基于ARM的触摸屏控制教案分析.doc

基于ARM的触摸屏控制 摘要：本文介绍了基于ARM的触摸屏控制的设计思路、原理和实现方法。硬件电路主要由PHILIPS公司的ARM7TDMI-S微控制器LPC2290，FM7843控制器和SID13503控制器构成。利用C语言编写驱动和用户程序，通过触摸屏的FM7843控制器将触摸信号进行A/D转换，进而利用ARM芯片和彩色液晶屏SID13503控制器，将触摸动作在液晶屏上进行显示，最终实现了触摸屏和液晶屏的控制。该设计操作直观、简单、功耗小、提高了人机交互的友好性。 关键词：触摸屏; 液晶屏; ARM The Control of Touch-screen Based on ARM Abstract: This paper introduced the designing of thought and the achievement methods of the control of ARM touch-screen based on ARM. The hardware circuit consists of ARM7TDMI-S LPC2290 controller, FM7843 controller and SID13503 controller which are all produced by PHILIPS Corporation. The researchers compose driven and user program in C language ,and utilize FM7843 controller of the touch-screen to proceed A/D converter, then use ARM chips and SID13503 controller of LCD screen to show the action of touching on the LCD screen, ultimately realize the control of touch-screen and LCD screen. This design is direct-viewing、simple、as well as costs less power and can improve the friendliness of human-computer interaction. Key word: touch-screen; LCD; ARM 目 录 摘要……………………………………………………………………………………………1 1 引言……………………………………………………………………………………2 总体设计……………………………………………………………………………………3 3 硬件设计部分……………………………………………………………………………3 3.1 彩色液晶显示器………………………………………………………………………3 3.2 彩色液晶屏驱动电路及SID13503控制器 ………………………………………………4 3.3 触摸屏原理..……………………………………………………………………………5 3.4 触摸屏驱动电路及FM7843控制器………………………………………………………5 4 软件设计部分................…………………………………………………………………6 4.1 触摸屏驱动程序设计....…………………………………………………………………6 4.2 彩色液晶屏驱动程序设计…………………………………………………………8 4.3 用户程序...………………………………………………………………………………..11 5 总结..………………………………………………………………………......13 参考文献………………………………………………………………………………14 附录一…………………………………………………………………………………………15 附录二…………………………………………………………………………………………18 附录三…………………………………………………………………………………………22 附录四…………………………………………………………………………………………26 1 引言 随着信息产业的迅猛发展，由于触摸屏操作直观、简单、功耗小、有利于提高人机交互的友好性等优点,而逐渐取代鼠标、键盘，在人机交互中成为主要输入设备[1]。因此LCD触摸屏变得也越来越普及,并成为当今的主流配置。而目前对触摸屏的研究性价比有所欠缺,人机交互的友好性体现不够,功耗较