CN109726157A - USB interface control method, terminal device, storage medium and computer program product - Google Patents
USB interface control method, terminal device, storage medium and computer program product Download PDFInfo
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- CN109726157A CN109726157A CN201711049822.9A CN201711049822A CN109726157A CN 109726157 A CN109726157 A CN 109726157A CN 201711049822 A CN201711049822 A CN 201711049822A CN 109726157 A CN109726157 A CN 109726157A
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Abstract
The embodiment of the present application discloses the USB interface control method and terminal device of a kind of terminal device, can reduce the corrosion to the pin of USB interface.The terminal device of the embodiment of the present application includes USB interface and switch.USB interface includes at least the first pin, and USB interface is for connecting USB device；Switch includes second pin and third pin；First pin is electrically connected with second pin, and third pin connects low level；When terminal device puts out screen, and USB device is extracted from terminal device, second pin is connect with third pin, so that the level of the first pin be dragged down.In the embodiment of the present application, when terminal device puts out screen, and USB device is extracted from terminal device, by the connection of second pin and third pin in switch, so that the level of the first pin is pulled low.So as to effectively reduce terminal device because water inlet or other outside environmental elements caused by USB interface because electrification caused by perishable problem.
Description
Technical field
This application involves USB interface control method, the terminals of field of mobile terminals more particularly to a kind of terminal device to set
Standby, storage medium and computer program product.
Background technique
Universal serial bus (universal serial bus, USB) charging is that mobile phone charging uses most common charging
Technology.The principle of USB charging is to identify corresponding equipment by agreement, according to the difference of equipment, configures different charging plans
Slightly.
All current industries using the terminal device of micro-USB interface are all to identify correspondence with the ID foot of USB interface
Equipment.And the terminal device of TYPE-C interface is used, it is to carry out detection device using the ID foot or CC foot of USB interface.
ID foot or CC foot the two pins (also referred to as PIN foot) are preparing to always detection peripheral equipment, are to locate always therefore
In electriferous state.Their level is close with cell voltage, but microampere (uA) level currents, driving capability are very weak.Work as terminal
When equipment is intake, faint electric current leads to ID foot or CC foot and ground forms current loop, the constantly electrode around ionization,
Electrochemical corrosion is formed, erosion adheres on the electrode, is connected to each PIN foot of USB, may result in each PIN foot level
It changes.Cause the USB interface of terminal device that can not identify when being inserted into equipment or even PIN foot is short-circuit, burning apparatus.
Summary of the invention
The embodiment of the present application provide the USB interface control method of terminal device a kind of, terminal device, storage medium and
Computer program product can reduce the corrosion to the pin of USB interface.
The embodiment of the present application first aspect provides a kind of terminal device, which includes USB interface, switch.Its
In, USB interface includes at least the first pin, and USB interface is for connecting USB device；Switch includes second pin and third pin；
First pin is electrically connected with second pin, and third pin connects low level；When terminal device puts out screen, and USB device is set from terminal
When standby extraction, second pin is connect with third pin.
In the embodiment of the present application, when terminal device puts out screen, and USB device is extracted from terminal device, by switch
The connection of second pin and third pin, so that the level of the first pin is pulled low.To by switch control USB interface
The level of first pin, can effectively reduce terminal device because water inlet or other outside environmental elements caused by USB interface because of band
Perishable problem caused by electricity prevents the USB interface of terminal device because of disabler problem caused by being corroded.
Optionally, USB interface further includes power pins, and switch further includes the 4th pin, and the 4th pin draws with the power supply
Foot connection, the 4th pin be used for when the terminal device puts out screen, control second pin connect with the third pin or
It disconnects.
Such as: when terminal device puts out screen, when USB device is inserted into terminal device, the level of Vbus becomes high level, with
The 4th pin control second pin and third pin of Vbus connection disconnect；When terminal device puts out screen, when USB device is from terminal
When equipment is extracted, the level of Vbus becomes low level, and the 4th pin control second pin and third pin connecting with Vbus connect
It connects.
Optionally, switch further includes the 5th pin, and the 5th pin is used to put out screen when terminal device, and the USB is set
When the standby extraction from the terminal device, controls the second pin and connect with the third pin.
Optionally, USB interface can be micro-USB interface, or TYPE-C interface.First pin can be institute
State the ID pin of micro-USB interface, or the CC pin of TYPE-C interface.
Second aspect, the embodiment of the present application also provides a kind of USB interface control methods of terminal device, for having
The terminal device of USB interface, this method comprises: put out screen when the terminal device, and when USB device is extracted from the USB interface,
The external live pins of USB interface are controlled, i.e. the first pin connects low level, and first pin can be CC pin or ID draws
Foot.
Because when user does not operate or when using terminal equipment, terminal device, which is in, puts out screen state, and USB interface does not have
USB device insertion.Therefore, when terminal device is in screen state of putting out, and the USB device of USB interface is extracted, by USB interface
The level of external live pins drags down, so as to when terminal device is not used in user, by the level of the live pins of leakage
It sets low.Terminal device can be effectively reduced because USB caused by water inlet or other outside environmental elements corrodes, so as to from electrical
Solve the problems, such as that USB interface corrodes in characteristic.
The third aspect, the embodiment of the present application provide a kind of terminal device, and specific implementation corresponds to above-mentioned second aspect and mentions
The function of the USB interface control method of confession.The function can also be executed corresponding soft by hardware realization by hardware
Part program is realized.Hardware and software includes one or more unit modules corresponding with above-mentioned function, and the unit module can
To be software and/or hardware.
In one implementation, the terminal includes memory, for storing instruction；Processor, it is described for calling
Instruction in memory executes method described in above-mentioned second aspect.
The another aspect of the application provides a kind of computer readable storage medium, in the computer readable storage medium
It is stored with instruction, when run on a computer, so that computer executes method described in above-mentioned second aspect.
The another aspect of the application provides a kind of computer program product comprising instruction, when it runs on computers
When, so that computer executes method described in above-mentioned second aspect.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that
In the embodiment of the present application, when terminal device is in screen state of putting out, and the USB device of USB interface is extracted, control
The external live pins connection low level of USB interface can effectively subtract so as to set low the level of the live pins of leakage
Few terminal device corrodes because of USB caused by water inlet or other outside environmental elements.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of USB interface in the embodiment of the present application；
Fig. 2 is a kind of structural schematic diagram of the terminal device in the embodiment of the present application；
Fig. 3 is that a kind of circuit of the terminal device in the embodiment of the present application realizes figure；
Fig. 4 is a kind of hardware structural diagram of the terminal device in the embodiment of the present application.
Specific embodiment
The embodiment of the present application is further elaborated below in conjunction with attached drawing.
The embodiment of the present application is suitable for the various terminal devices with USB interface, and the terminal device can be hand-held set
Standby, mobile unit, calculates equipment or various forms of user equipmenies (user equipment, UE) at wearable device.Such as:
It can be any terminal such as mobile phone, tablet computer, personal digital assistant (personal digital assistant, PDA) to set
It is standby.Terminal device can also be referred to as terminal (terminal).
As shown in Figure 1, the USB interface of the terminal device in the embodiment of the present application may include power pins Vbus, data
Pin DP and DM, identification pin ID or CC and grounding pin GND.One end of pin in USB interface leaks outside, one end and end
The internal component of end equipment connects.Because of the part pin of USB interface, such as: terminal device is worked as in ID pin or the electrification of CC pin
After moist or water inlet, the pin of leakage easily corrodes, and will lead to the funtion part failure or complete of the USB interface of terminal device
Failure.
In the embodiment of the present invention, the leakage live pins voltage of USB interface is reduced by switch, corruption can be effectively prevent
Erosion solves the problems, such as leakage PIN foot electrification from the root.It describes in detail below with reference to Fig. 2.
Fig. 2 is a kind of structural schematic diagram of the terminal device in the embodiment of the present application, and terminal device includes USB interface 201
With switch 202.USB interface 201 can refer to connection micro-USB equipment for connecting USB device, USB interface 201
Micro-USB interface may also mean that the TYPE-C interface of connection TYPE-C equipment.Switch 202 is used to control pair of USB interface
The voltage of outer live pins.
USB interface 201 includes at least the first pin 2011, and the first pin 2011 can be USB interface as shown in Figure 1
In any external live pins, for example, the first pin 2011 can be with ID when USB interface 201 refers to micro-USB interface
Pin, when USB interface 201 refers to TYPE-C interface, the first pin 2011 can be CC pin, and the first pin 2011 is in addition to institute
Other than the ID pin or CC pin of citing, can also be other pins externally charged in USB interface, the embodiment of the present application with
ID pin or CC pin are illustrated.
Switch 202 includes second pin 2021 and third pin 2022, and the first pin 2011 and second pin 2021 are electrically connected
It connecing, third pin 2022 connects low level, when terminal device puts out screen, and USB device is extracted from terminal device, second pin
2021 and third pin 2022 be electrically connected so that the level of the first pin 2011 is identical as the level of third pin 2022,
Become low level.
In the embodiment of the present application, the level of the first pin 2011 in USB interface 201 is controlled by switch 202, works as terminal
Equipment puts out screen, and USB device passes through the second pin 2021 and third pin 2022 in switch 202 from when terminal device extraction
Connection so that the level of the first pin 2011 is pulled low.So as to effectively reduce terminal device because of water inlet or other external worlds
USB interface caused by environmental factor prevents the USB interface of terminal device from causing because being corroded because of perishable problem caused by charging
Disabler problem.
Optionally, on the basis of Fig. 2 described embodiment, USB interface can also include power pins Vbus, and switch is also
It may include the 4th pin, the 4th pin is connect with Vbus, and the 4th pin is used for when terminal device puts out screen, controls second pin
With the connection and disconnection of third pin.
Terminal device is inserted by USB device or can control the height of the level of Vbus from terminal device extraction, thus
When terminal device puts out screen, the connection and disconnection of second pin and third pin are controlled by the 4th pin connecting with Vbus.
Such as: when terminal device puts out screen, when USB device is inserted into terminal device, the level of Vbus becomes high level, connect with Vbus
The 4th pin control second pin and third pin disconnect；When terminal device puts out screen, when USB device is extracted from terminal device
When, the level of Vbus becomes low level, and the 4th pin control second pin connecting with Vbus is connect with third pin.
Optionally, switch can also include the 5th pin, and the 5th pin is used for when terminal device puts out screen, and USB device
When extracting from terminal device, the connection of second pin and third pin is controlled, so that the level of the first pin draws with third
The level of foot is identical, becomes low level.
In most of usage scenario of terminal device, when user's operation or using terminal equipment, terminal device is in
Bright screen state or terminal device have USB device insertion；On the contrary, when user does not operate or when using terminal equipment, at terminal device
In putting out screen state, and the USB interface of terminal device does not have USB device insertion, i.e. USB device has been extracted from terminal device.This Shen
When terminal device is in screen state of putting out, and the USB device of USB interface is extracted, the first of USB interface please be drawn in embodiment
The level of foot drags down, so as to which when terminal device is in standby, the level of the live pins of leakage is set low.It can be with
Effectively reduce terminal device because water inlet or other outside environmental elements caused by USB corrode, so as to be solved from electrical characteristic
The problem of certainly USB interface corrodes.
Fig. 3 is a kind of electrical block diagram of the terminal device in the embodiment of the present application.The terminal device includes processing
Chip 301, the first pin 302 of USB interface, the power pins Vbus 303 of USB interface, universal input export (general
Purpose input output, GPIO) the 304, first metal-oxide-semiconductor 305 and the second metal-oxide-semiconductor 306 and the first adjustable resistance 307,
Second resistance 308 and 3rd resistor 309.
Wherein, as shown in figure 3, the first metal-oxide-semiconductor 305 and the second metal-oxide-semiconductor 306 are opened described in embodiment shown in Fig. 2
It closes.The pin that first metal-oxide-semiconductor 305 connects the first adjustable resistance 307 is second pin described in embodiment shown in Fig. 2,
First metal-oxide-semiconductor 305 and the pin of the second metal-oxide-semiconductor 306 ground connection are third pin described in embodiment shown in Fig. 2.
Optionally, can also be the first metal-oxide-semiconductor 305, the second metal-oxide-semiconductor 306, the first adjustable resistance 307, second resistance 308,
And 3rd resistor 309 is to switch described in embodiment shown in Fig. 2.First adjustable resistance 307 connects the first of USB interface
The pin of pin 302 is second pin described in embodiment shown in Fig. 2, and the first metal-oxide-semiconductor 305 and the second metal-oxide-semiconductor 306 connect
The pin on ground is third pin described in embodiment shown in Fig. 2.
First pin 302 of USB interface can be in CC foot in USB interface or ID foot or USB interface other externally
The pin of electrification.
Processing chip 301 is connected with one end of the first pin 302 and first adjustable resistance 307.First metal-oxide-semiconductor
305 drain electrode is connected with the other end of the first adjustable resistance 307, the source electrode ground connection of the first metal-oxide-semiconductor 305, grid and second resistance
The drain electrode of 308 one end and second metal-oxide-semiconductor 306 is connected.The grid and power pins Vbus 303 of second metal-oxide-semiconductor 306
It is connected, source electrode ground connection.The other end of second resistance 308 is connected with GPIO 304.
Wherein, processing chip 301 can be power transmission (Power delivery, PD) chip, be also possible to other cores
Piece, control of the processing chip 301 by the central processing unit (central processing units, CPU) of terminal device.Place
Reason chip 301, according to CC pin or the level of ID pin, identifies the type of USB device for providing current signal.
The resistance value of first adjustable resistance 307 be it is adjustable, the first adjustable resistance 307 is for dividing, on the one hand, the
When one metal-oxide-semiconductor 305 is connected, prevent electric current over the ground excessive, on the other hand, for when the first metal-oxide-semiconductor 305 is obstructed, by this
The partial pressure of resistance can drag down the level of the first pin 302.
GPIO 304 be for adjust the conducting of the first metal-oxide-semiconductor 305 with it is obstructed.The second resistance being connect with GPIO 304
308 can be the resistance of fixed resistance value, such as: on the one hand 100K resistance, effect are to prevent from being connected when the second metal-oxide-semiconductor 306
Electric current is excessive when ground connection, further aspect is that preventing surge and impact.
Vbus 303 be used to adjust the conducting of the second metal-oxide-semiconductor 306 with it is obstructed, when the level of Vbus 303 is high level,
The conducting of second metal-oxide-semiconductor 306, when the level of Vbus 303 is low level, the second metal-oxide-semiconductor 306 is obstructed.
When the level of the GPIO 304 is high level, and the level of the Vbus 303 is low level, described first
Metal-oxide-semiconductor 305 is connected, and second metal-oxide-semiconductor 306 is obstructed, and the level of first pin 302 switchs to low level by high level.
Optionally, in order to improve stability, Vbus 303 can also connect 3rd resistor 309, one end of 3rd resistor 309
The Vbus 303 is connected, the other end connects the grid of second metal-oxide-semiconductor 306.The 3rd resistor 309 can be fixed resistance
The resistance of value, such as: 100K resistance, which is used for Anti-surging or protecting against shock, to improve the stabilization of entire circuit
Property.
In a kind of specific embodiment, when the USB interface of terminal device does not have USB device insertion, i.e. USB device is pulled out
When out, the level of Vbus 303 is low level, when the USB interface of terminal device inserts USB device, the level of Vbus 303
For high level.
In a kind of specific embodiment, when the display screen of terminal device is in bright screen state, the electricity of GPIO 304
It puts down as low level, when the display screen of terminal device, which is in, puts out screen state, the level of GPIO 304 is high level.Specifically, can
With, when the display screen of terminal device is in bright screen state, GPIO is low level by the CPU of terminal device control, screen is put out when being in
When state, GPIO is high level.
It describes in detail below with reference to logic level of the table 1 to each pin.Low level, level 1 are indicated in table 1 for 0
Indicate high level.
When terminal device is in bright screen state, the level of GPIO is 0, when the USB that USB device is inserted into terminal device connects
When mouth, the level of Vbus switchs to 1 by 0, i.e., switchs to high level by low level, and the second metal-oxide-semiconductor (closes shape by obstructed state before
State) switch on state, it is obstructed state that the first metal-oxide-semiconductor, which is closed, and external the first pin of live pins maintains high level.
When terminal device is in bright screen state, the level of GPIO is 0, when the USB that USB device is inserted into terminal device connects
When keeping insert state after mouthful, the level of Vbus is 1, and the second metal-oxide-semiconductor is in the conductive state, and the first metal-oxide-semiconductor is in obstructed state,
The level of first pin maintains high level.
When terminal device is in bright screen state, the level of GPIO is 0, when the USB device being inserted into USB interface is extracted
When, the level of Vbus switchs to 0 by 1, i.e., switchs to low level by high level, and the second metal-oxide-semiconductor is switched to obstructed by state before
State, i.e. closed state, the first metal-oxide-semiconductor are closed, and are obstructed state, and the first pin maintains high level.
When terminal device, which is in, puts out screen state, the level of GPIO is 1, when the USB that USB device is inserted into terminal device connects
When mouth, the level of Vbus switchs to 1 by 0, i.e., switchs to high level by low level, and the second metal-oxide-semiconductor (closes shape by obstructed state before
State) switch on state, it is obstructed state that the first metal-oxide-semiconductor, which is closed, and the first pin maintains high level.
When terminal device, which is in, puts out screen state, the level of GPIO is 1, when the USB that USB device is inserted into terminal device connects
When keeping insert state after mouthful, the level of Vbus is 1, and the second metal-oxide-semiconductor is in the conductive state, and the first metal-oxide-semiconductor is in obstructed state,
The level of first pin maintains high level.
When terminal device, which is in, puts out screen state, the level of GPIO is 1, when the USB device being inserted into USB interface is extracted
When, the level of Vbus switchs to 0 by 1, i.e., switchs to low level by high level, and the second metal-oxide-semiconductor is switched to obstructed by state before
State, i.e. closed state, the first metal-oxide-semiconductor become on state from obstructed state, and the level of the first pin becomes low from high level
Level becomes 0.When putting out screen state to work as terminal device and be in, and there is no USB device insertion in USB interface, the first pin
Level be always low level.
Table 1
It is realized in conjunction with foregoing circuit, the USB interface control method of the terminal device in the embodiment of the present application, this method is used for
Terminal device with USB interface, this method comprises:
When the terminal device puts out screen, and USB device is extracted from the USB interface, the external of the USB interface is controlled
Live pins connect low level, and the external live pins are the first pin in Fig. 2 or embodiment shown in Fig. 3.
It optionally, is when the terminal device puts out screen, and USB TYPE C equipment when USB interface is TYPE-C interface
When extracting from the USB TYPE C interface, the CC pin connection low level of the USB TYPE C interface is controlled.
It optionally, is to work as the terminal device to put out screen, and micro-USB is set when USB interface is micro-USB interface
When the standby extraction from micro-USB C interface, the ID pin connection low level of the micro-USB interface is controlled.
The above method can be driven the program code stored in memory and driving circuit by the CPU of terminal device
It realizes.The specific implementation process of circuit sees description of the above-mentioned Fig. 2 into embodiment shown in Fig. 3.
It should be noted that above-mentioned Fig. 2 or circuit structure shown in Fig. 3 do not constitute limit to the circuit structure of terminal device
It is fixed, as long as the circuit structure for being able to achieve USB interface control method can constitute the terminal device in the embodiment of the present application
Circuit structure.Such as: under another circuit structure, it can also be when terminal device is in and puts out screen state, by the electricity of GPIO
When horizontal is low level.It is also possible to that the level of Vbus is set to height when the USB device of the USB interface of terminal device is extracted
Level.
It is to the circuit structure realization of the terminal device in the embodiment of the present application and Jie of USB interface control method above
It continues, the terminal device in the embodiment of the present application is introduced from hardware realization angle below.
Optionally, terminal device may include central processing unit (CPU) and memory, and the memory is for storing program
Code, the central processing unit call the said program code in the memory, to execute in above-mentioned USB interface control method
Operation, comprising: when USB device is extracted from the USB interface, control USB interface external live pins connection low level；
Or, put out screen when the terminal device, and when USB device is extracted from the USB interface, the external electrification of the USB interface is controlled
Pin connects low level.
It describes in detail below with reference to a kind of hardware configuration of the Fig. 4 to terminal device.Fig. 4 shows terminal device
The block diagram of fractional hardware structure, terminal device includes: radio frequency (Radio Frequency, RF) circuit 410, memory 420, defeated
Enter unit 430, display unit 440, sensor 450, voicefrequency circuit 460, Wireless Fidelity (wireless fidelity, WiFi)
The components such as module 470, central processing unit 480 and power supply 490, USB interface 411.It will be understood by those skilled in the art that Fig. 4
Shown in terminal device structure do not constitute the restriction to terminal device, may include than illustrating more or fewer components,
Perhaps certain components or different component layouts are combined.
It is specifically introduced below with reference to each component parts of the Fig. 4 to terminal device:
RF circuit 410 can be used for receiving and sending messages or communication process in, signal sends and receivees, particularly, by base station
After downlink information receives, handled to central processing unit 480；In addition, the data for designing uplink are sent to base station.In general, RF is electric
Road 410 includes but is not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier (Low Noise
Amplifier, LNA), duplexer etc..In addition, RF circuit 410 can also be communicated with network and other equipment by wireless communication.
Memory 420 can be used for storing software program and module, and central processing unit 480 is stored in memory by operation
420 software program and module, thereby executing the various function application and data processing of terminal device.Memory 420 can
It mainly include storing program area and storage data area, wherein storing program area can be needed for storage program area, at least one function
Application program (such as sound-playing function, image player function etc.) etc.；Storage data area can be stored according to terminal device
Use created data (such as audio data, phone directory etc.) etc..In addition, memory 420 may include high random access
Memory, can also include nonvolatile memory, a for example, at least disk memory, flush memory device or other are volatile
Property solid-state memory.
Input unit 430 can be used for receiving the number or character information of input, and generates and set with the user of terminal device
It sets and the related key signals of function control inputs.Specifically, input unit 430 may include touch panel 431 and other are defeated
Enter equipment 432.Touch panel 431, also referred to as touch screen collect touch operation (such as the user of user on it or nearby
Use the operation of any suitable object or attachment such as finger, stylus on touch panel 431 or near touch panel 431),
And corresponding attachment device is driven according to preset formula.Optionally, touch panel 431 may include touch detecting apparatus and
Two parts of touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation bring letter
Number, transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into
Contact coordinate, then give central processing unit 480, and order that central processing unit 480 is sent can be received and executed.In addition,
Touch panel 431 can be realized using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch surface
Plate 431, input unit 430 can also include other input equipments 432.Specifically, other input equipments 432 may include but not
It is limited to one of physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operating stick etc.
Or it is a variety of.
Display unit 440 can be used for showing information input by user or the information for being supplied to user.Display unit 440 can
Including display panel 441, optionally, liquid crystal display (liquid crystal display, LCD), You Jifa can be used
The forms such as optical diode (organic light-emitting diode, OLED) configure display panel 441.Further,
Touch panel 431 can cover display panel 441, after touch panel 431 detects touch operation on it or nearby, transmission
The type of touch event is determined to central processing unit 480, subsequent central processing unit 480 is being shown according to the type of touch event
Corresponding visual output is provided on panel 441.Although touch panel 431 and display panel 441 are only as two in Fig. 4
Vertical component realizes the input and input function of terminal device, but in some embodiments it is possible to by touch panel 431 with
Display panel 441 is integrated and that realizes terminal device output and input function.
Terminal device may also include at least one sensor 450, such as optical sensor, motion sensor and other sensings
Device.Specifically, optical sensor may include ambient light sensor and proximity sensor, wherein ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 441, and proximity sensor can close display when terminal device is moved in one's ear
Panel 441 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect (generally three in all directions
Axis) acceleration size, can detect that size and the direction of gravity when static, can be used to identify the application of terminal device posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The other sensors such as the gyroscope, barometer, hygrometer, thermometer, the infrared sensor that can also configure as terminal device,
This is repeated no more.
Voicefrequency circuit 460, loudspeaker 461, microphone 462 can provide the audio interface between user and terminal device.Sound
Electric signal after the audio data received conversion can be transferred to loudspeaker 461, be converted to by loudspeaker 461 by frequency circuit 460
Voice signal output；On the other hand, the voice signal of collection is converted to electric signal by microphone 462, is received by voicefrequency circuit 460
After be converted to audio data, then after audio data output central processing unit 480 is handled, through RF circuit 410 to be sent to such as
Another terminal device, or audio data is exported to memory 420 to be further processed.
WiFi belongs to short range wireless transmission technology, and terminal device can help user to receive and dispatch by WiFi module 470Electricity Sub- mail, browsing webpage and access streaming video etc., it provides wireless broadband internet for user and accesses.Although Fig. 4 shows
Go out WiFi module 470, but it is understood that, and it is not belonging to must be configured into for terminal device, it completely can be according to need
It to omit within the scope of not changing the essence of the invention.
Central processing unit 480 is the control centre of terminal device, utilizes various interfaces and the entire terminal device of connection
Various pieces, by running or execute the software program and/or module that are stored in memory 420, and call and be stored in
Data in memory 420 execute the various functions and processing data of terminal device, to carry out whole prison to terminal device
Control.Optionally, central processing unit 480 may include one or more processing units；Optionally, central processing unit 480 can be integrated and be answered
With processor and modem processor, wherein the main processing operation system of application processor, user interface and application program
Deng modem processor mainly handles wireless communication.It is understood that above-mentioned modem processor can not also integrate
Into central processing unit 480.In the embodiment of the present application, central processing unit 480 is for executing in above-mentioned USB interface control method
All or part of the steps.
Terminal device further includes the power supply 490 (such as battery) powered to all parts, it is preferred that power supply can pass through electricity
Management system and processor 480 are logically contiguous, to realize management charging, electric discharge and power consumption by power-supply management system
The functions such as management.
USB interface 411 is for connecting USB device.USB interface 411 may include the electricity in above-mentioned embodiment shown in FIG. 1
Source pin Vbus, data pin DP and DM, identification pin ID and/or CC and grounding pin GND.
Although being not shown, terminal device can also include camera, bluetooth module etc., and details are not described herein.
It should be noted that in the above-described embodiments, can wholly or partly by software, hardware, firmware or its
Any combination is realized.When implemented in software, it can entirely or partly realize in the form of a computer program product.
The computer program product includes one or more computer instructions.Load and execute on computers the meter
When calculation machine program instruction, entirely or partly generate according to process or function described in the embodiment of the present application.The computer can
To be general purpose computer, special purpose computer, computer network or other programmable devices.The computer instruction can be deposited
Storage in a computer-readable storage medium, or from a computer readable storage medium to another computer readable storage medium
Transmission, for example, the computer instruction can pass through wired (example from a web-site, computer, server or data center
Such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave) mode to another website
Website, computer, server or data center are transmitted.The computer readable storage medium can be computer and can deposit
Any usable medium of storage either includes that the data storages such as one or more usable mediums integrated server, data center are set
It is standby.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or partly lead
Body medium (such as solid state hard disk (solid state disk, SSD)) etc..
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.
The description and claims of this application and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein
Or the sequence other than the content of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, apparatus embodiments described above are merely indicative, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be through some interfaces or the INDIRECT COUPLING or communication link of unit
It connects, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.Some or all of unit therein can be selected to realize this embodiment scheme according to the actual needs.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application
Portion or part steps.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory,
ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. are various can store program
The medium of code.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of terminal device, which is characterized in that the terminal device includes USB interface, switch；
The USB interface includes at least the first pin；
The switch includes second pin, third pin；
The USB interface is for connecting USB device；
First pin is electrically connected with the second pin；
The third pin connects low level；
When the terminal device puts out screen, and USB device is extracted from the terminal device, the second pin is drawn with the third
Foot electrical connection.
2. terminal device according to claim 1, which is characterized in that the USB interface further includes power pins, described to open
Pass further includes the 4th pin, is connect with the power pins, and the 4th pin is used for when the terminal device puts out screen, control
The second pin is connected or disconnected with the third pin.
3. terminal device according to claim 1 or 2, which is characterized in that the switch further includes the 5th pin, and described
Five pins are used to put out screen when terminal device, and when the USB device is extracted from the terminal device, control the second pin and
The third pin connection.
4. terminal device according to any one of claim 1-3, which is characterized in that first pin is the USB
The CC pin or ID pin of interface.
5. a kind of general-purpose serial bus USB interface control method of terminal device, for the terminal device with USB interface,
It is characterized in that, which comprises
When the terminal device puts out screen, and USB device is extracted from the USB interface, control the USB interface CC pin or
ID pin connects low level.
6. a kind of terminal device, the terminal includes memory, for storing instruction；Processor, for calling the memory
In instruction, execute method described in above-mentioned power 5.
7. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer is executed as weighed
Benefit require 5 described in method.
8. a kind of computer program product comprising instruction, when run on a computer, so that computer executes such as right
It is required that method described in 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049822.9A CN109726157A (en) | 2017-10-31 | 2017-10-31 | USB interface control method, terminal device, storage medium and computer program product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049822.9A CN109726157A (en) | 2017-10-31 | 2017-10-31 | USB interface control method, terminal device, storage medium and computer program product |
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| CN109726157A true CN109726157A (en) | 2019-05-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711049822.9A Pending CN109726157A (en) | 2017-10-31 | 2017-10-31 | USB interface control method, terminal device, storage medium and computer program product |
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| CN (1) | CN109726157A (en) |
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| CN112422145A (en) * | 2020-11-10 | 2021-02-26 | 上海移远通信技术股份有限公司 | Intercom |
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| CB02 | Change of applicant information |
Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Applicant after: Huawei Device Co., Ltd. Address before: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Applicant before: HUAWEI terminal (Dongguan) Co., Ltd. |
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Application publication date: 20190507 |