Design And Implementation Of Key Software Modules In Mixed Location Terminal And ARM7 VxWorks BSP

A-GPS positioning technology is the highest precision positioning mode in mobile location services introduced by mobile operators. It combines the GPS technology and mobile communications network advantages. It has remarkable advantages such as high precision positioning, shorter time to first position and so on. A mixed location technology which combines A-GPS with Cell ID technology can consummate A-GPS technology. A-GPS technology has good prospects for development in applications of vehicle tracking, vehicle positioning, vehicle navigation and high-precision positioning services for personal consumer market.This thesis focuses on my research and development work based on A-GPS/Cell ID mixed location system. In addition, because the author's research in graduate stage also includes ARM7 44B0 VxWorks BSP transplant, the development of this part will be introduced in this thesis.According to the different content, this thesis includes two parts. The first part is about the design and implementation of key software modules in mixed location terminal, the other part is about the development of ARM7 VxWorks BSP.The contents of this thesis are provided as follows:Chapter 1 gives a brief introduction of A-GPS location technology, such as its principle, implementation modes, and application fields.Chapter 2 first describes the design of mixed location system, which can be divided into server and terminals, then illustrates the whole architecture design of terminal which can be divided into hardware design, embedded system design and application software design. Requirements and design disciplines of each part are also discussed.Chapter 3 presents the detailed description of embedded Linux operating system development on ARM9 2410, including an introduction of embedded Linux operating system as well as how to implement bootloader, ARM Linux and root file system transplant.Chapter 4 specifies the whole design and implementation of GSM module in application software, including module design scheme, implementation of key features, and processing flow in detail.Chapter 5 discusses GSM unit test.Chapter 6 specifies the concept, start-up flow, development enviroment and steps of VxWorks BSP.Chapter 7 analyzes the high-level design of base set, including networking manner, hardware platform and product functions.Chapter 8 presents the detailed description of design and implementation of VxWorks BSP on base set. It specifies the development of exception handling, serials driver, network driver, and TFFS driver.