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The Design and Implementation of USB Image Transmission System Base on Android

Author: LiPengFei
Tutor: LiChengJun; WangFuTang
School: Wuhan University of Technology
Course: Electronics and Communication Engineering
Keywords: Android ARM USB UVC Image Acquisition Image Transmission
CLC: TN919.8
Type: Master's thesis
Year: 2012
Downloads: 267
Quote: 0
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Abstract


In recent years, with the rapid development of the Android technology, Android operating system is used in a wide variety of mobile devices. People need more and more applications base on Android. It also makes the Android system’s functions have become more and more abundant. Today, the Android operating system has been closely related to people’s lives. Android operating system is to be used not only for smart phones, but also include PCs, Digital Cameras, and other fields. Besides, Google has already published the Android source code to support X86architecture. In the future, Android system will be used in many fields such as personal computers, medical equipment, traffic management, etc. Android system need to improve functions constantly, make sure it can adapt changing application environment.The image transmission function is one of the most important functions of the Android system. However, Android system applications are limited to smart phones and other small devices. As well as limited by hardware platform, it makes Android image transmission functions of the operating system is relatively simple, especially in USB image devices and PCs. Now, Android system still does not have a perfect image transmission scheme to achieve. So we are pressing for extension of the Android image transmission function, when the Android system faces the future different application environments and device platforms. In this paper, I adopt the most widely used USB interface to improve the Android image transmission function, because most devices support USB interface. The USB interface has transmission speed fast, and support hot swappable, etc. These characteristics are very suitable for the realization of image transmission. Meanwhile this topic analysed Android system image transmission’s principle, and combined with the Android system framework, this topic make depth analysis for the concrete realization of module function. Discuss the driven architecture and works on Android system, and analysis of image transmission system implementations base on USB. Porting the device drivers for Android platform, and complete the image transmission decency framework design. It includes two parts of the image transfer function, the USB host-side and device-side. Test and analysis the design of the image transmission system, the test results show this function is stable.This topic achieved USB Host side the USB Device side image transmission based on Android system. It supported JPEG, YUV, RGB image format, and also supported USB2.0and USB1.1interface. Through the test of USB image transmission system shows that this design program has stable image transmission function and high reliability. It completed the initial design goals.

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