CN108038071A - Vehicle-mounted system USB extension method and vehicle-mounted system - Google Patents
Vehicle-mounted system USB extension method and vehicle-mounted system Download PDFInfo
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- CN108038071A CN108038071A CN201711397908.0A CN201711397908A CN108038071A CN 108038071 A CN108038071 A CN 108038071A CN 201711397908 A CN201711397908 A CN 201711397908A CN 108038071 A CN108038071 A CN 108038071A
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- onboard system
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- parameter information
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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
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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
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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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
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses an expansion method of a vehicle-mounted system USB and the vehicle-mounted system, wherein the expansion method of the vehicle-mounted system USB comprises the following steps: acquiring parameter information corresponding to each first node of a first HUB directly connected with a USB (universal serial bus) of a vehicle-mounted system; matching each first channel path connected with the vehicle-mounted system for each first node according to the parameter information corresponding to each first node; and accessing the first external equipment of the first node corresponding to the first channel path according to the first channel path. According to the invention, different parameter information is distributed to each node of the first HUB, so that each node of the first HUB is used as an independent USB OTG, and the channel paths for connecting the vehicle-mounted system are allocated for each independent USB OTG, so that the original vehicle-mounted system USB is expanded into a plurality of independent USB OTGs, and the comprehensive development requirement of the vehicle-mounted system is met.
Description
Technical field
The present invention relates to onboard system, the extended method and onboard system of onboard system USB are especially related to.
Background technology
With the development of modern automobile industry and electronic technology, automobile navigation, communication, multimedia video amusement, etc. electronics
System can network to form powerful comprehensive onboard system by network technology.Following onboard system is towards integrated
Change, the intelligent, direction of all-graphic information platform is developed.Onboard system can not only provide navigation feature, but also onboard system
Also there is multimedia video amusement function, satellite digital broadcasting reception can be carried out, vehicle-mounted digital television receives, CD/DVD is played
Deng more rich application selection being provided to the user, to meet requirement of the user to car entertainment, comfort.Existing Android
The OTG of system only supports a USB, and a USB does not meet the comprehensive growth requirement of onboard system on onboard system, it is impossible to
Meet the use demand of user.
Therefore, the prior art could be improved.
The content of the invention
The main object of the present invention is a kind of extended method of onboard system USB of offer, it is intended to solves existing onboard system
Only support a USB device, do not meet the technical problem of the comprehensive growth requirement of onboard system.
The present invention proposes a kind of extended method of onboard system USB, including：
Obtain parameter information corresponding with each first node for the first HUB that onboard system USB is directly connected to；
It is respectively each above-mentioned first node matching and vehicle-mounted system according to the corresponding above-mentioned parameter information of each first node
Each first passage path of system connection；
According to the first external equipment accessed on the first node of above-mentioned first passage path access corresponding thereto.
Preferably, above-mentioned first external equipment is the 2nd HUB, it is above-mentioned according to above-mentioned first passage path access corresponding thereto
After the step of the first external equipment accessed on the first node answered, including：
Identify the equipment number of above-mentioned 2nd HUB；
Judge whether the parameter information to match with the said equipment number；
If in the presence of obtaining the corresponding above-mentioned parameter information of each section point of above-mentioned 2nd HUB；
It is respectively each above-mentioned section point matching and vehicle-mounted system according to the corresponding above-mentioned parameter information of each section point
The different second channel paths of system connection；
According to the second external equipment accessed on the section point of above-mentioned second channel path access corresponding thereto.
Preferably, above-mentioned the step of judging whether the parameter information to match with the said equipment number, including：
Whether analysis inquires the parameter to match with the equipment number of above-mentioned 2nd HUB in preset data matching list is believed
Breath；
If inquiring, judge there is the parameter information to match with the equipment number of above-mentioned 2nd HUB；
If not inquiring, judge the parameter information to match with the equipment number of the 2nd HUB is not present.
Preferably, it is above-mentioned according to outside accessed on above-mentioned second channel path access section point corresponding thereto second
Before the step of connecing equipment, including：
According to the quantity of the equipment number of above-mentioned 2nd HUB and above-mentioned 2nd HUB, calculating is connected with above-mentioned first HUB
Onboard system USB magnitude of voltage and/or current value；
Judge whether above-mentioned magnitude of voltage and/or current value exceed threshold value；
If so, then stop accessing above-mentioned second external equipment.
Preferably, above-mentioned acquisition and each first node of above-mentioned onboard system USB the first HUB being directly connected to are corresponding respectively
Parameter information the step of before, including：
Distribute each first node corresponding parameter letter according to the unit type of above-mentioned first HUB and the quantity of first node
Breath；
By the chip built in the corresponding above-mentioned parameter information write-in onboard system of each first node.
Present invention also offers a kind of onboard system, including：
First acquisition module, it is right respectively with each first node of onboard system USB the first HUB being directly connected to for obtaining
The parameter information answered；
First matching module, for being respectively each above-mentioned first according to the corresponding above-mentioned parameter information of each first node
Each first passage path that node matching is connected with onboard system；
First access modules, for according to accessing on above-mentioned first passage path access first node corresponding thereto
First external equipment.
Preferably, above-mentioned first external equipment is the 2nd HUB, above-mentioned onboard system, including：
Identification module, for identifying the equipment number of above-mentioned 2nd HUB；
First judgment module, for the parameter information for judging whether to match with the said equipment number；
Second acquisition module, if in the presence of obtaining the corresponding above-mentioned ginseng of each section point of above-mentioned 2nd HUB
Number information；
Second matching module, for being respectively each above-mentioned second according to the corresponding above-mentioned parameter information of each section point
The different second channel paths that node matching is connected from onboard system；
Second access modules, for according to accessing on above-mentioned second channel path access section point corresponding thereto
Second external equipment.
Preferably, above-mentioned first judgment module, including：
Analytic unit, for analyzing the equipment number whether inquired in preset data matching list with above-mentioned 2nd HUB
The parameter information to match；
First identifying unit, if for inquiring, judges there is the ginseng to match with the equipment number of above-mentioned 2nd HUB
Number information；
Second identifying unit, if for not inquiring, judges that there is no the equipment number with above-mentioned 2nd HUB to match
Parameter information.Preferably, above-mentioned onboard system, including：
Computing module, for the equipment number and the quantity of above-mentioned 2nd HUB according to above-mentioned 2nd HUB, calculate with it is upper
State the magnitude of voltage and/or current value for the onboard system USB that the first HUB is connected；
Second judgment module, for judging whether above-mentioned magnitude of voltage and/or current value exceed threshold value；
Stopping modular, for if so, then stopping accessing above-mentioned second external equipment.
Preferably, above-mentioned onboard system, including：
Distribution module, each first segment is distributed for the unit type according to above-mentioned first HUB and the quantity of first node
The corresponding parameter information of point；
Writing module, for writing the corresponding above-mentioned parameter information of each first node to the chip built in onboard system
On.
Advantageous effects of the present invention：The present invention by the built-in chip type of the first HUB being connected with onboard system USB in
On onboard system mainboard, and different parameter informations is distributed for each node of the first HUB, make each node of the first HUB as single
Only USB OTG, and be the channel path of the respective connection onboard system of each individually USB OTG matchings, onboard system can distinguish
Each node of first HUB so that former one usb expansion of onboard system is multiple individually USB OTG, to meet onboard system
Comprehensive growth requirement, meets the use demand of user.Moreover, the present invention can connect second on each node of the first HUB
HUB, to further expand the USB of onboard system on the basis of the first HUB.
Brief description of the drawings
The extended method flow diagram of the onboard system USB of Fig. 1 one embodiment of the invention；
The extended method flow diagram of the onboard system USB of Fig. 2 another embodiment of the present invention；
The structure diagram of the onboard system of Fig. 3 one embodiment of the invention；
The structure diagram of the onboard system of Fig. 4 another embodiment of the present invention；
The structure diagram of first judgment module of Fig. 5 another embodiment of the present invention；
The optimization structure diagram of the onboard system of Fig. 6 another embodiment of the present invention；
The optimization structure diagram of the onboard system of Fig. 7 one embodiment of the invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Reference Fig. 1, the extended method of the onboard system USB of one embodiment of the invention, including：
S1：Obtain parameter information corresponding with each first node for the first HUB that onboard system USB is directly connected to.
It is multiple to refer to that one kind can expand to a USB interface by HUB in the present embodiment, and these interfaces can be made same
When the device that uses.This step by increasing the HUB chips of the first HUB being directly connected to onboard system USB on hardware,
HUB chip informations specific to the first HUB the corresponding parameter information of each node, so that onboard system can independently identify difference
Corresponding parameter information, single USB OTG (USB ON THE GO, usb data are identified as by each first node of the first HUB
Connection), it is the stand-alone interface node identical with each first node quantity by former onboard system usb expansion.Citing ground, the first HUB
There are four nodes, be then four independent USB OTG by former onboard system usb expansion：USB OTG1、USB OTG2、USB
OTG3 and USB OTG4, to meet the comprehensive growth requirement of onboard system, meet the use demand of user.
S2：According to the corresponding above-mentioned parameter information of each first node be respectively each above-mentioned first node matching with it is vehicle-mounted
Each first passage path of system connection.
This step makes onboard system by matching each first passage path being adapted with the parameter information of each first node
It can distinguish each node of the first HUB.Citing ground：The path of onboard system USB is：auto/USB1；By with onboard system USB
The first HUB with four nodes is directly connected to, the first passage path of each first node corresponds to respectively：auto/USB1/1-
1、auto/USB1/1-2、auto/USB1/1-3、auto/USB1/1-4。
S3：According to the first external equipment accessed on the first node of above-mentioned first passage path access corresponding thereto.
In this step, first passage path corresponding from each first node for independently, different, access different the
The external equipment of one node can individually access onboard system by different first passage paths, not interfere with each other.
With reference to Fig. 2, the extended method of the onboard system USB of another embodiment of the present invention, above-mentioned first external equipment is the
After two HUB, step S3, including：
S4：Identify the equipment number of above-mentioned 2nd HUB.
By connecting the 2nd HUB on each node of the first HUB in the present embodiment, multistage expansion is carried out to onboard system USB
Exhibition, the 2nd HUB for presetting designated equipment number are extended, such as：Designated equipment number is USB2.0 etc..
S5：Judge whether the parameter information to match with the said equipment number.
Parameter information by the 2nd HUB for inputting designated equipment number, enables onboard system independently to recognize the 2nd HUB
Each section point.
S6：If in the presence of obtaining the corresponding above-mentioned parameter information of each section point of above-mentioned 2nd HUB.
If by comparative apparatus number, obtain the parameter information of the 2nd presetting HUB, then onboard system can by
With the corresponding parameter information of each section points of the 2nd HUB, the 2nd each section points of HUB are made to be single USB OTG, extension side
Method is the same as the first HUB.Citing ground, the first HUB have four nodes, four nodes are connected on four nodes of each first HUB
The 2nd HUB, be then 16 independent USB OTG by former onboard system usb expansion after extending successfully, if extension is unsuccessful,
Four nodes that former onboard system usb expansion is the first HUB are then distinguished into corresponding four independent USB OTG.
S7：According to the corresponding above-mentioned parameter information of each section point be respectively each above-mentioned section point matching with it is vehicle-mounted
The different second channel paths of system connection.
Citing ground, twoth HUB of the connection with four nodes at the first node of the first HUB, after extending successfully, access
The path of the corresponding each section points of the 2nd HUB of first node is respectively：auto/USB1/1-1/1-1.1*、auto/USB1/
1-1/1-1.2*、auto/USB1/1-1/1-1.3*、auto/USB1/1-1/1-1.4*.If extension is unsuccessful, the 2nd HUB is only
A node can be identified as, the path of corresponding each section point is：auto/USB1/1-1、auto/USB1/1-1、auto/
USB1/1-1, auto/USB1/1-1, four section point same times can only connect one.
S8：According to the second external equipment accessed on the section point of above-mentioned second channel path access corresponding thereto.
Second external equipment of the present embodiment includes USB-HUB or data storage disk etc..If the second external equipment is the 3rd
HUB, and onboard system can recognize that each node of the 3rd HUB, then can continue to be extended the USB of onboard system, by this hair
It is bright to carry out multi-tier to the USB of onboard system.
Further, in another embodiment of the present invention, step S5, including：
S50：Whether analysis inquires the ginseng to match with the equipment number of above-mentioned 2nd HUB in preset data matching list
Number information.
S51：If inquiring, judge there is the parameter information to match with the equipment number of the 2nd HUB.
S52：If not inquiring, judge the parameter information to match with the equipment number of the 2nd HUB is not present.
The Data Matching table of the parameter information of existing all types of HUB equipment is pre-stored in onboard system HUB cores by the present embodiment
On piece, is compared with will pass through the equipment number for the HUB that will be recognized with the equipment number in the Data Matching table to prestore, equipment
Number unanimously then exists, and is otherwise not present.
Further, in another embodiment of the present invention, before step S8, including：
S80：According to the quantity of the equipment number of above-mentioned 2nd HUB and above-mentioned 2nd HUB, calculate and above-mentioned first HUB
The magnitude of voltage and/or current value of connected onboard system USB.
In the present embodiment, when carrying out multi-tier to onboard system USB, the voltage of onboard system USB, electric current are through multistage
Respectively, it is assigned at each end child node, so as to for the USB OTG normal works at each end child node.Car in the present embodiment
The magnitude of voltage and/or current value of loading system USB, changes according to the quantity of the matched independent USB OTG of least significant end.The present invention
For other embodiment to ensure the safety of onboard system locomotive, the magnitude of voltage and/or current value of onboard system USB are a fixed value,
Whether meet that USB OTG are worked normally by the magnitude of voltage and/or current value of the matched independent USB OTG of least significant end, determine
The quantity of the independent USB OTG of extension.
S81：Judge whether above-mentioned magnitude of voltage and/or current value exceed threshold value.
The embodiment of the present invention is ensures the safety of fuselage, to the maximum voltage value and/or electric current at the USB of onboard system
Value, sets restriction threshold value.
S82:If so, then stop accessing above-mentioned second external equipment.
In the present embodiment when there is the second external equipment, maximum voltage value and/or current value at the USB of onboard system surpass
Threshold value has been crossed, then the second external equipment has been accessed by limiting, to ensure the safety of onboard system fuselage.
Further, in one embodiment of the invention, before step S1, including：
S10:Distribute each first node corresponding ginseng according to the unit type of above-mentioned first HUB and the quantity of first node
Number information.
The assigning process of this step is completed by onboard system.After other embodiments of the invention also can be by manual allocation, then
Write chip.
S11：By the chip built in the corresponding above-mentioned parameter information write-in onboard system of each first node.
The first HUB is the first order extension for being built in onboard system in the present embodiment, built-in on the mainboard of onboard system
The chip of first HUB, and each first node for writing on the chip of the first HUB the first HUB matches corresponding parameter information.
Reference Fig. 3, the onboard system of one embodiment of the invention, including：
First acquisition module 1, for obtaining each first node for the first HUB being directly connected to above-mentioned onboard system USB
Corresponding parameter information.
The present embodiment by increasing the HUB chips of the first HUB being directly connected to above-mentioned onboard system USB on hardware,
HUB chip informations specific to the first HUB the corresponding parameter information of each node, so as to onboard system can pass through first obtain
Module 1 is independent to identify corresponding parameter information, and each first node of the first HUB is identified as single USB OTG (USB
ON THE GO, usb data connection), it is the stand-alone interface section identical with each first node quantity by former onboard system usb expansion
Point.Citing ground, the first HUB has four nodes, then is four independent USB OTG by former onboard system usb expansion：USB
OTG1, USB OTG2, USB OTG3 and USB OTG4, to meet the comprehensive growth requirement of onboard system, meet user's
Use demand.
First matching module 2, for being respectively each above-mentioned according to the corresponding above-mentioned parameter information of each first node
Each first passage path that one node matching is connected with onboard system.
Each first passage that the present embodiment is adapted by the parameter information of the matching of the first matching module 2 and each first node
Path, enables onboard system to distinguish each node of the first HUB.Citing ground：The path of onboard system USB is：auto/USB1；It is logical
Cross and be directly connected to the first HUB with four nodes with onboard system USB, the first passage path of each first node is right respectively
It should be：auto/USB1/1-1、auto/USB1/1-2、auto/USB1/1-3、auto/USB1/1-4.
First access modules 3, for being accessed according on above-mentioned first passage path access first node corresponding thereto
The first external equipment.
In the present embodiment, first passage path corresponding from each first node for independently, it is different, access is different
The external equipment of first node can individually access onboard system by different first passage paths, not interfere with each other.
With reference to Fig. 4, above-mentioned first external equipment is the 2nd HUB, the onboard system of another embodiment of the present invention, including：
Identification module 4, for identifying the equipment number of above-mentioned 2nd HUB.
By connecting the 2nd HUB on each node of the first HUB in the present embodiment, multistage expansion is carried out to onboard system USB
Exhibition, the 2nd HUB for presetting designated equipment number are extended, such as：Designated equipment number is USB2.0 etc..
First judgment module 5, for the parameter information for judging whether to match with the said equipment number.
Parameter information by the 2nd HUB for inputting designated equipment number, enables onboard system independently to recognize the 2nd HUB
Each section point.
Second acquisition module 6, if in the presence of each section point for obtaining above-mentioned 2nd HUB is corresponding above-mentioned
Parameter information.
If by 6 comparative apparatus number of the second acquisition module, the parameter information of the 2nd presetting HUB is obtained, then car
Loading system can be by matching the corresponding parameter information of each section points of the 2nd HUB, and it is single to make the 2nd each section points of HUB
USB OTG, extended method is the same as the first HUB.Citing ground, the first HUB have four nodes, distinguish on four nodes of each first HUB
The 2nd HUB of four nodes is connected with, is then 16 independent USB OTG by former onboard system usb expansion after extending successfully,
It is if extension is unsuccessful, corresponding four of four nodes difference that former onboard system usb expansion is the first HUB is independent
USB OTG。
Second matching module 7, for being respectively each above-mentioned according to the corresponding above-mentioned parameter information of each section point
The different second channel paths that two node matchings are connected from onboard system.
Citing ground, twoth HUB of the connection with four nodes at the first node of the first HUB, after extending successfully, access
The path of the corresponding each section points of the 2nd HUB of first node is respectively：auto/USB1/1-1/1-1.1*、auto/USB1/
1-1/1-1.2*、auto/USB1/1-1/1-1.3*、auto/USB1/1-1/1-1.4*.If extension is unsuccessful, the 2nd HUB is only
A node can be identified as, the path of corresponding each section point is：auto/USB1/1-1、auto/USB1/1-1、auto/
USB1/1-1, auto/USB1/1-1, four section point same times can only connect one.
Second access modules 8, for being accessed according on above-mentioned second channel path access section point corresponding thereto
The second external equipment.
Second external equipment of the present embodiment includes USB-HUB or data storage disk etc..If the second external equipment is the 3rd
HUB, and onboard system can recognize that each node of the 3rd HUB, then can continue to be extended the USB of onboard system, by this hair
It is bright to carry out multi-tier to the USB of onboard system.
With reference to Fig. 5, in another embodiment of the present invention, above-mentioned first judgment module 5, including：
Analytic unit 50：For analyzing the device number whether inquired in preset data matching list with above-mentioned 2nd HUB
The parameter information that code matches.
First identifying unit 51：If for inquiring, judge there is what is matched with the equipment number of the 2nd HUB
Parameter information.
Second identifying unit 52：If for not inquiring, judge that there is no the equipment number phase with the 2nd HUB
The parameter information matched somebody with somebody.
The Data Matching table of the parameter information of existing all types of HUB equipment is pre-stored in onboard system HUB cores by the present embodiment
On piece, will pass through analytic unit 50 by the equipment number in the equipment number of the HUB recognized and the Data Matching table to prestore
Compare, equipment number unanimously then judges exist by the first identifying unit 51, is otherwise judged not by the second identifying unit 52
In the presence of.
With reference to Fig. 6, in another embodiment of the present invention, above-mentioned onboard system, including：
Computing module 80, for the equipment number and the quantity of above-mentioned 2nd HUB according to above-mentioned 2nd HUB, calculate with
The magnitude of voltage and/or current value for the onboard system USB that above-mentioned first HUB is connected.
The present embodiment, when carrying out multi-tier to onboard system USB, voltage, the electric current of onboard system USB is equal through multistage
Point, it is assigned at each end child node, so as to for the USB OTG normal works at each end child node.It is vehicle-mounted in the present embodiment
The magnitude of voltage and/or current value of system USB, changes according to the quantity of the matched independent USB OTG of least significant end.The present invention its
His embodiment is the safety of guarantee onboard system locomotive, and the magnitude of voltage and/or current value of onboard system USB are a fixed value, is led to
Cross the magnitude of voltage of the matched independent USB OTG of least significant end and/or whether current value meets that USB OTG are worked normally, determine to expand
The quantity of the independent USB OTG of exhibition.
Second judgment module 81, for judging whether above-mentioned magnitude of voltage and/or current value exceed threshold value.
The embodiment of the present invention is ensures the safety of fuselage, to the maximum voltage value and/or electric current at the USB of onboard system
Value, sets restriction threshold value.
Stopping modular 82, for if so, then stopping accessing above-mentioned second external equipment.
In the present embodiment when there is the second external equipment, maximum voltage value and/or current value at the USB of onboard system surpass
Threshold value has been crossed, then has been limited by stopping modular 82 and accesses the second external equipment, to ensure the safety of onboard system fuselage.
Reference Fig. 7, the onboard system of one embodiment of the invention, including：
Distribution module 10, for the unit type according to above-mentioned first HUB and the quantity of first node distribution each first
The corresponding parameter information of node.
The assigning process of the present embodiment is completed by onboard system.After other embodiments of the invention also can be by manual allocation,
Chip is write again.
Writing module 11：For writing the corresponding above-mentioned parameter information of each first node to the core built in onboard system
Piece.
The first HUB is the first order extension for being built in onboard system in the present embodiment, built-in on the mainboard of onboard system
The chip of first HUB, and write on the chip of the first HUB by writing module 11 each first node matching of the first HUB
Corresponding parameter information.
The embodiment of the present invention by the built-in chip type for the first HUB being connected with onboard system USB in onboard system mainboard
On, and different parameter information is distributed for each node of the first HUB, makes each node of the first HUB as single USB OTG,
And the channel path of onboard system is each connected for each individually USB OTG matchings, onboard system can distinguish each section of the first HUB
Point so that former one usb expansion of onboard system is multiple individually USB OTG, to meet the synthesis sexual development need of onboard system
Ask, meet the use demand of user.Moreover, the embodiment of the present invention can connect the 2nd HUB on each node of the first HUB, so as to
The USB of onboard system is further expanded on the basis of the first HUB.
The foregoing is merely the preferred embodiment of the present invention, is not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow shift that description of the invention and accompanying drawing content are made, it is related to be directly or indirectly used in other
Technical field, be included within the scope of the present invention.
Claims (10)
- A kind of 1. extended method of onboard system USB, it is characterised in that including：Obtain parameter information corresponding with each first node for the first HUB that onboard system USB is directly connected to；It is respectively that each first node matching connects with onboard system according to the corresponding parameter information of each first node Each first passage path connect；According to the first external equipment accessed on the first node of the first passage path access corresponding thereto.
- 2. the extended method of onboard system USB according to claim 1, it is characterised in that first external equipment is 2nd HUB, it is described according to the first external equipment accessed on first passage path access first node corresponding thereto The step of after, including：Identify the equipment number of the 2nd HUB；Judge whether the parameter information to match with the equipment number；If in the presence of obtaining the corresponding parameter information of each section point of the 2nd HUB；It is respectively that each section point matching connects with onboard system according to the corresponding parameter information of each section point The different second channel paths connect；According to the second external equipment accessed on the section point of the second channel path access corresponding thereto.
- 3. the extended method of onboard system USB according to claim 2, it is characterised in that it is described judge whether with The step of parameter information that the equipment number matches, including：Whether analysis inquires the parameter information to match with the equipment number of the 2nd HUB in preset data matching list；If inquiring, judge there is the parameter information to match with the equipment number of the 2nd HUB；If not inquiring, judge the parameter information to match with the equipment number of the 2nd HUB is not present.
- 4. the extended method of onboard system USB according to claim 2, it is characterised in that described logical according to described second Before path accesses the step of the second external equipment accessed on section point corresponding thereto, including：According to the quantity of the equipment number of the 2nd HUB and the 2nd HUB, the car being connected with the first HUB is calculated The magnitude of voltage and/or current value of loading system USB；Judge whether the magnitude of voltage and/or current value exceed threshold value；If so, then stop accessing second external equipment.
- 5. the extended method of onboard system USB according to claim 1, it is characterised in that it is described acquisition with it is described vehicle-mounted Before the step of each first node of the first HUB that system USB is directly connected to corresponding parameter information, including：Distribute each first node corresponding parameter information according to the unit type of the first HUB and the quantity of first node；By the chip built in the corresponding parameter information write-in onboard system of each first node.
- A kind of 6. onboard system, it is characterised in that including：First acquisition module, it is corresponding with each first node for the first HUB that onboard system USB is directly connected to for obtaining Parameter information；First matching module, for being respectively each first node according to the corresponding parameter information of each first node Match each first passage path being connected with onboard system；First access modules, for according to first accessed on first passage path access first node corresponding thereto External equipment.
- 7. onboard system according to claim 6, it is characterised in that first external equipment is the 2nd HUB, the car Loading system further includes：Identification module, for identifying the equipment number of the 2nd HUB；First judgment module, for the parameter information for judging whether to match with the equipment number；Second acquisition module, if in the presence of the corresponding parameter of each section point for obtaining the 2nd HUB is believed Breath；Second matching module, for being respectively each section point according to the corresponding parameter information of each section point Match the different second channel paths from onboard system connection；Second access modules, for according to second accessed on second channel path access section point corresponding thereto External equipment.
- 8. onboard system according to claim 7, it is characterised in that first judgment module, including：Analytic unit, for analyzing the equipment number phase whether inquired in preset data matching list with the 2nd HUB The parameter information matched somebody with somebody；First identifying unit, if for inquiring, judges that there is the parameter to match with the equipment number of the 2nd HUB believes Breath；Second identifying unit, if for not inquiring, judges the ginseng to match with the equipment number of the 2nd HUB is not present Number information.
- 9. onboard system according to claim 7, it is characterised in that further include：Computing module, for the equipment number and the quantity of the 2nd HUB according to the 2nd HUB, calculates and described the The magnitude of voltage and/or current value for the onboard system USB that one HUB is connected；Second judgment module, for judging whether the magnitude of voltage and/or current value exceed threshold value；Stopping modular, for if so, then stopping accessing second external equipment.
- 10. onboard system according to claim 6, it is characterised in that including：Distribution module, each first node pair is distributed for the unit type according to the first HUB and the quantity of first node The parameter information answered；Writing module, for the corresponding parameter information of each first node to be write to the chip built in onboard system.
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