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计算机系统应用英文版:2011,20(11):207-209,188

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基于Linux 液晶显示触摸屏控制的新设计与实现

胡俊, 何建忠

(上海理工大学光电信息与计算机工程学院,上海 200093)

New Design and Implementation of LCD Touch Screen Controller Based on Linux

HU Jun, HE Jian-Zhong

(College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

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本文已被：浏览 1720次下载 3935次
Received:March 12, 2011 Revised:April 07, 2011

中文摘要: 在分析电阻触摸屏和ADC 的工作原理的基础上,采用微处理器LM3S4749 自带模块ADC 和GPIO 等代替触摸屏专用控制器ADS7846。设计出LM3S3749 与液晶显示触摸屏接口电路的硬件连接,并给出必要的程序流程图和函数代码。提出触摸屏触点坐标的获得方法与液晶屏显示同步的算法,以提高设计触摸屏与液晶屏的效率,满足控制精度。

中文关键词: 触摸屏微处理器LM3S3749 ADC 接口电路

Abstract:On the basis of analyzing the working principle of ADC and touch screen for resistance, using ADC and GPIO module of the microprocessor LM3S3749 instead of dedicated controller ADS7846 touch screen. The hardware connection between LM3S3749 and LCD touch screen Interface circuit was designed, and a necessary program flowchart and function code was given. The method of obtaining coordinates of touch screen and the algorithms of LCD screen display synchronization were proposed to improve the efficiency of touch screen and LCD screen, and to satisfy the control precision.

keywords: touch screen microprocessor LM3S3749 ADC interface circuit

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基金项目:

Author Name	Affiliation
HU Jun	College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
HE Jian-Zhong	College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Author Name	Affiliation
HU Jun	College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
HE Jian-Zhong	College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

引用文本：
胡俊,何建忠.基于Linux 液晶显示触摸屏控制的新设计与实现.计算机系统应用,2011,20(11):207-209,188
HU Jun,HE Jian-Zhong.New Design and Implementation of LCD Touch Screen Controller Based on Linux.COMPUTER SYSTEMS APPLICATIONS,2011,20(11):207-209,188