The Research Of Embedded Meteorological Data Acquisition System

With the rapid development of meteorology.The needs of people for information in quantity and quality changes profoundly.In order to adapt to the needs of society, the automatic meteorological observation technology of our country has been developed rapidly.But at the same time,the key technology——research of the meteorological data acquisition system,was a long lag to foreign developed countries.In view of the urgent need to develop a new generation of high-precision,highly flexible data acquisition system,based on the development ofμC/OS-Ⅱembedded operating system,this paper research and construct meteorological data acquisition system based on ARM7,provide a reference to develop meteorological data acquisition system by embedded method.In this paper,the work carried out include the following facts:1.Built the overall framework of hardware platform,completed the chip selection of the data collection part,the main control part and data interface communication part,give the program of various circuit parts connecting to the processor chip module(S3C44BOX).In the USB interface module,the design uses a USB interface with a microprocessor chip(AT43USB370) main terminal controller, the chip will be able to deal with USB host activities without the system processor intervention,which allows the consumption of system resources to minimum,greatly reduced the workload of system development.2.Analyzed the characteristics ofμC/OS-Ⅱembedded real-time operating system,and modify the source code associated with the processor to meet the ARM7 chip(S3C44BOX) configuration requirements realize the transplantingμC/OS-Ⅱto S3C44BOX.the paper defined the task priority,message queue of the system as the preparation of the system application.3.Established the overall framework of software portion,gave the programming of the data acquisition system initialization and four meteorological data acquisition, compile the driver of the USB interface function and serial port function and establish a FAT16 file system in order to achieve the storage of data.The system takes advantage high-performance,low power,low-cost advantage of ARM microprocessor(S3C44BOX) and the convenience saving resources,intelligence of USB chip(AT43USB370),based on the advantages of the portability, and low-cost development ofμC/OS-Ⅱprovides an economical and practical solution for the automatic weather station data collection.