Method, device and system for usb data acquisition

A data acquisition and acquisition system technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of SRAM cost increase, achieve long-term data recording, reduce costs, and facilitate continuous data acquisition.

Active Publication Date: 2016-08-10
GUANGZHOU ZHONO ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution can achieve high-speed data acquisition, but with the continuous improvement of storage depth requirements, the cost of SRAM will increase exponentially

Method used

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  • Method, device and system for usb data acquisition
  • Method, device and system for usb data acquisition
  • Method, device and system for usb data acquisition

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Embodiment Construction

[0031] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0032] SDRAM: namely: Synchronous Dynamic Random Access Memory, synchronous dynamic random access memory, synchronization means that the Memory work needs to synchronize the clock, internal command sending and data transmission are based on it; dynamic means that the storage array needs to be constantly refreshed to ensure The data is not lost; random means that the data is not stored linearly and sequentially, but the address is freely specified for data reading and writing.

[0033] The structure of this solution is FPGA chip + high-speed USB2.0 controller + two sets of SDRAM, and also includes signal conditioning circuit, in which FPGA is used to complete data collection, storage and bridging with USB2.0 controller transmission, high-spe...

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Abstract

The invention discloses a method for USB data collection, comprising: S1. storing continuously collected data in the first group of SDRAMs; S2. judging whether the first group of SDRAMs is full, and if so, enter step S3, If not, return to step S1; S3. read back the first group of SDRAM data, and at the same time, store the new data collected continuously in the second group of SDRAM; S4. judge whether the second group of SDRAM is stored Full, if yes, go to step S5, if not, return to step S3; S5. Read back the second set of SDRAM data. The invention also discloses a device and a system for USB data collection. The implementation of the present invention adopts SDRAM as the data cache, which ensures the bandwidth and depth of data storage on the one hand, and greatly reduces the hardware cost on the other hand.

Description

technical field [0001] The invention relates to the field of USB data acquisition, in particular to a method, device and system for USB data acquisition. Background technique [0002] USB is the abbreviation of Universal Serial BUS (Universal Serial Bus) in English, and its Chinese abbreviation is "Serial Line", which is an external bus standard used to standardize the connection and communication between computers and external devices. It is an interface used in the PC field Technology. USB uses four-wire cables, two of which are serial channels used to transmit data, and the other two provide power for downstream (Downstream) devices. For high-speed and high-bandwidth peripherals, USB transmits data at full speed of 12Mbps ;For low-speed peripherals, USB transmits data at a transmission rate of 1.5Mbps. The USB bus will automatically and dynamically switch between the two transmission modes according to the peripheral situation. USB is a token-based bus. Similar to a token...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/16
Inventor 王波
Owner GUANGZHOU ZHONO ELECTRONICS TECH CO LTD
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