stops,also from the traditional artificial stops, gradually changing into using the microcomputer control system of bus stop announcement. From before the loud voice stops of the conductor to be the new characters suggest and stops system,accelerating the process of modernization.It's the national symbol of automation transportation development.

In this paper, a new type of bus stops automatically design principle of Chinese character display system, and provides a 89 c52 as the core, control the ISD4004 voice chip and LED dot matrix display Chinese characters, a new solution. Using 89 c52 as the CPU for overall control, through the voice control circuit for a variety of prompt voice broadcast, at the same time the use of LED dot matrix Chinese characters display circuit, has realized the automatic voice of the bus stops and the function of the characters suggest that implements the graphic work in coordination, voice integration, reduce the labor intensity of the company sales personnel, improve the service quality of the vehicle, is a kind of science and technology, fashionable new products. At the same time it get rid of the bondage of traditional electronic screen "line", make its application more market-oriented, the characteristics of the "flow" shows more advertising, is a kind of new media.

This system is based on the C language for software design, instruction execution speed, saving storage space. To facilitate the expansion and change, the design of software adopts modular structure, make the program design more concise and clear logical relations, make coordination of hardware in the software under the control of the operation.

Key words: 89c52SCM; LED dot matrix display; Voice chip