java界面运行在pc上，write.c载到linux系统的节点上，两者通过串口进行通信。然后在pc上运行test，在界面中输入ttyUSB0,点open按钮，然后点read按钮。接着在节点上./write运行write就能在界面上显示接收到信息。-java interface running on the pc , write.c set to the linux system nodes, which communicate through the serial port with pc. Then run test on pc, enter the interface ttyUSB0, point open button, then read button. Then use ./Write operation on the nodes can write to the serial and you can receive information on the interface　.