Study On The Embedded Equipment Monitoring Platform Based On μC/OS-Ⅱ And LwIP

Production equipment is the most important physical resources in the productionprocess, and its working status directly affect the operation efficiency of overall system.Therefore, in order to guarantee the stability and reliability of manufacturing system, itputs forward higher request to the equipment monitoring technology. The paper in viewof the traditional remote monitoring system of network’s complexity, high maintenancecosts, limited communication distance, mainly studies on the monitoring terminal.Through combining wired and wireless communications transmission equipmentmonitoring data, and using low cost, flexible structure, easy to expand, easy applicationof embedded technology to establish a complete remote equipment monitoring network.The paper emphasizes on three key technologies of embedded μC/OS-II operatingsystem, device drivers and file system, and the embedded network protocol stack LwIPduring the process of building a device monitor terminal.Firstly, in consideration of system functional requirements, real-time requirementsand subsequent scalability, the paper designed and developmented the embeddedhardware platform based on STM32F207. On the basis of analyzing the workingprinciple of the μC/OS-II operating system, the research includes task management,communication mode, the clock interrupt, etc, and implements the transplantation ofμC/OS-II system on the hardware platform.Secondly, according to functional requirements of the equipment monitoring, itrealized the input/output device drivers, RS485bus drivers and watch dog drives,etc.In order to provide unified data access interface, and to support the quick start, itdesigned the FAT file system for the μC/OS-II.Finally, on the basis of understanding of LwIP embedded network protocol stack,through the analysis of LwIP framework model, process model, the main function ofmemory management mechanismand and so on, it designed a using method of LwIP inthe specific application environment. In order to achieve the network state of theequipment, it puts forward a ICMP module extension in the LwIP by optimizing theICMP protocol code, satisfying the requirements of equipment state monitoring withinthe local area network (LAN), so it expands the application fields of LwIP.On the basis of the realization of μC/OS-II transplantation on STM32F207,designs of the device driver and file system, transplantation and optimization of LwIP protocol stack, this paper completed the integration of embedded equipment monitoringplatform. At last, every compoment and the whole software platform is separately tested byip_sinffer.