基于单片机的plc中文输入系统设计_毕业设计论文.doc

毕业设计(论文)说明书 题 目： 基于单片机的LCD中文 输入系统设计 院 （系）： 电子工程学院 题目类型： 理论研究 实验研究 工程设计 √工程技术研究 软件开发 摘 要 随着我国嵌入式技术的迅猛发展，中文汉字的输入与显示在高端电子产品以及智能终端中的应用越来越广泛。目前广泛应用于数字终端的中文输入法是Nokia的T9输入法、Motorola的iTAP输入法和Erics-son的字能输入法。目前，以LCD和数字键盘实现的人机交互式界面在智能终端中广泛采用，在不同的应用场合，对人机界面的要求也不同，一些情况下只要求简单参数的显示和选择，而在一些信息终端中，还要求文字的输入。 本设计方案在AT89C55WD单片机平台上构造简易的拼音输入法，输入形式是用户通过数字键盘输入一个数字串，LCD显示出该数字串对应的各种拼音让用户进行选择， 拼音数组中的每一个元素都指向一个同音汉字串。用户在同音汉字串中选择一个汉字就可以得到该汉字的GB2312编码。通过这个GB2312码可以在汉字点阵字模库中检索到该汉字字模的起始位置，最后用带字库的128×64点阵式LCD模块为输出显示设备， 　 关键字：AT89C55WD；拼音输入法；TS12864A-3液晶；中文字库原理 Abstract With the rapid development of embedding technology, the inputting and displaying of the Chinese character in high-end electronic products, as well as the application of intelligent terminals are widely used more and more. At present, the number of terminals are widely used in the inputting method of Chinese character which are Nokias T9 inputting method, Motorolas iTAP inputting method and Erics-sons words inputting method. At present, LCD and digital keyboard to achieving the man-machine interactive interface are widely used in intelligent terminals. In different applications, the requirements of human-computer interface is different, some cases require only some simple showing and choosing of parameters, and some information terminals, as well as require the inputting about text. The design in AT89C55WD single-chip platform makes up simple phonetic inputting method, the inputting form is to enter a number string through the numeric keypad by users, the system shows the number of strings which corresponds to the alphabet ,choosing by users, the array of a homonym elements point to a string of Chinese characters. when users choose r a Chinese character can be encoded in the GB2312 Chinese characters. It can retrieve the starting position of the character matrix through the GB2312 Chinese character dot-matrix code matrix in the database . Finaly the 128 × 64 dot matrix LCD mod