USB接口触摸屏的驱动开发技术

介绍了开发USB接口触摸屏的一些流程及技术.并具体实现了一种基于嵌入式linux系统下USB接口触摸屏驱动的开发.该嵌入式平台基于x86结构的嵌入式工控主板,操作系统采用实时RT-linux.内核模块与用户程序的通信采用了RT-FIFO管道方式.最后给出了一种触摸屏坐标的修正方法.该触摸屏驱动是用C语言编写的,所以具有较强的移植性.在实际地应用中,该触摸屏驱动可以正常工作且具有较高的精度,提供的触摸屏坐标修正方法也能很好地解决在长时间使用后坐标出现失真的情况.

Development Technology of Touch Screen Driver of USB

This paper introduces the critical processes and technologies of developing the drive of touch-screen with USB interface,and implements a type of drive based on embedded linux OS.The system platform is based on an industrial embedded mainboard with x86 architecture,the operation system is RT-linux,and the RT-FIFO is adopted to communicate between the kernel and user's applications.At last,this paper gives the modification method of coordinate in the touch-screen.The driver is programmed with C language,so it can be transplanted to other systems easily.In actual applications,the driver can work accurately and it can modify the imprecise coordinate after long time use.