Linux系统中，设备驱动程序是操作系统内核的重要组成部分，在 与硬件设备之间建立了标准的抽象接口。通过这个接口，用户可以像处理普通文件一样，对硬件设备进行打开(open)、关闭(close)、读写(read/write)等操作。通过分析和设计设备驱动程序，可以深入理解Linux系统和进行系统开发。本文通过一个简单的例子来说明设备驱动程序的设计。

-Linux system, device drivers the operating system kernel are an important component of the hardware device with a standard set up between the abstract interface. Through this interface, users can deal with, like ordinary paper, the hardware device to open (open), turn off (close), to read and write (read/write) operation, etc.. Through the analysis and design of device drivers, you can-depth understanding of Linux systems and systems development. In this paper, a simple example to illustrate the design of device drivers.