Key Technology Of Agriculture Data Acquisition And Transmission Based On Embedded System

Precision agriculture as an integrated application of geographic information technology, computer-assisted decision-making technology, agricultural engineering technology and other modern hi-tech agricultural technology system, have become a hot area of agricultural sustainable development research, are widely used in agricultural production. In China, precision agriculture has made great achievements, but there are still many problems, especially remote acquisition and transmission of agricultural data. the agricultural data can not always be fast and efficient acquisition and transmission, thus seriously hindered the development of precision agriculture and applications. This is one of the main reasons that caused China's agricultural production at a relatively low level long-term.Therefore,analysis the problems of agriculture data acquisiton and transmission system,research and develop the system with new technologies for the development of precision agriculture is important.Embedded System is one of the most popular technologies.With the extensive application of embedded systems,Embedded technology will be applied to agricultural production to solve agricultural remote data acquisition and transmission issues,which is not only will promote the development of China precision agricultual greate,but also is the new application trend of embedded system. Based on the analysis of similar products characteristics and trend at home and abroad,and based on the combination of acutal needs of agricultural data acquisition and transmission used in precision agriculture,the paper will mainly discuss the reaserch of key technology of agriculture data acquisition and transmission based on embedded system.The paper analysed systemically correlative theories and new technologies for establishing system of embedded system ,and summarize the gereral method.the hardware platform of system had been constructed based on s3c44b0x coreboard,then expand the ethernet interface, lcd interface, uart and other common interface according to system needs. the software of the system should be developed by cross compiled,so crossing compile environment must be established first. Analysised the solutions of uClinux used in edmedded system and the major tasks when porting uClinux to hardware platform had been established in-depth.the software system had been constructed inculding porting U-Boot as system bootloader ,porting uClinux as operation system and making the root file system.so the embedded system based on ARM & uClinux constructed successfully.Disscussed the development of devices driver and application program under Linux,then developed ethernet driver,lcd driver, uart driver and application program of A/D and so on according to need. Discusse the embedded Web Server and realized the embedded system BOA server porting and configuration, and completed the test page and the CGI programs. then selected MiniGUI as the GUI software after comparing the different products for embedded Linux GUI..based on analysis of MiniGUI architecture, discussed how to porting MiniGUI and developing the MiniGUI programs .