Research And Development Of Main Control Unit Of The Meteorological Data Collector

With the fast development of the meteorological cause, the deep change is taking place no matter from quantity or the quality in the demands for information of people. Already existing meteorological observation way to rely on artificial operating and reading mainly, not only efficiency is low, but also every parameter needs artificial record and gather, the work load is huge, apt to make mistakes, can't already meet the existing meteorological observation request. Meanwhile, development and application of information technology, electronic technology and computer technology, offer strong technical support for automatic meteorological observation. Under this kind of environment, the automatic meteorological observation technology of our country has got the fast development. Through the research work for many years, it is already ripe basically to observe technology. But in the research of its key equipment——the meteorological data collector, research work far lags behind the foreign developed country. The meteorological data collector is one of the main technological difficult problems of the meteorological instrument trade of our country. There are no ripe products yet at home. The supply and demand depends on the foreign import products mainly.In the face of the current situation of developing new generation data collector with high accuracy and high flexibility for our country, this thesis carries on research and structures to the main control unit of the meteorological data collector. It offers the platform for the designs of other parts of data collector. The main control unit like the microcomputer embedded in the automatic meteorological observation system, is the control and operation core of the whole gather system. The quality of its performance determines directly the kinds of the collector function and excellence of performance.Arrival of PC era, the embedded system has already widely permeated through masses' life, is another new technological developing direction following IT network technology. The embedded system regards as a kind of special computer system, which is around the application and based on technology of the computer. Its software and hardware can be cut out. It meets requisition for function, dependability, cost, volume and consumption of the application system. Generally speaking, the framework of the embedded system divides into four parts: CPU, memory, I/O and software (operating system and application software). Development of the embedded system usually adopts three kinds of following procedure: procedure developed in waterfall mode, procedure developed in Model V mode and procedure developed on the basis of HAL. The demand of IT technology makes design method of the embedded system evolve constantly, the design methods of three kinds of different levels have appeared: ①design method taking PCB CAD software and ICE as main tool;②design method taking EDA tool software and EOS as developing platform;③design method using the hardware/software codesign based on IP kernel.The hardware platform is a foundation of the embedded system. Through an analysis of hardware composition of embedded system, combining with the present situation of embedded microprocessor, this thesis researches and designs the hardware of the main control unit of the meteorological data collector. And it carries on the introduction to the overview of 32-bit ARM microprocessor, researches its system structure and programming model.The systems software is a bridge between embedded system hardware and user's application software. As the range of application of the embedded system increases constantly, embedded system programming becomes more and more complicated. This thesis discusses the design of the embedded system firmware, introduces the design method of startup sequence and device driver of the embedded system, carries on the brief introduction and principle analysis to μC/OS-II embedded real-time operating system. According to the actual demand, it achieves startup sequence of ARM microproce...