电阻式触摸屏的硬件接口电路与校准算法  

Hardware Interface Circuit and Calibratance Algorithm for Resistance Touch Screen

作　　者：谭翠兰[1] 何立言[1] 

机构地区：[1]江汉大学物理与信息工程学院,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2011年第2期19-21,共3页Journal of Jianghan University：Natural Science Edition

摘　　要：介绍了触摸控制芯片ADS7843的基本工作原理及其与单片机的接口电路设计,给出了触摸屏的坐标变换及校准算法,并用数据证明了此算法的可行性.采用MSP430单片机作主控芯片,液晶采用武汉中显分辨率为800×480的7寸触摸屏,验证了该校准算法在实际应用中的效果.Introduces the working principle of chip ADS7843 for touch screen′s control,gives the interface circuit of ADS7843 with MCU,presentes the coordinate transform and calibration algorithm for touch screen,and testifies the feasibility of algorithm by data.The circuit uses MSP430 series MCU to control a touch screen LCD with 800×480 pixels,which is manufactured by Wuhan Zhongxian Company,the test verifies the effect of the calibration algorithm in actual application.

关 键 词：触摸屏 坐标变换 校准 ADS7843 

分 类 号：TP334.3[自动化与计算机技术—计算机系统结构]