Research And Application Of The Embedded Operating System For Wireless Sensor Network Node

Sensor network, which is made by the convergence of sensor, micro-electro-mechanism system and networks technologies, is a novel technology about acquiring and processing information. It has become one of the front fields to research. The capability of the hardware is so limited that the embedded operating system has to realize efficient management of the hardware in a limited space. As a result, choosing appropriate operating system for the nodes of wireless sensor networks become very important.Networked sensor devices will tend to be application specific, rather than general purpose, and carry only the available hardware support actually needed for the application. As there is a wide range of potential applications, the variation in physical devices is likely to be large. Good porting is a key element for the operating system of the nodes of wireless sensor networks.So WSNOS porting become very important in our study.According to the design requirement of wireless sensor networks, this paper has adeep research in the area of the software design. Summarizing the existing embedded operating systems by classification, tracking the progress at domestic and foreign, concentrating at the typical embedded operating system TinyOS, including the models of component and communication, the mechanics of power management, event driven mechanics, schedule strategy. At the same time, the programming language nesC of TinyOS and its compilation pross are studied particularly.And the porting of ncc from TinyOS to 80C51 family microprocessors chip is carried out.Based on the profound research of TinyOS, the porting schema and the design principle of the layer of hardware description are put forward. The porting from TinyOS to 80C51 family microprocessors chip is carried out.In order to improve the availability of TinyOS, the improvement direction of the dispatch strategy of TinyOS are pointed out. One strategy is tested and verified.