CN109062840A - A kind of method and device of multiplex interface pin - Google Patents
A kind of method and device of multiplex interface pin Download PDFInfo
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- CN109062840A CN109062840A CN201810827778.8A CN201810827778A CN109062840A CN 109062840 A CN109062840 A CN 109062840A CN 201810827778 A CN201810827778 A CN 201810827778A CN 109062840 A CN109062840 A CN 109062840A
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- external module
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Classifications
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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
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
-
- 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
-
- 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]
Abstract
This application provides a kind of method and devices of multiplex interface pin, which comprises when being in the first working condition, sends the first information to the external module of connection using the first pin of interface；Obtain the second information that external module is returned in response to the first information；Judge whether the second information meets presupposed information；If so, into the second working condition, to be communicated using the first pin with progress information associated with the second working condition between external module.The method realizes the detecting in tablet computer and external connection keyboard mould group interface signal and bus signals, reduces pogo pin connectors number of pin, reduce equipment cost, save the device space by way of to pogo pin connectors pin multiplexing.
Description
Technical field
This application involves electronic fields, and in particular to the method for multiplex interface pin and the device of multiplex interface pin.
Background technique
Use spring needle (POGO pin) to connect when existing tablet computer (Tablet) connection external connection keyboard mould group (KBD) more
Device is attached, but spring needle (POGO pin) belongs to precision and the exigent connector of technique, and cost is in terms of needle number
Amount.
Baseband signal includes: power supply signal (PWR) in the interface signal of the external connection keyboard mould group of tablet computer, ground connection
Signal (GND) detects signal (Detect), serial communication bus (usb bus), system communications bus (system BUS).
Since spring needle (POGO pin) is exposed design, to prevent power supply from leaking electricity, short-circuit risks, it is necessary to design key
Disk detection function guarantees just to open power supply when there was only the connection of external connection keyboard mould group.
Due to the diversity of panel computer work mode and state, need designing system BUS, due to external connection keyboard mould group and
Communication system working condition and mode between tablet computer.
Depending on spring needle (POGO pin) quantity is with external keyboard module interface requirement, become a fixation of product
High cost component.
In view of the high cost factor of spring needle (POGO pin), it is rich that spring needle (POGO pin) quantity becomes product function
The key factor that richness and product cost are considered.
The quantity of spring needle (POGO pin) also determines the size and occupancy of spring needle (POGO pin) connector
Space, in increasingly lightening tablet computer product design become a crucial influence factor.
Summary of the invention
The application provides a kind of method of multiplex interface pin, a kind of device of multiplex interface pin；To reduce plate electricity
The spring needle quantity of pogo pin connectors between brain and external connection keyboard mould group reduces equipment cost, saves the device space.
In order to solve the above-mentioned technical problem, the embodiment of the present application provides the following technical solution:
This application provides a kind of methods of multiplex interface pin, comprising:
When being in the first working condition, the first information is sent to the external module of connection using the first pin of interface；
Obtain the second information that external module is returned in response to the first information；
Judge whether the second information meets presupposed information；
If so, into the second working condition, to utilize progress between the first pin and external module and the second work shape
The associated information communication of state.
Optionally, described to enter the second working condition, including following initialization:
Started by the second pin as external module power supply；
And the instruction external module enters the second working condition.
Optionally, it is described pass through the second pin start for the external module power after, further includes:
After disconnecting with the external module, stop through the second pin being external module power supply.
Optionally, before the external module described in described instruction enters the second working condition, further includes: obtain described external group
The information for the completion initialization that part returns.
Optionally, the method also includes: after being disconnected with external module, then enter the first working condition.
It is further, described to be disconnected with external module, comprising:
Within a preset time, it is logical to judge whether there is the progress information associated with the second working condition between external module
Letter；
If it is not, being then in an off state with external module.
This application provides a kind of devices of multiplex interface pin, comprising:
Information transmitting unit, for when being in the first working condition, using the first pin of interface to the external of connection
Component sends the first information；
Information acquisition unit, the second information returned for obtaining external module in response to the first information；
Judging unit, for judging whether the second information meets presupposed information；
When Status Change unit for the judging result in the judging unit is "Yes", then first pin enters
Second working condition, to be communicated using the first pin with progress information associated with the second working condition between external module.
Optionally, the second working condition, including following initialization are entered described in the Status Change unit: initial
Work two subelement of a subelement and initialization；
One subelement of initialization, for being started by the second pin as external module power supply；
Two subelement of initialization, for instructing the external module to enter the second working condition.
Optionally, after one subelement of initialization, further includes:
Stop power supply subelement, for after disconnecting with the external module, stopping through the second pin being external
Assembly power supply；
And/or
Before two subelement of initialization, further includes: it obtains and completes initialization information subelement, it is described for obtaining
The information for the completion initialization that external module returns.
Optionally, described device further include: enter the first working condition subelement, disconnected for working as with external module
Afterwards, then enter the first working condition.
It is further, described to enter the first working condition subelement, comprising:
Judgment sub-unit carries out and the second work shape within a preset time, judging whether there is between external module
The associated information communication of state；
When disconnection result subelement for the judging result in the judgment sub-unit is "No", then described device and outer
Connected components are in an off state.
Disclosure based on the above embodiment can know, the embodiment of the present application have it is following the utility model has the advantages that
This application provides a kind of method and devices of multiplex interface pin, which comprises when in the first work
When state, the first information is sent to the external module of connection using the first pin of interface；Obtain the first letter of external module response
The second information for ceasing and returning；Judge whether the second information meets presupposed information；If so, into the second working condition, so as to
It is communicated using the first pin with progress information associated with the second working condition between external module.The method passes through to spring
The mode of needle connector pin multiplexing realizes the detecting in tablet computer and external connection keyboard mould group interface signal and bus signals,
Reduce pogo pin connectors number of pin, reduce equipment cost, saves the device space.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the method for multiplex interface pin provided by the embodiments of the present application；
Fig. 2 is a kind of unit block diagram of the device of multiplex interface pin provided by the embodiments of the present application.
Specific embodiment
In the following, being described in detail in conjunction with specific embodiment of the attached drawing to the application, but not as the restriction of the application.
It should be understood that various modifications can be made to disclosed embodiments.Therefore, description above should not regard
To limit, and only as the example of embodiment.Those skilled in the art will expect in the scope and spirit of the present application
Other modifications.
The attached drawing being included in the description and forms part of the description shows embodiments herein, and with it is upper
What face provided is used to explain the application together to substantially description and the detailed description given below to embodiment of the application
Principle.
By the description of the preferred form with reference to the accompanying drawings to the embodiment for being given as non-limiting example, the application's
These and other characteristic will become apparent.
It is also understood that although the application is described referring to some specific examples, those skilled in the art
Member realizes many other equivalents of the application in which can determine, they have feature as claimed in claim and therefore all
In the protection scope defined by whereby.
When read in conjunction with the accompanying drawings, in view of following detailed description, above and other aspect, the feature and advantage of the application will become
It is more readily apparent.
The specific embodiment of the application is described hereinafter with reference to attached drawing；It will be appreciated, however, that the disclosed embodiments are only
Various ways implementation can be used in the example of the application.Known and/or duplicate function and structure and be not described in detail to avoid
Unnecessary or extra details makes the application smudgy.Therefore, specific structural and functionality disclosed herein is thin
Section is not intended to restrictions, but as just the basis of claim and representative basis be used to instructing those skilled in the art with
Substantially any appropriate detailed construction diversely uses the application.
This specification can be used phrase " in one embodiment ", " in another embodiment ", " in another embodiment
In " or " in other embodiments ", it can be referred to one or more of the identical or different embodiment according to the application.
Used when existing tablet computer (Tablet) external connection keyboard mould group (KBD) more spring needle (POGO pin) connector into
Row connection, but POGO pin belongs to precision and the exigent connector of technique, and cost is with the metering of needle number.
Baseband signal includes: power supply signal (PWR) in the interface signal of the external connection keyboard mould group of tablet computer, ground connection
Signal (GND) detects signal (Detect), serial communication bus (usb bus), system communications bus (system BUS).
Since POGO pin is exposed design, to prevent power supply from leaking electricity, short-circuit risks, it is necessary to design keyboard detection function
Can, guarantee just to open power supply when there was only the connection of external connection keyboard mould group.
Due to the diversity of panel computer work mode and state, need designing system BUS, due to external connection keyboard mould group and
Communication system working condition and mode between tablet computer.System BUS, which is used to the communication system state between Tablet and KBD, to be believed
It ceases (such as system S0, S3, S0ix etc.).
Usb bus is used as KBD mould group and system links up keypad information.
The application provides a kind of method of multiplex interface pin；The application also provides a kind of device of multiplex interface pin.
It is described in detail one by one in the following embodiments.
To first embodiment provided by the present application, i.e., a kind of embodiment of the method for multiplex interface pin.
The present embodiment is described in detail below with reference to Fig. 1, wherein Fig. 1 is a kind of method of multiplex interface pin
Flow chart.
Step S101 is sent using the first pin of interface to the external module of connection when being in the first working condition
The first information.
In the present embodiment, the external module refers to the external equipment connecting with tablet computer (Tablet), for example, key
Disk mould group (KBD).
The interface is the Border that two independent components carry out information exchange in computer system.This exchange
The combination for being also possible to them between computer soft and hardware, external equipment or the people operated can occur.This implementation
In example, the interface is the concept of hardware.For example, tablet computer (Tablet) and external equipment use spring needle (POGO pin)
Connector is as interface.
First pin of the interface is referred to and is multiplexed using the part pin of interface.For example, continue examples detailed above,
Using a spring needle (POGO pin) to realize system BUS signal and detect the purpose of signal multiplexing.Due to tablet computer
(Tablet) only with passing through detecting state between external connection keyboard mould group (KBD), it was demonstrated that after being reliably connected each other, tablet computer
It can be that external connection keyboard mould group is powered.Detection signal does not conflict in timing with system BUS signal, therefore, just multiple for two signals
Being there is provided with a spring needle (POGO pin) may.
It is described to be in the first working condition, for example, detecting state described in upper example.The default of external connection keyboard mould group (KBD)
State is detecting state.When tablet computer (Tablet) is connect with external connection keyboard mould group (KBD) by spring needle (POGO pin)
After device connection, tablet computer (Tablet) and external connection keyboard mould group (KBD) are in detecting state simultaneously.Tablet computer as a result,
(Tablet) external connection keyboard mould group of the spring needle (POGO pin) of spring needle (POGO pin) connector to connection is utilized
(KBD) first information, that is, detection information are sent.
The present embodiment further includes step 201, after disconnecting with external module, then enters the first working condition.For example,
After tablet computer (Tablet) and external connection keyboard mould group (KBD) disconnect, tablet computer (Tablet) is switched to detection shape
State.
It is described to be disconnected with external module, comprising:
It is related with the second working condition to judge whether there is the progress between external module within a preset time by step 201-1
The information of connection communicates；
Step 201-2, if so, being in connection status with external module；
Step 201-3, if it is not, being then in an off state with external module.
It is described within a preset time, judge whether there is and carry out associated with the second working condition letter between external module
Message communication.It is mainly communication system status information between tablet computer (Tablet) and external connection keyboard mould group (KBD), in order to anti-
It is more than preset time only due to long-time stop communicating information between tablet computer (Tablet) and external connection keyboard mould group (KBD),
Cause erroneous judgement tablet computer (Tablet) to disconnect with external connection keyboard mould group (KBD), can be sent out in the range of preset time
Send heartbeat message.
Step S102 obtains the second information that external module is returned in response to the first information.
The second information that the external module is returned in response to the first information, be exactly external module obtain the first information after,
Content according to the first information returns to the second information associated with the first information to sender.For example, tablet computer
(Tablet) detection information is sent to external keyboard module (KBD), after external connection keyboard mould group (KBD) detects detection content
" detection is normal " information or " detection failure " information are returned to tablet computer (Tablet).
Step S103, judges whether the second information meets presupposed information.
The presupposed information is exactly the condition that can enter the second working condition.For example, continuing examples detailed above, letter is preset
Breath is exactly " detection is normal " information, to tablet computer after external connection keyboard mould group (KBD) detects detection content
(Tablet) when returning to " detection is normal " information, then enter the second working condition.
Step S104, if so, into the second working condition, so as to using being carried out between the first pin and external module and the
The associated information communication of two working conditions.It is exactly to enter system BUS into the second working condition for example, continuing examples detailed above
Working condition.System BUS is carried out using the first pin namely between tablet computer (Tablet) and external connection keyboard mould group (KBD)
Information communication.
System BUS, can be depending on product specification demand, such as 1wire, I2C, SMBus, UART etc..
It is described to enter the second working condition, including following initialization: initialization one and initialization two.
Initialization one is started by the second pin as external module power supply.
Second pin, is different from the first pin, is implemented as the function of the external module power supply.
Initialization two instructs the external module to enter the second working condition.For example, tablet computer (Tablet) and outer
The working condition that keyboard module (KBD) is all switched to system BUS is connect, at this point, tablet computer (Tablet) and external connection keyboard mould group
(KBD) function of system BUS is realized by a spring needle (POGO pin) of spring needle (POGO pin) connector.
It is described pass through the second pin start for the external module power after, further includes:
After disconnecting with the external module, stop through the second pin being external module power supply.
Before the external module described in described instruction enters the second working condition, further includes: obtain the external module and return
Completion initialization information.
The present embodiment is based on the working sequence difference of unlike signal to realize pin multiplexing.
Usual usb bus is used as KBD mould group and system links up keypad information, and system BUS is used in tablet computer
(Tablet) communication system status information (such as system S0, S3, S0ix etc.) between external connection keyboard mould group (KBD).System BUS exists
Conflict in timing with usb bus, therefore usb bus generally not reusable spring needle (POGO pin).If system design is relatively easy,
System BUS communication system status information is not needed, equally can will test information and usb bus information multiplexing in fashion described above
Spring needle (POGO pin).It is needed using the chip for supporting usb bus, such as On Semi when switch operating state
NS5S1153。
When system BUS uses UART, because of the TX of UART, RX by TX/RX and can be detected with asynchronous transmission
The identical pin of information multiplexing.It in this way, bilateral system BUS communication both may be implemented, also may be implemented to detect, reduce spring needle
(POGO pin) quantity can achieve the quantity of spring needle (POGO pin) being reduced to 1 by 3 needles compared to for I2C/SMbus
The purpose of needle.
Corresponding with first embodiment provided by the present application, present invention also provides second embodiment, i.e., a kind of multiplexing connects
The device of mouth pin.Since second embodiment is substantially similar to first embodiment, so describe fairly simple, relevant part
Refer to the corresponding explanation of first embodiment.Installation practice described below is only schematical.
Fig. 2 shows a kind of embodiments of the device of multiplex interface pin provided by the present application.Fig. 2 is a kind of multiplex interface
The unit block diagram of the device of pin.
Referring to FIG. 2, the application provides a kind of device of multiplex interface pin, comprising: information transmitting unit 201, information
Acquiring unit 202, judging unit 203, Status Change unit 204；
Information transmitting unit 201 is used for when being in the first working condition, using the first pin of interface to outside connection
Connected components send the first information；
Information acquisition unit 202, the second information returned for obtaining external module in response to the first information；
Judging unit 203, for judging whether the second information meets presupposed information；
Status Change unit 204, for the judging result in the judging unit be "Yes" when, then first pin into
Enter the second working condition, so as to logical using the first pin and progress information associated with the second working condition between external module
Letter.
Optionally, the second working condition, including following initialization are entered described in the Status Change unit 204:
Two subelement of one subelement of initialization and initialization；
One subelement of initialization, for being started by the second pin as external module power supply；
Two subelement of initialization, for instructing the external module to enter the second working condition.
Optionally, after one subelement of initialization, further includes:
Stop power supply subelement, for after disconnecting with the external module, stopping through the second pin being external
Assembly power supply；
And/or
Before two subelement of initialization, further includes: it obtains and completes initialization information subelement, it is described for obtaining
The information for the completion initialization that external module returns.
Optionally, described device further include: enter the first working condition subelement, disconnected for working as with external module
Afterwards, then enter the first working condition.
It is further, described to enter the first working condition subelement, comprising:
Judgment sub-unit carries out and the second work shape within a preset time, judging whether there is between external module
The associated information communication of state；
When disconnection result subelement for the judging result in the judgment sub-unit is "No", then described device and outer
Connected components are in an off state.
It is apparent to those skilled in the art that for convenience and simplicity of description, the multiplexing of foregoing description
The device of interface pin, can be with reference to the corresponding description in first embodiment, and details are not described herein.
Above embodiments are only the exemplary embodiment of the application, are not used in limitation the application, the protection scope of the application
It is defined by the claims.Those skilled in the art can make respectively the application in the essence and protection scope of the application
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as falling within the scope of protection of this application.
Claims (10)
1. a kind of method of multiplex interface pin characterized by comprising
When being in the first working condition, the first information is sent to the external module of connection using the first pin of interface；
Obtain the second information that external module is returned in response to the first information；
Judge whether the second information meets presupposed information；
If so, into the second working condition, to be carried out and the second working condition phase using the first pin between external module
Associated information communication.
2. the method according to claim 1, wherein described enter the second working condition, including following initial work
Make:
Started by the second pin as external module power supply；
And the instruction external module enters the second working condition.
3. according to the method described in claim 2, it is characterized in that, starting in second pin that passes through as the external module
After power supply, further includes:
After disconnecting with the external module, stop through the second pin being external module power supply.
4. according to the method described in claim 2, it is characterized in that, the external module described in described instruction enters the second work shape
Before state, further includes: obtain the information for the completion initialization that the external module returns.
5. the method according to claim 1, wherein the method also includes: disconnected when with external module
Afterwards, then enter the first working condition.
6. according to the method described in claim 5, it is characterized in that, described disconnect with external module, comprising:
Within a preset time, it judges whether there is and carries out information communication associated with the second working condition between external module；
If it is not, being then in an off state with external module.
7. a kind of device of multiplex interface pin characterized by comprising
Information transmitting unit, for when be in the first working condition when, using interface external module from the first pin to connection
Send the first information；
Information acquisition unit, the second information returned for obtaining external module in response to the first information；
Judging unit, for judging whether the second information meets presupposed information；
Status Change unit, for the judging result in the judging unit be "Yes" when, then first pin enter second
Working condition, to be communicated using the first pin with progress information associated with the second working condition between external module.
8. the method according to the description of claim 7 is characterized in that entering the second work described in the Status Change unit
State, including following initialization: two subelement of one subelement of initialization and initialization；
One subelement of initialization, for being started by the second pin as external module power supply；
Two subelement of initialization, for instructing the external module to enter the second working condition.
9. according to the method described in claim 8, it is characterized in that, after one subelement of initialization, further includes:
Stop power supply subelement, for after disconnecting with the external module, stopping through the second pin being external module
Power supply；
And/or
Before two subelement of initialization, further includes: it obtains and completes initialization information subelement, it is described external for obtaining
The information for the completion initialization that component returns.
10. the method according to the description of claim 7 is characterized in that described device further include: it is single to enter the first working condition
Member, for after disconnecting with external module, then entering the first working condition；
It is further, described to enter the first working condition subelement, comprising:
Judgment sub-unit carries out and the second working condition phase between external module within a preset time, judging whether there is
Associated information communication；
Disconnection result subelement, for the judging result in the judgment sub-unit be "No" when, then described device with external group
Part is in an off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827778.8A CN109062840A (en) | 2018-07-25 | 2018-07-25 | A kind of method and device of multiplex interface pin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827778.8A CN109062840A (en) | 2018-07-25 | 2018-07-25 | A kind of method and device of multiplex interface pin |
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| Publication Number | Publication Date |
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| CN109062840A true CN109062840A (en) | 2018-12-21 |
Family
ID=64836388
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| CN201810827778.8A Pending CN109062840A (en) | 2018-07-25 | 2018-07-25 | A kind of method and device of multiplex interface pin |
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| CN109660646A (en) * | 2019-01-31 | 2019-04-19 | 华勤通讯技术有限公司 | Connect mould group and electronic equipment |
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Application publication date: 20181221 |
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| RJ01 | Rejection of invention patent application after publication |