CN108155623A - A kind of terminal USB interface guard method, terminal and external equipment - Google Patents
A kind of terminal USB interface guard method, terminal and external equipment Download PDFInfo
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- CN108155623A CN108155623A CN201810057931.3A CN201810057931A CN108155623A CN 108155623 A CN108155623 A CN 108155623A CN 201810057931 A CN201810057931 A CN 201810057931A CN 108155623 A CN108155623 A CN 108155623A
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- 238000012544 monitoring process Methods 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 9
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- 238000003860 storage Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000013507 mapping Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 abstract description 12
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored
- G06F11/3027—Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system component is a bus
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored
- G06F11/3041—Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system component is an input/output interface
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3058—Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations
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Abstract
The present embodiments relate to a kind of electronic technology field more particularly to terminal USB interface guard method, terminal and external equipment, for avoiding the excessively high caused USB interface burnout problems of terminal USB interface temperature.Terminal obtains the temperature of USB interface in the case of the external external equipment of USB interface；Terminal sends overcurrent protection information in the case where the temperature for determining USB interface is more than temperature threshold, by the data signal line that USB interface connects to external equipment；Overcurrent protection information is used to indicate the bus power source Vbus lines that external equipment stops connecting to USB interface and powers.In this way, not only can be with effective protection USB interface, USB interface burnout problems caused by avoiding USB interface temperature excessively high；And relative to the protection mechanism that high-power MOS tube is used to carry out switch control in the prior art, it can realize and reduce metal-oxide-semiconductor occupied space and saving cost.
Description
Technical field
The present embodiments relate to electronic technology field more particularly to a kind of terminal USB interface guard method, terminals and outer
Portion's equipment.
Background technology
At present, the charger of many mobile terminals is all using universal serial bus (Universal Serial Bus, abbreviation
USB) interface is communicated with extraneous, and frequent use of USB interface also results in dramatically increasing for USB failure rates, for example, charging process
Burn-back lip reflex caused by middle interface water inlet or device aging short circuit.
In the prior art, the temperature change of USB interface is monitored at the nearly USB interface of terminal, reaches setting value in temperature
Short switch is just opened afterwards by bus power source (Vbus) shorted to earth, is disconnected so as to trigger charger high current protection mechanism
Vbus achievees the purpose that USB interface is protected not to be burned out.The short switch of this protection mechanism, need using high-power metallic-
Oxide-Semiconductor Field effect crystal (Metal-Oxide-Semiconductor Field-Effect Transistor,
MOSFET) pipe carries out switch control, and when metal-oxide-semiconductor opens short switch, charging wire, USB interface etc. need to bear high current, hold
Easily cause danger.
Invention content
The embodiment of the present invention provides a kind of terminal USB interface guard method, terminal and external equipment, effective to realize
Terminal USB interface is protected, USB interface burnout problems caused by avoiding terminal USB interface temperature excessively high.
The embodiment of the present invention provides a kind of terminal USB interface guard method, including：
Terminal obtains the temperature of the USB interface in the case of the external external equipment of USB interface；
The terminal is connected in the case where the temperature for determining the USB interface is more than temperature threshold by the USB interface
The data signal line connect sends overcurrent protection information to the external equipment；The overcurrent protection information is used to indicate the outside
The bus power source Vbus lines that equipment stops connecting to the USB interface are powered.
Optionally, the data signal line includes data minus (Data Minus, abbreviation DM) signal wire and data just (Data
Positive, abbreviation DP) signal wire；The overcurrent protection information includes default high level signal and the default low level letter
Number；The terminal is connected in the case where the temperature for determining the USB interface is more than temperature threshold by the USB interface
Data signal line sends overcurrent protection information to the external equipment, including：The terminal is in the temperature for determining the USB interface
In the case of more than the temperature threshold, the default high level signal is inputted to the DM signal wires, and to the DP signals
Line inputs the default low level signal.
Optionally, the temperature for obtaining the USB interface, including：The terminal obtains negative temperature coefficient NTC temperature-sensitives electricity
The level of device is hindered, and analog-to-digital conversion is carried out to the level and obtains voltage value；The NTC themistor and the USB interface
It is disposed adjacent；The terminal determines the temperature of the USB interface according to the voltage value and voltage temperature mapping relations.
The embodiment of the present invention provides a kind of terminal USB interface guard method, including：External equipment is connected by USB interface
Data signal line in line receives the overcurrent protection information that terminal is sent；The USB interface connecting line and the USB of the terminal connect
Mouth electrical connection；The external equipment stops the bus power source Vbus connected to the USB interface according to the overcurrent protection information
Line is powered.
Optionally, the data signal line includes data minus DM signal wires and the positive DP signal wires of data；The overcurrent protection
Information includes default high level signal and the default low level signal；The external equipment according to the overcurrent protection information,
The bus power source Vbus lines for stopping connecting to the USB interface are powered, including：The external equipment is connect by the DM signal wires
It receives the default high level signal and the default low level signal is received by the DP signals, stop to the USB
The bus power source Vbus lines power supply of interface connection.
The embodiment of the present invention provides a kind of terminal, including USB interface, temperature monitoring module and processor；The processor
It is connect respectively with the USB interface and the temperature monitoring module；The temperature monitoring module, for monitoring the USB interface
Temperature；The processor, for obtaining the temperature of the USB interface in the case of the external external equipment of the USB interface,
And in the case where the temperature of the USB interface is more than temperature threshold, by the data signal line of the connection of the USB interface to
The external equipment sends overcurrent protection information；The overcurrent protection information is used to indicate the external equipment and stops to described
The bus power source line Vbus lines power supply of USB interface connection.
Optionally, the temperature monitoring module includes detection circuit and mould containing negative temperature coefficient NTC themistor
Number converter；The NTC themistor is disposed adjacent with the USB interface；The analog-digital converter, is used for：Described in acquisition
The level of the NTC themistor in detection circuit, and analog-to-digital conversion is carried out to the level and obtains voltage value；The place
Device is managed, is used for：According to the voltage value and voltage temperature mapping relations, the temperature of the USB interface is determined.
The embodiment of the present invention provides a kind of external equipment, including power supply adaptor and USB interface connecting line：The USB connects
Mouth connecting line, signal is transmitted when being connect for the USB interface with terminal；The power supply adaptor, is used for：It is connect according to the USB
The overcurrent protection information that data signal line in mouth connecting line receives, stops defeated to the bus power source line Vbus of the USB interface
Enter.
The embodiment of the present invention provides a kind of computer readable storage medium, and the computer-readable recording medium storage calculates
Machine instructs, and the computer instruction is used to that computer to be made to perform the terminal USB interface guard method that any of the above-described embodiment provides.
The embodiment of the present invention provides a kind of electronic equipment, including：Memory, for storing program instruction；Processor is used for
The program instruction stored in the memory is called, the terminal USB of any of the above-described embodiment offer is provided according to the program of acquisition
Interface protection method.
In the embodiment of the present invention, terminal obtains the temperature of USB interface in the case of the external external equipment of USB interface；Eventually
In the case where the temperature for determining USB interface is more than temperature threshold, the data signal line connected by USB interface is set to outside at end
Preparation passes through stream protection information；Overcurrent protection information is used to indicate external equipment and stops the bus power source being connected to USB interface
Vbus lines are powered.So, on the one hand, by external equipment send overcurrent protection information, can realize external equipment stop to
The bus power source Vbus lines power supply of USB interface connection, and then ensure that the temperature of USB interface will not be excessively high, it can be with effective protection USB
Interface, USB interface burnout problems caused by avoiding USB interface temperature excessively high；On the other hand, relative in the prior art using big
Power MOS pipe carries out the protection mechanism of switch control, and USB interface protection scheme provided in an embodiment of the present invention, which can also be realized, to be subtracted
Few metal-oxide-semiconductor occupied space and saving cost.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.
Fig. 1 protects system architecture schematic diagram for a kind of terminal USB interface provided in an embodiment of the present invention；
Fig. 2 is the terminal USB interface guard method flow diagram that a kind of end side provided in an embodiment of the present invention performs；
Fig. 3 is that the terminal USB interface guard method flow that a kind of external equipment side provided in an embodiment of the present invention performs is shown
It is intended to；
Fig. 4 is provided in an embodiment of the present invention in another terminal USB interface guard method flow diagram；
Fig. 5 is a kind of structure diagram of terminal provided in an embodiment of the present invention；
Fig. 6 is a kind of structure diagram of external equipment provided in an embodiment of the present invention.
Specific embodiment
In order to which the purpose of the present invention, technical solution and advantageous effect is more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Fig. 1 illustrates a kind of terminal USB interface protection system architecture schematic diagram that the embodiment of the present invention is applicable in, such as
Shown in Fig. 1, which includes terminal 100 and external equipment 200.
Terminal 100 includes the processor 110, usb 1 20, temperature monitoring module 130 being located on mainboard.Temperature monitoring
Module 130 is used to monitor the temperature of usb 1 20.Optionally, temperature monitoring module 130 includes detection circuit 131 and modulus turns
Parallel operation 132, wherein, detection circuit 131 includes negative temperature coefficient (Negative Temperature Coefficient, abbreviation
NTC) resistor 133 and divider resistance 134.
NTC resistors 133 are arranged on the position adjacent with USB interface, for monitoring the temperature of USB interface.NTC resistors
133 resistance value changes with the variation for the temperature for monitoring USB interface, such as the temperature raising of USB interface, NTC resistance
The resistance value of device 133 reduces；The temperature of USB interface reduces, the resistance value raising of NTC resistors 133.
134 one end of divider resistance connects voltage source, other end connection NTC resistors 133, that is to say, that NTC resistors
133 and divider resistance 134 be connected on the circuit where voltage source.The external pin of analog-digital converter 132 is connected to NTC resistance
On circuit between device 133 and divider resistance 134, the voltage of NTC resistors 133 can be obtained.Microprocessor according to voltage and
The relationship of electric current and the voltage of NTC resistors 133 can obtain the resistance value of NTC resistors 133；Further according to resistance value and
The correspondence of temperature can obtain the corresponding temperature of 133 resistance value of NTC resistors.
External equipment 200 includes power supply adaptor 210 and USB interface connecting line 220.Terminal 100 and external equipment 200 are logical
USB interface connecting line 220 is crossed to be connected.Wherein, USB interface connecting line 220 includes data minus DM signal wires 221, the positive DP of data
Signal wire 222 and bus power source Vbus lines 223.
Below to how to realize that terminal USB interface guard method describes in detail.
Based on system architecture shown in FIG. 1, Fig. 2 illustrates a kind of end side provided in an embodiment of the present invention and performs
Terminal USB interface guard method flow diagram.
As shown in Fig. 2, a kind of terminal USB interface guard method provided in an embodiment of the present invention, includes the following steps：
Step 201：Terminal obtains the temperature of USB interface in the case of the external external equipment of USB interface；
Step 202：Terminal is connected in the case where the temperature for determining USB interface is more than temperature threshold by USB interface
Data signal line sends overcurrent protection information to external equipment；Overcurrent protection information is used to indicate external equipment and stops connecing to USB
The bus power source Vbus lines power supply of mouth connection.
In the embodiment of the present invention, terminal can be the electronics that the usable external equipments such as mobile phone, tablet computer charge
Equipment；The equipment that it can be terminal charge that external equipment, which can be, such as charger, computer etc..
In the embodiment of the present invention, terminal obtains the temperature of USB interface in the case of the external external equipment of USB interface；Eventually
In the case where the temperature for determining USB interface is more than temperature threshold, the data signal line connected by USB interface is set to outside at end
Preparation passes through stream protection information；Overcurrent protection information is used to indicate external equipment and stops the bus power source being connected to USB interface
Vbus lines are powered.So, on the one hand, by external equipment send overcurrent protection information, can realize external equipment stop to
The bus power source Vbus lines power supply of USB interface connection, and then ensure that the temperature of USB interface will not be excessively high, it can be with effective protection USB
Interface, USB interface burnout problems caused by avoiding USB interface temperature excessively high；On the other hand, relative in the prior art using big
Power MOS pipe carries out the protection mechanism of switch control, and USB interface protection scheme provided in an embodiment of the present invention, which can also be realized, to be subtracted
Few metal-oxide-semiconductor occupied space and saving cost.
Correspondingly, in terminal after external equipment sends overcurrent protection information, external equipment performs following terminal USB and connects
Mouth guard method, as shown in figure 3, including the following steps：
Step 301：External equipment receives the overcurrent protection of terminal transmission by the data signal line in USB interface connecting line
Information；Wherein, USB interface connecting line is electrically connected with the USB interface of terminal；
Step 302：According to overcurrent protection information, the bus power source Vbus lines for stopping connecting to USB interface supply external equipment
Electricity.
In the embodiment of the present invention, the bus power source Vbus lines that external equipment stops connecting to USB interface are powered, in this way, one
Aspect, it is ensured that the temperature of USB interface will not be excessively high, can avoid USB interface temperature is excessively high from leading with effective protection USB interface
The USB interface burnout problems of cause；On the other hand, the protection that this bus power source Vbus lines for stopping connecting to USB interface are powered
Mode can realize the effect for reducing metal-oxide-semiconductor occupied space and saving cost.
In a kind of mode of achievable step 201, the temperature for obtaining USB interface includes：Terminal obtains negative temperature coefficient NTC
The level of thermal resistor, and analog-to-digital conversion is carried out to level and obtains voltage value；NTC themistor is adjacent with USB interface to be set
It puts；Terminal determines the temperature of USB interface according to voltage value and voltage temperature mapping relations.
In the embodiment of the present invention, NTC themistor is arranged on USB interface close position, can monitor the temperature of USB interface
Degree, and the resistance value of NTC themistor can change with the variation of ambient temperature, so obtaining NTC themistor
Resistance value is assured that out the temperature of USB interface according to the correspondence of resistance value and temperature.It in this way, can in real time, accurately
Determining USB interface temperature, in timely taking measures when the temperature is excessively high for USB interface, to avoid the temperature mistake of USB interface
The problem of USB interface is burnt caused by height.
Below for how by sending overcurrent protection information to external equipment, it is detailed to realize that the protection of terminal USB interface carries out
It describes in detail bright.
USB interface connecting line in above-described embodiment includes data signal line and Vbus lines.Wherein, data signal line includes
Data minus DM signal wires and the positive DM signal wires of data.
When being charged due to terminal by USB interface connecting line, DM signals and DP signals meet QC2.0 agreements, therefore, can be with
By controlling the voltage value of DM signal wires and DP signal wires, overcurrent protection information is sent to external equipment.
In a kind of optional embodiment, overcurrent protection information includes default high level signal and default low level signal.
Terminal is in the case where the temperature for determining USB interface is more than temperature threshold, and the data signal line connected by USB interface is to outside
Equipment sends overcurrent protection information, including：Terminal is believed in the case where the temperature for determining USB interface is more than temperature threshold to DM
The default high level signal of number line input, and input default low level signal to DP signal wires.
Specifically, terminal loads on the DM/DP signal wires of USB interface voltage value adjusts the AD/AC's of itself
Output voltage, correspondence are as shown in table 1 below：
Table 1 shows output voltage and the correspondence of on-load voltage value on DM/DP signal wires
| State | DP | DM | Output voltage (Output) |
| 1 | 0.6V | 0.6V | 12V |
| 2 | 3.3V | 0.6V | 9V |
| 3 | 3.3V | 3.3V | 20V |
| 4 | 0.6V | GND | 5V(default) |
| 5 | 0.6V | 3.3V | Start overcurrent protection |
As shown in table 1, the output voltage in state 1 to 4 to be supported in QC2.0 agreements is electric with being loaded on DM/DP signal wires
The correspondence of pressure value, the bar state newly-increased for the present invention of state 5, voltage value is 0.6V on DP signal wires, on DM signal wires
When voltage value is 3.3V, start overcurrent protection, i.e., terminal is when the temperature for determining USB interface is more than temperature threshold, in DP signals
The voltage of the 0.6V of line loading simultaneously loads the voltage of 3.3V in DM signal wires, and overcurrent protection letter is sent to realize to external equipment
Breath.Ensure that the temperature of USB interface will not be excessively high in this way, can realize, can USB interface temperature be avoided with effective protection USB interface
USB interface burnout problems caused by excessively high；Relative to the protection machine that high-power MOS tube is used to carry out switch control in the prior art
System, USB interface protection scheme provided in an embodiment of the present invention, which can also be realized, reduces metal-oxide-semiconductor occupied space and saving cost.
Correspondingly, external equipment, according to overcurrent protection information, the bus power source Vbus lines for stopping connecting to USB interface supply
Electricity, including：External equipment receives default high level signal by DM signal wires and receives default low electricity by DP signal wires
Ordinary mail number, the bus power source Vbus lines for stopping connecting to USB interface are powered.For example, for example external equipment determines DM signals
Voltage on line is that the voltage on 3.3V and DP signal wires is 0.6V, then stops the bus power source Vbus lines connected to USB interface
Power supply.In this way, can realize and then ensure that the temperature of USB interface will not be excessively high, USB can be avoided to connect with effective protection USB interface
USB interface burnout problems caused by mouth temperature is excessively high；Moreover, relative to being switched in the prior art using high-power MOS tube
The protection mechanism of control, USB interface protection scheme provided in an embodiment of the present invention can also realize reduce metal-oxide-semiconductor occupied space and
Save cost.
Above method flow is introduced in order to clearer, the embodiment of the present invention provides the example below.
Fig. 4 illustrates another terminal USB interface guard method flow diagram provided in an embodiment of the present invention,
Based on system architecture shown in FIG. 1, as shown in figure 4, this method includes the following steps：
Step 401：Terminal obtains negative temperature coefficient NTC themistor in the case of the external external equipment of USB interface
Level, and to level carry out analog-to-digital conversion obtain voltage value；NTC themistor is disposed adjacent with USB interface；
Step 402：Terminal determines the temperature of USB interface according to voltage value and voltage temperature mapping relations；
Step 403：Terminal determines whether the temperature of USB interface is more than temperature threshold according to the temperature of USB interface；If so,
Then perform step 404；If it is not, then perform step 407；
Step 404：Default high level signal is inputted, and default low level signal is inputted to DP signal wires to DM signal wires；
Step 405：Whether external equipment receives default high level signal by DM signal wires and is connect by DP signal wires
Receive default low level signal；If so, perform step 406；If it is not, then perform step 407；
Step 406：The bus power source Vbus lines for stopping connecting to USB interface are powered；
Step 407：Without any operation.
It can be seen from the above：Terminal obtains the temperature of USB interface in the case of the external external equipment of USB interface
Degree；Terminal the temperature for determining USB interface be more than temperature threshold in the case of, by USB interface connect data signal line to
External equipment sends overcurrent protection information；Overcurrent protection information is used to indicate external equipment and stops the bus being connected to USB interface
Power supply Vbus lines are powered.So, on the one hand, by sending overcurrent protection information to external equipment, can realize that external equipment stops
It only powers to the bus power source Vbus lines that USB interface connects, and then ensures that the temperature of USB interface will not be excessively high, can effectively protect
USB interface is protected, USB interface burnout problems caused by avoiding USB interface temperature excessively high；On the other hand, relative in the prior art
The protection mechanism of switch control is carried out using high-power MOS tube, USB interface protection scheme provided in an embodiment of the present invention can be with
It realizes and reduces metal-oxide-semiconductor occupied space and saving cost.
Based on same idea, a kind of terminal provided in an embodiment of the present invention, for performing the terminal that above-mentioned end side performs
USB interface guard method flow.
Fig. 5 illustrates a kind of structure diagram of terminal provided in an embodiment of the present invention.As shown in figure 5, terminal
500 include processor 501, USB interface 502 and temperature monitoring module 503；The processor 501 respectively with the USB interface
502 and the temperature monitoring module 503 connect.Wherein：
The temperature monitoring module 503, for monitoring the temperature of the USB interface 502；
The processor 501, for obtaining the USB interface in the case of the 502 external external equipment of USB interface
502 temperature, and in the case where the temperature of the USB interface 502 is more than temperature threshold, pass through the company of the USB interface 502
The data signal line connect sends overcurrent protection information to the external equipment；The overcurrent protection information is used to indicate the outside
The bus power source line Vbus lines that equipment stops connecting to the USB interface 502 are powered.
In the embodiment of the present invention, terminal obtains the temperature of USB interface in the case of the external external equipment of USB interface；Eventually
In the case where the temperature for determining USB interface is more than temperature threshold, the data signal line connected by USB interface is set to outside at end
Preparation passes through stream protection information；Overcurrent protection information is used to indicate external equipment and stops the bus power source being connected to USB interface
Vbus lines are powered.So, on the one hand, by external equipment send overcurrent protection information, can realize external equipment stop to
The bus power source Vbus lines power supply of USB interface connection, and then ensure that the temperature of USB interface will not be excessively high, it can be with effective protection USB
Interface, USB interface burnout problems caused by avoiding USB interface temperature excessively high；On the other hand, relative in the prior art using big
Power MOS pipe carries out the protection mechanism of switch control, and USB interface protection scheme provided in an embodiment of the present invention, which can also be realized, to be subtracted
Few metal-oxide-semiconductor occupied space and saving cost.
Optionally, the temperature monitoring module 503 include the detection circuit containing negative temperature coefficient NTC themistor and
Analog-digital converter；The NTC themistor is disposed adjacent with the USB interface 502；The analog-digital converter, is used for：It obtains
The level of the NTC themistor in the detection circuit, and analog-to-digital conversion is carried out to the level and obtains voltage value；Institute
Processor 501 is stated, is used for：According to the voltage value and voltage temperature mapping relations, the temperature of the USB interface 502 is determined.
Optionally, the data signal line includes data minus DM signal wires and the positive DP signal wires of data；The overcurrent protection
Information includes default high level signal and the default low level signal；Processor 501, is used for：Determining the USB interface
In the case that 502 temperature is more than the temperature threshold, the default high level signal is inputted to the DM signal wires, and to institute
It states DP signal wires and inputs the default low level signal.
Based on same idea, a kind of external equipment provided in an embodiment of the present invention is held for performing said external equipment side
Capable terminal USB interface guard method flow.
Fig. 6 illustrates a kind of structure diagram of external equipment provided in an embodiment of the present invention.As shown in fig. 6,
External equipment 600 includes power supply adaptor 601 and USB interface connecting line 602.Wherein：
USB interface connecting line 602 transmits signal when being connect for the USB interface with terminal；
Power supply adaptor 601, is used for：The overcurrent protection letter that data signal line in USB interface connecting line 602 receives
Breath stops the bus power source line Vbus inputs to USB interface.
In the embodiment of the present invention, the bus power source Vbus lines that external equipment stops connecting to USB interface are powered, in this way, one
Aspect, it is ensured that the temperature of USB interface will not be excessively high, can avoid USB interface temperature is excessively high from leading with effective protection USB interface
The USB interface burnout problems of cause；On the other hand, the protection that this bus power source Vbus lines for stopping connecting to USB interface are powered
Mode can realize the effect for reducing metal-oxide-semiconductor occupied space and saving cost.
Optionally, data signal line includes data minus DM signal wires and the positive DP signal wires of data；Overcurrent protection information includes
Default high level signal and default low level signal；Power supply adaptor 601, is used for：Default high electricity is received by DM signal wires
Ordinary mail number and default low level signal is received by DP signal wires, the bus power source Vbus lines for stopping connecting to USB interface supply
Electricity.
Based on same idea, the embodiment of the present invention provides a kind of electronic equipment, including memory and processor.Wherein：It deposits
Reservoir, for storing program instruction；Processor, for calling the program instruction stored in the memory, according to the journey of acquisition
Sequence performs the terminal USB interface guard method of above-mentioned end side execution or performs the terminal USB that said external equipment side performs and connects
Mouth guard method.
Based on same idea, the embodiment of the present invention provides a kind of computer readable storage medium, described computer-readable to deposit
Storage media stores computer instruction, and the terminal USB that the computer instruction is used to that computer to be made to perform above-mentioned end side execution connects
Mouth guard method performs the terminal USB interface guard method that said external equipment side performs.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or the embodiment in terms of combining software and hardware can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can be used in one or more computers for wherein including computer usable program code
The shape of computer program product that storage media is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of terminal USB interface guard method, which is characterized in that including：
Terminal obtains the temperature of the USB interface in the case of the external external equipment of USB interface；
The terminal is connected in the case where the temperature for determining the USB interface is more than temperature threshold by the USB interface
Data signal line sends overcurrent protection information to the external equipment；The overcurrent protection information is used to indicate the external equipment
The bus power source Vbus lines for stopping connecting to the USB interface are powered.
2. the method as described in claim 1, which is characterized in that the data signal line includes data minus DM signal wires and data
Positive DP signal wires；The overcurrent protection information includes default high level signal and the default low level signal；
The terminal is connected in the case where the temperature for determining the USB interface is more than temperature threshold by the USB interface
Data signal line sends overcurrent protection information to the external equipment, including：
The terminal is defeated to the DM signal wires in the case where the temperature for determining the USB interface is more than the temperature threshold
Enter the default high level signal, and the default low level signal is inputted to the DP signal wires.
3. the method as described in claim 1, which is characterized in that the temperature for obtaining the USB interface, including：
The terminal obtains the level of negative temperature coefficient NTC themistor, and carries out analog-to-digital conversion to the level and obtain electricity
Pressure value；The NTC themistor is disposed adjacent with the USB interface；
The terminal determines the temperature of the USB interface according to the voltage value and voltage temperature mapping relations.
4. a kind of terminal USB interface guard method, which is characterized in that including：
External equipment receives the overcurrent protection information of terminal transmission by the data signal line in USB interface connecting line；The USB
Interface connecting line is electrically connected with the USB interface of the terminal；
According to the overcurrent protection information, the bus power source Vbus lines for stopping connecting to the USB interface supply the external equipment
Electricity.
5. method as claimed in claim 4, which is characterized in that the data signal line includes data minus DM signal wires and data
Positive DP signal wires；The overcurrent protection information includes default high level signal and the default low level signal；
According to the overcurrent protection information, the bus power source Vbus lines for stopping connecting to the USB interface supply the external equipment
Electricity, including：
The external equipment receives the default high level signal by the DM signal wires and is connect by the DP signal wires
The default low level signal is received, the bus power source Vbus lines for stopping connecting to the USB interface are powered.
6. a kind of terminal, which is characterized in that including USB interface, temperature monitoring module and processor；The processor respectively with institute
USB interface is stated to connect with the temperature monitoring module；
The temperature monitoring module, for monitoring the temperature of the USB interface；
The processor, for obtaining the temperature of the USB interface in the case of the external external equipment of the USB interface, and
In the case where the temperature of the USB interface is more than temperature threshold, by the data signal line of the connection of the USB interface to institute
It states external equipment and sends overcurrent protection information；The overcurrent protection information is used to indicate the external equipment and stops to the USB
The bus power source line Vbus lines power supply of interface connection.
7. terminal as claimed in claim 6, which is characterized in that the temperature monitoring module includes containing negative temperature coefficient NTC
The detection circuit and analog-digital converter of thermal resistor；
The NTC themistor is disposed adjacent with the USB interface；
The analog-digital converter, is used for：The level of the NTC themistor in the detection circuit is obtained, and to described
Level carries out analog-to-digital conversion and obtains voltage value；
The processor, is used for：According to the voltage value and voltage temperature mapping relations, the temperature of the USB interface is determined.
8. a kind of external equipment, which is characterized in that including power supply adaptor and USB interface connecting line：
The USB interface connecting line, signal is transmitted when being connect for the USB interface with terminal；
The power supply adaptor, is used for：
The overcurrent protection information that data signal line in the USB interface connecting line receives, stops to the USB interface
Bus power source line Vbus is inputted.
9. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage computer instruction,
The computer instruction is used to that computer perform claim to be made to require the method described in 1~3 any claim or the calculating
Machine instructs that the computer perform claim is made to require the method described in 4~5 any claims.
10. a kind of electronic equipment, which is characterized in that including：
Memory, for storing program instruction；
Processor, for calling the program instruction stored in the memory, according to acquisition program perform as claim 1 to
The method of method or execution as described in any claim in claim 4 to 5 in 3 described in any claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057931.3A CN108155623A (en) | 2018-01-22 | 2018-01-22 | A kind of terminal USB interface guard method, terminal and external equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810057931.3A CN108155623A (en) | 2018-01-22 | 2018-01-22 | A kind of terminal USB interface guard method, terminal and external equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108155623A true CN108155623A (en) | 2018-06-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810057931.3A Pending CN108155623A (en) | 2018-01-22 | 2018-01-22 | A kind of terminal USB interface guard method, terminal and external equipment |
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| Country | Link |
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| CN (1) | CN108155623A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110825682A (en) * | 2019-11-05 | 2020-02-21 | 维沃移动通信有限公司 | USB control method and electronic equipment |
| CN111371940A (en) * | 2019-09-24 | 2020-07-03 | 上海南芯半导体科技有限公司 | Method for effectively detecting overheat burning of USB C port of mobile phone |
| CN112531839A (en) * | 2020-12-02 | 2021-03-19 | 深圳慧能泰半导体科技有限公司 | USB cable control device with temperature limitation and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203522138U (en) * | 2013-09-18 | 2014-04-02 | 深圳Tcl新技术有限公司 | USB current foldback circuit and USB power supply device |
| CN205265304U (en) * | 2015-12-30 | 2016-05-25 | 施耐德电气工业公司 | Interface protection device charges |
| CN107209539A (en) * | 2015-01-26 | 2017-09-26 | 罗姆股份有限公司 | Electric supply installation and its control circuit, current-collecting device and its control circuit, electronic equipment and charging adapter, method for detecting abnormality using it |
| CN107331910A (en) * | 2017-06-30 | 2017-11-07 | 北京小米移动软件有限公司 | Charging method and device |
| CN107482736A (en) * | 2017-09-29 | 2017-12-15 | 维沃移动通信有限公司 | A method and electronic equipment for preventing short-circuit burning of USB interface |
-
2018
- 2018-01-22 CN CN201810057931.3A patent/CN108155623A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203522138U (en) * | 2013-09-18 | 2014-04-02 | 深圳Tcl新技术有限公司 | USB current foldback circuit and USB power supply device |
| CN107209539A (en) * | 2015-01-26 | 2017-09-26 | 罗姆股份有限公司 | Electric supply installation and its control circuit, current-collecting device and its control circuit, electronic equipment and charging adapter, method for detecting abnormality using it |
| CN205265304U (en) * | 2015-12-30 | 2016-05-25 | 施耐德电气工业公司 | Interface protection device charges |
| CN107331910A (en) * | 2017-06-30 | 2017-11-07 | 北京小米移动软件有限公司 | Charging method and device |
| CN107482736A (en) * | 2017-09-29 | 2017-12-15 | 维沃移动通信有限公司 | A method and electronic equipment for preventing short-circuit burning of USB interface |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371940A (en) * | 2019-09-24 | 2020-07-03 | 上海南芯半导体科技有限公司 | Method for effectively detecting overheat burning of USB C port of mobile phone |
| CN111371940B (en) * | 2019-09-24 | 2021-10-01 | 上海南芯半导体科技有限公司 | Method for effectively detecting overheat burning of USB C port of mobile phone |
| CN110825682A (en) * | 2019-11-05 | 2020-02-21 | 维沃移动通信有限公司 | USB control method and electronic equipment |
| CN110825682B (en) * | 2019-11-05 | 2022-08-02 | 维沃移动通信有限公司 | USB control method and electronic equipment |
| CN112531839A (en) * | 2020-12-02 | 2021-03-19 | 深圳慧能泰半导体科技有限公司 | USB cable control device with temperature limitation and method |
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Application publication date: 20180612 |