在Linux系统中，编写一个简单的字符型设备驱动程序模块，设备具有独占特性，可执行读和写操作，相关系统调用为open,close,read,write.open和close分别相当与请求和解释设备，read和write将内容保存在设备模块内缓冲区中。设备模块可动态注册和卸载，并建立与之对应的特殊文件/dev/mydev。-In the Linux system, write a simple character device driver modules, the device has exclusive features, perform read and write operations, the relevant system calls to open, close, read, write.open and were very close with the request and explain the equipment , read and write the content stored in the device module buffer. Equipment modules can be dynamically up and unload, and the establishment of corresponding special file/dev/mydev.