基于STC89C52单片机的公交车站名显示与语音提示系统的设计（已处理）.doc

基于STC89C52单片机的公交车站名显示与语音提示系统的设计 关键字:单片机,LED点阵显示,语音芯片 THE DESIGN OF DISPLAY AND VOICE PROMPT SYSTEM FOR THE NAME OF BUS STATION Abstract With the development of science and technology,the microcontroll and electronic voice technology rapidly used in many areas.At present,in the bus stops,also from the traditional artificial stops,gradually changing into using the microcomputer control syetem 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 is the national symbol of automation transportation development. The paper introduces the design principle of a new kind of bus automic stops display system and provides a new plan to control ISD 4004 pronunciation chip and LED dot matrix to display Chinese characters by STC89C52 MCU.Using 89C52 as CPU to overallcontrol and through the speech control circuit to play various kind speech hint.Realizing the bus stops and characters of the voice of function,the text,voice integration are realized coordinationly too.Reduce the labor intensity of sales personnel department ,improving the quality of bus service.It is a kind of new products of technology and convenience. At the same time,the system has the feature of low system cost, simpleness of structure, and stability of working.The characteristics is praised highly by advertising.There are a majority of the application Key words: MCU, LED dot matrix display, pronunciation chip 第1章 绪论 1 1.1 课题的研究背景 1 1.2课题的目地和意义 1 第2章 整体方案设计 3 2.1 方案论证 3 2.2 语音电路方案论证 3 2.3 设计系统方案论证 4 2.4 系统原理的总体设计 4 第3章 系统硬件设计 6 3.1 STC89C52单片机 6 3.1.1 单片机结构图 6 3.1.2 STC89C52主要性能 7 3.1.3 主要引脚功能介绍 7 3.2 串行通信 8 3.2.1波特率的设计 9 3.2.2 定时器T1的设置 10 3.2.3 串行口方式1的发送和接收 10 3.3 存储器 10 3.3.1 程序存储器 11 3.3.2 内部数据存储器 11 3.3.3 AT24C04与I2C总线 11 3.4 LED点阵显示电路 12 3.4.1相关芯片介绍 13 3.4.2 行列驱动 14 3.4.3 汉字字模提取原理 15 3.4.4 LED扫描方式 16 3.4.5 LED驱动方式 17 3.5 ISD4004语音电路 18 3.5.1 ISD4004芯片 18 3.5.2 ISD4004的串行外