Development And Application Of Light Adjust Touch Screen Based On The Neuron Chip

The fieldbus technology is one of the focuses of development of current controlled field, local operation network LonWorks that was developed by American Echelon Company, because of its outstanding opening, interoperability, has gradually become one of the most competitive field buses at present,and has been applied in many fields. After research and analysis on LonWorks technology which is based on Neuron chips and the LonTalk protocol, this thesis introduces the light adjust touch screen technique briefly, and puts forward a project to construct a light adjust system which is based on the light adjust touch screen node.In the hardware design of light adjust system, firstly, the thesis presents the working principle, pin function, configuration inside and voltage mode of ADS7843, and introduces its time sequence, including 24 clock, 16 and 15. Secondly, the design of Neuron chip node is particularly introduced, that is the kernel module hardware design and VCN_IO motherboard and extends module design. At last, the thesis presents the circuit connection chart between the touch screen and Neuron chip, and makes the node diagnose and anti-jamming analyse.About the software of the adjusting light touch Screen based on neuron C chip, this thesis firstly introduces the structures and their functions;Then analysises the duplexing serial I/O object.The network variables of pins are defined, the functional pins and attributes of configuration are described; Finally,the flow charts of the developing program based on nodes is also described, including the flow chart of the data processing of 2051 and the flow chart of communication processing of 3150.The process of communication programs and programming implementation is given following the standard of LonMark and Neuron C.At last, the thesis gives an example for light adjust control system. Then, the light adjust node is used in one wireless light adjust system cooperate with two keypad nodes and an i.Lon100 server. Some intelligent terminals such as PDA, mobile phone can adjust the lights wirelessly through accessing the WEB HMI that is made in the upper-computer; also, the system can be accessed remotely through PCs. This is a whole network control solution.