Papers by Keyword: USB

Abstract: The project is innovative to convert vibration energy of low grade to high grade of electricity, achieved the purpose of saving energy and battery recycling. The built-in permanent magnet generator inside the battery can recharging the battery and external power supply when vibrating both took advantage of the vibration energy and ensure the reliable energy source of the battery. So it has great market prospect.

Abstract: The design introduced in the ARM9 Linux embedded system using USB camera for remote video surveillance. Using TCP / IP protocol as a transport medium and routers connected via video stream ordinary unshielded twisted pair, combined with peanut shell DDNS (Dynamic Domain Name System) using remote video surveillance, improve usability and adaptability of the system.

Abstract: In the interaction of the operating system, drivers and peripheral equipment, for the user of the system at a low level, understand the importance of the system architecture of data communication, hardware programming. In this paper, we through the research and development ofa USB device driver for the underlying data communication and resource management. The method of reverse engineering in this study, we focus on exploring the use of Linux operating system USB protocol and the development of device driver. We must from the evaluation of differentdevice drivers for a variety of experiments and the test results are verygood. We believe, can offer the theoretical basis for the user a clearunderstanding of the actual data communication from the hardware to the user space application and any unsupported peripheral hardware device for the reproduction of the work.

Abstract: Universal serial bus is put forward by seven corporations which are led by the Intel. It cost lowly, fast and easily expandable. USB is widely used in serial communication interface, widely used in computer peripherals and digital products. The USB protocol layer is the core unit of the USB device, which handles most of the contents of the USB protocol provides. This paper studies USB protocol layer design and implementation. Then USB protocol layer is completed based on FPGA.

Abstract: The paper completed the software and hardware design of GNSS intermediate frequency signal acquisition system under Linux operating system, realized the GNSS software receiver under Linux. Basing on QT C++ graphical user interface application development framework and Qwt plug-in, the software and data graphical display interface was also accomplished. By caching the data of RF module and controlling read and write signals of CY7C68013A through FPGA, the high-speed data transmission function was completed. The test results show that the data transmission rate of this data acquisition system can reach more than 200 Mbps, software receiver satisfies the requirement of positioning accuracy, has good flexibility and higher adaptability, and the algorithm of which was easy to be expanded and upgraded.

Abstract: — This paper will describe the interfacing of multiple wireless cameras to a computer for the purpose to provide monocular vision for robot soccer. The paper describes two methods, PostMux and PreMux which uses two types of wireless camera receiver. The pro and con of these methods are tabulated and compared. Important criteria such as power and bandwidth consumption of the USB port when connected to the computer are listed. Final selection for the application of monocular vision in robot soccer is concluded.

Abstract: S3C4510B is a cost-effective 16/32 bit RISC microcontroller based on Ethernet application system, and ISP1161 is a chip which is designed to implement USB protocol in an embedded system. Here, we design and implement embedded systems USB with ISP1161 chip based on ARM microprocessor S3C4510B. This paper describes the basic working principle of ISP1161 chip and hardware design of the system, and presents the software implementation process of USB in embedded systems.

Abstract: A power quality on-line monitoring device based on two CPUS is designed and implemented in this paper, which separated the data analysis from the peripheral control completely, used CPLD (Complex Programmable Logic Device) to generate control timing of peripheral devices, made full use of the DSP, so as to meet the requirements of power quality: monitoring precision and real time. The paper firstly introduces the monitor's sampling circuit, communication module circuit, storage module circuit and the flow chart of software. Then, the functions, features and designations of each module are described in detail.

Abstract: This paper designed an image transmission based on FPGA and USB platform, it can complete the verification function of the image acquisition. The image data was stored in the external SDRAM of the FPGA, using Nios II to control each module, it was sent to PC through the UAB bus used CY7C68013A chip and displayed on LabVIEW. In the process of data transmission, the DMA technology accelerated the speed of transmission and reduced the rate of CPU utilization. After experiments, this platform accomplished the functions of image acquisition, image processing and binocular positioning; it has a simple, intuitive display and good compatibility characteristics.

Abstract: The virtual instrument is the computer-based instrument. The close integration between computer and instrument is one important instrument development direction. The virtual digital storage oscilloscope introduced in the paper has some additional functions except the common oscilloscope functions, its additional functions are spectral analysis, parameter automatic measurement, complex conditions trigger and data storage. The virtual digital storage oscilloscope communicates with the PC software through USB port. The paper discusses the overall design ideas of virtual digital storage oscilloscope, and the composition and functions of the circuits.