Research And Design Of Multi-platform Virtual Instrument Based On FPGA

Virtual Instrument is a Integrated Technical based on sensors, Signal measurement and processing, micro-computer technology. At present, most of the virtual insruments are based on PC, which use PCI bus technology to transmit data.In these system,data acquistion cards are plug inconveniencely and the portability is bad. With the development of Embedded technology, Embedded system platform has been applied to various fields, while the market on embedded virtual instrument system is still quite small, all kinds of research work has just begun. So,the development of high performance, flexible interface, functional diversification, low-cost virtual instrument devices will be imperative in our country.In this paper, according to the current virtual instrument development trends and characteristics, a high-speed virtual instrumentation system which supports multi-platform are designed and researched in the use of FPGA technology.And the paper comes up with a solution for some of the technical problems in system.Firstly,a systematic design is identified.The system uses FPGA as the core control system and selects Labview as the application development tools in PC platform.The system uses USB2.0 interface for data transmission and select the S3C2410 with the WinCE as the embedded system platform.Then the paper performs the design of specific modules. On the hardware side, the paper designed the front-end processing circuit design,ADC circuit. On the software side, the FPGA control programmes are designed. At the application programme design,labview application is designed for the implementation of the waveform display and spectrum analysis capabilities with a good man-machine interface. On embedded platform, a GPIO driver is designed. In order to solve the mismatch between high-speed ADCs and data memory chips,the paper proposes a multi-body cross-memory structure design, and designed the FPGA control programme with timing simulation.Finally, the debugging work is performanced for the system. The upper application software perfomance acquisition for input waveform.According to testing results, the system perfomances a better sampling and restore the waveform to achieve the desired effect. The paper researches and designs a multi-platform which supports for a new type of virtual instrument system with good performance.The system is flexible, cost-saving features and has high research value and practical significance.