Research And Design Of Seamless Docking Technology Between Android And Terminals

With extraordinary pervasive ability, Android gives a powerful software support in the field of smart phones, tablet computers, smart TVs, e-book reader etc. Android, integral software stack, provides enterprises with possibilities for business areas extension, as well as the new field of mobile internet business with a powerful weapon for market development. Android application layer software R&D swept all over the world, but research of support mechanisms for pervasive applications is seldom which means an urgent need for taking an in-depth research of seamless docking work, such as software stack infrastructure design theory, software stack docking and deep customization for terminals.This thesis around the seamless integration between Android software stack and terminals covers as many hardware as possible:Firstly parses the Android system software stack model, file structure, compiler mechanism and system startup as architectural foundation; Secondly extending laterally,carry out thorough research and design of Android software stack docking-tech based on Android smartphone sensors, touch screens, displays and other equipment; Finally vertical depth, carry out an in-depth research and design of seamless docking-tech base on camera subsystem, design, implementation and optimization of main modules are described detaily with application backgrounds, support theory, design goals, implementation and testing program, main work are as follows:(1) Research and Design of seamless docking-tech between user space and kernel space.Firstly taking display control, Lite-On Tech proximity&light sensor ltr502and Focal-Tech touch panel as carriers, complete design of seamless docking-tech between user-space access and system-call interface,as well as sysfs interface and procfs interface based on software stack infrastructure. Then complete design of seamless docking-tech between user-space tools and kernel-space "bus-device-driver" model based on I2C protocol.(2) Research and Design of seamless docking-tech base on driver layer support mechanism.Firstly complete design and implementation of Android system power control and the load leakage detection; as well as analysis and design of data consistency for SMP parallel processing, interrupt handling and kernel preemption based on software stack infrastructure. Secondly complete design of seamless docking-tech between reset-timing and CPU load self-adaptive control based on diversification of hardware devices and soft real-time systems. Finaly complete design of seamless docking-tech between input subsystem and diverse input devices based on sensors and touch panel.(3) Research and Design of seamless docking-tech based on camera subsystem.Firstly complete information interaction model resolution for OV5640camera subsystem software stack, research and design of seamless docking-tech between Java framework layer and native framework layer components based on JNI, as well as Binder IPC C/S mode for multi-service integration. Secondly complete research and design of seamless docking-tech between camera subsystem software and hardware, also take an in-depth work for equipment working principle and driver layer support mechanism. Finally complete hardware level and system level optimization based on product depth customization:main work of driver layer device performance optimization are strobe inhibit optimization, lens shading correction, color correction, white balance optimization, exposure and noise reduction, gamma correction and contrast optimization; main work of system level optimization is data format conversion algorithm optimization for video recording, as well as design and implementation of automated scripts for pressure test.