Design And Research Of System Software For Smart Phone

This paper studies the smart phone system software and presents the design and realization of the smart phone system software based on embedded Linux. Smart phone is based on the hardware of Hybus's pxa272 development board and spreadtrum's SM5100B communication model. This system software is divided into four layers with the operating system as the bottom layer, which realizes the transplantation of embedded Linux. The second layer is of the system service which deals with the database service as well as all the business related with cellophanes. In the third layer, the middle layer, the embedded GUI realizes the human-computer interface and the J2ME middleware supports the download and running of java programs and games. The embedded database is used to store all kinds of information and the management system of embedded database manages all the data. The top layer is the application layer of smart phones where the basic functions and other applications of cellophanes are realized. The embedded database and the system service program is the main focus of the author's research.This smart phone operating system adopts the embedded system Linux. The Linux implantation is a complex process in which we should modify hardware and increase relevant drives according to different cellophanes hardware. Based on the Hybus pxa272, this system aims at the Linux transplantation with ARM processor. The operating system will need the support of hardware equipment BSP to be used on cellophanes. Smart phones often use the flash memory. This paper introduces several embedded file systems and the design and realization of the jffs2 file system.This paper introduces some embedded GUI under Linux such as the Qtopia PDA based on QT/E as different equipments need different GUI.With the rapid development of smart phones, there are more messages to be stored and there is a demand for embedded database to manage all the data. The embedded database is the developing trend of the mobile equipments including smart phone and also the research focus of the author. This system has designed a powerful embedded database management system for the information storage of smart phones...