字符设备 Character Device ; char device ; cdev
字符设备文件 character device ; Character special file
块或字符设备 Block and Character Devices
字符交换设备 [计] character switching equipment
字符显示设备 character display equipment ; [计] character display device
字符识别设备 character recognition device
定义一个字符设备对象 static struct cdev chr_dev
面向字符的设备文件 character-oriented device file
配置字符型设备 Character Devices
面向字符的设备 Character-oriented device
描述符可以表示到设备、管道或套接字的连接，这些连接用于与另一个进程或普通文件进行通信。
Descriptors might represent a connection to a device, pipe, or a socket for communicating with another process or to a normal file.
设备名称是配置在设备上的标识符。
并且一台usb设备可能还有字符串描述符以提供像厂商名、设备名或者序列号这样的附加信息。
Furthermore, a USB device might also have string descriptors to provide additional information such as vendor name, device name, or serial Numbers.
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