在linux下用C语言开发的小程序，实现对指定串口的打开，设置串口的通信参数（波特率设置，数据位，奇偶校验，数据流控制等），通过使用read函数和write函数实现串口的读写。-Under linux using C language in the development of small procedures, to achieve the specified serial port to open, set the serial port communication parameters (baud rate, data bits, parity, data flow control, etc.), by using the read and write functions for the function serial read and write.