modbus rtu协议 linux 平台的实现.读取相关配置文件信息.通过串口发送数据.-modbus rtu protocol linux platform. read the configuration file information. send data through serial port.

这是串口的头文件，它规定了串口的打开，关闭，设置，接收数据，发送数据-This is the first serial file, which defines the serial port of the open, turn off, set up, receive data, send data