CN104167789A - Method and system for setting charging current in USB data transmission of mobile terminal - Google Patents
Method and system for setting charging current in USB data transmission of mobile terminal Download PDFInfo
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- CN104167789A CN104167789A CN201410393953.9A CN201410393953A CN104167789A CN 104167789 A CN104167789 A CN 104167789A CN 201410393953 A CN201410393953 A CN 201410393953A CN 104167789 A CN104167789 A CN 104167789A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a method and system for setting the charging current in USB data transmission of a mobile terminal. The method includes the following steps that first, the mobile terminal is connected with the charging current through a USB interface, and the number of changes of difference between the voltage of a D+ pin and the voltage of a D- pin of the USB interface in a preset period of time is acquired; second, a charging current value corresponding to the acquired number of changes of difference between the voltage of the D+ pin and the voltage of the D- pin of the USB interface is searched for in a preset current corresponding table; third, the charging current is reset according to the found charging current value. According to the method and system, by acquiring the number of changes of difference between the voltages of the USB pins in the data transmission process, the charging current in the data transmission process is adjusted according to the preset current corresponding table, so that the problem that when the mobile terminal performs USB data transmission, data transmission fails because of unstable voltage is avoided, and stable data transmission is guaranteed while the mobile terminal is charged through the USB.
Description
Technical field
The present invention relates to mobile terminal charging application, charging current method to set up and system while relating in particular to a kind of mobile terminal USB transfer of data.
Background technology
In the prior art, mobile terminal generally connects computer by USB, and is that mobile terminal is downloaded software (being commonly called as " brush machine "), transmission data etc. by computer; Brush machine process often needs a few minutes even for more time, during this period of time needs to keep the electricity condition that has of mobile terminal, if there is the situation of mobile terminal power-off in brush machine process, will cause mobile terminal cannot use (being commonly called as " change brick ").Although meeting automatic charging, carries out brush machine at mobile terminal after current mobile terminal is connected with computer, on USB line, mass data is in the situation that carrying out high-speed transfer, if cause the failure of brush machine just charging current arranges the unreasonable voltage instability that can make; Equally, at mobile terminal and computer, carry out file while copying mutually, if electric current arranges excessively when high-speed transfer file, also can make voltage instability cause file transfer failure.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, charging current method to set up and system while the object of the present invention is to provide a kind of mobile terminal USB transfer of data, cause the problem of data transmission fails due to voltage instability when being intended to solve current mobile terminal and carrying out usb data transmission.
Technical scheme of the present invention is as follows:
Charging current method to set up during mobile terminal USB transfer of data, wherein, said method comprising the steps of:
A, mobile terminal utilize USB interface to connect charging current, and obtain D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time;
B, in default electric stream correspondence table, search the corresponding charging current value of the change frequency poor with D+, the D-pin voltage of obtained USB interface;
C, according to found charging current value, reset charging current.
Charging current method to set up during described mobile terminal USB transfer of data, wherein, described steps A is specially:
Mobile terminal utilizes USB interface to connect after charging current, starts timer, in the predetermined amount of time of timer timing, the D+ of USB interface, the poor change frequency of D-pin voltage is counted.
Charging current method to set up during described mobile terminal USB transfer of data, wherein, in the predetermined amount of time of timer timing, the D+ of USB interface, the poor change frequency of D-pin voltage are counted and be specially:
Utilize predeterminated voltage comparator to produce rising edge or trailing edge according to the D+ of USB interface, the poor variation of D-pin voltage, the rising edge or the trailing edge number of times that in the predetermined amount of time of timer timing, voltage comparator are produced are counted, and obtain count value.
Charging current method to set up during described mobile terminal USB transfer of data, wherein, also comprises before described steps A: the corresponding table of predetermined current, in described electric stream correspondence table, each charging current value is corresponding with a count value scope.
Charging current method to set up during described mobile terminal USB transfer of data, wherein, in described electric stream correspondence table, charging current value corresponding to count value scope that numerical value is larger is less.
Charging current method to set up during described mobile terminal USB transfer of data, wherein, described step B is specially:
Utilize resulting count value in electric stream correspondence table, to search the count value scope at this count value place; And obtain the corresponding charging current value of this count value scope.
Charging current method to set up during described mobile terminal USB transfer of data, wherein, after resetting charging current according to found charging current value in described step C, also comprise: zero clearing count value also makes timer start timing, enters the charging current setting up procedure of next predetermined amount of time.
Charging current during mobile terminal USB transfer of data arranges a system, and wherein, described system comprises:
Counter, utilizes USB interface to connect charging current for mobile terminal, obtains D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time;
Enquiry module, for searching the corresponding charging current value of the change frequency poor with D+, the D-pin voltage of obtained USB interface at default electric stream correspondence table;
Electric current arranges module, for the charging current value finding according to enquiry module, resets charging current.
Charging current during described mobile terminal USB transfer of data arranges system, and wherein, described system also comprises:
Voltage comparator, for producing rising edge or trailing edge according to the D+ of USB interface, the poor variation of D-pin voltage.
Beneficial effect: charging current method to set up and system while the invention provides a kind of mobile terminal USB transfer of data.By obtaining the poor change frequency of USB pin voltage in data transmission procedure, according to default electric stream correspondence table, adjust the charging current in data transmission procedure, while having avoided mobile terminal to carry out usb data transmission, due to voltage instability, cause the problem of data transmission fails, when mobile terminal charges by USB, guarantee the transmission of data stabilization.
Accompanying drawing explanation
Fig. 1 is charging current method to set up flow chart during mobile terminal USB transfer of data in the specific embodiment of the invention.
Fig. 2 is that in the specific embodiment of the invention, charging current during mobile terminal USB transfer of data arranges system principle diagram.
The method flow diagram that charging current when Fig. 3 is system shown in Figure 2 execution mobile terminal USB transfer of data arranges.
Embodiment
Charging current method to set up and system while the invention provides a kind of mobile terminal USB transfer of data, for making object of the present invention, technical scheme and effect clearer, clear and definite, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the charging current method to set up while being illustrated in figure 1 a kind of mobile terminal USB transfer of data, wherein, said method comprising the steps of:
S100, mobile terminal utilize USB interface to connect charging current, and obtain D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time.
Further, the above-mentioned step of obtaining the poor change frequency of D+, the D-pin voltage of USB interface in predetermined amount of time is specially:
Mobile terminal utilizes USB interface to connect after charging current, starts timer, in the predetermined amount of time of timer timing, the D+ of USB interface, the poor change frequency of D-pin voltage is counted.
Utilize predeterminated voltage comparator to produce rising edge or trailing edge according to the D+ of USB interface, the poor variation of D-pin voltage, the rising edge or the trailing edge number of times that in the predetermined amount of time of timer timing, voltage comparator are produced are counted, and obtain count value.
The predetermined amount of time of timer timing, can determine according to actual needs, for example 1 second, as selected shorter predetermined amount of time, can make the voltage difference change frequency obtaining more approach the poor change frequency of actual instantaneous voltage, can reflect more timely transfer of data transient change situation.As select long predetermined amount of time, can better represent the overall condition of transfer of data in a period of time.
When mobile terminal carries out transfer of data, transfer of data can produce certain Weak current, make to form a potential difference between the D+, D-pin of USB interface, produce continuous trickle change in voltage, and the voltage difference of two pins can constantly change along with the carrying out of transfer of data.Between D+, D-pin, the frequency of change in voltage can be in the situation that to a certain degree reflects representative data transmission.Concrete, described default voltage comparator possesses two input IN1, IN2, the corresponding D+ of difference, D-pin, and when the voltage of input IN1 is greater than the voltage of input IN2, output OUT is high level; When the voltage of input IN1 is less than the voltage of input IN2, output OUT is low level, thereby changes at output OUT and form rising edge and trailing edge according to the voltage difference between D+, D-pin.By rising edge and trailing edge are counted, obtain count value, obtain D+, the poor change frequency of D-pin voltage of USB interface.
In specific embodiment, before described step S100, also comprise: the corresponding table of predetermined current.Wherein, in described electric stream correspondence table, each charging current value is corresponding with a count value scope.Concrete, in described electric stream correspondence table, charging current value corresponding to count value scope that numerical value is larger is less.
Described electric stream correspondence table can obtain by great many of experiments summary data.For example: a certain mobile terminal is charged by USB, its charging current is set to Y, then by USB, carry out transfer of data, obtain D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time, and by improving transmission speed, transmission quantity, linear its voltage difference change frequency that promotes.Under Y charging current, when in a certain Preset Time, when voltage difference change frequency surpasses certain numerical value X, when mobile terminal cannot pass through USB stable transfer data, finish experiment.Then reset less charging current, repeat above-mentioned experimental procedure.According to the actual demand to accuracy etc., the variable gradient of adjusting charging current carries out above-mentioned experiment, finally can obtain electric stream correspondence table.Also can be by a certain current value being repeated to experiment, to improve the levels of precision of the critical value of voltage difference change frequency.Thus, the data corresponded manner of described electric stream correspondence table is specially: when change in voltage number of times, i.e. and count value C, while meeting 0≤C<X1, corresponding current value is Y1; When count value C meets X1≤C<X2, corresponding current value is Y2; When count value C meets X2≤C<X3, corresponding current value is Y3; , charging current value corresponding to count value scope that numerical value is larger is less.Thereby guarantee that data can not cause because charging current is excessive bust this in high-speed transfer process.
S200, in default electric stream correspondence table, search the corresponding charging current value of the change frequency poor with D+, the D-pin voltage of obtained USB interface.
In detailed process, in default electric stream correspondence table, according to the count value of counters count, search corresponding charging current value.
Preferably, above-mentioned steps is specially: utilize resulting count value in electric stream correspondence table, to search the count value scope at this count value place, and obtain the corresponding charging current value of this count value scope.
S300, according to found charging current value and reset charging current.
After having reset charging current, mobile terminal charges by newly-installed charging current.
Preferably,, after execution of step S300, zero clearing count value also makes timer restart timing, returns to the charging current setting up procedure that step S100 enters next predetermined amount of time.
Under Timer Controlling, by constantly repeating the above-mentioned process of obtaining change in voltage count value, having realized USB charging current requires to carry out in real time according to transfer of data, dynamically adjust, guaranteed that mobile terminal carries out a large amount of data by USB, during high-speed transfer, can not cause data transmission fails because charging current arranges the excessive voltage instability that causes, cause the serious consequence of brush machine or file transfer failure etc.The above-mentioned renewal frequency that charging current is set can be controlled by the length of described predetermined amount of time, and when predetermined amount of time is longer, the frequency of renewal is lower, can alleviate processor burden, when the scheduled time more in short-term, the frequency of renewal is higher, can better adapt to the variation of transfer of data.Preferably, can according to actual conditions, adjust predetermined amount of time voluntarily by user or system.
In addition, in timer predetermined time section, if when the D+ of the USB interface getting, the poor change frequency of D-pin voltage are zero, count value statistics is 0, without carrying out charging current value, search and charging current setting steps, directly enter the counting of next predetermined amount of time.Because when D+, the poor change frequency of D-pin voltage of USB interface are zero, represent that now mobile phone does not carry out transfer of data, so can not need charging current to reset.
Charging current during mobile terminal USB transfer of data as shown in Figure 2 arranges system, and wherein, described system comprises:
Counter 120, utilizes USB interface to connect charging current for mobile terminal, obtains D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time, and output OUT produces the number of times of rising edge or trailing edge;
Enquiry module 130, for searching the corresponding charging current value of the change frequency poor with D+, the D-pin voltage of obtained USB interface at default electric stream correspondence table;
Electric current arranges module 140, resets the charging current on the VBUS pin of USB interface for the charging current value finding according to enquiry module.
Concrete, described system also comprises:
Voltage comparator 110, for producing rising edge or trailing edge according to the D+ of USB interface, the poor variation of D-pin voltage at output OUT.
As shown in Figure 3, the charging current while utilizing above-mentioned mobile terminal USB transfer of data arranges system and realizes charging current according to the specific embodiment of the real-time method of adjusting of transfer of data demand, the steps include:
S1, mobile terminal utilize USB interface to connect charging current, and startup time-out time is the timer of 1 second.
S2, judge that whether timer is overtime, if so, perform step S3, if not, illustrate not yet overtimely, timer continues timing.
S3, obtain the count value C of counter output, in electric stream correspondence table, search the corresponding current value of this count value C.Counter is exported to enquiry module by the count value C counting in time-out time (1 second), and enquiry module is searched corresponding charging current value according to this count value C in electric stream correspondence table.And the charging current value finding is exported to electric current module is set, and perform step S4.
S4, electric current arrange module corresponding electric current are set, and zero clearing count value C.
Electric current arranges module after obtaining the charging current Value Data of enquiry module transmission, utilizes this charging current value again the charging current on USB interface VBUS pin to be arranged.The count value that counter is added up it is afterwards carried out zero clearing, carries out the count value statistics of next time-out time under the control of timer.
Charging current method to set up and system while the invention provides a kind of mobile terminal USB transfer of data.By obtaining the poor change frequency of USB pin voltage in data transmission procedure, according to default electric stream correspondence table, adjust the charging current in data transmission procedure, while having avoided mobile terminal to carry out usb data transmission, due to voltage instability, cause the problem of data transmission fails, when mobile terminal charges by USB, guarantee the transmission of data stabilization.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (9)
1. charging current method to set up during mobile terminal USB transfer of data, is characterized in that, said method comprising the steps of:
A, mobile terminal utilize USB interface to connect charging current, and obtain D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time;
B, in default electric stream correspondence table, search the corresponding charging current value of the change frequency poor with D+, the D-pin voltage of obtained USB interface;
C, according to found charging current value, reset charging current.
2. charging current method to set up during mobile terminal USB transfer of data according to claim 1, is characterized in that, described steps A is specially:
Mobile terminal utilizes USB interface to connect after charging current, starts timer, in the predetermined amount of time of timer timing, the D+ of USB interface, the poor change frequency of D-pin voltage is counted.
3. charging current method to set up during mobile terminal USB transfer of data according to claim 2, is characterized in that, in the predetermined amount of time of timer timing, the D+ of USB interface, the poor change frequency of D-pin voltage is counted and is specially:
Utilize predeterminated voltage comparator to produce rising edge or trailing edge according to the D+ of USB interface, the poor variation of D-pin voltage, the rising edge or the trailing edge number of times that in the predetermined amount of time of timer timing, voltage comparator are produced are counted, and obtain count value.
4. charging current method to set up during mobile terminal USB transfer of data according to claim 3, it is characterized in that, before described steps A, also comprise: the corresponding table of predetermined current, in described electric stream correspondence table, each charging current value is corresponding with a count value scope.
5. charging current method to set up during mobile terminal USB transfer of data according to claim 4, is characterized in that, in described electric stream correspondence table, charging current value corresponding to count value scope that numerical value is larger is less.
6. charging current method to set up during mobile terminal USB transfer of data according to claim 5, is characterized in that, described step B is specially:
Utilize resulting count value in electric stream correspondence table, to search the count value scope at this count value place; And obtain the corresponding charging current value of this count value scope.
7. charging current method to set up during mobile terminal USB transfer of data according to claim 6, it is characterized in that, after resetting charging current according to found charging current value in described step C, also comprise: zero clearing count value also makes timer start timing, enters the charging current setting up procedure of next predetermined amount of time.
8. charging current during mobile terminal USB transfer of data arranges a system, it is characterized in that, described system comprises:
Counter, utilizes USB interface to connect charging current for mobile terminal, obtains D+, the poor change frequency of D-pin voltage of USB interface in predetermined amount of time;
Enquiry module, for searching the corresponding charging current value of the change frequency poor with D+, the D-pin voltage of obtained USB interface at default electric stream correspondence table;
Electric current arranges module, for the charging current value finding according to enquiry module, resets charging current.
9. charging current during mobile terminal USB transfer of data according to claim 8 arranges system, it is characterized in that, described system also comprises:
Voltage comparator, for producing rising edge or trailing edge according to the D+ of USB interface, the poor variation of D-pin voltage.
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| CN201410393953.9A CN104167789B (en) | 2014-08-12 | 2014-08-12 | Charging current method to set up during the transmission of mobile terminal USB data and system |
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| CN201410393953.9A CN104167789B (en) | 2014-08-12 | 2014-08-12 | Charging current method to set up during the transmission of mobile terminal USB data and system |
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| CN107589820B (en) * | 2017-09-11 | 2020-03-10 | Oppo广东移动通信有限公司 | Mobile terminal, current setting method thereof, and computer-readable storage medium |
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| CN107589819A (en) * | 2017-09-11 | 2018-01-16 | 广东欧珀移动通信有限公司 | Mobile terminal and its current setting method, computer-readable recording medium |
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| CN108108004A (en) * | 2017-12-29 | 2018-06-01 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal and OTG control collocation methods and storage medium |
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