Method for simultaneously reading and writing memory and data acquisition unit

Abstract

The invention discloses a method for simultaneously reading and writing a memory and a data acquisition device thereof. The method comprises the following steps of: dividing the memory into 2-128 segment memory space sections; setting sampling parameters and starting read / write high bit address; writing acquired data into the memory space section corresponding to the current write high bit address; setting the identifier of the memory space section readable after the acquisition is completed; changing the write high bit address of the current memory section; reading data in the memory space section corresponding to the read high bit address; setting the identifier of the memory space section writable after the reading is completed; and changing the read high bit address of the current memory space section. The device comprises a sensor, a double-end random access memory, a signal processing unit, an A / D converting unit, a control logic, and an USB interface chip. With the segmented buffer storage, the invention can read data while storing data, avoids the read / write conflict on the memory, thereby reducing the time of reading and writing data and improving the speed of data acquiring of the device.

Description

technical field [0001] The present invention relates to the fields of computer, electronic technology and communication, and more specifically relates to a method for simultaneously reading and writing memory, and also relates to a device for simultaneously reading and writing memory. Measuring instruments and various data acquisition devices. Background technique [0002] Data acquisition devices are widely used in production and life. Often a series of data needs to be collected rather than just one data. At this time, the data collected by the sensor is cached in the memory one by one first, and then the cached data is read out from the memory after all the data is collected. Since all data must be written into the memory before it can be read, the speed of data acquisition is greatly limited. [0003] The memories used in the data acquisition device in the prior art mainly include static random access memory (SRAM), dual-port random access memory (DPRAM) and first-in-...

AI Technical Summary

Problems solved by technology

When using the traditional access method, it is necessary to wait for all the data to be cached in the DPRAM before reading it out, and the acquisition speed of the device is greatly limited

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