CN108366129A - USB data transmission method, device and USB adapter - Google Patents
USB data transmission method, device and USB adapter Download PDFInfo
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- CN108366129A CN108366129A CN201810191669.1A CN201810191669A CN108366129A CN 108366129 A CN108366129 A CN 108366129A CN 201810191669 A CN201810191669 A CN 201810191669A CN 108366129 A CN108366129 A CN 108366129A
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- usb
- equipment
- transactions requests
- device adapter
- processing transactions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Transfer Systems (AREA)
Abstract
The present invention provides the working method of USB adapter and USB adapters, are related to USB technical fields.USB data transmission method provided by the invention, from device adapter after receiving the processing transactions requests that upstream end is sent out, while will handle transactions requests and be sent to USB from equipment, transactions requests will be also handled to be stored in the region reserved in downstream, in turn, after receiving the NAK response receipts that USB is generated from equipment from device adapter, initiation that can be spontaneous is retransmitted, it no longer needs to initiate to retransmit by upstream end, workflow is simplified, the expense for carrying out data transmission between upstream end and downstream is controlled.
Description
Technical field
The present invention relates to USB technical fields, in particular to the working method and USB adapter of USB adapter.
Background technology
With the progress of electronic technology, USB data transmission technology is more ripe.Execute the both ends of USB data transmission technology
It is upstream end and downstream respectively, specifically, upstream end is divided into USB main equipment (USB-Host, such as PC machine) and main equipment is suitable
Orchestration (USB Host Adaptor)；Downstream is divided into USB from equipment (USB-Device, such as USB storage device) and from equipment
Adapter (USB Device Adaptor).
When carrying out USB data transmission, in general, being to initiate to operate by upstream end first, controlled by USB main equipment,
Main equipment adapter first can send transactions requests to from device adapter, then, can turn the transactions requests from device adapter
USB is issued from equipment, so that USB is handled from equipment for the transactions requests.
But in fact, USB from equipment when receiving the transactions requests, benefit may be not yet ready for manage the affairs asking
It asks.
Invention content
The purpose of the present invention is to provide the working method of USB adapter and USB adapters.
In a first aspect, an embodiment of the present invention provides USB data transmission methods, including：
The processing transactions requests that upstream end is sent out are received from device adapter；It includes IN transactions requests to handle transactions requests
Or OUT transaction request；
Transactions requests will be handled from device adapter to send to USB from equipment；
It is stored in corresponding target storage from device adapter by transactions requests are handled, under the target storage is located at
It swims in end equipment；
If receiving the NAK response receipts that USB is generated from equipment from device adapter, from device adapter from target
Processing transactions requests are transferred in memory block, and the processing transactions requests being deployed into are sent to USB from equipment.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein step
If receiving the NAK response receipts that USB is generated from equipment from device adapter suddenly, from device adapter from target storage
Processing transactions requests are transferred, and sends the processing transactions requests being deployed into from equipment to USB and includes：
From device adapter after receiving the NAK response receipts that USB is generated from equipment, the first timing is proceeded by,
And when the first timing reaches preset first threshold, processing transactions requests are transferred from device adapter from target storage, and
The processing transactions requests being deployed into are sent to USB from equipment；The time span of first timing with receive about processing affairs ask
The being proportionate property of number for the NAK response receipts asked.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiments of first aspect, wherein step
If receiving the NAK response receipts that USB is generated from equipment from device adapter suddenly, from device adapter from target storage
Processing transactions requests are transferred, and sends the processing transactions requests being deployed into from equipment to USB and includes：
When the second timing reaches preset second threshold, and USB has been received from device adapter and is generated from equipment
NAK response receipts when, then transfer processing transactions requests from device adapter from target storage, and send to USB from equipment
The processing transactions requests being deployed into；Second timing is when sending processing transactions requests to USB from equipment from device adapter
It proceeds by；The time span of second timing and the number about the NAK response receipts of processing transactions requests is received in just
Correlation.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiments of first aspect, wherein step
If receiving the NAK response receipts that USB is generated from equipment from device adapter suddenly, from device adapter from target storage
Processing transactions requests are transferred, and sends the processing transactions requests being deployed into from equipment to USB and includes：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then at once from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiments of first aspect, wherein step
If receiving the NAK response receipts that USB is generated from equipment from device adapter suddenly, from device adapter from target storage
Processing transactions requests are transferred, and sends the processing transactions requests being deployed into from equipment to USB and includes：
When third timing reaches preset third threshold value, and USB is not received from device adapter and is generated just from equipment
When really replying message, then processing transactions requests are transferred from device adapter from target storage, and transfer to USB from equipment transmission
The processing transactions requests arrived；Third timing be from device adapter will handle transactions requests to USB since when equipment is sent
It carries out；The time span of third timing is proportionate about the number of NAK response receipts of processing transactions requests with receiving
Property.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiments of first aspect, wherein step
If receiving the NAK response receipts that USB is generated from equipment from device adapter suddenly, from device adapter from target storage
Processing transactions requests are transferred, and sends the processing transactions requests being deployed into from equipment to USB and includes：
When the 4th timing reaches preset 4th threshold value, and USB is not received from device adapter and is generated just from equipment
When really replying message, then PING instructions are sent from device adapter to USB from equipment；If receive USB from equipment return about
The reply of PING instructions then transfers processing transactions requests from device adapter from target storage, and sends and adjust to USB from equipment
The processing transactions requests got；4th timing be from device adapter will handle transactions requests sent to USB from equipment when open
What the beginning carried out；The time span of 4th timing and receive about processing transactions requests NAK response receipts number be in positive
Guan Xing.
With reference to first aspect, an embodiment of the present invention provides the 6th kind of possible embodiments of first aspect, wherein step
If receiving the NAK response receipts that USB is generated from equipment from device adapter suddenly, from device adapter from target storage
Processing transactions requests are transferred, and sends the processing transactions requests being deployed into from equipment to USB and includes：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then from device adapter to
USB sends PING instructions from equipment；If receiving USB returns to the reply instructed about PING from equipment, from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
Second aspect, the embodiment of the present invention additionally provide USB adapter, including：
Receiving module, the processing transactions requests sent out for receiving upstream end；It includes that IN affairs are asked to handle transactions requests
It asks or OUT transaction is asked；
Sending module is sent for that will handle transactions requests to USB from equipment；
Preserving module is stored in corresponding target storage for that will handle transactions requests, and the target storage is located at
In downstream-end device；
Retransmit module, for when receiving the NAK response receipts that USB is generated from equipment from device adapter, then from
Processing transactions requests are transferred in target storage, and the processing transactions requests being deployed into are sent to USB from equipment.
In conjunction with second aspect, an embodiment of the present invention provides the first possible embodiments of second aspect, wherein weight
Module is sent out, is further used for after receiving the NAK response receipts that USB is generated from equipment, proceeds by the first timing, and work as
When first timing reaches preset first threshold, processing transactions requests are transferred from device adapter from target storage, and to USB
The processing transactions requests being deployed into are sent from equipment；It the time span of first timing and receives about processing transactions requests
The being proportionate property of number of NAK response receipts.
In conjunction with second aspect, an embodiment of the present invention provides second of possible embodiments of second aspect, wherein weight
Module is sent out, is further used for reaching preset second threshold when the second timing, and USB has been received from setting from device adapter
When the standby NAK response receipts generated, then transfer processing transactions requests from device adapter from target storage, and to USB from
Equipment sends the processing transactions requests being deployed into；Second timing is will to handle transactions requests to USB from setting from device adapter
It is proceeded by when preparation is sent；The time span of second timing and receive the NAK response receipts about processing transactions requests
Being proportionate property of number.
USB data transmission method provided in an embodiment of the present invention is receiving what upstream end was sent out from device adapter
After handling transactions requests, while will handle transactions requests and be sent to USB from equipment, it will also handle transactions requests and be stored in
In the region reserved in downstream, in turn, returned when receiving the NAK responses that USB is generated from equipment from device adapter
After holding, initiation that can be spontaneous is retransmitted, it is no longer necessary to be initiated to retransmit by upstream end, be simplified workflow, control upstream end
The expense of data transmission is carried out between downstream.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is shown in the related technology, handles the basic sequential map flow chart of IN type transactions；
The basic flow chart of the working method of the USB adapter provided Fig. 2 shows the embodiment of the present invention；
Fig. 3 shows the sequential flow chart of the first workflow of the USB adapter that the embodiment of the present invention is provided；
Fig. 4 shows the sequential flow chart of second of workflow of the USB adapter that the embodiment of the present invention is provided；
Fig. 5 shows the sequential flow chart institute of second of workflow of the USB adapter that the embodiment of the present invention is provided
Corresponding system architecture diagram；
Fig. 6 shows the USB data transmission schematic device that the embodiment of the present invention is provided.
Specific implementation mode
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
In the related technology, there is USB data transmission, USB data transmission has been carried out according to USB data transmission type
If classification, two classes can be divided into, be IN type transactions and OUT type transactions respectively.
The flow direction that IN type transactions are primarily referred to as data packet (DATA) current transmission is by USB-Device (USB from equipment)
It is directed toward the data transmission procedure of USB-Host (USB main equipment), is equivalent to and initiates to ask by USB-Host, and clear usb data
Transmission direction be by USB from equipment to USB main equipment.
The flow direction that OUT type transactions are primarily referred to as data packet (DATA) current transmission is to be directed toward USB- by USB-Host
The data exchange process of Device is equivalent to and initiates to ask by USB-Host, and the transmission direction of clear usb data is by USB
Main equipment is to USB from equipment.
IN/OUT affairs are only used for the flow direction of notification data transmission, in practical implementation, the content of specific data transmission
It is determined by upper-layer protocol.
As shown in Figure 1, showing in the related technology, the basic sequential map flow chart of IN type transactions is handled, is specifically included
Following steps：
Step 1, USB main equipment (USB Host) by the IN transactions requests of generation to main equipment adapter (USB Host
Adaptor it) sends；
Step 2, the IN transactions requests that USB main equipment is sent out are transmitted to from device adapter (USB by main equipment adapter
Device Adaptor)；
Step 3, USB is transmitted to from equipment from device adapter by the IN transactions requests that main equipment adapter is sent out；
Step 4, USB sends feedback data from equipment (USB Device) according to IN transactions requests to from device adapter
It wraps (DATA)；From device adapter after receiving feedback data packet, parallel execution of steps 5 and step 6；
Step 5, from device adapter to USB from equipment feeding back ACK response receipt, to be informed from equipment to USB from equipment
Adapter is successfully received feedback data packet；
Step 6, feedback data packet is sent from device adapter to main equipment adapter；Main equipment adapter is receiving instead
Parallel execution of steps 7 and 8 after feedback data packet；
Step 7, main equipment adapter is to from device adapter feeding back ACK response receipt, to be informed to from device adapter
Main equipment adapter is successfully received feedback data packet；
Step 8, main equipment adapter sends feedback data packet to USB main equipment.
IN type transactions are completed by above-mentioned 8 steps, wherein step 5 and 6 is to execute parallel, and step 7 and 8 is simultaneously
Row executes.
The above process has reacted ideally, the processing procedure of IN type transactions, but in fact, USB is connecing from equipment
When receiving IN transactions requests, benefit may be not yet ready for and manage the transactions requests, at this point, step 4 can then be changed to USB from equipment
NAK response receipts are fed back to from device adapter, to indicate that USB is not yet ready for quite from equipment into feedback data packet.At this point, phase
In the technology of pass current process (no longer executing step 5 and subsequent step) will be terminated from device adapter.In order to improve this place
Reason mode would generally establish the retransmission mechanism at main equipment end in the related technology, it is, if USB main equipment is having issued IN
If being not received by feedback data packet in a period of time of (step 1) after transactions requests, then it can re-initiate an affairs and ask
It asks and (re-executes step 1) and carry out error correction, to complete IN type transactions according to above-mentioned flow.Either exist from device adapter
After receiving the NAK response receipts that USB is fed back from equipment, also NAK can be sent to USB main equipment by main equipment adapter and answered
Receipt is answered, so that USB main equipment re-initiates a transactions requests and (step 1) re-executed, to be completed according to above-mentioned flow
IN type transactions.
But present inventor has found that this processing mode is simultaneously unreasonable, if mainly re-executing step 1, then can
Increase main equipment adapter and (is embodied in step 2), this leads to main equipment adapter from the interaction between device adapter
And more occupied from the bandwidth resources between device adapter, moreover, in some cases, upstream end or downstream would generally
Usb data interaction is carried out with multiple opposite ends (other downstreams or other upstream ends) simultaneously, is re-initiated in this way by USB main equipment
Transactions requests then can bigger occupy the bandwidth resources of upstream end or downstream, and then further tie down upstream end or downstream
Performance.
For this kind of situation, this application provides a kind of USB data transmission method of improvement, the transmission method, this method
The slave device adapter in downstream-end device is acted on, downstream-end device includes from device adapter and USB from equipment, from equipment
Adapter and USB are electrically connected from equipment, as shown in Fig. 2, this method comprises the following steps：
S101 receives the processing transactions requests that upstream end is sent out from device adapter；It includes IN things to handle transactions requests
Business request or OUT transaction request；
S102 will handle transactions requests from device adapter and be sent to USB from equipment；
S103 is stored in corresponding target storage, the target storage from device adapter by transactions requests are handled
In downstream-end device；
S104, if the NAK response receipts that USB is generated from equipment are received from device adapter, from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
In step S101, send out processing transactions requests is typically the main equipment adapter in upstream end, under the conditions of certain,
Send out processing transactions requests can also be the other unit in upstream end.Generate processing transactions requests is typically in upstream end
USB main equipment, under the conditions of certain, under the conditions of certain, generate processing transactions requests can also be other lists in upstream end
Position.
The unit (such as main equipment adapter) for sending out processing transactions requests, may be used wired or wireless way with from equipment
Adapter is attached, and wired finger is in such a way that the transmission cables such as optical fiber, twisted-pair feeder are attached.
In step S102 and S103, two actions of parallel execution are needed from device adapter, are that will handle affairs respectively
It asks (the processing transactions requests that upstream end is sent out) to be sent to USB from equipment, and processing transactions requests is stored in correspondence
Target storage.The context of this step S102 and S103 are not limited in scheme provided herein, the two are dynamic
Work can execute (any of the two actions can first carry out, and can also be that two actions are performed simultaneously) parallel.Or
Person says that the condition that triggering S102 and S103 is executed all is that step S101 is finished.
It is that IN transactions requests (IN Transaction) and OUT transaction are asked respectively specifically, there are two types of processing transactions requests
It asks (OUT Transaction).
Under normal circumstances, it is to be distributed from device adapter, and then destination adapter is connecing that target storage, which is advance,
It receives after handling transactions requests, so that it may be acted with being done directly preservation.Target storage is located in downstream-end device, refers to
It is the action that can be done directly storage from device adapter, processing transactions requests need not be stored in external memory
(for example need not be sent to third party's storage device by wireless network from device adapter by transactions requests are handled), in this way can be with
Efficiency is improved to a certain extent.
As explanation hereinbefore is sent to from device adapter after receiving processing transactions requests to USB from equipment
Handle transactions requests, and USB from equipment then due to the limitation of its own situation, may generate at least two it is different as a result,
It is to generate correctly to reply message (such as DATA data packets or ACK responses receipt) and NAK response receipts respectively.Wherein, work as processing
When transactions requests are IN transactions requests, DATA data packets are USB responds IN transactions requests from equipment, using from specified memory block
What the data being deployed into were formed, NAK responses receipt can be that USB cannot respond to IN transactions requests from equipment, generate DATA numbers
According to (when USB handles the processing transactions requests from Not ready), one of generation informs receipt temporarily when packet.
When it is OUT transaction request to handle transactions requests, ACK response receipts, which are USB, can respond OUT transaction from equipment and ask
It asks, i.e., DATA data packets corresponding to OUT transaction request (the DATA data packets can carry in OUT transaction request) carry out
It is generated when processing (for example storing the data in DATA data packets), corresponding, NAK response receipts can also be
USB cannot respond to OUT transaction request, i.e. when USB can not be handled DATA data packets from equipment, the one of feedback from equipment
It is a to inform receipt temporarily.
No matter which kind of state USB is in from equipment, corresponding response receipt can be all fed back to from device adapter.If from
Device adapter receives the NAK responses receipt (the response receipt about processing transactions requests) that USB is fed back from equipment, then walks
In rapid S104, processing transactions requests are transferred from device adapter from target storage, it is, in step S104, it is suitable from equipment
Orchestration is that the processing transactions requests that will be preserved in step S103 take out.After being deployed into processing transactions requests, from equipment
Adapter just sends the processing transactions requests to USB from equipment again, so that USB responds the processing affairs being deployed into from equipment
Request.
Method provided herein not for another example in traditional scheme, is started by upstream end and retransmits operation, but by downstream
In slave device adapter start and retransmit operation, in this way, just alleviate the data interaction frequency between upstream end and downstream, save
About bandwidth between the two.
In fact, the content of the processing transactions requests sent in step S102 and step S104 is all identical.Step
After S104 is finished, it is also possible that the NAK response receipts that USB is sent out from equipment are received, at this point, should hold again
Row step S104.It is, if USB returns to always NAK response receipts from equipment, step can be triggered every time
S104。
Embodiment as an optimization can be the weight that processing transactions requests are carried out by the way of controlling recurrence frequency
Hair, so that in different situations using corresponding processing strategy.The mode of six kinds of repeating transmission is provided below：
The first, step S104 is executed as follows：
From device adapter after receiving the NAK response receipts that USB is generated from equipment, the first timing is proceeded by,
And when the first timing reaches preset first threshold, processing transactions requests are transferred from device adapter from target storage, and
The processing transactions requests being deployed into are sent to USB from equipment.
Preferably, the time span of the first timing and the number for receiving the NAK response receipts about processing transactions requests
Being proportionate property.The number for namely receiving NAK response receipts is more, and the time span of the first timing is longer.
Second, alternatively scheme can also be optimized, for example, step S104 is held as follows
Row：
When the second timing reaches preset second threshold, and USB has been received from device adapter and is generated from equipment
NAK response receipts when, then transfer processing transactions requests from device adapter from target storage, and send to USB from equipment
The processing transactions requests being deployed into；Second timing is when sending processing transactions requests to USB from equipment from device adapter
It proceeds by.
Preferably, the time span of the second timing and the number for receiving the NAK response receipts about processing transactions requests
Being proportionate property.The number for namely receiving NAK response receipts is read, and the time span of the second timing is longer.
The third, can also alternatively optimize scheme, for example, step S104 is held as follows
Row：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then at once from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
4th kind, alternatively scheme can also be optimized, for example, step S104 is held as follows
Row：
When third timing reaches preset third threshold value, and USB is not received from device adapter and is generated just from equipment
When really replying message, then processing transactions requests are transferred from device adapter from target storage, and transfer to USB from equipment transmission
The processing transactions requests arrived；Third timing be from device adapter will handle transactions requests to USB since when equipment is sent
It carries out.
Preferably, the time span of third timing and the number for receiving the NAK response receipts about processing transactions requests
Being proportionate property.The number for namely receiving NAK response receipts is read, and the time span of third timing is longer.
5th kind, alternatively scheme can also be optimized, for example, step S104 is held as follows
Row：
When the 4th timing reaches preset 4th threshold value, and USB is not received from device adapter and is generated just from equipment
When really replying message, then PING instructions are sent from device adapter to USB from equipment；If receive USB from equipment return about
The reply of PING instructions then transfers processing transactions requests from device adapter from target storage, and sends and adjust to USB from equipment
The processing transactions requests got；4th timing be from device adapter will handle transactions requests sent to USB from equipment when open
What the beginning carried out.If not receiving USB returns to the reply instructed about PING from equipment, current process is terminated.
Preferably, the time span of the 4th timing and the number for receiving the NAK response receipts about processing transactions requests
Being proportionate property.The number for namely receiving NAK response receipts is read, and the time span of the 4th timing is longer.
6th kind, alternatively scheme can also be optimized, for example, step S104 is held as follows
Row：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then from device adapter to
USB sends PING instructions from equipment；If receiving USB returns to the reply instructed about PING from equipment, from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
Above-mentioned six kinds of realization methods can be configured according to the difference of particular condition in use.Wherein, first threshold, second
The magnitude relationship of threshold value and third threshold value does not need to limit, as preferred realization method, first threshold, second threshold,
The numerical value of three threshold values and the 4th threshold value, which is both preferably, is more than 1 millisecond, and the numerical value less than 20 milliseconds.
PING instructions be for verifying USB from the whether online instruction of equipment, if USB is online from equipment,
Then USB can receive PING instructions from equipment and be replied message backward from device adapter, to illustrate USB from equipment
It is online.
Under certain realization method, method provided herein can also disclosed in above-mentioned steps S101-S103 scheme
On the basis of, still use traditional retransmission mechanism, i.e., after receiving the processing transactions requests that upstream end is newly sent out according to
The mode of S101-S104 executes step S101-S103 using the processing transactions requests newly sent out.
On the basis of above-mentioned six kinds of modes, following steps can also be increased in step S104：
If after the NAK response receipts that device adapter receives that USB is generated from equipment, judgement receives NAK responses
Whether the number of receipt is more than predetermined threshold, if not, according to the corresponding behaviour of any execution in above-mentioned the first-the six kind
Make.
Such as explanation hereinbefore, USB, then due to the limitation of its own situation, may generate at least two differences from equipment
As a result, in addition to generate correctly reply message with NAK response receipts other than, it is also possible to STALL data packets can be generated, to indicate USB
It is in suspended state from equipment or does not support the request, then should upstream hold the corresponding nothing of feedback from device adapter at this time
The message of method processing.That is, method provided herein further includes：
If receive that USB sent out from equipment from device adapter does not support data packet, upstream end feedback USB from
Equipment does not support the message handled.
In the following, illustrating the working method of USB adapter provided herein with 2 specific examples.
Example 1, as shown in figure 3, show send IN transactions requests when detailed process, the flow act on upstream end and
The usb data interactive system that downstream is formed, upstream end include USB main equipment and main equipment adapter, and downstream includes USB
From equipment and from device adapter, which includes the following steps：
Step 1, USB main equipment sends the IN transactions requests of generation to main equipment adapter；It is carried in IN transactions requests
There are IN Token (IN tokens)；
Step 2, the IN transactions requests that USB main equipment is sent out are transmitted to from device adapter by main equipment adapter, with
Make to receive IN transactions requests from device adapter；
Step 3, it is sent to USB from equipment from device adapter by IN transactions requests；
Step 4, corresponding target storage, the target storage position are stored in from device adapter by IN transactions requests
In downstream-end device；
Step 5, USB is after equipment receives IN transactions requests, and judgement can not currently handle the IN transactions requests, at this time
USB generates NAK response receipts from equipment；
Step 6, USB sends NAK response receipts to from device adapter from equipment；
Step 7, IN things are transferred from target storage after the NAK response receipts in receiving step 6 from device adapter
Business request；
Step 8, it is sent to USB from equipment from device adapter by the IN transactions requests being deployed into step 7；
Step 9, after equipment receives the IN transactions requests in step 8, judgement can currently handle the IN affairs asks USB
It asks, and returns to DATA data packets；
Step 10, USB sends the DATA data packets in step 9 to from device adapter from equipment, so that suitable from equipment
Orchestration receives DATA data packets；
Step 11, from device adapter to USB from equipment feeding back ACK response receipt, to be informed from equipment to USB from equipment
DATA data packets have been received in adapter；
Step 12, it is sent to main equipment adapter from device adapter by DATA data packets, so that main equipment adapter connects
Receive DATA data packets；
Step 13, main equipment adapter is to from device adapter feeding back ACK response receipt, to be informed to from device adapter
DATA data packets have been received in main equipment adapter；
Step 14, main equipment adapter sends DATA data packets to USB main equipment；Step 15, USB main equipment receives
To main equipment adapter feeding back ACK response receipt after DATA data packets, to complete whole flows.
Wherein, step 3 and step 4 are all triggered by step 2, and there is no absolute priorities between step 3 and step 4
Sequentially.Similar, step 11 and step 12 are all triggered by step 10, and there is no absolute between step 11 and step 12
Sequencing.Similar, step 13 and step 14 are all triggered by step 12, and there is no absolutely between step 13 and step 14
To sequencing.
Specifically, IN transactions requests, which can be request, carries out long-range transparent transmission video, audio or other any user's needs
Data request.
Example 2, as shown in figure 4, showing detailed process when sending OUT transaction request, which acts on such as Fig. 5 institutes
The system architecture shown, the system architecture include：Upstream end, middle control end (being equivalent to downstream) and connector.Upstream end includes PC
(each PC is equivalent to USB main equipment), KVM signal sending ends (being equivalent to main equipment adapter) are held, connector is KVM signals
Switching matrix (be equivalent to establish signal mapping channel between KVM signal sending ends and KVM signal receiving ends signal switching set
It is standby), downstream include KVM signal receiving ends (being equivalent to from device adapter), USB storage device (being equivalent to USB from equipment),
Display array and HID human-computer interaction devices (such as keyboard, mouse) flow include the following steps：
Step 1, the OUT transaction of generation is asked to send to main equipment adapter by USB main equipment；It is taken in OUT transaction request
With OUT Token (OUT tokens) and DATA data packets；
Step 2, the request of OUT transaction that USB main equipment is sent out is transmitted to from device adapter by main equipment adapter, with
Make to receive OUT transaction request from device adapter；
Step 3, it asks to send to USB from equipment from device adapter by OUT transaction；
Step 4, corresponding target storage, the target storage are stored in from device adapter by OUT transaction request
In downstream-end device；
Step 5, USB is after equipment receives OUT transaction request, and judgement can not currently handle OUT transaction request, at this time
USB generates NAK response receipts from equipment；
Step 6, USB sends NAK response receipts to from device adapter from equipment；
Step 7, from device adapter after the NAK response receipts in receiving step 6 OUT is transferred from target storage
Transactions requests；
Step 8, it asks to send to USB from equipment from device adapter by the OUT transaction being deployed into step 7；
Step 9, for USB after equipment receives the request of the OUT transaction in step 8, judgement can currently handle the OUT transaction
Request, and the DATA data packets in OUT transaction request are stored in the memory block of downstream-end device, and feeding back ACK response
Receipt；
Step 10, USB sends the ACK response receipts in step 9 to from device adapter from equipment, so that suitable from equipment
Orchestration receives ACK response receipts；
Step 11, it from device adapter after the ACK response receipts in receiving step 10, is fed back to main equipment adapter
ACK response receipts；
Step 12, main equipment adapter is after receiving the ACK response receipts sent out from device adapter, to USB master
Equipment feeding back ACK response receipt.
Wherein, step 3 and step 4 are all triggered by step 2, and there is no absolute priorities between step 3 and step 4
Sequentially.
Usual PC be after receiving mouse control command (key mouse control command can be that selection needs the content transmitted),
Above-mentioned OUT transaction flow is executed again.Applied to above system, user can be sent out by operating HID device to long-range specified PC
It makes a gift to someone machine interactive instruction, PC responds the request of human-computer interaction order, corresponding OUT transaction is executed, to realize that PC and USB storages are set
Usb data orientation transparent transmission (i.e. PC sends usb data to USB storage device) between standby.
Based on the above method, present invention also provides USB adapters, including：
Receiving module, the processing transactions requests sent out for receiving upstream end；It includes that IN affairs are asked to handle transactions requests
It asks or OUT transaction is asked；
Sending module is sent for that will handle transactions requests to USB from equipment；
Preserving module is stored in corresponding target storage for that will handle transactions requests, and the target storage is located at
In downstream-end device；
Retransmit module, for when receiving the NAK response receipts that USB is generated from equipment from device adapter, then from
Processing transactions requests are transferred in target storage, and the processing transactions requests being deployed into are sent to USB from equipment.
Preferably, module is retransmitted, is further used for after receiving the NAK response receipts that USB is generated from equipment, is started
Carry out the first timing, and when the first timing reaches preset first threshold, transferred from device adapter from target storage from
Transactions requests are managed, and send the processing transactions requests being deployed into USB from equipment；The time span of first timing and receive pass
In the being proportionate property of number of the NAK response receipts of processing transactions requests.
Preferably, module is retransmitted, is further used for reaching preset second threshold when the second timing, and from device adapter
When the NAK response receipts that USB is generated from equipment have been received, then processing thing is transferred from device adapter from target storage
Business request, and the processing transactions requests being deployed into are sent to USB from equipment；Second timing is will to handle thing from device adapter
What business request proceeded by when being sent to USB from equipment；The time span of second timing and receive about processing transactions requests
NAK response receipts being proportionate property of number.
Preferably, module is retransmitted, the NAK that USB is generated from equipment ought be received from device adapter by, which being further used for, answers
When answering receipt, then processing transactions requests are transferred from device adapter from target storage at once, and transfer to USB from equipment transmission
The processing transactions requests arrived.
Preferably, module is retransmitted, is further used for reaching preset third threshold value when third timing, and from device adapter
Do not receive that USB generated from equipment is correct when replying message, then transfers processing affairs from device adapter from target storage
Request, and the processing transactions requests being deployed into are sent to USB from equipment；Third timing is will to handle affairs from device adapter
It asks to proceed by when sending to USB from equipment；It the time span of third timing and receives about processing transactions requests
The being proportionate property of number of NAK response receipts.
Preferably, module is retransmitted, is further used for reaching preset 4th threshold value when the 4th timing, and from device adapter
Do not receive that USB generated from equipment is correct when replying message, then sends PING instructions from device adapter to USB from equipment；
If receiving USB returns to the reply instructed about PING from equipment, processing thing is transferred from device adapter from target storage
Business request, and the processing transactions requests being deployed into are sent to USB from equipment；4th timing is will to handle thing from device adapter
What business request proceeded by when being sent to USB from equipment；The time span of 4th timing and receive about processing transactions requests
NAK response receipts being proportionate property of number.
Preferably, module is retransmitted, the NAK that USB is generated from equipment ought be received from device adapter by, which being further used for, answers
When answering receipt, then PING instructions are sent from device adapter to USB from equipment；If receiving USB to return about PING from equipment
The reply of instruction is then transferred processing transactions requests from device adapter from target storage, and is deployed into USB from equipment transmission
Processing transactions requests.
Corresponding with the above method, present invention also provides a kind of non-volatile program generations that can perform with processor
The computer-readable medium of code, said program code make the processor execute any of the above-described a USB data transmission method.
It is corresponding with the above method, as shown in fig. 6, being filled by the USB data transmission that another embodiment of the application provides
Schematic diagram is set, which includes：Processor 61, memory 62 and bus 63, memory 62 are stored with execution
Instruction, when device is run, is communicated between processor 61 and memory 62 by bus 63, and processor 61 executes in memory 62
The following of storage executes instruction：
The processing transactions requests that upstream end is sent out are received from device adapter；It includes IN transactions requests to handle transactions requests
Or OUT transaction request；
Transactions requests will be handled from device adapter to send to USB from equipment；
It is stored in corresponding target storage from device adapter by transactions requests are handled, under the target storage is located at
It swims in end equipment；
If receiving the NAK response receipts that USB is generated from equipment from device adapter, from device adapter from target
Processing transactions requests are transferred in memory block, and the processing transactions requests being deployed into are sent to USB from equipment.
Processor 61 is specifically used for：
If step receives the NAK response receipts that USB is generated from equipment from device adapter, from device adapter from
Processing transactions requests are transferred in target storage, and send the processing transactions requests being deployed into from equipment to USB and include：
From device adapter after receiving the NAK response receipts that USB is generated from equipment, the first timing is proceeded by,
And when the first timing reaches preset first threshold, processing transactions requests are transferred from device adapter from target storage, and
The processing transactions requests being deployed into are sent to USB from equipment；The time span of first timing with receive about processing affairs ask
The being proportionate property of number for the NAK response receipts asked.
Or, if step receives the NAK response receipts that USB is generated from equipment from device adapter, it is adapted to from equipment
Device transfers processing transactions requests from target storage, and sends the processing transactions requests being deployed into from equipment to USB and include：
When the second timing reaches preset second threshold, and USB has been received from device adapter and is generated from equipment
NAK response receipts when, then transfer processing transactions requests from device adapter from target storage, and send to USB from equipment
The processing transactions requests being deployed into；Second timing is when sending processing transactions requests to USB from equipment from device adapter
It proceeds by；The time span of second timing and the number about the NAK response receipts of processing transactions requests is received in just
Correlation.
Or, if step receives the NAK response receipts that USB is generated from equipment from device adapter, it is adapted to from equipment
Device transfers processing transactions requests from target storage, and sends the processing transactions requests being deployed into from equipment to USB and include：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then at once from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
Or, if step receives the NAK response receipts that USB is generated from equipment from device adapter, it is adapted to from equipment
Device transfers processing transactions requests from target storage, and sends the processing transactions requests being deployed into from equipment to USB and include：
When third timing reaches preset third threshold value, and USB is not received from device adapter and is generated just from equipment
When really replying message, then processing transactions requests are transferred from device adapter from target storage, and transfer to USB from equipment transmission
The processing transactions requests arrived；Third timing be from device adapter will handle transactions requests to USB since when equipment is sent
It carries out；The time span of third timing is proportionate about the number of NAK response receipts of processing transactions requests with receiving
Property.
Or, if step receives the NAK response receipts that USB is generated from equipment from device adapter, it is adapted to from equipment
Device transfers processing transactions requests from target storage, and sends the processing transactions requests being deployed into from equipment to USB and include：
When the 4th timing reaches preset 4th threshold value, and USB is not received from device adapter and is generated just from equipment
When really replying message, then PING instructions are sent from device adapter to USB from equipment；If receive USB from equipment return about
The reply of PING instructions then transfers processing transactions requests from device adapter from target storage, and sends and adjust to USB from equipment
The processing transactions requests got；4th timing be from device adapter will handle transactions requests sent to USB from equipment when open
What the beginning carried out；The time span of 4th timing and receive about processing transactions requests NAK response receipts number be in positive
Guan Xing.
Or, if step receives the NAK response receipts that USB is generated from equipment from device adapter, it is adapted to from equipment
Device transfers processing transactions requests from target storage, and sends the processing transactions requests being deployed into from equipment to USB and include：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then from device adapter to
USB sends PING instructions from equipment；If receiving USB returns to the reply instructed about PING from equipment, from device adapter
Processing transactions requests are transferred from target storage, and send the processing transactions requests being deployed into USB from equipment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1.USB data transmission methods, which is characterized in that including：
The processing transactions requests that upstream end is sent out are received from device adapter；Processing transactions requests include IN transactions requests or
OUT transaction is asked；
Transactions requests will be handled from device adapter to send to USB from equipment；
It is stored in corresponding target storage from device adapter by transactions requests are handled, the target storage is located at downstream
In equipment；
If receiving the NAK response receipts that USB is generated from equipment from device adapter, stored from device adapter from target
Area transfers processing transactions requests, and the processing transactions requests being deployed into are sent to USB from equipment.
2. according to the method described in claim 1, it is characterized in that, if step receives USB from equipment institute from device adapter
The NAK response receipts of generation are then transferred processing transactions requests from device adapter from target storage, and are sent out to USB from equipment
The processing transactions requests being deployed into are sent to include：
From device adapter after receiving the NAK response receipts that USB is generated from equipment, the first timing is proceeded by, and work as
When first timing reaches preset first threshold, processing transactions requests are transferred from device adapter from target storage, and to USB
The processing transactions requests being deployed into are sent from equipment；It the time span of first timing and receives about processing transactions requests
The being proportionate property of number of NAK response receipts.
3. according to the method described in claim 1, it is characterized in that, if step receives USB from equipment institute from device adapter
The NAK response receipts of generation are then transferred processing transactions requests from device adapter from target storage, and are sent out to USB from equipment
The processing transactions requests being deployed into are sent to include：
When the second timing reaches preset second threshold, and the NAK that USB is generated from equipment has been received from device adapter
When response receipt, then processing transactions requests are transferred from device adapter from target storage, and be deployed into USB from equipment transmission
Processing transactions requests；Second timing be from device adapter will handle transactions requests to USB since when equipment is sent into
Capable；The time span of second timing and the being proportionate property of number for receiving the NAK response receipts about processing transactions requests.
4. according to the method described in claim 1, it is characterized in that, if step receives USB from equipment institute from device adapter
The NAK response receipts of generation are then transferred processing transactions requests from device adapter from target storage, and are sent out to USB from equipment
The processing transactions requests being deployed into are sent to include：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then at once from device adapter from mesh
Processing transactions requests are transferred in mark memory block, and the processing transactions requests being deployed into are sent to USB from equipment.
5. according to the method described in claim 1, it is characterized in that, if step receives USB from equipment institute from device adapter
The NAK response receipts of generation are then transferred processing transactions requests from device adapter from target storage, and are sent out to USB from equipment
The processing transactions requests being deployed into are sent to include：
When third timing reaches preset third threshold value, and do not receive from device adapter that USB generated from equipment correct returns
When multiple message, then processing transactions requests are transferred from device adapter from target storage, and be deployed into USB from equipment transmission
Handle transactions requests；Third timing be from device adapter will handle transactions requests sent to USB from equipment when proceed by
's；The time span of third timing and the being proportionate property of number for receiving the NAK response receipts about processing transactions requests.
6. according to the method described in claim 1, it is characterized in that, if step receives USB from equipment institute from device adapter
The NAK response receipts of generation are then transferred processing transactions requests from device adapter from target storage, and are sent out to USB from equipment
The processing transactions requests being deployed into are sent to include：
When the 4th timing reaches preset 4th threshold value, and do not receive from device adapter that USB generated from equipment correct returns
When multiple message, then PING instructions are sent from device adapter to USB from equipment；If receiving USB to return about PING from equipment
The reply of instruction is then transferred processing transactions requests from device adapter from target storage, and is deployed into USB from equipment transmission
Processing transactions requests；4th timing be from device adapter will handle transactions requests to USB since when equipment is sent into
Capable；The time span of 4th timing and the being proportionate property of number for receiving the NAK response receipts about processing transactions requests.
7. according to the method described in claim 1, it is characterized in that, if step receives USB from equipment institute from device adapter
The NAK response receipts of generation are then transferred processing transactions requests from device adapter from target storage, and are sent out to USB from equipment
The processing transactions requests being deployed into are sent to include：
When receiving the NAK response receipts that USB is generated from equipment from device adapter, then from device adapter to USB from
Equipment sends PING instructions；If receive USB returns to the reply that is instructed about PING from equipment, from device adapter from target
Processing transactions requests are transferred in memory block, and the processing transactions requests being deployed into are sent to USB from equipment.
8.USB adapters, which is characterized in that including：
Receiving module, the processing transactions requests sent out for receiving upstream end；Processing transactions requests include IN transactions requests or
OUT transaction is asked；
Sending module is sent for that will handle transactions requests to USB from equipment；
Preserving module is stored in corresponding target storage for that will handle transactions requests, and the target storage is located at downstream
In end equipment；
Module is retransmitted, for when receiving the NAK response receipts that USB is generated from equipment from device adapter, then from target
Processing transactions requests are transferred in memory block, and the processing transactions requests being deployed into are sent to USB from equipment.
9. a kind of computer-readable medium for the non-volatile program code that can perform with processor, which is characterized in that described
Program code makes the processor execute described any the methods of claim 1-7.
10.USB data transmission devices, which is characterized in that the USB data transmission device includes：Processor, memory and bus,
Memory, which is stored with, to be executed instruction, and when the apparatus is operative, is executed by bus communication, processor between processor and memory
The instruction as corresponding to any one of claim 1-7 methods stored in memory.
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| CN201810191669.1A CN108366129B (en) | 2018-03-08 | 2018-03-08 | USB data transmission method, device and USB are from device adapter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810191669.1A CN108366129B (en) | 2018-03-08 | 2018-03-08 | USB data transmission method, device and USB are from device adapter |
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| CN112533083A (en) * | 2020-12-01 | 2021-03-19 | 威创集团股份有限公司 | USB optical fiber exchange box and system |
| CN114244485A (en) * | 2021-12-03 | 2022-03-25 | 威创集团股份有限公司 | Data management method for USB signal long-distance transmission |
| CN114338707A (en) * | 2021-12-03 | 2022-04-12 | 威创集团股份有限公司 | Data management method and related device for USB signal transparent transmission multiple devices |
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| Publication number | Publication date |
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| CN108366129B (en) | 2019-05-07 |
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