Data Acquisition System Based on Source Synchronous System

Abstract

The invention discloses a data acquisition system based on a source synchronous system. The data acquisition system includes a sampling controller, a synchronizer, a RAM controller, two caches and a single-port RAM. The sampling controller is used to alternately store the collected data into the two caches under the clock signal of the first clock domain and Send the two handshake signals to the synchronizer, and the synchronizer is used to convert the received handshake signal into a handshake signal synchronized with the active edge of the clock in the second clock domain, so as to control the RAM controller to read the data stored in the single-port RAM and cache Fetch, store, add actions. The data acquisition system based on the source synchronous system of the present invention can save RAM resources and greatly reduce the frequency requirements of the local system clock in high-speed data acquisition on the basis of ensuring the reliability of data transmission by using two caches , saving costs.

Description

technical field [0001] The invention relates to a data acquisition system based on a source synchronous system. Background technique [0002] Data collection is the most primitive and critical part of obtaining information, so it has a wide range of needs and applications in many industries or fields. Especially high-speed data acquisition, with extremely high sampling rate, especially suitable for occasions where the signal changes rapidly. In many application fields, such as distributed optical fiber temperature measurement, the original signal is very weak, and it is usually necessary to repeatedly sample the same data for accumulation and averaging, so as to achieve the purpose of eliminating noise and interference. [0003] Because the general clock system has the drawback of limiting the clock frequency, many high-speed data acquisitions now use source synchronous systems. The so-called source synchronous system means that the data and clock signals sent by the sourc...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the data acquisition system based on the source synchronous system in the prior art. In order to ensure the reliability of data transmission, it cannot be used when the RAM resources are relatively tight, and the requirements for the frequency of the local system clock are too high. , it is difficult to apply to the defect of high-speed data acquisition occasions at a low cost, and a data acquisition system based on source synchronous system is proposed

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