基于Bresenham的仪用液晶屏图形生成算法应用研究  

Graphics Generation Algorithm Application in Instrumental LCD Drawing Based on Bresenham

作　　者：李银华[1] 韩郡业[1] 

机构地区：[1]郑州轻工业学院电气信息工程学院,河南郑州450002

出　　处：《液晶与显示》2009年第4期592-596,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：河南省教育厅科技攻关项目(No.2009A510016)

摘　　要：针对ST7920液晶控制器和点阵式液晶显示模块KXM12864M(LCDModule,LCM)的特点,画出了ST7920与单片机的硬件接口电路。在Bresenham算法的基础上,采用离散的整数增量来代替斜率增量的计算方法,给出了适合MCU作图运算的优化算法推导过程,通过C语言编程实现了画线、画圆等操作。工程实际使用结果表明,该优化算法具有简单可行、移植性好的特点,为在中小型仪器仪表显示设备上绘制其它图形提供了新的途径。According to the characteristics of ST7920 LCD controller and dot-matrix LCD modules （KXM12864M）, this paper draws the hardware interface circuit between ST7920 and single-chip. On the basis of Bresenham algorithm, the article adopts the calculation method which uses discrete integer increments instead of rate increments and proposes deduction process of optimization algorithm which can apply to MCU drawing operations. And then the painting line, round and other operations can be realized through the C programming language. The actual project results show that the optimization algorithm has simple and good-transplant characteristics. And it can offer a new approach for drawing other graphics on small and medium-sized instrumentation display equipments.

关 键 词：液晶显示屏 BRESENHAM算法 差值比较 作图 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]