In this system , it is master - slave structure between pc and dsp . dsp transfers data to pc by adopting the dmac ( direct memory access controller ) in pc . the thesis dwells on every part of hardware circuit and main technology such as dsp , the transferring mode of dma ( direct memory access ) , etc subsequently , it introduces the software design of the sampling system and user interface 該最小系統(tǒng)制作成高速數(shù)據(jù)采集卡,插入pc機(jī)的isa總線插槽中, pc機(jī)與dsp構(gòu)成主從結(jié)構(gòu),系統(tǒng)中tms320f240dsp作為pc機(jī)的下位機(jī),采用pc機(jī)內(nèi)的dmac ( dma控制器)通過dma (直接存儲器存取)方式把采集的數(shù)據(jù)傳送到pc機(jī)進(jìn)行處理。