CN103514122B - USB equipment identification enhancing method in VxWorks operation system - Google Patents
USB equipment identification enhancing method in VxWorks operation system Download PDFInfo
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- CN103514122B CN103514122B CN201210221105.0A CN201210221105A CN103514122B CN 103514122 B CN103514122 B CN 103514122B CN 201210221105 A CN201210221105 A CN 201210221105A CN 103514122 B CN103514122 B CN 103514122B
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Abstract
An embodiment of the invention provides a method for enhancing the identification rate of USB equipment at the later state when initial enumeration of the equipment is not successful in a VxWorks operation system. The method comprises the steps that when a protocol stack of a USB mainframe is initialized, after downlink ports of all USB concentrators are scanned, information of the downlink ports of all the USB concentrators is obtained; when all the USB equipment is initialized, enumeration information of all the equipment is obtained; the downlink ports of the USB equipment on the USB concentrators are compared with the enumeration information of the equipment, if the equipment connected with the downlink ports of the USB concentrators is not enumerated successfully, reset operation is conducted on the ports, and therefore the protocol stack of the USB mainframe conducts enumeration operation on the equipment. According to the technical scheme, the identification rate of the USB equipment in the VxWorks operation system can be improved.
Description
Technical field
The present invention relates to USB device strengthens knowledge under usb communication technical field, more particularly to a kind of vxworks operating system
Other method.
Background technology
USB interface has interface unification, plug and play, supports the characteristic such as hot-swappable due to it, and support low speed, full speed,
The different transmission rates such as high speed, disclosure satisfy that the product requirement of different pieces of information transmission performance, and it is obtained in real-time embedded field
Use in a large number.
In vxworks operating system, the initialization of usb host protocol stack, including：1）Usb host controller it is initial
Change, directly control usb host controller hardware, including console controller and hub；2）The initialization of USB device driver, place
Data transfer between reason client software and USB device, realizes the behaviour such as usb bus are enumerated, bus bandwidth distributes, transmission control
Make.The initialization of USB device, including registration device drives, cooperation completes device bus and enumerates, adds in global list of devices
The device name.
When USB device is linked into certain downlink port of hub, the hub can be anti-port status change information
Feed main frame, main frame receives after information, starts to enumerate USB device.If enumerating unsuccessful, main frame can be put and enumerate not
Success Flag, enumerates USB device again.In order to ensure the real-time of system, and the knowledge for not affecting other USB devices
Not, this process for retrying has number of times to limit, generally 3 times.If retrying 3 times, main frame enumerating still not to equipment
Success, system thinks that the equipment is a faulty equipment, can carry out the process of sweep equipment.
The applied environment of embedded system is typically complex, and USB device is usually easily vibrated, either internally or externally
Electromagnetic interference etc. affect.If in the enumeration stage of equipment, just there occurs that vibration or electromagnetic interference etc. affect, cause
USB device is unable to the inquiry bag of normal response usb host, enumerates failure, and the equipment is just unavailable.
The content of the invention
It is an object of the invention to provide one kind is in vxworks operating system, and when equipment initial enumeration is unsuccessful, the later stage
The method for increasing USB device discrimination.
A kind of method for increasing USB device discrimination in vxworks operating system of the present invention, methods described includes following
Step：
(1) after the completion of the initialization of usb host protocol stack, the downlink port information of all usb hubs is obtained；
(2) after the completion of USB device initialization, all devices enumerations information is obtained；
(3) the downstream end message of unsuccessful USB device information all connection USB devices with usb hub will be enumerated
Breath is compared, and obtains enumerating hub number and the port numbers that unsuccessful USB device is connected；
(4) downlink port to enumerating the hub that unsuccessful USB device is connected resets, so that usb host
Protocol stack carries out enumeration operation to the equipment again.The discrimination of USB device in vxworks operating system can so be increased.
The system for increasing USB device discrimination in a kind of vxworks operating system of the present invention, the system includes：
Usb hub port information acquisition module, for when the initialization of usb host protocol stack, usb hub downlink port
After the completion of scanning, the information of all usb hub downlink ports is obtained, and be sent to information comparison module；
USB device enumeration data obtaining module, for after the completion of USB device initialization, obtaining all USB device enumerations
Information, and it is sent to information comparison module；
Information comparison module, reception usb hub port information acquisition module and USB device enumeration data obtaining module
Information, the downlink port information of all connection USB devices is carried out with usb hub will to enumerate unsuccessful USB device information
Compare, obtain enumerating hub number and the port numbers that unsuccessful USB device is connected, and be sent to usb hub port reset
Module；
Usb hub port reset module, the information that receive information comparing module is sended over, by the finger of usb hub
Fixed end mouth carries out reset operation.
The present invention proposes a kind of method and system for strengthening USB device discrimination under vxworks operating system.In behaviour
In making system boot process, in the event of electromagnetic interference, or because the reason such as vibration causes USB information transmission fault, can lead
Cause USB device identification error or None- identified.The method of the invention can effectively promote USB device in different degrees of electromagnetism
Normal identification and work under interference or vibration condition, it is to avoid USB device recognizes the appearance of problem during system boot,
USB device discrimination is improve, the environmental suitability of USB device is enhanced.
After the completion of booting operating system, if USB device is not identified, user typically can be by the plug equipment
USB cable, so that system is enumerated the equipment again, the purpose that the equipment of reaching can be used.If a plug does not have
Identification, user can also carry out multiple plug operation.Such plug operation can cause a certain degree of infringement to USB interface, most
Cause interface unavailable eventually.The present invention by the method for software come to without be identified USB device initiate enumeration operation again,
It is not required to manual intervention；While USB device discrimination is improved, there is no any infringement to hardware, it is ensured that USB interface and equipment
Stability and dependability.
, just for the reset operation that the equipment uplink port is carried out without identified equipment, the operation is at one for the present invention
Carry out in independent task, do not interfere with the communication of other USB devices and main frame, it is ensured that the real-time of system.
The features such as USB device has life cycle length, device category is more, this is also caused under vxworks operating system, such as
What lifts USB device discrimination and related fault-toleranr technique becomes one of bottleneck for improving in the equipment availability research process.This
Invention can efficiently solve the problem.
By binding with VxWorks usb protocol stack, can provide enhancement mode usb protocol stack software based on the present invention and produce
Product, or for client provide under vxworks operating system improve USB device discrimination total solution, help user and
When efficiently solve USB device produced problem under relevant environment, save user in manpower, material resources, the related throwing in financial resources
Enter, this is also the embodiment of achievement of the present invention economic worth in application process, while it is special as civilian invention to enhance the achievement
The feasibility and necessity of profit.
Description of the drawings
Fig. 1 is the flowchart of increase USB device discrimination method provided in an embodiment of the present invention；
Fig. 2 is the structured flowchart of increase USB device discrimination system provided in an embodiment of the present invention.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.Based on the embodiment in the present invention,
Only to explain the present invention, it is not intended to limit the present invention.
In the present embodiment, after the completion of the initialization of usb host protocol stack, all usb hub downlink port scannings, obtain
The downlink port information of all usb hubs；After the completion of the initialization of all USB devices, each device enumeration information is obtained；General piece
The downlink port information of all connection USB devices is compared with usb hub to lift unsuccessful USB device information, is obtained
Enumerate hub number and port numbers that unsuccessful USB device is connected；To enumerating the line concentration that unsuccessful USB device is connected
The downlink port of device is resetted, so that usb host protocol stack carries out enumeration operation to the equipment again.So can increase
The discrimination of the USB device in vxworks operating system.
Fig. 1 shows the increase USB device discrimination method in vxworks operating system provided in an embodiment of the present invention
Flow process is realized, it comprises the following steps that described：
In step sl, the initialization of usb host protocol stack, the scanning of hub downlink port is waited to complete.
In embodiments of the present invention, after the initialization of usb host protocol stack, need the regular hour to scan all USB sets
The downlink port information of line device.In order to get the correct information of all usb hub downlink ports, it is necessary to wait USB set line
The scanning of device downlink port is completed.
In step s 2, all usb hub downlink port information are obtained.
In embodiments of the present invention, usb hub downlink port information has following content：1）Connectionless equipment；2）Cascade
HUB；3）Connection equipment, obtains instrument factory trading company, production number and released version number.Structure is as follows：
{ USBD_NODE_ID hubId；/ * usb hub */
USBD_NODE_ID devId；/ * USB devices number（0：Without equipment；1：Usb hub；Other：Connection equipment
Number） */
UINT16 portIndex；/ * hub side slogans, from 0 start counting up */
} USB_HUB_DEV_INFO, *pUSB_HUB_DEV_INFO；
In step s3, all USB devices are initialized.
The USB device of usb hub in all connections is initialized, so that main frame is enumerated USB device.
In step s 4, all USB device enumeration information are obtained.
Main frame is obtained to information during all USB device enumerations, there is following content：USB device number and USB device enumeration into
Work(mark.Structure is as follows：
typedef struct usb_dev_info
{ USBD_NODE_ID devId;/ * USB device */
UINT16 attachFlag;/ * enumerates Success Flag（1：Success；0：It is unsuccessful）*/
} USB_DEV_INFO, *pUSB_DEV_INFO;
In step s 5, judge whether all USB devices are all enumerated successfully, be to terminate, otherwise perform S6.
In step s 6, USB device enumeration information is compared with usb hub downlink port information, and acquisition is enumerated not
Usb hub number and the port numbers of place usb hub that successfully USB device is connected.
In the step s 7, reset and enumerate the port that unsuccessful USB device connects usb hub.
In embodiments of the present invention, the port that usb hub is connected to enumerating unsuccessful USB device resets,
Usb host can be caused to carry out an enumeration operation to the USB device again.
In step s 8, time delay is for a period of time.
In embodiments of the present invention, usb host carries out enumeration operation to the USB device after hub port reset, needs
A period of time just can complete.Therefore after the time delay for a period of time of this step, it is again introduced into step S4.
In the present embodiment, as long as there is USB device not enumerate successfully, this five steps of S4 to S8 will be repeated, until
All USB devices are all enumerated successfully.So the mistake that USB device can not be recognized caused by the reasons such as electromagnetic interference is arranged as far as possible
Remove, increased the discrimination of the USB device in vxworks operating system.
Fig. 2 shows the increase USB device discrimination system in vxworks operating system provided in an embodiment of the present invention
Structured flowchart, for convenience of description, only gives the part related to the embodiment of the present invention in figure.
Usb hub port information acquisition module 11, for when the initialization of usb host protocol stack, usb hub downstream end
After the completion of mouth scanning, the information of all usb hub downlink ports, including usb hub number, USB device number and line concentration are obtained
Device port numbers.
USB device enumeration data obtaining module 12, for after the completion of USB device initialization, obtaining all USB devices piece
Act information, including：USB device number and enumerate Success Flag.
Information comparison module 13, for unsuccessful USB device information will to be enumerated with all connection USB on usb hub
The downlink port information of equipment is compared, and obtains enumerating hub number and the port numbers that unsuccessful USB device is connected；
Usb hub port reset module 14, for the usb hub that unsuccessful USB device is connected will to be enumerated
Port carries out reset operation.
A system embodiment of the present invention is above are only, wherein, for example above-mentioned method of function of the modules of the system
Described in embodiment, will not be described here, but not to limit the present invention.
In embodiments of the present invention, when usb host protocol stack is initialized, all usb hub downlink port scannings are completed
Afterwards, the downlink port information of all usb hubs is obtained；After the completion of the initialization of all USB devices, each device enumeration letter is obtained
Breath；Unsuccessful USB device information will be enumerated, and the downlink port information of all connection USB devices is compared with usb hub
It is right, obtain enumerating hub number and the port numbers that unsuccessful USB device is connected；Connect to enumerating unsuccessful USB device
The downlink port of the hub for connecing is resetted, so that usb host protocol stack carries out enumeration operation to the equipment again.The present invention
Technical scheme can increase the discrimination of the USB device in vxworks operating system.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention.All essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (2)
1. it is a kind of in vxworks operating system increase USB device discrimination method, it is characterised in that methods described includes
Following step：
(1) after the completion of the initialization of usb host protocol stack, the downlink port information of all usb hubs is obtained；
(2) after the completion of USB device initialization, all devices enumerations information is obtained；
(3) the downlink port information of all connection USB devices is entered with usb hub will to enumerate unsuccessful USB device information
Row is compared, and obtains enumerating hub number and the port numbers that unsuccessful USB device is connected；
(4) downlink port to enumerating the hub that unsuccessful USB device is connected resets, so that usb host agreement
Stack carries out enumeration operation to the equipment again, can so increase the discrimination of USB device in vxworks operating system.
2. it is a kind of in vxworks operating system increase USB device discrimination system, it is characterised in that the system is also wrapped
Include following modules：
Usb hub port information acquisition module, for when the initialization of usb host protocol stack, the scanning of usb hub downlink port
After the completion of, the information of all usb hub downlink ports is obtained, and it is sent to information comparison module；
USB device enumeration data obtaining module, for after the completion of USB device initialization, obtaining all USB device enumeration letters
Breath, and it is sent to information comparison module；
Information comparison module, receives the letter of usb hub port information acquisition module and USB device enumeration data obtaining module
Breath, the downlink port information of all connection USB devices is compared with usb hub will to enumerate unsuccessful USB device information
It is right, obtain enumerating hub number and the port numbers that unsuccessful USB device is connected, and it is sent to usb hub port reset mould
Block；
Usb hub port reset module, the information that receive information comparing module is sended over, by the designated ends of usb hub
Mouth carries out reset operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210221105.0A CN103514122B (en) | 2012-06-29 | 2012-06-29 | USB equipment identification enhancing method in VxWorks operation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210221105.0A CN103514122B (en) | 2012-06-29 | 2012-06-29 | USB equipment identification enhancing method in VxWorks operation system |
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| CN103514122B true CN103514122B (en) | 2017-04-19 |
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| CN105100006A (en) * | 2014-05-07 | 2015-11-25 | 杭州迪普科技有限公司 | Proxy service device and remote control device and method |
| CN112437335B (en) * | 2020-11-11 | 2023-01-24 | 海信视像科技股份有限公司 | Display device and external device connection processing method thereof |
| CN114372017B (en) * | 2022-01-04 | 2023-12-12 | 中国大恒(集团)有限公司北京图像视觉技术分公司 | Enumeration method without affecting normal operation of CXP equipment |
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| CN101609408A (en) * | 2009-06-19 | 2009-12-23 | 中兴通讯股份有限公司 | A kind of method and system that realize self-start of terminal equipment |
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| CN102339259A (en) * | 2010-07-27 | 2012-02-01 | 董建飞 | Device and method for operating USB (universal serial bus) interface equipment |
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| KR100368179B1 (en) * | 2000-11-13 | 2003-01-24 | 이호준 | Screen/ IP phone for information system using local area network |
| CN100371847C (en) * | 2005-09-22 | 2008-02-27 | 深圳市江波龙电子有限公司 | Method for ciphering and diciphering of file, safety managing storage apparatus and system method thereof |
| CN100493100C (en) * | 2006-06-15 | 2009-05-27 | 北京中星微电子有限公司 | USB time sequence adaptive device, interface and its communication method |
| CN101567052B (en) * | 2008-04-21 | 2011-04-06 | 北京同方微电子有限公司 | System and method for issuing intelligent card with USB interface |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609408A (en) * | 2009-06-19 | 2009-12-23 | 中兴通讯股份有限公司 | A kind of method and system that realize self-start of terminal equipment |
| CN102103528A (en) * | 2009-12-22 | 2011-06-22 | 杭州华三通信技术有限公司 | Device and method for carrying out recovery control on exceptions of USB (universal serial bus) device identification and USB host |
| CN102339259A (en) * | 2010-07-27 | 2012-02-01 | 董建飞 | Device and method for operating USB (universal serial bus) interface equipment |
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Granted publication date: 20170419 |