The Design And Implementation Of Portable Sweeper Based On Embedded System

Sweep technology is developed in the 60s of the 20th century up a brand new technology, the frequency characteristics of the circuit testing, research, analysis, or to improve the performance of the circuit provides a convenient conditions. Sweep greatly simplifies the measurement operation, improve efficiency, to the measurement process fast, intuitive, accurate and convenient purpose of scientific research and teaching in the production has been widely used. In the analysis of the circuit, the sweep is indispensable instrument known input excitation signal source, application is widespread. Through sweeping technology amplifier, filters, resonators and resonant network and other electronic devices to measure the frequency characteristics analysis, measurement and analysis can make more rapid and accurate.This design is based on embedded technology of portable sweepers, whose aim is to design a small size, low power consumption, the use of flexible, low-cost portable Sweeper, and based on embedded technology to provide data storage and other functions, this subsection Scanner design also allows a separate instrument in this paragraph as the multi-waveform function generator, such as sine, square, triangle wave, it can be used alone as the oscilloscope and can be programmed by software to add or delete equipment functions the test data storage, management, operation, easy to use. Design and development of this small, simple, inexpensive,Versatile portable Sweeper is very significant.The main work of this paper include the followings:(1)For system architecture design for the current mainstream of several systems, the theoretical and practical needs as the basis of the analysis and research, the ARM + FPGA architecture. Xscale PXA270 embedded processor core, access to cyclone series FPGA, waveform module, waveform acquisition module and the on-chip peripherals to form the design of portable scanner hardware architecture.(2)Established cross-compile of embedded software development environment software platform, configured EBOOT, the embedded platform under conditions of limited hardware resources, the software needed to use PB generated a Windows CE Portable Scanner operating system kernel.(3)Provided under the Windows CE driver model, developed Scanner streaming write stream interface driver and the interface driver, and then add an external hardware streaming interface driver to solve the interactive interface to the external hardware operational problems.(4)Use VisualStudio2005 software to write the client interactive interface, through the use of a single document called the dialog box, all feature modular design, providing a call-flow driven interface functions, to operate the hardware operation, so that program can run multi-threaded high-speed improve the efficiency of CPU.(5)According to the design called for a test program for debugging and testing problems, put forward some practical solutions. The final test results basically meets the design requirements and a summary and outlook.