电阻式触摸屏的硬件接口电路与校准算法

江汉大学学报（自然科学版） ›› 2011, Vol. 39 ›› Issue (2): 19-21.

电阻式触摸屏的硬件接口电路与校准算法

谭翠兰,何立言

江汉大学物理与信息工程学院, 湖北武汉 430056

收稿日期:2011-01-16 出版日期:2011-03-20 发布日期:2013-12-30
作者简介:谭翠兰(1981—),女,湖北潜江人,实验员,硕士,主要从事单片机与嵌入式系统研究.

Hardware Interface Circuit and Calibratance Algorithm for Resistance Touch Screen

TAN Cui-lan, HE Li-yan

School of Physics and Information Engineering, Jianghan University, Wuhan 430056, Hubei, China

Received:2011-01-16 Online:2011-03-20 Published:2013-12-30

摘要/Abstract

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.

关键词: 触摸屏, 坐标变换, 校准, ADS7843

Abstract: 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.

Key words: touch screen, coordinate transform, calibration, ADS7843

中图分类号:

TP334.3

谭翠兰,何立言. 电阻式触摸屏的硬件接口电路与校准算法[J]. 江汉大学学报（自然科学版）, 2011, 39(2): 19-21.

TAN Cui-lan, HE Li-yan. Hardware Interface Circuit and Calibratance Algorithm for Resistance Touch Screen[J]. Journal of Jianghan University(Natural Science Edition), 2011, 39(2): 19-21.

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