Research And Implement On Mobile Geography Information Terminal Base On 3S

In the process of agricultural information and digitized construction, it becomes an inevitable tendency to apply the technologies synthetically, such as the computer technology,the mobile communication technology,the network technology,the databas e technology,the 3S technology and the embed system technology.This article has de s-igned a mobile geographic information terminal base on 3S.The mobile geographic information terminal hardware platform researched in this article has based on the 32 bit embed microprocessor (S3C2410) provided by Sam s-ung Co.The kernel of S3C2410 has grounded on ARM920T and it offers plenty o f periphery joints.This article makes the best of abundant resources supplied by S3C -2410 in design.In the terminal,it uses HY57V561620CT of the CMOS chip SDRA-M offered by Hyundai Corporation to form the 32 bit main memorizer and the ove rall capacitance is 64M.The data storage of the operating system, the startup parame t-er and the geographic information etc opt for Flash CMOS chip offered by Intel. The termination connects the GPS module to the GPRS module by the standard RS -232 gap .so it can get the localization data and commute information with the Ion g distance service. The LCD joint and the touch screen joint can link the TFT LC D screen to the touch screen,which are the primary mutual joints of people and co mp-uter in terminal. The Ethernet network joint and the JTAG joint are the importa nce debugging joints in terminal, which are used in exploitation and debugging phas es and in the upgrade of system phases. The power supply in terminal is supplied by the lithium batteries and the scheme of managing power supply is based on the des-ign of TPS65010 provided by TI co.This article has designed the software system of the mobile geographic information terminal .and it contains the system software design and the application software design.In the system software design process,it has customized Windows CE.NETof the embed operating system, which is adapt to the environment of the mobile t...