主要讲解了Linux 操作串口的架构。

添加串口硬件时，首先通过驱动程序，采集串口当中的数据，内核通过提供read、write 、select、open、close 供应用程序调用，在设计串口通信类，就是对这几个函数的运用。

-Mainly on the architecture of the Linux operating serial.

Add serial hardware driver, collecting serial data which the kernel by providing the read, write, select, the open, close supply application call, in the design of serial communication class, is the use of these several functions.