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Universal serial bus device and data exchanging method

A universal serial bus and data exchange technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of data transmission speed delay, USB system performance reduction, etc.

Active Publication Date: 2008-05-28
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the bulk individual transfer method, since only bulk endpoints are used to transmit common data, CBW, and CSW, the buffers storing the data of bulk endpoints must be stored and cleared again and again, because these actions are quite time-consuming. , so that the speed of data transmission is delayed, and the performance of the USB system is reduced

Method used

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  • Universal serial bus device and data exchanging method
  • Universal serial bus device and data exchanging method

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Embodiment Construction

[0019] FIG. 1 is an embodiment of a USB device 100 according to the present invention. The USB device 100 supports both a bulk-only (Bulk-only) transfer method and a control-bulk-interrupt (CBI) transfer method. The USB device 100 includes three buffers, namely a control endpoint buffer (control endpoint buffer) 104, a batch endpoint buffer (bulk endpoint buffer) 106, and an interrupt endpoint buffer (interrupt endpoint buffer) 108. The three buffers 104, 106 and 108 are respectively used to store the data received from the host or to be sent to the host by the control endpoint, bulk endpoint, and interrupt endpoint. The USB device 100 also includes a storage unit 112 for storing data, and a micro-processor (micro-processor) 110 for performing data calculations and controlling the entire USB device 100 including the storage unit 110 and buffers 104, 106, 108 operation.

[0020] The types of data packets transmitted between the USB host and the device have been described abov...

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Abstract

A kind of universal serial bus, that supports bulk-only transmission mode to exchange data with the USB mainframe, includes the bulk endpoint buffer to save the receiving and sending data by the bulk endpoint, and also includes the interrupt endpoint buffer to save the receiving and sending data by the interrupt endpoint; the method of realize the USB, saving the part data by the interrupt endpoint buffer that originally by the bulk endpoint buffer; then use multiplexer to control the USB, the exchange data path of the USB mainframe end is between the USB mainframe end and the bulk endpoint buffer or between the USB mainframe end and the interrupt endpoint end.

Description

technical field [0001] The present invention relates to a universal serial bus, in particular to a universal serial bus device and a data exchange method. Background technique [0002] Universal Serial Bus (USB) is a new type of interface technology for personal computer peripheral devices. The USB protocol has three versions: 1.0, 1.1 and 2.0. Connect up to 127 peripheral devices to the host computer at the same time, featuring fast, bidirectional, plug and play (PnP) and low price. USB interfaces have been widely used in various electronic devices, among which USB mass storage class devices can be used in the design of portable storage devices and digital audio-visual products, so they are widely used, such as portable hard disks, fast Flash disk, digital camera, MP3 player, CD-ROM drive, etc. [0003] The transmission specifications of USB mass storage devices include four independent sub-transmission specifications, among which the more commonly used ones are the bulk-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/12G06F13/38
Inventor 许钰鼎曾俊华
Owner VIA TECH INC