The Design And Implement Of USB Video Acquisition System

Data acquisition technology is used in lots of manufacture occasion. With the acquisition of data, accuracy and speed acquisition of increasingly high demands. Traditional acquisition style is strongly restricted the development of data acquisition devices. New generation Universal Serial Bus has the advantages of small transmission line, quick transmitting rate, sustaining hot-plug and pull. Easy extensibility and so on which solved the problems of traditional communications style well. So Universal Serial Bus technology gains wide applications in the data acquisition applications.In this paper, based on deeply analyzing of USB2.0 protocol, which built up the video system for data acquisition and transmission with FameG FS7805 control chip. And the bulk and control were carried out in this system respectively.Papers summed up the whole process of research, the results can be summarized as follows:1. In the analysis of the USB bus architecture and determined on the basis of the characteristics of the system and the overall framework of various parts of the chip choice. The whole system contains two parts that are hardware design and software design. It realizes functions of data acquisition, data transition and data display.2. In a detailed analysis of the key components of interfaces and parameters on the basis of completion of the power supply circuit, interface circuit and external auxiliary circuit hardware design. The hardware of the system realizes video data acquisition function, which sends data to the USB controller, and then USB controller sends data to PC by USB interface.3. On the basis of hardware design realized USB firmware program, device driver program and the user program. The USB firmware program realizing the initialization of USB controller and Acquisition chip. The device driver program provides the channel to the software and the hardware platform for the user program. The user program realizes the data receiving and displaying functions.Research projects in the developing FameG FS7805 chip for the applications have some role. And USB 2.0-based embedded system development similar to provide a certain amount of reference.