CN1542633A - Universal serial bus interface bridge of digital camera - Google Patents
Universal serial bus interface bridge of digital camera Download PDFInfo
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- CN1542633A CN1542633A CNA031167160A CN03116716A CN1542633A CN 1542633 A CN1542633 A CN 1542633A CN A031167160 A CNA031167160 A CN A031167160A CN 03116716 A CN03116716 A CN 03116716A CN 1542633 A CN1542633 A CN 1542633A
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Abstract
The USB bridge for digital camera includes CPU, digital camera interface and hard disc interface. The digital camera interface is used in connecting with digital camera for detecting the connection state of digital camera, realizing USB interface and communicating with the digital camera under the control of the CPU. The hard disc interface is used to connect great capacity USB memory device for detecting the state of the great capacity USB memory device, realizing USB interface and communicating with the great capacity USB memory device under the control of the CPU. The CPU is used in realizing USB protocol stack, data transmission and man-machine interface. Using standard U disc as outer storing device for digital camera can eliminate the limitation of digital camera in memory capacity.
Description
Technical field
The present invention relates to digital camera USB bridge.
Background technology
USB (USB (universal serial bus)) interface is an asymmetrical communication protocol standard, is divided into master/slave two kinds of interfaces.USB interface on the present digital camera generally provides as the USB slave unit.This makes that being connected of digital camera and computing machine is very convenient.But, because a large amount of USB (universal serial bus) mass-memory units (USB mass storage device) such as USB flash disk/USB hard disk also all are the USB slave units, this makes digital camera can't directly be connected with USB flash disk/USB mass-memory units such as USB hard disk, thereby restricted the memory capacity of digital camera, especially for use occasions of shooting for a long time such as out on tours, the deficiency of memory capacity has obviously been brought inconvenience to people.
Summary of the invention
The object of the present invention is to provide a kind of digital camera USB bridge, after using this bridge, digital camera and USB flash disk/USB mass-memory units such as USB hard disk can be coupled together, thereby expanded the memory capacity of digital camera greatly, conveniently go out, tourism etc. taken occasion for a long time and used.
A kind of digital camera USB of the present invention bridge, it is characterized in that: it comprises central controller, the digital camera interface that links to each other with central controller respectively and hard-disk interface, the external digital camera of digital camera interface, hard-disk interface circumscribed USB mass-memory unit, wherein: digital camera interface, be used to detect the connection status of digital camera, realize the usb bus interface, and under the control of central controller, carry out communication with digital camera; Hard-disk interface is used to detect the state of USB (universal serial bus) mass-memory unit, realizes the usb bus interface, and under the control of central controller and the USB (universal serial bus) mass-memory unit carry out communication; Central controller, be used to realize usb protocol stack, data transmission and man-machine interface, wherein the usb protocol stack comprises that the USB system, the master controller that define in the USB standard drive and USB drives, when central controller obtains the status change notification of digital camera interface or hard-disk interface, it just is prompted to the user to new state; In the time of the user command copies data, central controller detects whether normally connected digital camera and USB (universal serial bus) mass-memory unit by two interfaces; If have at least one not connect, just point out the user to copy failure; Otherwise, just do copy work; During copy, central controller reads out the content block-by-block in the digital camera by its inner usb protocol stack and outside digital camera interface, by its inner usb protocol stack and outside hard-disk interface the content of reading being write the USB (universal serial bus) mass-memory unit in the mode of file then gets on, all copied up to all data, prompting user copy is finished.
Adopted above-mentioned technical solution, can adopt the exterior storage of the USB flash disk of standard, made full use of existing equipment, reduced the demand of various digital camera stores cards as digital camera.Take occasion for a long time go out, tourism etc. in addition, data are saved in the USB hard disk, avoided the restriction of the capacity of taking.Use the present invention can carry portable machine, thereby on weight, still all alleviated the burden of going out economically.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is the first embodiment of the invention structural representation;
Fig. 3 is the second embodiment of the invention structural representation.
Embodiment
As shown in Figure 1, digital camera USB bridge of the present invention is made up of three parts, is respectively central controller 1, digital camera interface 2 and hard-disk interface 3.Central controller 1 links to each other with hard-disk interface 3 with digital camera interface 2 respectively, digital camera interface 2 external digital cameras, hard-disk interface 3 circumscribed USB mass-memory units.
Hard-disk interface 3 is responsible for detecting the state of USB (universal serial bus) mass-memory unit (USB mass storagedevice), realize the usb bus interface, and under the control of central controller 1, carry out communication with USB (universal serial bus) mass-memory unit (USB mass storage device).
Central controller 1 is realized usb protocol stack, data transmission and man-machine interface.Wherein the usb protocol stack comprises that the USB system (USB System), the master controller that define in the USB standard drive (Host ControllerDriver) and USB drives (USB Driver).When central controller 1 obtains the status change notification of digital camera interface 2 or hard-disk interface 3, it just is prompted to the user to new state.In the time of the user command copies data, central controller 1 detects whether normally connected digital camera and USB (universal serial bus) mass-memory unit by two interfaces.If have at least one not connect, just point out the user to copy failure.Otherwise, just do copy work.During copy, central controller 1 takes out the content block-by-block degree in the digital camera by its inner usb protocol stack and outside digital camera interface 2, by its inner usb protocol stack and outside hard-disk interface 3 content of reading is write USB (universal serial bus) mass-memory unit (USB mass storage device) in the mode of file then and gets on.All copied up to all data, prompting user copy is finished.
As shown in Figure 2, can adopt HHCF5272-K1 type core board in the HHCF5272-LCD-IDE-R1 built-in Linux development kit of magnificent permanent network technology (Hefei) company limited and HHCF5272-LCD-IDE-R1-Simp type interface board realize central controller 1 '.Adopt the SL811HS chip of two U.S. CypressSemiconductor Corporation, that is: USB on-line selection controller (USBOTG chip) is set to the USB master controller, realize respectively digital camera interface 2 ' and hard-disk interface 3 '.
As shown in Figure 3, adopt HHCF5272-K1 type core board and HHCF5272-LCD-IDE-R1-Simp type interface board in the HHCF5272-LCD-IDE-R1 built-in Linux development kit of magnificent permanent network technology (Hefei) company limited to realize central controller 1 ".Adopt the SL811HS chip of a slice U.S. Cypress SemiconductorCorporation, be set to USB master controller 2 "; CY7C65113 (usb hub) chip 3 by a slice Cypress " is separated into two interfaces, realizes digital camera interface and hard-disk interface respectively again.
Claims (4)
1. digital camera USB bridge, it is characterized in that: it comprises central controller, the digital camera interface that links to each other with central controller respectively and hard-disk interface, the external digital camera of digital camera interface, hard-disk interface circumscribed USB mass-memory unit, wherein:
Digital camera interface is used to detect the connection status of digital camera, realizes the usb bus interface, and under the control of central controller and digital camera carry out communication;
Hard-disk interface is used to detect the state of USB (universal serial bus) mass-memory unit, realizes the usb bus interface, and under the control of central controller and the USB mass-memory unit carry out communication;
Central controller, be used to realize usb protocol stack, data transmission and man-machine interface, wherein the usb protocol stack comprises that the USB system, the master controller that define in the USB standard drive and USB drives, when central controller obtains the status change notification of digital camera interface or hard-disk interface, it just is prompted to the user to new state; In the time of the user command copies data, central controller detects whether normally connected digital camera and USB (universal serial bus) mass-memory unit by two interfaces; If have at least one not connect, just point out the user to copy failure; Otherwise, just do copy work; During copy, central controller takes out the content block-by-block degree in the digital camera by its inner usb protocol stack and outside digital camera interface, by its inner usb protocol stack and outside hard-disk interface the content of reading being write the USB (universal serial bus) mass-memory unit in the mode of file then gets on, all copied up to all data, prompting user copy is finished.
2. a kind of digital camera USB bridge according to claim 1 is characterized in that: described digital camera interface and hard-disk interface can adopt the USB master controller to realize respectively.
3. a kind of digital camera USB bridge according to claim 1 is characterized in that: described digital camera interface and hard-disk interface can adopt a USB master controller to distribute afterwards by a usb hub respectively and realize.
4. according to claim 2 or 3 described a kind of digital camera USB bridges, it is characterized in that: described USB master controller is a USB on-line selection controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031167160A CN1542633A (en) | 2003-04-30 | 2003-04-30 | Universal serial bus interface bridge of digital camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031167160A CN1542633A (en) | 2003-04-30 | 2003-04-30 | Universal serial bus interface bridge of digital camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1542633A true CN1542633A (en) | 2004-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA031167160A Pending CN1542633A (en) | 2003-04-30 | 2003-04-30 | Universal serial bus interface bridge of digital camera |
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| CN (1) | CN1542633A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141727B (en) * | 2007-10-19 | 2011-06-01 | 孟智平 | Switch storage method and related equipment of terminal data |
| CN102004864B (en) * | 2009-08-28 | 2013-03-13 | 台达电子工业股份有限公司 | Data transmission and anti-copying method for human-computer interface device by using mass storage levels |
| CN101939735B (en) * | 2008-02-05 | 2013-12-25 | 萨基姆国防安全公司 | Mass storage device and storage system |
-
2003
- 2003-04-30 CN CNA031167160A patent/CN1542633A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141727B (en) * | 2007-10-19 | 2011-06-01 | 孟智平 | Switch storage method and related equipment of terminal data |
| CN101939735B (en) * | 2008-02-05 | 2013-12-25 | 萨基姆国防安全公司 | Mass storage device and storage system |
| CN102004864B (en) * | 2009-08-28 | 2013-03-13 | 台达电子工业股份有限公司 | Data transmission and anti-copying method for human-computer interface device by using mass storage levels |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |