CN103455450B - USB (universal serial bus) device communication method - Google Patents
USB (universal serial bus) device communication method Download PDFInfo
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- CN103455450B CN103455450B CN201310431362.1A CN201310431362A CN103455450B CN 103455450 B CN103455450 B CN 103455450B CN 201310431362 A CN201310431362 A CN 201310431362A CN 103455450 B CN103455450 B CN 103455450B
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Abstract
The invention provides a technical scheme of a USB (universal serial bus) device communication method. By the method, data exchange of a computer and a USB device can be performed through a USB interface under a real mode, a system which is started up under the real mode can communicate with the USB device, and the USB device is enumerated into USB storage devices, so that the USB device is taken as one USB storage device by the computer during POST; a control program is interrupted through a BIOS (basic input/output system), so that a computer software can obtain disk sector information of the USB storage device. Interaction with the USB device can be performed by means of reading and writing a disk sector, and thus the communication problem of the USB device under the condition of having no operating system is solved.
Description
Technical field
The present invention relates to a kind of main method that computer is interacted with usb device talk in real mode, it is applied to computer and usb device talk every field.
Background technology
In the prior art, known technology is secured physical xegregating unit is well-known physical isolation safety product, it meets " information security technology network and terminal unit isolated part safety specifications " in " National Standard of the People's Republic of China ", but it is a kind of passive physical security Protection Product, it is arranged on the secured physical xegregating unit on every main frame, the pcie interface of machine is also less and less now, the pcie slot of each producer of pc machine controls disunity, and there is compatibility issue in the display card that the physical isolation equipment for network safety of pcie communication interface and machine are joined.
Similar products on the market, or starting-up interface running software is under an operating system, is vulnerable to the attack of viral wooden horse and speed are slower, or realizing complicated usb equipment bottom layer driving, compatibility is poor.This is the weak point existing for prior art.
Content of the invention
The purpose of the present invention is aiming at the deficiency existing for prior art, and a kind of technical scheme of usb device talk method is provided, with usb device talk under the real pattern that the method for the program can be implemented in during system start-up, solve the usb device talk difficult problem in the case of no operating system.
This programme is achieved by the following technical measures: a kind of usb device talk method, realizes being the exchange that under pattern, computer and usb equipment carry out data by usb interface, comprises the steps:
1) pre-install startup program in a computer；
2) start computer, load startup program under computer real pattern, and check whether usb interface connects equipment, if connecting usb equipment, entering step 3), not connecting equipment, then terminate this program, normally start computer；
3) usb device enumeration is become usb storage device by computer；
4) computer issues read write command to usb storage device, and usb storage device is effectively communicated by intercepting read write command；
5) inquiry of usb storage device intercepts usb read-write packet, carries out data check ratio, after verification is correct, carries out data exchange；Check errors, terminate communication, and computer normally starts.
The beneficial effect of this programme can be learnt according to the narration of such scheme, due to being communicated with usb equipment in real mode in this scenario, usb device enumeration is become usb storage type equipment, thus computer is during post, usb equipment is thought into a usb storage device.By bios interrupt control routine, under real pattern, computer software just can get the disk sector information of usb storage device, carries out interacting with usb equipment by the method reading and writing disk sector.
As can be seen here, the present invention compared with prior art, has prominent substantive distinguishing features and significantly improves, and the beneficial effect that it is implemented is also obvious.
Specific embodiment
For the technical characterstic of this programme can be clearly described, below by a specific embodiment, this programme is illustrated.
The usb device talk method of this programme, realizes being the exchange that under pattern, computer and usb equipment carry out data by usb interface, comprises the steps:
1) pre-install startup program in a computer；
2) when starting computer, load startup program under the real pattern of computer, and calculate whether machine check usb interface connects equipment, if connecting usb equipment, entering step 3), not connecting usb equipment, then computer normally starts；
3) usb device enumeration is become usb storage device by computer；
4) read write command is issued by computer software usb storage device, usb equipment is effectively communicated by intercepting read write command；
5) inquiry of usb storage device intercepts usb read-write packet, carries out data check ratio, after verification is correct, carries out data exchange；Check errors, terminate communication, and computer normally starts.
The present invention is not limited in above-mentioned specific embodiment, change, remodeling, interpolation or replacement that those of ordinary skill in the art make in the essential scope of the present invention, also should belong to protection scope of the present invention.
Claims (1)
1. a kind of usb device talk method, realizes, by usb interface, the exchange that computer and usb equipment under real pattern carry out data, comprises the steps:
1) pre-install startup program in a computer；
2) start computer, load startup program under computer real pattern, and check whether usb interface connects equipment, if connecting usb equipment, entering step 3), not connecting equipment, then terminate this program, normally start computer；
3) during post, usb device enumeration is become usb storage device to computer by computer；
4) under real pattern, computer software just can get the disk sector information of usb storage device, carry out interacting with usb equipment by the method reading and writing disk sector, computer issues read write command to usb storage device, and usb storage device is effectively communicated by intercepting read write command；
5) inquiry of usb storage device intercepts usb read-write packet, carries out data check ratio, after verification is correct, carries out data exchange；Check errors, terminate communication, and computer normally starts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431362.1A CN103455450B (en) | 2013-09-22 | 2013-09-22 | USB (universal serial bus) device communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431362.1A CN103455450B (en) | 2013-09-22 | 2013-09-22 | USB (universal serial bus) device communication method |
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| Publication Number | Publication Date |
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| CN103455450A CN103455450A (en) | 2013-12-18 |
| CN103455450B true CN103455450B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310431362.1A Active CN103455450B (en) | 2013-09-22 | 2013-09-22 | USB (universal serial bus) device communication method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9311504B2 (en) | 2014-06-23 | 2016-04-12 | Ivo Welch | Anti-identity-theft method and hardware database device |
Citations (4)
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| CN101187876A (en) * | 2007-12-11 | 2008-05-28 | 铁道第三勘测设计院集团有限公司 | Parasitic DOS operation system manufacture and its usage method |
| CN101222697A (en) * | 2007-01-09 | 2008-07-16 | 上海晨兴电子科技有限公司 | Method for using mobile terminal as computer extended application |
| CN101490645A (en) * | 2006-07-10 | 2009-07-22 | Vm设备有限公司 | Method and apparatus for virtualization of appliances |
| CN101571804A (en) * | 2008-04-29 | 2009-11-04 | 苏州宇达电通有限公司 | Universal serial bus (USB) input device system with disk operation system (DOS) starting command and starting method thereof |
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2013
- 2013-09-22 CN CN201310431362.1A patent/CN103455450B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490645A (en) * | 2006-07-10 | 2009-07-22 | Vm设备有限公司 | Method and apparatus for virtualization of appliances |
| CN101222697A (en) * | 2007-01-09 | 2008-07-16 | 上海晨兴电子科技有限公司 | Method for using mobile terminal as computer extended application |
| CN101187876A (en) * | 2007-12-11 | 2008-05-28 | 铁道第三勘测设计院集团有限公司 | Parasitic DOS operation system manufacture and its usage method |
| CN101571804A (en) * | 2008-04-29 | 2009-11-04 | 苏州宇达电通有限公司 | Universal serial bus (USB) input device system with disk operation system (DOS) starting command and starting method thereof |
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| CN103455450A (en) | 2013-12-18 |
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