CN107643998A - OTG and the difunctional system that charges are realized based on intelligent object - Google Patents
OTG and the difunctional system that charges are realized based on intelligent object Download PDFInfo
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- CN107643998A CN107643998A CN201710801156.3A CN201710801156A CN107643998A CN 107643998 A CN107643998 A CN 107643998A CN 201710801156 A CN201710801156 A CN 201710801156A CN 107643998 A CN107643998 A CN 107643998A
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Abstract
OTG and the difunctional system that charges are realized based on intelligent object the invention discloses a kind of, including intelligent object, switching circuit, adapter input and USB port, intelligent object includes USB functional units, Charge Management unit, GPIO pins, intelligent object obtains the device type of connection according to USB, show that adapter and OTG slave units coexist detecting USB power pins when low level is changed into high level and USB ID pins are changed into low level from high level, now intelligent object GPIO pins are just arranged to high level control switching circuit using adapter as the power supply of intelligent object and charged and by the power supply of intelligent object to OTG slave units power, so as to realize OTG and charge difunctional.The present invention is kept completely separate to realize OTG and charge difunctional by switching circuit by adapter and the power supply hardware separation of OTG slave units, and with software flow control switching circuit realization.
Description
Technical field
It is more particularly to a kind of that OTG is realized based on intelligent object and charged difunctional the present invention relates to smart machine field
System.
Background technology
Using OTG, (On the Go, are mainly used between a variety of equipment or mobile device existing intelligent terminal
Connection, carry out data exchange) slave unit, intelligent terminal be just host (main equipment), and charge when intelligent terminal be
Device (slave unit), cause intelligent terminal not support to charge when using OTG slave units, or charging when do not support OTG from
Equipment, but increasing client needs also be charged when intelligent terminal is as host, to ensure that equipment exists
It is unlikely to battery during continuous use to exhaust and shut down.
The content of the invention
The technical problem to be solved in the present invention be in order to overcome in the prior art intelligent terminal using OTG slave units when not
The defects of supporting charging, or OTG slave units not supported in charging, there is provided a kind of to realize that OTG and charging are double based on intelligent object
The system of function.
The present invention is that solve above-mentioned technical problem by following technical proposals：
It is a kind of that OTG and the difunctional system that charges are realized based on intelligent object, it is characterized in, including intelligent object, switching
Circuit, adapter input and USB port, the intelligent object include USB functional units, Charge Management unit, GPIO pins,
The USB functional units include USB power pins, usb data anode pin, usb data negative terminal pin, USB ID pins, institute
Stating Charge Management unit includes power pin, and the switching circuit includes first port, second port, the 3rd port and control terminal
Mouthful, the USB port is used to connect OTG slave units, and the adapter input is used to connect adapter, and the power pin connects
Connect the power supply of the intelligent object；
The usb data anode pin, the usb data negative terminal pin, the USB ID pins and the USB port phase
Should connect, the adapter input is connected with the first port, the USB power pins respectively, the GPIO pins with
The control port connection, the power end of the USB port are connected with the second port, the power pin and the described 3rd
Port connects；
Detect that the USB power pins are changed into high level and the intelligent object from low level in the intelligent object
When detecting that the USB ID pins are changed into low level from high level, the GPIO pins are arranged to high electricity by the intelligent object
Put down for controlling the switching circuit to disconnect the second port and the first port and by the second port and institute
The conducting of the 3rd port is stated, the intelligent object obtains power supply by the USB power pins from the adapter input, and
The Charge Management unit is charged by the power pin to the power supply of the intelligent object and the intelligent object
Power supply powered by the switching circuit to the OTG equipment, the intelligent object passes through the positive pole pipe of the usb data
Pin, the usb data negative pole pin and the OTG slave units complete data exchange.
In this programme, the USB functional units realize USB functions for the intelligent object, such as described when being linked into
When the equipment of USB port is OTG slave units, according to USB, at this moment OTG slave units just drag down the USB ID pins, make
Obtaining the intelligent object turns into host, and OTG functions are can be achieved with by built-in software, and works as and be linked into the USB port
When equipment is main equipment such as PC (PC), according to USB, main equipment is by the usb data anode pin and the USB
Data minus end pipe pin is shorted together and make it that level difference is not present in the two pins, and at this moment the intelligent object is with regard to conduct
Device, USB chargings can be achieved with by built-in software and/or data communicate, and such as when the USB power pins access
Outside power supply becomes high level if pin level when adapter by low level, and according to USB, the intelligent object is with regard to energy
Know that the USB power pins have accessed external power source, at this moment the intelligent object just obtains power supply from the external power source, and leads to
The Charge Management unit is crossed to charge to the power supply of the intelligent object.Therefore, detected in the intelligent object
The USB power pins are changed into high level from low level and the intelligent object detects the USB ID pins by high level
When being changed into low level, i.e., described intelligent object, which detects, not only have been accessed external power source but also has accessed OTG slave units, at this moment the intelligence
The GPIO pins are just arranged to high level by energy module, on the one hand external power source are used for described by the switching circuit
Intelligent object is powered and the power supply such as battery of the intelligent object is filled by the Charge Management unit
Fulgurite is managed, and on the other hand causes the switching circuit that the power supply of the intelligent object is powered to OTG slave units, at this moment institute
State intelligent object and data exchange completed by the usb data positive pole pin, the usb data negative pole pin and OTG slave units,
So as to which the intelligent object is achieved that coexisting for OTG functions and charge function.
It is preferred that detect that the USB power pins, the usb data negative terminal pin are low in the intelligent object
Level state and when the usb data anode pin, the USB ID pins are high level, the intelligent object will described in
GPIO pins default setting is low level, and the switching circuit includes first resistor, second resistance, the first triode, the two or three
Pole pipe and PMOS, the drain electrode of the PMOS are used to being used as the first port, the source electrode of the PMOS respectively with it is described
Be used as the second port after first resistor one end, the connection of described second resistance one end, the grid of the PMOS respectively with institute
State the colelctor electrode connection of the first resistor other end, first triode, the grounded emitter of first triode, described the
Colelctor electrode of the base stage of one triode respectively with the second resistance other end, the second triode is connected, second triode
Grounded emitter, the base stage of second triode is as the control port.
In this programme, the switching circuit utilizes metal-oxide-semiconductor (insulating gate type field effect tube), the switching characteristic of triode, and
It is that the vacant state setting GPIO pins are low level according to the adapter input and the USB port, so as to protect
Card is described to be realized OTG based on intelligent object and charges difunctional system on the basis of being coexisted with OTG functions and charge function,
Still there is complete, independent OTG functions and charge function, i.e., it is described when individually the adapter input connects adapter
OTG is realized based on intelligent object and charge difunctional system just can charge independence, individually the USB port access OTG from setting
The intelligent object is just used as device when OTG communications or individually the USB port access main equipment just can be independently carried out when standby
Realize communication.Certainly, while OTG slave units and adapter are accessed, it is described that OTG is realized based on intelligent object and charged difunctional
System just has OTG functions and charge function simultaneously.
It is preferred that the Charge Management unit also includes supply voltage detection pin, supply voltage detection pin with
The power supply connection of the intelligent object, when the Charge Management unit detects that the power supply of the intelligent object is to fill
During full power state, the Charge Management unit stops charging to the power supply of the intelligent object by the power pin.
In this programme, by monitor the intelligent object power supply state of charge so as to deciding whether to continue to fill
Electricity, further improve reliability and security.
It is preferred that the switching circuit also includes 3rd resistor, described 3rd resistor one end and second triode
Base stage connection, other end ground connection.
It is preferred that the switching circuit also includes mu balanced circuit, the mu balanced circuit also includes Enable Pin, the Enable Pin
It is connected with the control port, the input of the mu balanced circuit is the 3rd port, and the output end of the mu balanced circuit is
The second port, the Enable Pin are high level effective for controlling the mu balanced circuit by the power supply electricity of the intelligent object
Exported after the voltage stabilizing of source by the second port.
In this programme, cause the power supply of the intelligent object and the OTG slave units using the mu balanced circuit
Power supply requirement matched further to improve the use that OTG and the difunctional system that charges are realized based on intelligent object
Flexibility.Wherein, the mu balanced circuit typically uses voltage stabilizing chip as core devices, in view of in existing application, intelligent object
Operating voltage range be usually 3.5V-4.2V, and the supply voltage of OTG slave units is usually 5V, i.e., described intelligent object
The magnitude of voltage of power supply is less than the power supply requirement of the OTG slave units, so the mu balanced circuit just uses booster type voltage stabilizing
Chip.
It is preferred that the mu balanced circuit also includes diode, the output end of the mu balanced circuit and the sun of the diode
Pole connects, and the negative electrode of the diode is as the second port.In this programme, protected using the one-way conduction characteristic of diode
The mu balanced circuit is protected, improves circuit reliability and security.
The positive effect of the present invention is：The present invention is by increasing input of the switching circuit by external adapter power supply
Power supply with OTG slave units carries out hardware separation, and passes through GPIO (General Purpose Input with reference to software flow
Output, universal input/output) Interface Controller switching circuit, so as to realize the input of external adapter power supply and OTG slave units
Power supply be kept completely separate so that smart machine supports OTG slave units and charge function simultaneously.
Brief description of the drawings
Fig. 1 is the schematic diagram that the OTG systems difunctional with charging is realized based on intelligent object of present pre-ferred embodiments.
Fig. 2 is that being realized based on intelligent object for present pre-ferred embodiments is soft built in the OTG systems difunctional with charging
The schematic flow sheet of part.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Apply among a scope.
As shown in Figure 1-2, what the present embodiment was related to realizes OTG and the difunctional system that charges based on intelligent object, including
Intelligent object 1, switching circuit 2, adapter input 3 and USB port 4, the intelligent object 1 include USB functional units 11, filled
Electric administrative unit 12, GPIO pins, the USB functional units 11 include USB power pins USB_VBUS, the positive end pipe of usb data
Pin USB_DP, usb data negative terminal pin USB_DN, USB ID pins USB_ID, the Charge Management unit 12 include power supply and managed
Pin VBAT, the switching circuit 2 include first port 21, second port 22, the 3rd port 23 and control port 24, the USB
Port 4 is used to connect OTG slave units, and the adapter input 3 is used to connect adapter, the power pin VBAT connections institute
State the power supply 5 of intelligent object；
The usb data anode pin USB_DP, the usb data negative terminal pin USB_DN, the USB ID pins
USB_ID is corresponding to the USB port 4 to be connected, and the adapter input 3 supplies with the first port 21, the USB respectively
The USB_VBUS connections of fulgurite pin, the GPIO pins are connected with the control port 24, the power end of the USB port 4 and institute
State second port 22 to connect, the power pin VBAT is connected with the 3rd port 23；
The USB power pins USB_ is detected according to embedded software flow (as shown in Figure 2) in the intelligent object 1
VBUS is changed into high level from low level and the intelligent object 1 detects that the USB ID pins USB_ID is changed into from high level
During low level, the GPIO pins are arranged to high level and are used to control the switching circuit 2 by described the by the intelligent object 1
Two-port netwerk 22 disconnects with the first port 21 and turned on the second port 22 and the 3rd port 23, the intelligence
Module 1 obtains power supply, and the Charge Management by the USB power pins USB_VBUS from the adapter input 3
Unit 12 is charged by the power supply 5 of the power pin VBAT to the intelligent object 1 and the confession of the intelligent object 1
Power supply 5 is powered by the switching circuit 2 to the OTG slave units (not identifying the OTG slave units in Fig. 1), described
Intelligent object 1 is by the usb data positive pole pin USB_DP, the usb data negative pole pin USB_DN and OTG from setting
It is standby to complete data exchange.In the present embodiment specific implementation, the generally preferably battery of power supply 5 of the intelligent object 1, such as lithium
Battery, and can be that single lithium battery or binodal lithium battery parallel with one another, the voltage of single lithium battery are generally 4.2V；Institute
Stating intelligent object 1 includes intelligent chip, such as directly preferred core of the high pass msm8909 platforms as the intelligent object, should
Platform includes the functional units such as USB, Charge Management, so when the equipment for being linked into the USB port 4 is OTG slave units,
According to USB, at this moment OTG slave units just drag down the USB ID pins USB_ID so that the intelligent object 1 turns into
Host, OTG functions can be achieved with by built-in software, and when the equipment that be linked into the USB port 4 is main equipment (in Fig. 1
Do not identify main equipment) such as PC (PC) when, according to USB, main equipment is by the usb data anode pin USB_DP
It is shorted together with the usb data negative terminal pin USB_DN and make it that level difference is not present in the two pins, at this moment the intelligence
Energy module 1 is just used as device, can be achieved with USB chargings by built-in software and/or data communicate, and such as when described
Power supply outside USB power pins USB_VBUS accesses becomes high level if pin level when adapter by low level, according to
USB, the intelligent object is with regard to that can know that the USB power pins USB_VBUS has accessed external power source, the at this moment intelligence
Energy module 1 just obtains power supply from the external power source, and passes through power supply electricity of the Charge Management unit 12 to the intelligent object 1
Charged in source 5.Therefore, detect that the USB power pins USB_VBUS is changed into high electricity from low level in the intelligent object 1
When flat and described intelligent object 1 detects that the USB ID pins USB_ID is changed into low level from high level, i.e., described intelligence
Module 1, which detects, not only have been accessed external power source but also has accessed OTG slave units, and at this moment the intelligent object 1 just manages the GPIO
Pin is arranged to high level, on the one hand causes the switching circuit 2 to be used to be powered simultaneously the intelligent object 1 by external power source
Charge Management is carried out to the power supply 5 of the intelligent object 1 by the Charge Management unit 12, on the other hand caused described
Switching circuit 2 powers the power supply 5 of the intelligent object 1 to OTG slave units, and at this moment the intelligent object 1 is by described
Usb data positive pole pin USB_DP, usb data negative pole pin USB_DN and the OTG slave unit complete data exchange, so as to institute
State intelligent object and be achieved that coexisting for OTG functions and charge function.
Further, in the present embodiment, the USB power pins USB_VBUS, described is detected in the intelligent object 1
Usb data negative terminal pin USB_DM is low level state and the usb data anode pin USB_DP, the USB ID pins
When USB_ID is high level, the GPIO pins default setting is low level by the intelligent object 1, the switching circuit 2
Including first resistor R1, second resistance R2, the first triode Q2, the second triode Q3 and PMOS Q1, the PMOS Q1's
Drain for being used as the first port 21, the source electrode of the PMOS Q1 respectively with described first resistor R1 one end, described the
The second port 22 is used as after the connection of two resistance R2 one end, and the grid of the PMOS Q1 is another with the first resistor R1 respectively
One end, the colelctor electrode connection of the first triode Q2, the grounded emitter of the first triode Q2, first triode
Colelctor electrode of the Q2 base stage respectively with the second resistance R2 other ends, the second triode Q3 is connected, the second triode Q3
Grounded emitter, the base stage of the second triode Q3 is as the control port 24.When it is implemented, by built-in soft
Part flow is that the vacant state setting GPIO pins are low level according to the adapter input and the USB port,
OTG is realized so as to ensureing described based on intelligent object and the difunctional system that charges coexists with OTG functions and charge function
On the basis of, still with complete, independent OTG functions and charge function, i.e., individually the adapter input 3 connects adapter
When, described to realize OTG and the difunctional system just energy charge independence that charges based on intelligent object, the independent USB port 4 accesses
The intelligent object 1 is just made when OTG communications or the individually access of USB port 4 main equipment just can be independently carried out during OTG slave units
Realize and communicate for device.Certainly, while OTG slave units and adapter are accessed, it is described that OTG and charging are realized based on intelligent object
Difunctional system just has OTG functions and charge function simultaneously.In specific implementation, the switching circuit 2 also includes the 3rd electricity
R3 is hindered, described 3rd resistor R3 one end is connected with the base stage of the second triode Q3, other end ground connection.
Further, in the present embodiment, the Charge Management unit 12 also includes supply voltage detection pin BAT_SNS,
The supply voltage detection pin BAT_SNS is connected with the power supply 5 of the intelligent object 1, when the Charge Management unit
12 when to detect the power supply 5 of the intelligent object 1 be full of electricity condition, and the Charge Management unit 12 stops by described
The power supply 5 of power pin BAT_SNS to the intelligent object 1 charges.
Further, in the present embodiment, the switching circuit 1 also includes mu balanced circuit 25, and the mu balanced circuit also includes
Enable Pin EN, the mu balanced circuit 25 generally preferably core devices of the voltage stabilizing chip 251 as mu balanced circuit, the mu balanced circuit
25 also include diode D1, and the output end of the mu balanced circuit 25 is connected with the anode of the diode D1, the diode D1
Negative electrode be connected as the second port 22, the Enable Pin EN with the control port 24, the mu balanced circuit 25 it is defeated
It is the 3rd port 23 to enter end, and the output end of the mu balanced circuit 25 is the second port 22, and the Enable Pin EN is height
Level is effective for controlling the mu balanced circuit 25 to pass through second end after the voltage stabilizing of power supply 5 of the intelligent object 1
Mouth 22 exports.In specific implementation, the operating voltage range of intelligent object is usually 3.5-4.2V, and the power supply of OTG slave units is
5V, i.e., the magnitude of voltage of the power supply of described intelligent object are less than the power supply requirement of the OTG slave units, therefore just using boosting
Type mu balanced circuit.
As shown in Fig. 2 the present embodiment be related to OTG realized based on intelligent object and charged soft built in difunctional system
Part flow includes：Whether vacantly intelligent object 1 described first detects the USB port 4 according to USB, such as the intelligence
Module 1 detect the USB power pins USB_VBUS, the usb data negative terminal pin USB_DM be low level state and
The usb data anode pin USB_DP, the USB ID pins USB_ID indicate that the USB port 4 when being high level
For vacant state；Then, if first detecting, the USB port 4 is connected to equipment, according to USB, passes through the USB ID
Pin USB_ID, the usb data anode pin USB_DP, the usb data negative terminal pin USB_DM come identify be OTG from
Equipment or main equipment, if the level of the USB ID pins USB_ID is just OTG slave units by high step-down, otherwise set with regard to based on
It is standby further to have discriminated whether adapter insertion so as to which the intelligent object 1 is just used as device, that is, judge that the USB is supplied
Whether fulgurite pin USB_VBUS level is uprised by low, if at this moment adapter and OTG slave units coexist, performs OTG and charging
Function, if only OTG slave units, only perform OTG functions；If first detecting, the adapter input 3 is connected to adaptation
Device, that is, detect whether the level of the USB power pins USB_VBUS by low uprise shows that the adapter input 3 connects
Adapter, then further judge whether the USB port 4 connects equipment, i.e., according to USB, pass through the USB ID
Pin USB_ID, the usb data anode pin USB_DP, the usb data negative terminal pin USB_DM come identify be OTG from
Equipment or main equipment, if OTG slave units, if at this moment adapter and OTG slave units coexist, perform OTG and the work(of charging
Can, if only adapter, only performs charge function；When the USB port 4 and the adapter input 3 are hanging shape
State, then flow be constantly in the state of starting waiting for.
Although the embodiment of the present invention is the foregoing described, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
On the premise of the principle and essence of the present invention, various changes or modifications can be made to these embodiments, but these changes and
Modification each falls within protection scope of the present invention.
Claims (6)
1. a kind of realize OTG and the difunctional system that charges based on intelligent object, it is characterised in that including intelligent object, switching
Circuit, adapter input and USB port, the intelligent object include USB functional units, Charge Management unit, GPIO pins,
The USB functional units include USB power pins, usb data anode pin, usb data negative terminal pin, USB ID pins, institute
Stating Charge Management unit includes power pin, and the switching circuit includes first port, second port, the 3rd port and control terminal
Mouthful, the USB port is used to connect OTG slave units, and the adapter input is used to connect adapter, and the power pin connects
Connect the power supply of the intelligent object；
The usb data anode pin, the usb data negative terminal pin, the USB ID pins are corresponding to the USB port connects
Connect, the adapter input is connected with the first port, the USB power pins respectively, the GPIO pins with it is described
Control port is connected, and the power end of the USB port is connected with the second port, the power pin and the 3rd port
Connection；
Detect that the USB power pins are changed into high level and intelligent object detection from low level in the intelligent object
When being changed into low level from high level to the USB ID pins, the GPIO pins are arranged to high level and used by the intelligent object
The second port and the first port are disconnected and by the second port and described the in controlling the switching circuit
Three ports turn on, and the intelligent object obtains power supply by the USB power pins from the adapter input, and described
Charge Management unit passes through power supply charging and the confession of the intelligent object of the power pin to the intelligent object
Power supply is powered by the switching circuit to the OTG slave units, and the intelligent object passes through the positive pole pipe of the usb data
Pin, the usb data negative pole pin and the OTG slave units complete data exchange.
2. OTG and the difunctional system that charges are realized based on intelligent object as claimed in claim 1, it is characterised in that in institute
State intelligent object and detect that the USB power pins, the usb data negative terminal pin are low level state and the USB numbers
When according to anode pin, the USB ID pins being high level, the GPIO pins default setting is low by the intelligent object
Level, the switching circuit include first resistor, second resistance, the first triode, the second triode and PMOS, the PMOS
The drain electrode of pipe is used to being used as the first port, the source electrode of the PMOS respectively with described first resistor one end, described second
Be used as the second port after the connection of resistance one end, the grid of the PMOS respectively with the first resistor other end, described
The colelctor electrode connection of first triode, the grounded emitter of first triode, the base stage of first triode respectively with
The colelctor electrode connection of the second resistance other end, the second triode, the grounded emitter of second triode, described second
The base stage of triode is as the control port.
3. OTG and the difunctional system that charges are realized based on intelligent object as claimed in claim 1, it is characterised in that described
Charge Management unit also includes supply voltage detection pin, the power supply electricity of the supply voltage detection pin and the intelligent object
Source connects, when it is full of electricity condition that the Charge Management unit, which detects the power supply of the intelligent object, the charging
Administrative unit stops charging to the power supply of the intelligent object by the power pin.
4. OTG and the difunctional system that charges are realized based on intelligent object as claimed in claim 2, it is characterised in that described
Switching circuit also includes 3rd resistor, and described 3rd resistor one end is connected with the base stage of second triode, other end ground connection.
5. OTG and the difunctional system that charges are realized based on intelligent object as claimed in claim 1, it is characterised in that described
Switching circuit also includes mu balanced circuit, and the mu balanced circuit also includes Enable Pin, and the Enable Pin is connected with the control port,
The input of the mu balanced circuit is the 3rd port, and the output end of the mu balanced circuit is the second port, described to make
Can end be high level effective for control the mu balanced circuit by after the power supply voltage stabilizing of the intelligent object by described the
Two-port netwerk exports.
6. OTG and the difunctional system that charges are realized based on intelligent object as claimed in claim 5, it is characterised in that described
Mu balanced circuit also includes diode, and the output end of the mu balanced circuit is connected with the anode of the diode, the diode
Negative electrode is as the second port.
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| CN201710801156.3A CN107643998B (en) | 2017-09-07 | 2017-09-07 | System for realizing OTG and charging dual functions based on intelligent module |
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| CN201710801156.3A CN107643998B (en) | 2017-09-07 | 2017-09-07 | System for realizing OTG and charging dual functions based on intelligent module |
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| CN108446246A (en) * | 2018-02-27 | 2018-08-24 | 努比亚技术有限公司 | A kind of implementation method, device and the computer storage media of OTG functions |
| CN108446246B (en) * | 2018-02-27 | 2021-09-21 | 努比亚技术有限公司 | Method and device for realizing OTG function |
| CN108594978A (en) * | 2018-05-08 | 2018-09-28 | 北京振中电子技术有限公司 | A kind of control method and device of handheld terminal |
| CN109617166A (en) * | 2018-12-21 | 2019-04-12 | 重庆大唛物联网科技有限公司 | Charging equipment for mobile phone and mobile phone protecting case |
| CN110765054A (en) * | 2019-10-24 | 2020-02-07 | 深圳市皓丽智能科技有限公司 | Switching circuit of conference tablet system, conference tablet and OPS (optical fiber switch) equipment |
| CN110765054B (en) * | 2019-10-24 | 2021-06-18 | 深圳市皓丽智能科技有限公司 | Switching circuit of conference tablet system, conference tablet and OPS (optical fiber switch) equipment |
| CN115391258A (en) * | 2022-08-16 | 2022-11-25 | 云码智能(海南)科技有限公司 | Interface management circuit, method, apparatus, device, storage medium, and program product |
| CN115391258B (en) * | 2022-08-16 | 2023-05-02 | 云码智能(海南)科技有限公司 | Interface management circuit, method, apparatus, device, storage medium, and program product |
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