Research Of The Embedded IHN Node Based On LonWorks

The Field-bus technology is the focus of current control field development. With the rapid development of computer technology and communication technology, American famous network corporation Echelon brings forward the slogan:"Bring the Internet to life". With the combination of field-bus technology and network technology, Intelligent Home Network (IHN) becomes an important direction of current network development. Intelligent home network is such a kind of network that integrates information management and information control. Through internet, it enables a family to communicate with the outside world and perform many operations on home appliances and electrical appliances, such as, process control, energy-economized control, state detect, intelligent service, safety protect and so on. Because of the embedded operating systemμC/OS_Ⅱhas better real-time task scheduling and high-capacity, the issue based on the development of host-based intelligent node, applyμC/OS_Ⅱsystem and fuzzy control theory to the IHN LonWorks node, implement the host-based air-conditioning control node system. The issue preliminary descript a design of LonWorks network monitoring system.Based on the LonWorks technology, the thesis develops a MSP430 processor-based node, and expatiates the hardware connection and related communication software. Neuron Chip as a communications processor, Host processor deal with the application tasks. Communication between the two companies uses ShortStack technology which is supplied by Echelon. The thesis described the development of technology ShortStack in detail.In order to meet the real-time scheduling needs of IHN node, embeddedμC/OS_Ⅱoperating system in the main processor MSP430F149, its main mission is tasks schedule. The application process will be run as the main mission ofμC/OS_Ⅱembedded operating system. As the development examples of the IHN node, apply the IHN nodes to the air conditioning control of automation building systems, as a client home nodes of the system. Aim at the characteristics of temperature control, the thesis designs a fuzzy controller to achieve precise adjustment of temperature.Finally, the thesis preliminary design the network monitoring interface, and give the detailed software of local monitoring and Internet monitoring, and design a remote monitoring and control home page.