II
目录
摘要....................................................................................................................................................................... I Abstract ................................................................................................................................................................ II 一、设计题目...................................................................................................................................................... 1 二、设计要求...................................................................................................................................................... 1 三、公交车汉字显示系统设计作用与目的 ...................................................................................................... 1 四、所用设备及软件 .......................................................................................................................................... 2
I
Abstract
This design mainly solve how to conveniently and accurately indicates the problem of passenger station, station have analog voice stops and prediction, text display of station stops by number and name and the name of the voice information recording and the name of choice, control, and other functions. System includes a microcontroller module, voice recording circuit, station number, name of display module, keyboard interface circuit, reset circuit and power supply, etc. System USES 51 single chip microcomputer to control the speech synthesis chip and LCD display module. Speech synthesis chip ISD4004, patented technology of semiconductor memory storage directly using data simulation, the simulation of voice and data directly into A single storage unit, do not need through A/D, D/A conversion, thus can reproduce the voice better real natural effect, avoids the general solid voice circuit for quantitative and quantitative noise and distortion caused by compression. Cooperate with the LED dot matrix display, makes the paper station system more practical. Keywords:51 MCU, LED dot matrix display, pronunciation chip
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摘要
本设计主要解决如何方便、准确地指示乘客到站的问题，具有模拟人声进行报站和预 报站，对所报站数和站名进行文字显示和站名语音信息录放及站名选择控制等功能。系统 包括微控制器模块，语音录放电路，站数、站名显示模组，键盘接口电路，复位电路及电 源等。系统使用 51 单片机来控制语音合成芯片和液晶显示模组。语音合成芯片 ISD4004, 采用模拟数据半导体存储器直接存储的专利技术，即将模拟语音数据直接写入单个存储单 元，不需经过 A/D、D/A 转换，因此能够较好地真实再现语音的自然效果，避免了一般固 体语音电路因为量化和压缩造成的量化噪声和失真现象。配合 LED 点阵显示，就使得该报 站系统更加实用。 关键词：51 单片机，LED 点阵显示，语音芯片
6.2.1 电源电路..................................................................................................................................... 4 6.2.2 LED 点阵显示电路 .................................................................................................................... 5 6.2.3 ISD4004 语音录放音电路.......................................................................................................... 6 6.2.4 按键控制电路 ............................................................................................................................. 7 6.3 系统硬件设计小结 ................................................................................................................................ 8 七、公交车汉字显示系统软件设计 .................................................................................................................. 8 7.1 主程序流程设计................................................................................................................................... 9 7.2 各子程序设计......................................................................................................................................11 7.2.1 延时子程序 ..............................................................................................................................11 7.2.2 ISD4004 语音录放程序 ..........................................................................................................11 7.2.3 中断控制程序 ......................................................................................................................... 13 7.2.4 LED 点阵汉字显示程序 ......................................................................................................... 14 7.3 软件设计小结..................................................................................................................................... 15 八、实验调试结果 ............................................................................................................................................ 15 8.1 调试工具简介..................................................................................................................................... 15 8.2 调试方案及仿真结果 ......................................................................................................................... 15 8.2.1 程序调试................................................................................................................................. 15 8.2.2 硬件仿真................................................................................................................................. 16 8.2.3 Proteus 与 Keil 连调 ........................................................................................................... 17 8.3 结论..................................................................................................................................................... 18 九、设计中的问题及解决方法 ........................................................................................................................ 19 十、设计心得.................................................................................................................................................... 19 十一、参考文献 ......................................................................................................... 19 十二、附录 1：公交车汉字显示系统总体结构电路原理图 ......................................................................... 20 附录 2：程序清单............................................................................................................................................. 21