基于89C52的液晶计算器.doc

武汉工程大学 《MCS-51单片机原理及应用》 课程设计实验报告 题 目 ：基于89C52的液晶计算器 学 校 ： 学 院 ： 专业班级 ： 学 号 ： 学生姓名 ： 指导老师 ： 2011年12月28日 目录 目录·····················································2 摘要·····················································3 Abstract·················································4 一、设计任务·············································4 二、正文·················································4 第1节、1602液晶与矩阵键盘概述··························4 1.1、 1602液晶的介绍以及使用方法·················4 1.2、 矩阵键盘的工作原理··························6 第2节、设计方案辨析·····································8 第3节、硬件电路的设计···································8 3.1 矩阵键盘电路·································8 3.2 1602液晶显示电路····························10 第4节、设计心得·········································11 三、参考文献·············································11 四、程序清单·············································12 摘要 本次课程设计基于89C52单片机，用一个1602与矩阵键盘来制作成一个液晶计算器。可以完成计算器的键盘输入，进行加、减、乘六位数范围内的基本运算。，并在LCD上显示相应的结果。设计电路采用AT89C51单片机为主要控制电路，利用MM74C922作为计算器3*4键盘的扫描IC读取键盘上的输入。显示采用字符LCD静态显示。软件方面使用C语言编程，并用PROTUES仿真。 关键词：计算器；单片机；LCD Abstract This course design based on the 89 C52 single chip, with a 1602 and matrix keyboard to make into a liquid crystal calculator. Can complete calculator keyboard input, add, subtract, multiply six figures within the scope of the basic operations. , and is displayed on LCD and the corresponding results. Circuit design AT89C51 microcontroller as the main control circuit, use as a calculator MM74C922 3 * 4 keyboard scan read keyboard input of the IC. The LCD display characters static display. The software used in the C programming language, and PROTUES simulation. Keyords: Calculator; Single chip microcomputer; LCD 一、设计任务 1、由于设计的是简单的计算器，可以进行四则运算，为了较好的显示效果，采用LCD显示数据和结果。 2、另外键盘包括数字键、符号键、等号键，故只需12个键即可，设计中采用集成的计算键盘。 3、执行过程：开机显示零，等待键入数值，当键入数字，通过LCD显示出来，当键入+、－、×运算符，计算机在内部执行数值转换盒存储，并等待再次键入数值，当再键入数值后将显示键入的数值，按等号