基于单片机的计算器的论文.docx

目录一、系统设计31.1、功能介绍31.1.1、基本功能31.2、总体设计方案31.2.1、总体设计思路31.2.2、方案论证与比较31.2.2.5、键盘设计方案与选择5二、重要器件的知识介绍62.1、单片机的知识介绍62.1.1、单片机的主要性能72.1.2、单片机的功能特性描叙72.1.3、单片机的内部结构方框图及芯片引脚图82.1.4、单片机各引脚功能说明82.1.5、单片机时钟电路102.1.6、单片机复位电路102.1.7、单片机下载口电路11三、程序流程图123.1、程序清单14产品使用说明14设计体会16参考文献16附录1、元器件清单17附录2、系统原理图18附录3、程序清单18致谢38基于单片机的计算器电子工程专业学生勾艳玲指导教师曾实现摘要：本设计采用单片机作为控制芯片，用C语言对其进行编程实现，输入由4*4矩阵式键盘控制，输出采用人性化的SBY12864K-ZK型液晶实现。该计算器为多功能计算器，在未进行计算时，它是一个万年历时钟，并且带脑钟和星期显示，所以数据均可随时进行校准，校准数据采用的是独立式键盘，是将4*4矩阵式键盘的一根线拉低，然后读取与这根线交叉的4根线的所处状态来判断按键是否被按下，而这4个按键中只有3个按键用于万年历的校准和对脑钟的控制，另一个按键则用来切换进入计算模式。对于计算这个部分我采用的是矩阵键盘，10个数字键，一个小数点键，四个符号键，一个多功能键，通过判别该多功能键连续按的次数来决定该键此时的命令。由于C语言库函数繁多，所以我采用调用C语言库函数来解决多种运算类型，这样编程更简单，运行起来也更可靠。。关键字：单片机，点阵图形液晶，矩阵键盘，C语言库函数。Student majoring in ×××× NameTutor Name（小四Times New Romar）Abstract：The design uses a single-chip microcomputer as the control chip, using C programming language of its input from 4 * 4 matrix keyboard control, the output of the use of human SBY12864K-ZK-type liquid crystal to achieve. Multi-function calculator for the calculator, before the calculation, it is a calendar clock and bell and weeks with the brain showed that there may at any time calibration data, calibration data is used in stand-alone keyboard, is a 4 * 4 matrix keyboard down one line, and then read with the root of the cross-line 4-line state to determine which button has been pressed, which is only four keys for the three calendar button calibration and the control of the brain clock, and the other button is used to switch into the mode of calculation. For this part of the calculation I used the keyboard matrix, 10 numeric keys, a decimal point key, four symbol keys, a multi-function keys, multi-function through the identification of the row by the number of keys to determine the order of the key at this time. C language library function as a result of many, so I used to call C language library function to solve a wide range of operator types, such programming is much simpler, it is also more