基于ARM处理器的LCD控制及触摸屏接口设计

Design of LCD Control and Touch- screen Interface Based on ARM

对由S3C44B0X控制彩色显示屏和四线电阻式触摸屏组成的人机界面控制系统作了较为深入的分析与研究。介绍了S3C44B0X内置LCD控制器、液晶屏LM7M632和触摸屏控制器ADS7843的管脚功能和工作原理,完成了S3C44B0X与LM7M632及ADS7843的接口设计,论述了LCD和触摸屏的驱动过程,实现了彩色液晶显示及触摸屏控制功能。实验表明本系统通用性好,可应用于其它嵌入式系统中。

This paper makes a further analysis and research on the man-machine interface control system which is made up by the modules, with chip S3C44BOX controls colorful display screen and the four-wired resistanceTouch-screen. Firstly, the function and principles of a LCD controller embedded in S344BOX, Liquid Crystal Display （LM7M632） and touch-screen controller （ADS7843） were introduced in this paper. Secondly, Completed the design of interface $3C44B0 with LM7M632 and ADS7843. Thirdly, discussed the drive process of LCD and touch-screen. Lastly, realized the function of colorful LCD displaying and touch-screen controling. The experiment results indicate that the system can be universally use, and it can be well transplanted to other embedded systems.