基于S3C2440定时器的电阻式触摸屏绘线算法

Algorithm for Resistive Touch Screen Drawing Based on S3C2440 Timer

文章简述了ARM9处理器S3C2440触摸屏接口及四线电阻式触摸屏的相关原理,着重讲述了采用S3C2440定时器配合触控接口进行触摸事件的中断处理和软件滤波方面的算法实现。采用该算法的触摸屏绘线效果光滑流畅,具备较强的可移植性和实用性。

This paper introduces the principium of touch screen interface of ARM9 processor S3C2440 and 4-wire resistive touch screen. It mainly describes the algorithm of interrupt service routine and software filter based on the design of S3C2440 timer. This algorithm makes the touch screen drawings smooth and fluent. It is transplantable and practical.