This paper, based on the analysis of the linux kernel source code, describes the internal structure, the operating environment of the character device driver, and the operating principle of the character device driver.

• 本文通过对与字符设备驱动程序相关的内核源代码分析,从驱动程序内部结构以及驱动程序运行的内核环境两方面入手,对linux平台下的字符设备驱动程序的工作机理进行了分析和阐述。