Development Of Signal Acquisition/processing PCI Card Based On TI-C54X

The task of the design is to develop a computer extended circuit board, which is applied to the acquisition and processing of beat-signal in Linear FM-CW Radar(LFMCW).In the wholly developing procedure, author persists the idea of ensuring circuit performance, cutting down cost and realizing acquisition/processing fully. For realizing real-time processing, designer has combined DSP and PCI technology, adequately taking advantage of DSP's powerful function of signal processing and PCI local bus?capacity of rapid data transmission. TMS320VC5402 manufactured in TI has the properties of enhanced HPI interface (Host Parallel Interface), DRAM (Dualaccess RAM) of 16 Kilobyte long and CPU operating in frequencylOOM. 55920 made in AMCC is dedicated to realizing PCI interface. The circuit designed with TMS320VC5402 and S5920 is compact and run well. In hardware design, a scheme called alternately acquisition processing avoids using large amount outside memory and simplifies the system; In software design, FF1?on the plural data converted from real input and the application of sine function symmetry overcome the trouble resulted from lack of inside memory. The measures taken in software and hardware result in the faster processingfirst-hand. Testing on the card indicates it's performance is good, according with the task.