USB interface drive device based on FPGA technology

A USB interface and drive device technology, which is applied in the field of USB interface drive devices, can solve the problems of slow data transmission speed and inapplicability to real-time data acquisition occasions, and achieve the effect of high-speed data transmission

Inactive Publication Date: 2008-03-19
ZHEJIANG UNIV OF TECH +1
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  • Abstract
  • Description
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Problems solved by technology

[0009] In order to overcome the shortcomings of the USB interface drive device that the data transmission speed is slow and cannot be applied to real-time data acquis

Method used

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  • USB interface drive device based on FPGA technology
  • USB interface drive device based on FPGA technology

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Referring to Fig. 1~Fig. 3, a kind of USB interface driving device based on FPGA technology, USB interface driving device is provided with global reset terminal reset and external clock, and described external clock comprises two clock domains; Described USB interface driving device Including: data generation module, used to generate 20 data from 1 to 20 when the low level of reset is collected; CRC check module, used to realize according to the shift register, within one clock cycle, check the incoming 8 The bit parallel data is shifted 8 times to obtain a 16-bit CRC check value; each shift comes in one bit of data in 8 bits, and the order in which the data comes in is from high to low; the sorting of data and CRC check codes Module, used to input data and CRC check code into this module at the same time, output after sorting; add synchronization field and PID ...

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Abstract

The present invention relates to a drive unit for a USB interface based on the technology of FPGA, consisting of a reset end for an overall setting and an external clock which comprises two clock domains. The USB interface comprises a data producing module, a CRC inspecting module, a sorting module of data and CRC checking codes, a parallel-serial conversion module, a bit stuffing module, an NRZI coding module and a data outputting module. The present invention provides a drive unit for a USB interface that is high-speed in data transmission, is applicable to occasions of real-time data collecting and based on the technology of the FPGA.

Description

technical field [0001] The invention belongs to a USB interface driving device. Background technique [0002] In recent years, with the rapid development of the Internet and communication technology, people are no longer satisfied with only using simple text and voice to communicate, but are more inclined to use animation and multimedia with graphics, text and sound to communicate, such as video conferencing, E-commerce, telemedicine and remote monitoring are all hot spots in video image applications. It can be predicted that the 21st century will be a century of widespread application of video images. However, because the video image itself has a huge amount of data, it brings difficulties to transmission and storage, which greatly restricts the development speed of video image applications. For example, according to the recommendation of CCIR 601, the code rate of digital video of ordinary quality TV signal is about 216Mb / s, while that of HDTV is above 1.2Gb / s. Without h...

Claims

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Application Information

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IPC IPC(8): G06F13/42G06F17/50H04N5/765
Inventor 孟利民罗佳波周凯
Owner ZHEJIANG UNIV OF TECH
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