基于S3C2410嵌入式系统的触摸屏驱动设计  

Driver Design of Touch Screen Based on S3C2410 Embedded System

作　　者：冯先成[1] 李小鹏[1] 司擎华[1] 

机构地区：[1]武汉工程大学电信学院,湖北武汉430073

出　　处：《光学与光电技术》2012年第6期72-76,共5页Optics & Optoelectronic Technology

基　　金：湖北省教育厅重点科研项目(D200915002);湖北省建设科技计划项目(200917)资助项目

摘　　要：为满足性能良好、运行稳定、精度高的触摸屏在嵌入式系统中的广泛应用,提出了一种嵌入式系统的触摸屏驱动设计,这种方案基于S3C2410微处理器与触摸屏的硬件接口在嵌入式ucos操作系统中的软件驱动实现,采用外部晶体管连接触摸屏到S3C2410的接口电路,并利用S3C2410的等待中断模式和自动X-Y坐标转换工作模式,读出与X-Y坐标有关的电压值。高效地完成了触摸状态的检测以及触摸数据的转换,其实现方法具有简便高效,易于实现等特点。In order to meet the requirements of the good performance, stable operation, high precision for touch screen in the embedded system, a kind of driver design of touch screen in embedded system is put forward. The scheme is based on the S3C2q10 microprocessor with touch screen hardware interface in embedded ucos operating system software implementation, using external transistor connected with the touch screen to the S3C2410 interface circuit. The designed driver can read out the voltage value of X-Y coordinates and control the touch-screen by using S3C2410＇s waiting interrupt mode and automatic X-Y coordinate conversion mode. The touch state detection and touch data conversion are completed efficiently. The realiza- tion method is simple and efficient, and is easily to be implemented.

关 键 词：嵌入式系统 触摸屏 ARM处理器 模 数转换器 控制寄存器 

分 类 号：TN27[电子电信—物理电子学]