CN107422825A - A kind of CDP mouths charge control method, device, storage medium and electronic equipment - Google Patents
A kind of CDP mouths charge control method, device, storage medium and electronic equipment Download PDFInfo
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- CN107422825A CN107422825A CN201710617348.9A CN201710617348A CN107422825A CN 107422825 A CN107422825 A CN 107422825A CN 201710617348 A CN201710617348 A CN 201710617348A CN 107422825 A CN107422825 A CN 107422825A
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- current
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
Abstract
The invention discloses a kind of CDP mouths charge control method, device, storage medium and electronic equipment, CDP mouth charge control methods include：A, detect connected interface whether be computer CDP mouths：If so, then perform step B；Otherwise identify the type of connected interface and perform corresponding operate；B, stop charging and obtaining the initial voltage on VBUS pin；C, start charging, be incremented by charging current and obtain the current voltage corresponding to each charging current on VBUS pin；When sequentially judging that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding, as final charging current after charging current corresponding to the current voltage is reduced into default stepping.Optimal charging current is obtained under conditions of pressure drop is met, has ensured the stabilization of USB data transmission performance.Solve existing CDP mouths and still configure large current charge more than threshold value in line impedance, the problem of causing pressure drop to cross ambassador's USB data transmission exception.
Description
Technical field
The present invention relates to technical field of mobile terminals, more particularly to a kind of CDP mouths charge control method, device, deposit
Storage media and electronic equipment.
Background technology
At present, gradually popularization is CDP to the USB port on computer（Charging Downstream Port）Mouthful.CDP mouths are one
Special on computers USB port kind is set, and the equipment that can be charged for external needs provides 1.5A high current to be filled
Electricity.With SDP（Standard Downstream Port）Mouth is compared, and CDP mouths can accelerate the charging rate of connected equipment.
But due to the presence of line impedance, contact impedance, USB cable such as USB interface（Connecting line）Wire resistance
It is anti-etc.；During electric current current through line impedance, with the increasing of electric current, the VBUS pin of computer and equipment and the level of GND pin can be caused
Produce pressure drop Vdrop（That is the first pressure drop is produced by line impedance when the VBUS pin of current flow from apparatus flow to the VBUS pin of computer,
When electric current flows out to the GND pin of equipment from the GND pin of computer again the second pressure drop, the first pressure drop and second are produced by line impedance
Pressure drop sum is pressure drop Vdrop）.Vdrop=Icharge*R, wherein, Icharge is charging current, and R is line impedance；Two
Any one becomes big to person, can all cause pressure drop to become big.On two GND pin of the presence of pressure drop, particularly computer and equipment room
Level differences can cause usb communication abnormal, and USB has clear and definite pressure drop thresholding to this.
According to USB2.0 specifications, the pressure drop thresholding of VBUS pin and GND pin is maximum 125mV.Assuming that the 1.5A using CDP mouths
Maximum current charging, then maximum line impedance R=(125+125) mV/1.5A=167m Ω.If use the small cable of impedance（Even
Wiring）, line impedance is met the requirement less than threshold value 167m Ω, then the data transfer of USB port can be protected.But if
The connecting line aging of equipment, or underproof cable is used, there is situation of the line impedance more than 167m Ω, if continuing to configure
Large current charge, pressure drop can be caused excessive and make USB data transmission abnormal.Actual usage scenario is more complicated, USB numbers occurs
During according to transmission abnormality, user does not generally possess professional knowledge and is misinterpreted as being equipment fault.
Thus prior art could be improved and improve.
The content of the invention
In view of in place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of CDP mouths charge control method,
Device, storage medium and electronic equipment, large current charge is still configured more than threshold value in line impedance to solve existing CDP mouths, is led
The problem of causing pressure drop to cross ambassador's USB data transmission exception.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of CDP mouths charge control method, it includes：
Step A, detect connected interface whether be computer CDP mouths：If so, then perform step B；Otherwise connected interface is identified
Type and perform corresponding to operate；
Step B, stop charging and obtaining the initial voltage on VBUS pin；
Step C, start charging, be incremented by charging current and obtain the current voltage corresponding to each charging current on VBUS pin；
When sequentially judging that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding, by the current voltage pair
As final charging current after the default stepping of charging current reduction answered.
In described CDP mouth charge control methods, the step C includes：
Step C1, start charging, constant-current charge is carried out with default charging current, and detect the now current voltage on VBUS pin
Vn, n=1, n are positive integer；
Whether step C2, the absolute value for comparing initial voltage V0 and current voltage Vn difference are more than default pressure drop thresholding：If it is not,
Step C3 is then performed, if so, performing step C4；
Step C3, increase charging current according to default stepping, make the current voltage Vn detected after n+1 now on VBUS pin, return
Step C2；
Step C4, increase charging current is stopped, as final charging current after current charging current is reduced into default stepping.
In described CDP mouth charge control methods, the default pressure drop thresholding is 250mV, and it is 100mA to preset stepping.
In described CDP mouth charge control methods, after the step C, in addition to：
Step D, judge whether final charging current is less than reference current, if then prompting user data line abnormal or connecting not
It is good, otherwise charged with final charging current.
It is a kind of realize described in CDP mouth charge control methods device, it includes：
Detection module, detect connected interface whether be computer CDP mouths；
Stopping modular, when to detect connected interface be CDP mouths, stopping charging simultaneously obtains the initial voltage on VBUS pin；
Processing module, start charging, be incremented by charging current and obtain the current electricity corresponding to each charging current on VBUS pin
Pressure；When sequentially judging that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding, by the current electricity
As final charging current after the default stepping of charging current reduction corresponding to pressure；
Operation module, when to detect connected interface be not CDP mouths, identify the type of connected interface and operate corresponding to performing.
In described device, module is also included validating that, judges whether final charging current is less than reference current, if then
User data line exception or bad connection are prompted, is otherwise charged with final charging current.
A kind of non-transient computer readable storage medium storing program for executing, is stored with computer executable instructions, and the computer can perform
Instruction is arranged to carry out described charge control method.
A kind of electronic equipment, including：
At least one processor；And
The memory being connected with least one processor communication；Wherein,
The memory storage has can be by the instruction of at least one computing device, and the instruction is by least one place
Manage device to perform, so that the charge control method described at least one computing device.
Compared to prior art, CDP mouths charge control method, device, storage medium and electronic equipment provided by the invention,
CDP mouth charge control methods include：Step A, detect connected interface whether be computer CDP mouths：If so, then perform step
B；Otherwise identify the type of connected interface and perform corresponding operate；B, stop charging and obtaining the initial electricity on VBUS pin
Pressure；C, start charging, be incremented by charging current and obtain the current voltage corresponding to each charging current on VBUS pin；Sequentially sentence
When the absolute value for the difference broken to an initial voltage and current voltage is more than default pressure drop thresholding, it will be filled corresponding to the current voltage
As final charging current after the default stepping of electric current reduction.Optimal charging current is obtained under conditions of pressure drop is met,
The stabilization of USB data transmission performance is ensured.Solve existing CDP mouths and still configure high current more than threshold value in line impedance and fill
Electricity, the problem of causing pressure drop to cross ambassador's USB data transmission exception.
Brief description of the drawings
Fig. 1 is CDP mouths charge control method flow chart provided by the invention.
Fig. 2 is the schematic diagram of device Application Example provided by the invention.
Fig. 3 is the hardware architecture diagram of electronic equipment provided by the invention.
Embodiment
The present invention provides a kind of CDP mouths charge control method, device, storage medium and electronic equipment.To make the present invention's
Object, technical solution and advantage are clearer, clear and definite, the embodiment that develops simultaneously referring to the drawings to the present invention further specifically
It is bright.It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
As shown in figure 1, CDP mouths charge control method provided by the invention includes：
S100, electronic equipment detect connected interface whether be computer CDP mouths：If so, then perform step S200；Otherwise identify
The type of connected interface simultaneously performs corresponding operate；
S200, stop charging and obtaining the initial voltage on VBUS pin；
S300, start charging, be incremented by charging current and obtain the current voltage corresponding to each charging current on VBUS pin；Press
It is when sequence judges that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding, the current voltage is corresponding
Charging current reduce after default stepping as final charging current.
In the present embodiment, the charge control method is performed by electronic equipment.The electronic equipment such as smart mobile phone, flat board
Computer, charger baby etc..Electronic equipment is connected by the interface of USB data line and computer.Based on also other kinds of on computer
Interface（Mainly USB interface）, therefore, when electronic equipment is connected with computer, need to first detect whether connected interface is CDP
Mouthful.The detection method of CDP mouths is prior art, is not described further herein.
If CDP mouths, then it represents that to carry out large current charge, need to consider the influence of pressure drop thresholding, perform step S200 ~
S300.If not CDP mouths, the then operation according to corresponding to performing the type of the interface identified；USB interface in this way, can be further
It is as main equipment or slave unit, then data transfer or charging corresponding to progress to judge electronic equipment.
In order to obtain actual pressure drop, the present embodiment difference with the prior art is, CDP mouths are connected in electronic equipment
When, first stop charging in step S200；Because stopping charging at the very start, now no charging current causes pressure drop,
It may also be 0V that initial voltage on VBUS pin, which may have low voltage value,（Have with the technique and type of the USB interface of electronic equipment
Close）, obtain calculating bases of the initial voltage V0 on the VBUS pin of electronic equipment as pressure drop.
When electronic equipment connects CDP mouths, it need to be charged with admissible maximum charging current, but the charging current stream
Cross data wire（Equivalent to line impedance）Pressure drop caused by Shi Shiji need to be less than default pressure drop thresholding（250mV）.Therefore, described
In step S300, a charging current need to be found out, its flow through the absolute value of voltage caused by data wire and initial voltage V0 difference,
Closest to default pressure drop thresholding but less than default pressure drop thresholding, this is only can configure maximum and is not in data transfer
Abnormal charging current.
It is incremental to increase charging current by default stepping every time in the step S300.Sequentially judge i.e. according to increased
Order judges.Often increase a charging current, just obtain its corresponding current voltage, judge an initial voltage and current voltage
The absolute value of difference whether be more than default pressure drop thresholding.Less than charging current is then increased again, obtain work as corresponding to it again
Preceding voltage, judges whether the absolute value of the difference of initial voltage and current voltage is more than default pressure drop thresholding again, by that analogy.
Then the step S300 is specifically included：
Step 310, start charging, constant-current charge is carried out with default charging current, and detect the now current electricity on VBUS pin
Vn is pressed, n=1, n are positive integer；
In the present embodiment, charging current 100mA, in the specific implementation, may be configured as other values, as 150mA, 200mA or its
He is worth, and is not construed as limiting herein.
Whether step 320, the absolute value for the difference for comparing initial voltage V0 and current voltage Vn are more than default pressure drop thresholding：
If it is not, step 330 is then performed, if so, performing step 340；
The absolute value of the difference is the pressure drop that 100mA charging current is formed in line impedance, if being advised less than USB2.0
The default pressure drop thresholding of model requirement（250mV）, expression can also increase charging current and continue to compare, that is, perform step 330.It is if big
In default pressure drop thresholding, then it represents that charging current can not be further added by, step 340 is performed and select optimal charging current.
Step 330, according to default stepping increase charging current, make the current voltage Vn detected after n+1 now on VBUS pin,
Return to step 320.
The default stepping can be 50mA, 100mA, 200mA etc..The charging current default stepping of increase every time.It is preferably, pre-
If stepping is 100mA, the value is not in front and rear charging current mutation（Change greatly）, avoid | V0-V1 | value compare 250mV
It is excessive to directly affect USB data transmission.The charging current of first time is 100mA, corresponding current voltage V1.In step 320
Compare | V0-V1 | value whether be more than 250mV：If being less than, perform step 330 and charging current is increased into 200mA, and detect
The now current voltage V2 on VBUS pin, returns again to step 320 and compares | V0-V2 | value whether be more than 250mV, if still less than
250mV, then return to execution step 330 and charging current increased into 300mA, and detect the now current voltage V3 on VBUS pin,
Step 320 is returned again to compare | V0-V3 | value whether be more than 250mV, by that analogy, continue increasing according to 100mA stepping and fill
Electric current, until | V0-Vn |>250mV, perform step 340.
Step 340, increase charging current is stopped, as final charging after current charging current is reduced into default stepping
Electric current.
If | V0-Vn |>250mV, then it represents that the charging current exceedes pressure drop thresholding, it is impossible to continues to increase, while also needs
Reduce the charging current, just finding out for so obtaining meets that line drop is less than 250mV, current value and maximum charging electricity
Stream.This charging current is configured to be charged.
In further embodiment, after the step S300, in addition to：Judge whether final charging current is less than base
Quasi- electric current, if then prompting user data line exception or bad connection, otherwise charged with final charging current.
If final charging current is smaller, such as less than 1A reference current could meet drop requirements, now charge
Speed is slower, extends the charging interval, understands charge condition in order to facilitate user, data wire used in user can be prompted bad
（It is probably aging or unqualified）Or bad connection causes charging current current limliting, carry out fault cues can improve electronic equipment with
Friendliness between user.
Based on above-mentioned CDP mouth charge control methods, the present invention also provides a kind of device of CDP mouths, also referring to figure
2, device is set in the electronic device, is connected with USB interface, is connected by the CDP mouths of USB data line and computer, described device
Including：
Detection module 10, for detect connected interface whether be computer CDP mouths.
When stopping modular 20 for detecting connected interface is CDP mouths, stopping charging simultaneously obtains the initial electricity on VBUS pin
Pressure.
Processing module 30, charged for starting, be incremented by charging current and obtain VBUS pin corresponding to each charging current
On current voltage；When sequentially judging that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding,
As final charging current after charging current corresponding to the current voltage is reduced into default stepping.
When operation module 40 for detecting connected interface is not CDP mouths, identifies the type of connected interface and perform pair
The operation answered.
In further embodiment, described device also includes：Module 50 is confirmed, for judging whether final charging current is small
In reference current, if then prompting user data line exception or bad connection, otherwise charged with final charging current.
Present invention also offers a kind of non-transient computer readable storage medium storing program for executing, computer executable instructions are stored with, institute
State the charge control method that computer executable instructions are arranged to carry out in above-described embodiment.
Present invention also offers the hardware architecture diagram of a kind of electronic equipment.The electronic equipment can perform corresponding side
Method step.As shown in figure 3, the electronic equipment（Such as smart mobile phone）Including：
At least one processor（processor）In 60, Fig. 3 by taking a processor 60 as an example；Display screen 61；And memory
（memory）62, communication interface can also be included（Communications Interface）63 and bus 64.Wherein, processor
60th, display screen 61, memory 62 and communication interface 63 can complete mutual communication by bus 64.Display screen 61 is arranged to
Show that default user guides interface and prompting user data line exception or bad connection in initial setting mode.Communication interface 63
Information can be transmitted.Processor 60 can call the logical order in memory 62, to perform the method in above-described embodiment.
In addition, the logical order in above-mentioned memory 62 can be realized by the form of SFU software functional unit and is used as solely
Vertical production marketing in use, can be stored in a computer read/write memory medium.
Memory 62 is used as a kind of computer-readable recording medium, may be configured as storage software program, computer can perform
Program, programmed instruction or module as corresponding to the method in the embodiment of the present disclosure.Processor 60 is stored in memory by operation
Software program, instruction or module in 62, so as to perform function application and data processing, that is, realize the side in above-described embodiment
Method.
Memory 62 may include storing program area and storage data field, wherein, storing program area can storage program area, extremely
Application program needed for few One function；Storage data field can store uses created data etc. according to terminal device.This
Outside, memory 62 can include high-speed random access memory, can also include nonvolatile memory.
The all or part of step of above-described embodiment can be completed by hardware, can also instruct correlation by program
Hardware complete, the program can be stored in a computer-readable recording medium, and storage medium can be that non-transient storage is situated between
Matter, including USB flash disk, mobile hard disk, read-only storage（Read-Only Memory, ROM）, random access memory（Random
Access Memory, RAM）, disk or CD etc. are a variety of to be stored with the medium of store program codes or transient state
Medium.
In summary, CDP mouths charge control method, device, storage medium and electronic equipment of the invention, in connection CDP
First stop the initial voltage on charging acquisition VBUS pin during mouth, restart charging, find out one by charging current incremental manner and fill
Electric current, it flows through the absolute value of the difference of voltage caused by data wire and initial voltage, closest to default pressure drop thresholding but
Less than default pressure drop thresholding, charging current that is being just configured to maximum and being not in data transmission exception.So no matter use
How is the line impedance of family usage scenario, and electronic equipment can automatically configure out most rational charging current, is ensureing to meet pressure
Under conditions of drop, the stabilization of USB data transmission performance has been ensured.Electronic equipment is set to tackle various usage scenarios, it is both fully sharp
With the high current ability of USB CDP mouths, data transmission performance is ensured again, strengthens the compatibility of CDP mouths charging.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (8)
- A kind of 1. CDP mouths charge control method, it is characterised in that including：Step A, detect connected interface whether be computer CDP mouths：If so, then perform step B；Otherwise connected interface is identified Type and perform corresponding to operate；Step B, stop charging and obtaining the initial voltage on VBUS pin；Step C, start charging, be incremented by charging current and obtain the current voltage corresponding to each charging current on VBUS pin； When sequentially judging that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding, by the current voltage pair As final charging current after the default stepping of charging current reduction answered.
- 2. CDP mouths charge control method according to claim 1, it is characterised in that the step C includes：Step C1, start charging, constant-current charge is carried out with default charging current, and detect the now current voltage on VBUS pin Vn, n=1, n are positive integer；Whether step C2, the absolute value for comparing initial voltage V0 and current voltage Vn difference are more than default pressure drop thresholding：If it is not, Step C3 is then performed, if so, performing step C4；Step C3, increase charging current according to default stepping, make the current voltage Vn detected after n+1 now on VBUS pin, return Step C2；Step C4, increase charging current is stopped, as final charging current after current charging current is reduced into default stepping.
- 3. CDP mouths charge control method according to claim 2, it is characterised in that the default pressure drop thresholding is 250mV, it is 100mA to preset stepping.
- 4. CDP mouths charge control method according to claim 1, it is characterised in that after the step C, in addition to：Step D, judge whether final charging current is less than reference current, if then prompting user data line abnormal or connecting not It is good, otherwise charged with final charging current.
- A kind of 5. device for the CDP mouth charge control methods realized described in claim 1, it is characterised in that including：Detection module, detect connected interface whether be computer CDP mouths；Stopping modular, when to detect connected interface be CDP mouths, stopping charging simultaneously obtains the initial voltage on VBUS pin；Processing module, start charging, be incremented by charging current and obtain the current electricity corresponding to each charging current on VBUS pin Pressure；When sequentially judging that the absolute value of the difference to an initial voltage and current voltage is more than default pressure drop thresholding, by the current electricity As final charging current after the default stepping of charging current reduction corresponding to pressure；Operation module, when to detect connected interface be not CDP mouths, identify the type of connected interface and operate corresponding to performing.
- 6. device according to claim 5, it is characterised in that also include validating that module, judge that final charging current is It is no to be less than reference current, if then prompting user data line exception or bad connection, otherwise filled with final charging current Electricity.
- 7. a kind of non-transient computer readable storage medium storing program for executing, being stored with computer executable instructions, the computer is executable to be referred to Order is arranged to carry out the charge control method in claim 1-4 described in any one.
- 8. a kind of electronic equipment, including：At least one processor；AndThe memory being connected with least one processor communication；Wherein,The memory storage has can be by the instruction of at least one computing device, and the instruction is by least one place Manage device to perform, so that the charge control method at least one computing device claim 1-4 described in any one.
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| CN111697672A (en) * | 2020-07-20 | 2020-09-22 | 广州极飞科技有限公司 | Charging control method, charging control device, charging device, and storage medium |
| CN112421700A (en) * | 2019-08-22 | 2021-02-26 | 中兴通讯股份有限公司 | Charging method, terminal and computer readable storage medium |
| CN116203307B (en) * | 2023-02-28 | 2024-03-12 | 无锡宇宁智能科技有限公司 | Terminal Type-C interface foreign matter detection method, device and storage medium |
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Application publication date: 20171201 |