CN105071488B - A kind of charging method and device of the terminal with data exchanging function - Google Patents

Abstract

The embodiment of the present invention discloses a charging method and device for a terminal with a data exchange function. The method includes: detecting whether the terminal is in the power-off state; when detecting that the terminal is in the power-off state, turning off the USB The data exchange access mode of the interface is switched to the execution device charging access mode. The present invention regards detecting whether the terminal is in the power-off state as the judgment condition for switching the terminal access mode, which not only realizes the switching of the access mode of the USB interface of the terminal, but also solves the terminal problem caused by the short circuit of the identification pin of the USB interface of the terminal in the prior art. The problem of not being able to charge.

Description

A charging method and device for a terminal with data exchange function

technical field

The invention relates to charging technology, in particular to a charging method and device for a terminal with data exchange function.

Background technique

At present, more and more electronic terminal devices such as mobile phones have the function of data exchange (On-The-Go, OTG). After the external power supply is connected, the terminal can be charged through the external power supply.

Taking a mobile phone terminal as an example, as shown in Figure 1, it is a schematic diagram of a universal serial bus (UniversalSerial Bus, USB) interface of a mobile phone provided by the prior art, the USB interface has a ground pin GND, an identification pin ID, a positive voltage data Pin D+, negative voltage data pin D- and power pin VBUS. The mobile phone detects the OTG device through the OTG identification pin (ID) of the USB interface, and the mobile phone detects the external power supply through the power pin (VBUS) of the USB interface. Therefore, the mobile phone can accurately identify the external power supply through the USB interface. OTG device and external power supply. When the OTG device is connected to the USB interface of the mobile phone, the ID pin of the mobile phone will be connected with the chip of the OTG device to realize communication with the external OTG device. When the USB interface of the terminal communicates with an external OTG device, the terminal is in the OTG access mode; or when the USB interface of the terminal is connected to an external power supply for charging, the terminal is in the device charging access mode.

The USB interface of most terminals is directly exposed to the air, and external devices are frequently plugged into or pulled out of the USB interface, so the USB interface is very vulnerable to corrosion or wear and tear and cause a micro-short circuit.

Specifically, taking a mobile phone as an example, the ID pin of the USB interface of the mobile phone is easily corroded to cause a micro-short circuit. At this time, the ID pin is short-circuited with the surrounding metal (such as the GND pin). The impedance of the ID pin to ground is 1.5M under normal circumstances, and the resistance range of the OTG device identified by the ID pin is between 0 and 180KΩ. After the GND pin and the ID pin are short-circuited, the micro-short resistance of the ID pin is 0.1 Between KΩ-10KΩ, so the mobile phone system will recognize the short circuit of the ID pin as the access of the OTG device. When the mobile phone system recognizes that the OTG device is connected, the mobile phone system will output 5V power through the VBUS pin for OTG detection, that is, detect and identify the OTG device in the OTG access mode. If the external power supply is connected to the mobile phone at the current moment, since the mobile phone system is in the OTG access mode, the mobile phone cannot realize the charging function. When the power of the mobile phone is insufficient to shut down, the mobile phone is still in the OTG access mode due to the short circuit of the ID pin, and the mobile phone still cannot be charged even if it is connected to an external power supply.

At present, most electronic terminal devices have built-in batteries, and the short circuit of the ID pin makes the terminal unable to charge even when the terminal is turned off, which affects the normal use of the user and brings a lot of inconvenience to the user.

Contents of the invention

The invention provides a charging method and device for a terminal with a data exchange function to solve the problem in the prior art that the USB interface of the terminal cannot be charged due to a short circuit.

In a first aspect, an embodiment of the present invention provides a charging method for a terminal with a data exchange function, including:

Detecting whether the terminal is in a power-off state;

When it is detected that the terminal is in the power-off state, the data exchange access mode of the USB interface of the terminal is turned off and switched to the device charging access mode.

In the second aspect, an embodiment of the present invention also provides a charging device for a terminal with a data exchange function, which is characterized in that it includes:

A terminal state detection module, configured to detect whether the terminal is in a power-off state;

The access mode switching module is configured to close the data exchange access mode of the USB interface of the terminal and switch to the device charging access mode when it is detected that the terminal is in the power-off state.

A charging method and device for a terminal with a data exchange function provided by the present invention, by detecting whether the terminal is in the shutdown state, when it is detected that the terminal is in the shutdown state, the data exchange access mode of the USB interface of the terminal is controlled to be turned off, and the switch is controlled. To implement the device charging access mode to control the terminal to charge. The present invention regards detecting whether the terminal is in the power-off state as the judgment condition for switching the terminal access mode, which not only realizes the switching of the access mode of the USB interface of the terminal, but also solves the terminal problem caused by the short circuit of the identification pin of the USB interface of the terminal in the prior art. The problem of not being able to charge.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the schematic diagram of the mobile phone USB interface that prior art provides;

FIG. 2 is a schematic flowchart of a charging method for a terminal with a data exchange function provided by Embodiment 1 of the present invention;

3 is a schematic flowchart of a charging method for a terminal with a data exchange function provided by Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a charging device for a terminal with a data exchange function provided by Embodiment 3 of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through implementation with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It can be seen from the prior art that when the USB interface of a terminal with OTG function is short-circuited, no matter whether there is an external OTG device inserted into the USB interface of the terminal, the terminal is always in the detection of the OTG device, that is, data exchange (OTG) in the shutdown state and the power-on state. ) access mode, the terminal cannot charge at this time.

In actual operation, a terminal with an OTG function generally performs OTG communication in a power-on state, and does not perform OTG communication when the terminal is in a power-off state. Therefore, the present invention ensures that charging can be realized when the ID pin is invalid by turning off the OTG access mode of the terminal when the terminal is turned off, thereby reducing user inconvenience.

Embodiment one

FIG. 2 is a schematic flowchart of a terminal charging method with a data exchange function provided by Embodiment 1 of the present invention. The technical solution of this embodiment is applicable to a terminal with an OTG function, and controls the execution of the data exchange access mode or the execution of the device charging access mode according to the power-on or power-off status of the terminal. The terminal can be any electronic device with an OTG function, typically such as a mobile phone, a tablet computer, and the like. The method can be executed by a charging device of a terminal having an OTG function, and the device can be implemented in software and/or hardware, and configured to be executed in the terminal. The charging method for a terminal with a data exchange function provided in this embodiment specifically includes:

S110. Detect whether the terminal is in a power-off state.

As mentioned above, the USB interface of the terminal has a ground pin GND, an identification pin ID, a positive voltage data pin D+, a negative voltage data pin D−, and a power supply pin VBUS. The terminal needs to determine whether it is in the shutdown state, so as to determine whether to enter the corresponding data exchange access mode or device charging access mode, and complete the corresponding operation.

In this step, by detecting whether the terminal is in the power-off state, as a judgment basis for forcing the terminal to enter the charging state, the terminal is in the device charging access mode in the power-off state.

S120. When it is detected that the terminal is in the power-off state, turn off the data exchange access mode of the USB interface of the terminal and switch to the device charging access mode.

As mentioned above, when it is detected that the terminal is in the shutdown state, it means that even if the USB interface of the terminal is connected to the OTG device, the OTG operation cannot be performed. At this time, the data exchange access mode of the USB interface of the terminal is forcibly controlled, and the switching of the USB interface of the terminal is controlled. Access mode for implementing device charging. In this way, if a power supply device is connected to the USB interface, the terminal can be charged.

It should be noted that a data exchange identification circuit is provided on the terminal, and the data exchange identification circuit is used to perform detection, identification and access to external OTG devices, that is, the data exchange identification circuit executes a data exchange access mode. Therefore when detecting that the terminal is in the shutdown state, controlling the data exchange access mode of the USB interface of the terminal to close is to control the data exchange identification circuit to be closed, so that the data exchange identification circuit stops the access detection, identification and access to the OTG device.

In this step, regardless of whether the USB interface is short-circuited or normal, as long as it is detected that the terminal is powered off, the terminal is forced to switch to the device charging access mode, so that the terminal can charge when a power device is connected to the USB interface.

In this embodiment, the detection of whether the terminal is in the power-off state is used as the judgment condition for switching the terminal access mode, which not only realizes the switching of the access mode of the USB interface of the terminal, but also solves the problem caused by the short circuit of the identification pin of the USB interface of the terminal in the prior art. The problem that the terminal cannot be charged even when it is turned off.

Embodiment two

FIG. 3 is a schematic flowchart of a terminal charging method with a data exchange function provided by Embodiment 2 of the present invention. The method can be executed by a charging device of a terminal having an OTG function, and the device can be implemented in software and/or hardware, and configured to be executed in the terminal. The charging method for a terminal with a data exchange function provided in this embodiment specifically includes:

S210. Detect whether the terminal sends electromagnetic waves

When the terminal is in the power-on state, the terminal will send electromagnetic signals to communicate or search for nearby networks, so it can be determined whether the terminal is in the power-on state by detecting whether the terminal sends electromagnetic waves.

When it is detected that the terminal sends electromagnetic waves, it is determined that the terminal is in a power-on state, and the corresponding USB interface of the terminal executes a data exchange access mode. When it is detected that the terminal does not send electromagnetic waves, it is determined that the terminal is in a power-off state, and the corresponding control closes the data exchange access mode of the USB interface and forces the terminal to switch to the device charging access mode for charging.

In this step, whether the terminal sends electromagnetic waves is used as a judgment basis for detecting whether the terminal is in a power-off state.

S220. When it is detected that the terminal is in the power-off state, turn off the data exchange access mode of the USB interface of the terminal and switch to the execution device charging access mode.

When it is detected that the terminal is in the power-off state, if the current terminal is already in the device charging access mode, the terminal is controlled to continue executing the device charging access mode. When it is detected that the terminal is in the power-off state, if the current terminal is in the data exchange access mode, then close the data exchange access mode of the USB interface of the terminal, and control the terminal to switch to the execution device charging access mode.

Optionally, the specific implementation process of closing the data exchange access mode of the USB interface of the terminal may be: disconnecting the enable signal transmitted to the data exchange identification circuit in the terminal, so as to close the data exchange access mode.

The terminal controls the USB interface to be in the data exchange access mode specifically by inputting an enable signal to the data exchange identification circuit, so that the data exchange identification circuit is in the data exchange mode. When the terminal controls the USB interface to be in the device charging access mode, the terminal needs to control to close the data exchange identification circuit so that the data exchange identification circuit is no longer in the data exchange access mode. Therefore, the terminal can close the data exchange identification circuit by disconnecting the enable signal transmitted to the data exchange identification circuit, and the corresponding control closes the data exchange access mode.

S230. In the device charging access mode, detect whether the voltage of the power pin of the USB interface of the terminal is greater than or equal to the charging voltage threshold.

When the USB interface of the terminal is switched to the device charging access mode, the USB interface needs to confirm whether there is a power supply device connected, so that the device can be charged immediately when the power supply device is connected. Specifically, it is detected whether the voltage signal of the power supply pin of the USB interface is greater than or equal to a preset charging voltage threshold, so as to determine whether to charge. If the voltage signal of the power pin of the USB interface is greater than or equal to the charging voltage threshold, it can be determined that the USB interface of the terminal has a power supply connected; if the voltage signal of the power pin of the USB interface is less than the charging voltage threshold, it can be determined that the USB interface of the terminal No power equipment is connected.

In this step, in the device charging access mode, it is determined whether a power supply device is connected to the USB interface by detecting whether the voltage signal of the power pin of the USB interface of the terminal is greater than or equal to the charging voltage threshold.

S240. When it is detected that the voltage of the power supply pin is lower than the charging voltage threshold, return and continue to detect whether the terminal sends electromagnetic waves.

When it is determined that no power supply device is connected to the USB interface of the terminal, it can return and continue to detect whether the terminal sends electromagnetic waves. Switch the access mode of the terminal according to the detection result and perform corresponding control.

This step can enable the terminal to detect the access of the power device when the USB interface is short-circuited, so as to solve the problem in the prior art that the terminal cannot enter the device charging access mode when the USB interface is short-circuited or turned off.

S250. When it is detected that the voltage of the power pin of the USB interface of the terminal is greater than or equal to the charging voltage threshold, charge the device through the USB interface.

When the voltage of the power pin of the USB interface of the terminal is greater than or equal to the charging power threshold, it means that a power supply device is connected to the USB interface of the terminal. At this time, in the device charging access mode, the power supply device charges the terminal through the USB interface of the terminal.

It should be noted that when it is detected that the terminal sends electromagnetic waves, it can be determined that the terminal is in the power-on state, and the terminal is in the data exchange mode. Therefore, after step S210, it also includes: S260, in the data exchange access mode, when it is detected that the identification pin of the USB interface of the terminal is lower than the low level state, perform data exchange with the external device. When the identification pin of the USB interface of the terminal is lower than the low level state, it means that an OTG device is detected at the USB interface of the terminal. At this time, the terminal can perform OTG detection, identification and access to the connected OTG device to Perform data exchange with OTG devices.

This embodiment also provides another charging method for a terminal with a data exchange function, which is different from the above charging method in this embodiment in that it detects whether the terminal is powered off by detecting whether the power supply of the terminal is off.

Obviously, when the terminal is in the power-on state, the terminal is generally supplying power to its internal functional modules, its internal power supply is generally connected, and the corresponding USB interface of the terminal executes data exchange access mode. When the terminal is in the shutdown state, most of the functional modules of the terminal are in the shutdown state, and the power supply inside the terminal is disconnected from these functional modules. Therefore, the shutdown status of the terminal can be judged by the disconnection of the power supply inside the terminal. The corresponding control closes the data exchange access mode of the USB interface and forces the terminal to switch to the device charging access mode for charging.

The process of the charging method is: firstly, detect whether the terminal power supply is disconnected, specifically, it can be judged by detecting whether the power supply of the functional modules necessary to maintain the terminal is disconnected, and if so, determine that the terminal is in the shutdown state; when detecting When the terminal is in the shutdown state, close the data exchange access mode of the USB interface of the terminal and switch to the device charging access mode; in the device charging access mode, detect whether the voltage of the power pin of the USB interface of the terminal is greater than or equal to the charging voltage threshold ; When it is detected that the voltage of the power pin is greater than or equal to the charging voltage threshold, the device is charged through the USB interface.

It should be noted that, if it is detected that the power supply of the terminal is not disconnected, it is determined that the terminal is in the power-on state, and the terminal executes the data exchange access mode. When it is detected that the identification pin of the USB interface of the terminal is in a low level state, it can be determined that an external OTG device is connected to the USB interface, and then the terminal and the external OTG device can exchange data.

In the charging method for a terminal with a data exchange function provided in this embodiment, when it is detected that the terminal does not send electromagnetic waves or the power is cut off, the terminal is in a shutdown state, and the data exchange access mode of the USB interface is controlled to be turned off and switched to the execution device charging access mode. And when it is detected that the voltage of the power supply pin is greater than or equal to the preset charging voltage threshold, the control terminal is charged. In this embodiment, the detection of whether the terminal is in the power-off state is used as the judgment condition for switching the terminal access mode, which not only realizes the switching of the access mode of the USB interface of the terminal, but also solves the problem caused by the short circuit of the identification pin of the USB interface of the terminal in the prior art. The problem that the terminal cannot be charged even when it is turned off.

Embodiment three

FIG. 4 is a schematic structural diagram of a terminal charging device with a data exchange function provided by Embodiment 3 of the present invention. The device can implement the method for charging a terminal with an OTG function described in the above-mentioned embodiments in the form of software and/or hardware, and the device is configured to be executed in the terminal.

The third embodiment provides a charging device for a terminal with a data exchange function, including: a terminal state detection module 310 and an access mode switching module 320 .

Wherein, the terminal state detection module 310 is used to detect whether the terminal is in the shutdown state; the access mode switching module 320 is used to close the data exchange of the Universal Serial Bus USB interface of the terminal when detecting that the terminal is in the shutdown state access mode and switch to perform device charging access mode.

Optionally, the terminal state detection module 310 includes: an electromagnetic wave detection unit 311 or a power supply detection unit 312 .

Wherein, the electromagnetic wave detection unit 311 is used to detect whether the terminal sends electromagnetic waves, if not, then determine that the terminal is in a power-off state; The terminal is turned off.

Optionally, the specific implementation process of the access mode switching module 320 closing the data exchange access mode of the USB interface of the terminal is: disconnecting the enable signal transmitted to the data exchange identification circuit in the terminal to close the data exchange access mode.

Optionally, the charging device further includes: a data mode execution module 330, configured to detect that the USB If the identification pin of the interface is in a low level state, data exchange with the external device is performed.

Optionally, the charging device further includes: a power pin detection module 340 and a charging mode execution module 350 .

Wherein, the power pin detection module 340 is used to detect all Whether the voltage of the power supply pin of the USB interface of the terminal is greater than or equal to the charging voltage threshold; the charging mode execution module 350 is used to pass the USB interface to charge the device.

The third embodiment provides a charging device for a terminal with a data exchange function. The terminal state detection module detects whether the terminal is in the shutdown state. When it is detected that the terminal is in the shutdown state, the access mode switching module closes the data of the USB interface of the terminal. Swap access modules and switch to execute device charging access mode to control terminal for charging. In this embodiment, the detection of whether the terminal is in the power-off state is used as the judgment condition for switching the terminal access mode, which not only realizes the switching of the access mode of the USB interface of the terminal, but also solves the problem caused by the short circuit of the identification pin of the USB interface of the terminal in the prior art. The problem that the terminal cannot be charged.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (6)

1. A kind of 1. charging method of the terminal with data exchanging function, it is characterised in that including：

   Whether detection terminal sends electromagnetic wave or whether power supply disconnects, and the basis for estimation of charged state is forced into as terminal；

   When detecting that the terminal does not send electromagnetic wave or power supply disconnection, disconnection is transmitted to the data in terminal to exchange and identified The enable signal of circuit, to close data exchange access module, and switch to and perform equipment charge access module.
2. 2. charging method according to claim 1, it is characterised in that when detecting that the terminal sends electromagnetic wave or power supply After not disconnecting, in addition to：

   Under the data exchange access module, when the identified pins for detecting USB interface are in low level state, then perform with The data exchange of external equipment.
3. 3. charging method according to claim 1, it is characterised in that when detecting that the terminal do not send electromagnetic wave or electricity When source disconnects, the enable signal transmitted to the data in terminal and exchange identification circuit is disconnected, mould is accessed to close data exchange Formula, and switch to perform equipment charge access module after, in addition to：

   Under the equipment charge access module, detect the power pins of the USB interface of the terminal voltage whether be more than or Equal to charging voltage threshold value；

   When the voltage for detecting the power pins is more than or equal to the charging voltage threshold value, entered by the USB interface Row equipment charge.
4. A kind of 4. charging device of the terminal with data exchanging function, it is characterised in that including：

   SOT state of termination detection module, whether send electromagnetic wave for detection terminal or whether power supply disconnect, as terminal force into Enter the basis for estimation of charged state；

   Access module handover module, for when detecting that the terminal does not send electromagnetic wave or power supply and disconnected, disconnection transmit to The data in terminal exchanges the enable signal of identification circuit, to close data exchange access module, and switches to execution equipment Charge access module.
5. 5. charging device according to claim 4, it is characterised in that also include：

   Data pattern execution module, for after detecting that the terminal sends electromagnetic wave or power supply does not disconnect, in the number According under switched access pattern, when the identified pins for detecting USB interface are in low level state, then the number with external equipment is performed According to exchange.
6. 6. charging device according to claim 4, it is characterised in that also include：

   Power pins detection module, for when detecting that the terminal does not send electromagnetic wave or power supply and disconnected, disconnection transmit to The data in terminal exchanges the enable signal of identification circuit, to close data exchange access module, and switches to execution equipment Charge after access module, under the equipment charge access module, detect the electricity of the power pins of the USB interface of the terminal Whether pressure is more than or equal to charging voltage threshold value；

   Charge mode execution module, for being more than or equal to the charging voltage threshold value when the voltage for detecting the power pins When, equipment charge is carried out by the USB interface.