便携式仪表显示与键盘输入设备设计.doc

题目: 便携式仪表显示与键盘输入设备设计姓名: 杜周班级学号: 0608014832 指导教师: 张保军摘要佳木斯大学教务处第页 I 摘要目前,电子领域正朝着集成化,微型化的方向飞速发展。微电子技术的快速更新和工业测量的大量需求,使便携式仪表有着很好的发展前景。便携式仪表一般具有携带方便,界面友好,操作简单,成本低,功耗低等特点,这些在其电路设计中应给予充分考虑。本文通过对便携式仪表典型硬件结构的分析,总结了各通用模块的功能和特点,对几种解决方案进行了介绍和比较。并以多功能便携式仪表为例, 进行了电路设计。系统以 AT89C5 2 为核心,用键盘和液晶模块作为输入和输出装置,用汇编语言编程使单片机实现键盘识别,功能转换和液晶显示等控制。针对电源模块单电源供电多路电压输出的特点,文中给出了常见的解决方案, 最后对系统调试的基本过程进行了较详细的介绍。关键词: 便携式仪表; 液晶显示; 键盘扫描; 接口 Abstract 佳木斯大学教务处第页 II Abstract N owdays, electronic area is fast developing to the integration and the fast update of the microelectronics technology and the large demand of the industrial measurements, Protables instruments have a very bright future. P ortable instruments have many characteristics such as convenience, friendly interface, easy control, low cost, low power waste. T hese should be considered in the design of its circuit. By analyzing the typical hardware structure of portable instrument,this text summarizes the function and characteristics of the interchangeable modules,introduces several ofa pared. On this condition,the circuit ofa multifunctional instrument given as an instance are designed .T he project is base on the AT89C5 2, and the keyboard and LCD are used as the input and output piled in Assemble Language make the SCM control keyboard scan , function swith and LCD display .In addition,on account of their special requirements of single voltage input and multi-voltage output,mon solution is given to solve such problems in the text ,at the end of which introduce the basic process of debugging in detail. Key Words : P ortable ; Instruments ; LCD Scanner ;K eyboard ; Interface 毕业论文(设计)用纸佳木斯大学教务处第 III页目录摘要........................................................................................................................................... I Abstract ...................................................................................................................................... II 第1章绪论............................