Pmc (pci Back Of Card) Interface-based Real-time Data Acquisition Card

Data acquisition system is an important part in digital signal processing system. Depending on its powerful function of calculation,data saving and processing,graph display,logic decision,automatic operation ,data acquisiton system,which is characteristic of friendly panel,flexible function and easy transplant,can convert analog signal into digital signal,analysis and process the data promptly. By the fast development of DSP technology ,Digital Signal Processing is turning to real-time processing.Based on the computer bus extending technology ,it is possible to realize data acquisition technology depending on computer , which is one of the most widely used data acquisition technology .As the increasing requirement of data transform,PCI BUS is being paid more attention.This paper focus on data acquisition system ,it is the pre-processing part of the frequency-domain digital pulse compression processing system ,including the designation and realization of a real-time data transfer interconnect circuit based on PCI9656 and Hammerhead PMC+ motherboard. Based on PCI9656 interconnect chip ,design and realize a real-time high resolution(12 bits) double A/D sampling and transforming system ,which can transfer data at 32bit/66MHz on local bus and at 64bit/66MHz on PCI bus. In Order to adapt to real-time processing ,the system can sample data of any length based on working at Ping-pong mode. The test results shows that it's transfer velocity between ADSP-21160 and A/D card can reach about 200Mbytes/second,plus the storing data processing ability of 4 ADSP-21160,it completely fit on real-time processing.The main task of this paper is:Design and realize a two-channel high density A/D sample circuit cell.Design and realize a PMC card and the following processing circuit.Design the driver program of data acquisition card based on ADSP-21160.