嵌入式系统设计实训 (论文)说明书-简易液晶菜单设计精选.doc

编号： 嵌入式系统设计 实训 (论文)说明书 题 目： 简易液晶菜单设计 院 （系）： 应用科技学院 专 业： 电子信息工程 学生姓名： 学 号： 指导教师： 2010年 1 月 10 日摘 要 随着微处理器的广泛应用，越来越多的仪器采用智能化的操作方式，微控制器已经广泛应用到各个领域中，为了使仪器的操作更简便，人机界面更友好，在现代仪器电路中经常采用液晶与按键的搭配方式作为人机接口。液晶不仅功耗低，而且提供的可视化信息丰富。所以采用液晶提供菜单与按键反馈相组合的方式为理想的人机交互方式。根据实际不同的设计，本设计主要研究在嵌入式系统中按键的软、硬件设计及菜单和程序模式之间的关系。 本系统主要介绍了基于LPC2138的简易菜单显示控制系统，该电路主要分为控制模块、键盘控制模块、显示模块三部分。显示控制模块主要是通过I/O口输出的具有时序的方波作为显示的控制信号，使之显示所需要的界面；按键主要是控制界面达到友好的人机交流。 关键词：LPC2138；LCD12864；按键控制 Abstract Along with microprocessors widespread application, more and more instruments use intellectualized the operating mode, the micro controller already widely applied in each domain, to cause instruments operation to be simpler, the man-machine contact surface is friendlier, uses the liquid crystal and pressed keys matching way frequently in the modern instrument electric circuit takes the man-machine connection. The liquid crystal power loss is not only low, moreover provides the visualization information is rich. Therefore uses the liquid crystal to provide the menu and the pressed key feedback facies group way for the ideal man-machine interaction way. According to actual different design, this design main research in embedded system pressed keys software and hardware design and menu and between program schema relations. this system mainly introduced based on the LPC2138 simple menu display control system, this electric circuit mainly divides into the control module, the keyboard control module, the display module three parts. The display control module is mainly has the succession square-wave through the I/O mouth output to take the demonstration the control signal, causes contact surface which it demonstration needs; The pressed key is mainly the control interface achieves the friendly man-machine exchange. Key words: LPC2138; LCD12864; Key Control 目 录 引言 2 1 系统介绍 2 1.1 系统方案框图 2 1.2 LPC2138介绍 2 1.2.1主要特性 2 1.3 功能描述 3