Seamless acquisition method based on DDR2SDRAM array segmented storage

Abstract

The invention discloses a seamless acquisition method based on DDR2SDRAM array segmented storage, wherein a plurality of storage mapping monomers comprising a memory DDR2SDRAM, a three-dimensional waveform digital image processor and a three-dimensional data point lattice are adopted to alternatively carry out waveform data storage and mapping in a pipeline manner, such that acquisition of the acquisition system can not be stopped due to mapping and other operations so as to reduce a dead zone time and achieve seamless acquisition, wherein the DDR2SDRAM is divided into a plurality of storage units, and a storage depth is increased with a waveform obtained through triggering each storage unit without increase of the dead zone time. With the oscilloscope, segmented storage of the DDR2SDRAM array and alternate storage of the plurality of the DDR2SDRAM are adopted to achieve seamless acquisition at a slow speed base gear, and segmented storage of the DDR2SDRAM array is adopted to achieve seamless acquisition within a short time at a rapid speed base gear.

Description

technical field [0001] The invention belongs to the technical field of data acquisition, and more specifically, relates to a segmented storage system based on DDR2SDRAM (Double-Data-Rate Two Synchronous Dynamic Random Access Memory, the second generation of double-data-rate synchronous dynamic random access memory) array Seamless collection method. Background technique [0002] In the time domain measurement at present, the application of the digital storage oscilloscope is more and more extensive. Among the indicators to measure the performance of a digital storage oscilloscope, the waveform capture rate is particularly important. The waveform capture rate refers to the number of waveforms that can be captured and displayed by the oscilloscope per unit time, usually expressed in the number of waveforms per second (wfms / s). It represents the amount of waveform information captured and displayed by the digital storage oscilloscope per unit time. The higher the waveform cap...

AI Technical Summary

Problems solved by technology

However, if the sampling rate is low, it is easy to lose detailed information such as glitches and jitters in the waveform data.

If you want to increase the sampling rate of the slow time base gear, you must increase the storage depth, but when the storage depth increases to a certain extent, the waveform processing speed will slow down due to the increase in the amount of waveform data that needs to be processed. time also increases

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