公交车汉字显示系统

公交车汉字显示系统

文档编号:JD688 包括大图,文档字数:15532,页数:45

[摘要] 近年来随着计算机在社会领域的渗透和大规模集成电路的发展，单片机的应用正在不断的走向深入。由于它具有功能强，体积小，耗能低，价格低廉，工作可靠，使用方便等特点。因此，特别适用于与控制有关的系统，越来越广泛应用于自动控制与智能化方面。
本文介绍了一种新型的公交车自动报站系统的设计原理，同时提供了一种以89C51单片机为核心，控制ISD4004语音芯片及OCM4X8C液晶显示模块做屏幕的新方案。利用89C51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LCD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，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，是一种科技与时尚结合的新产品。
本系统是以单片机的基本语言汇编语言来进行软件设计，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。

关键词：89C51单片机，LCD点阵显示，语音芯片

[abstract] in recent years along with the computer in the social domain's seepage and large scale integrated circuit's development, monolithic integrated circuit's application unceasing trend was being thorough. Because it has function, the volume is small, consumes energy lowly, low in price, operation reliable, characteristics and so on easy to operate. Therefore, is suitable specially for with the control related system, more and more widely applies in the automatic control and the intellectualized aspect. this article introduced one kind of new public transportation automatic newspaper station system's principle of design, simultaneously has provided one kind take the 89C51 monolithic integrated circuit as a core, controls the ISD4004 speech chip and the OCM4X8C liquid crystal display module makes screen's new plan. Carries on the overall control using the 89C51 monolithic integrated circuit as CPU, carries on each kind of prompt pronunciation through the voice control electric circuit the broadcast, simultaneously uses the LCD lattice electric circuit to carry on the Chinese character to demonstrate, realized bus's pronunciation automatic newspaper to stand as well as the Chinese character prompt function, has realized the chart article, the pronunciation integration coordinated work, reduced salesman's labor intensity, improved vehicles' grade of service, was one kind of technical and the fashion union new product.
This system is carries on the software design by monolithic integrated circuit's elementary language assembly language, the instruction carries out the speed to be quick, saves the storage space. For ease of the expansion and the change, software's design uses the modular structure, causes the programming the logical relation even more simple and brief, causes the hardware to be coordinated the operation under software's control.
key word: the 89C51 monolithic integrated circuit, the LCD lattice demonstrated that speech chip

前言 3
第1章系统硬件设计 5
1.1系统的总体结构 5
1.2 LCD点阵显示电路设计 5
1.3 语音控制电路的设计[2] 6
1.4 人机接口（键盘）电路设计 7
第2章单片机及其外围电路的设计 9
2.1 单片机的结构 9
2.2 单片机的时钟电路与时序 10
2.2.1时钟电路 11
2.2.2时序 11
2.3复位和复位电路[7] 12
2.4 单片机的低功耗方式 13
2.5系统的抗干扰设计 14
2.6系统电源 15
2.7 单片机的系统扩展 16
第3章人机接口技术 18
3.1 键盘接口 18
3.1.1 键盘工作原理 18
3.1.2 独立式按键 20
3.2 液晶显示器接口 22
3.2.1 LCD的应用技术 22
3.2.2 点阵字符型LCD模块 23
第4章 OCM4X8C液晶显示模块 26
4.1 OCM4X8C的特性 26
4.2 硬件接口 27
第5章系统软件设计 30
5.1 软件设计思想 30
5.2系统程序流程图 31
结束语 33
致谢 35
参考文献 36
附录1 各功能模块软件程序 37
附录2 系统硬件原路图 44

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