CN108681514A - Equipment detection method, device, storage medium and electronic equipment - Google Patents

Abstract

The embodiment of the present application discloses a kind of equipment detection method, device, storage medium and electronic equipment, wherein, the embodiment of the present application for the ID pins of Universal Serial Bus Interface by providing a low-voltage, and whether preset value is reached according to the voltage change of ID pins, to judge whether Universal Serial Bus Interface may access external equipment, and then when Universal Serial Bus Interface may access external equipment, a high voltage for external equipment access detection is provided for ID pins, to realize that the access of external equipment detects.Thus, it only needs to provide high voltage in a relatively short period of time for ID pins, and low-voltage is provided for ID pins in longer other times, in contrast, the corrosion that low-voltage brings Universal Serial Bus Interface, the corrosion that high voltage brings Universal Serial Bus Interface is will be far below, almost can be ignored.Thus, it is possible to achieve the purpose that put forward Universal Serial Bus Interface service life.

Description

Equipment detection method, device, storage medium and electronic equipment

technical field

The present application relates to the technical field of electronic equipment, and in particular to an equipment detection method, device, storage medium and electronic equipment.

Background technique

At present, the universal serial bus interface has become a standard interface of electronic devices such as tablet computers and mobile phones. Electronic devices can be connected with external devices through a universal serial bus interface to realize interaction between devices. For this reason, it is necessary to carry out the access detection of the external equipment at first. When the related technology implements the access detection of the external device, it will continuously provide the detection voltage to the ID pin of the universal serial bus interface.

However, for the convenience of users, the universal serial bus interface of electronic equipment is usually exposed, which makes the universal serial bus interface easy to contact with corrosive liquid (such as sweat), while the ID pin is continuously charged , will accelerate the corrosion of the universal serial bus interface, thereby affecting the service life of the universal serial bus interface.

Contents of the invention

Embodiments of the present application provide a device detection method, device, storage medium and electronic device, which can improve the service life of a universal serial bus interface.

In the first aspect, the embodiment of the present application provides a device detection method, including:

providing a first voltage for the ID pin of the universal serial bus interface;

Detecting whether the voltage change value of the ID pin reaches a preset value;

When the voltage change value reaches the preset value, provide the ID pin with a second voltage for external device access detection, wherein the first voltage is smaller than the second voltage;

According to the current state of the ID pin, determine whether there is an external device connected to the universal serial bus interface.

In the second aspect, an equipment detection device provided in an embodiment of the present application includes:

A voltage supply module, used to provide the first voltage for the ID pin of the universal serial bus interface;

A voltage detection module, configured to detect whether the voltage change value of the ID pin reaches a preset value;

The voltage supply module is further configured to provide the ID pin with a second voltage for external device access detection when the voltage change value reaches the preset value, wherein the first voltage is less than the preset value. the second voltage;

The device identification module is used to determine whether an external device is connected to the universal serial bus interface according to the ID pin.

In the third aspect, the storage medium provided by the embodiment of the present application has a computer program stored thereon, and when the computer program is run on the computer, the computer is made to execute the device detection method provided in any embodiment of the present application.

In a fourth aspect, the electronic device provided by the embodiment of the present application includes a processor and a memory, the memory has a computer program, and the processor is used to execute the device provided by any embodiment of the present application by calling the computer program Detection method.

In the embodiment of the present application, by providing a low voltage for the ID pin of the universal serial bus interface, and judging whether the universal serial bus interface may be connected to an external device according to whether the voltage change value of the ID pin reaches a preset value, Furthermore, when the USB interface may be connected to an external device, a high voltage for detecting the connection of the external device is provided to the ID pin, so as to realize the detection of the connection of the external device. Therefore, it is only necessary to provide a high voltage for the ID pin in a short period of time, and provide a low voltage for the ID pin in a relatively long period of time. Corrosion will be much lower than the corrosion caused by high voltage to the universal serial bus interface, and it can be almost ignored. Thus, the purpose of improving the service life of the universal serial bus interface can be achieved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of an application scenario of a device detection method provided in an embodiment of the present application.

Fig. 2 is a schematic flowchart of a device detection method provided by an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a device detection circuit provided in an embodiment of the present application.

FIG. 4 is an example diagram of providing a first voltage for an ID pin in an embodiment of the present application.

FIG. 5 is an example diagram of an external device connected to a universal serial bus interface in the embodiment of the present application.

FIG. 6 is an example diagram of providing a second voltage for the ID pin in the embodiment of the present application.

FIG. 7 is a schematic diagram of an interface for displaying a confirmation message input in an embodiment of the present application.

FIG. 8 is another schematic flowchart of the device detection method provided by the embodiment of the present application.

FIG. 9 is a schematic structural diagram of an equipment detection device provided by an embodiment of the present application.

FIG. 10 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

FIG. 11 is another schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

Referring to the drawings, wherein the same reference numerals represent the same components, the principles of the present application are exemplified by being implemented in a suitable computing environment. The following description is based on illustrated specific embodiments of the present application, which should not be construed as limiting other specific embodiments of the present application that are not described in detail here.

In the following description, specific embodiments of the present application will be described with reference to steps and symbols executed by one or more computers, unless otherwise stated. Accordingly, these steps and operations will several times be referred to as being computer-implemented, which herein refers to operations by a computer processing unit of electronic signals representing data in a structured form. This operation transforms the data or maintains it at a location in the computer's memory system that can reconfigure or otherwise alter the operation of the computer in a manner well known to testers in the art. The data structures maintained by the data are physical locations in the memory that have certain characteristics defined by the data format. However, the principle of the present application is described in the above text, which is not meant to be a limitation, and testers in the field will understand that the various steps and operations described below can also be implemented in hardware.

The term "module" as used herein may be considered a software object that executes on the computing system. The various components, modules, engines and services described herein can be considered as implementation objects on the computing system. The devices and methods described herein can be implemented in the form of software, and of course can also be implemented in hardware, all of which are within the protection scope of the present application.

The terms "first", "second" and "third" in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but some embodiments also include steps or modules that are not listed, or some embodiments Other steps or modules inherent to these processes, methods, products or devices are also included.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

An embodiment of the present application provides a device detection method. The execution body of the device detection method may be the device detection device provided in the embodiment of the present application, or an electronic device integrated with the device detection device. The device detection device may use hardware or realized by software. Wherein, the electronic device may be a computer device such as a smart phone, a tablet computer, a palmtop computer, a notebook computer, or a desktop computer.

Please refer to Figure 1. Figure 1 is a schematic diagram of the application scene of the device detection method provided by the embodiment of the present application. Taking the device detection device integrated in the electronic device as an example, the electronic device can provide the first ID pin for the universal serial bus interface. Voltage; detect whether the voltage change value of the ID pin reaches a preset value; when the voltage change value of the ID pin reaches a preset value, provide the ID pin with a second voltage for external device access detection, wherein the first A voltage is lower than the second voltage, for example, the second voltage is configured as 3.3V, and the first voltage is configured as 0.5V; according to the current state of the ID pin, determine whether there is an external device connected to the USB interface, and obtain the external The detection result that the device is connected to the universal serial bus interface or the external device is not connected to the universal serial bus interface.

Please refer to FIG. 2 , which is a schematic flowchart of a device detection method provided in an embodiment of the present application. The flow of the device detection method provided in the embodiment of the present application may be as follows:

In step 101, a first voltage is provided to an ID pin of a universal serial bus interface.

In the embodiment of the present application, the USB interface of the electronic device is in the form of a mini USB interface or a micro USB interface, which supports the OTG function. With the OTG function, electronic devices can work in two identities, "host" and "peripheral".

It should be noted that, in the embodiment of this application, the external device is connected to the electronic device as a "peripheral device", and correspondingly, the electronic device works as a "host". By connecting to the external device, the electronic device can communicate with the external device Perform data communication, or use external devices to expand its own functions. Wherein, the external device may be a USB flash drive, a mouse, a keyboard, a game controller, and other electronic devices.

For example, taking the electronic device as a mobile phone as an example, the user can connect the mouse to the universal serial bus interface of the mobile phone to operate the electronic device through the mouse; the user can also connect the USB flash drive to the universal serial bus interface of the mobile phone, Read the audio and video files in the U disk through the mobile phone, play the audio and video files, or store the files in the mobile phone to the U disk to realize file backup, etc.

In order to realize the OTG function, the universal serial bus interface of the electronic device has 5 pins, and its pin definitions are shown in Table 1 below:

VBUS D- D+ ID GND

Table 1

Among them, VBUS is the power supply pin, which is used to provide power to the connected external equipment, D-, D+ are signal pins, used for data transmission with the connected external equipment, GND is the ground pin, and the ID pin is used for It is used to identify different cable end points, realize access detection of external equipment, role distinction, etc.

In the embodiment of the present application, in order to realize the access detection of the external device, the electronic device first provides the first voltage for the ID pin of the universal serial bus interface.

In step 102, it is detected whether the voltage change value of the ID pin reaches a preset value.

It should be noted that, as an external device as a "peripheral device", the ID pin of its universal serial bus interface is grounded. For example, the ID pin of the external device is grounded through a pull-down resistor, wherein the pull-down resistor can be a separate resistor , can also be composed of multiple resistors connected in series and/or in parallel.

In this way, when an external device is connected to the electronic device, the voltage on the ID pin of the electronic device will be pulled down by the ID pin of the external device. Therefore, in the embodiment of the present application, after the electronic device provides the first voltage to the ID pin, it can determine whether the USB interface of the electronic device is connected to an external device according to detecting the voltage change value of the ID pin.

In the embodiment of the present application, after providing the first voltage to the ID pin of the universal serial bus interface, the electronic device detects whether the voltage change value of the ID pin reaches a preset value, wherein, after detecting the voltage change of the ID pin When the value reaches the preset value, it is determined that there may be an external device connected to its universal serial bus interface. When it is detected that the voltage change value of the ID pin does not reach the preset value, it is determined that no external device is connected to its universal serial bus interface. .

As an implementation, after the electronic device provides the first voltage to the ID pin of its universal serial bus interface, it detects the voltage of the ID pin in real time to obtain the real-time voltage, and calculates the voltage between the first voltage and the real-time voltage Difference, the calculated voltage difference is used as the voltage change value of its ID pin.

It should be noted that since the ID pin of the external device is grounded, when the external device is connected to the USB interface of the electronic device, the ID pin of the electronic device will also be grounded, and the voltage of the ID pin will be pulled down to 0V . Therefore, in the embodiment of the present application, the preset value for judging whether the USB interface may be connected to an external device is set as the voltage value of the first voltage, for example, the electronic device is using the ID of the USB interface. When the provided first voltage is 0.5V, the aforementioned preset value is also configured as 0.5V.

In step 103, when the voltage change value of the ID pin reaches a preset value, a second voltage for external device access detection is provided to the ID pin, wherein the first voltage is smaller than the second voltage.

In the embodiment of the present application, after the electronic device completes the detection of the voltage change value on its ID pin, and detects that the voltage change value reaches the preset value, it is determined that there may be an external device connected to its universal serial bus interface. , the ID pin is provided with a second voltage for external device access detection, that is, the ID pin is pulled up to a high voltage.

It should be noted that, in the embodiment of the present application, the first voltage previously provided for the ID pin is smaller than the second voltage currently provided for the ID pin, and the first voltage is much smaller than the second voltage. For example, the first voltage provided by the electronic device to its ID pin is 0.5V, and when it is detected that the voltage change value of the ID pin reaches a preset value, the second voltage provided to its ID pin is 3.3V.

In step 104, it is determined whether there is an external device connected to the USB interface according to the current state of the ID pin.

In the embodiment of the present application, after the electronic device provides the second voltage for the ID pin, it detects the state of the ID pin to obtain the current state of the ID pin. Then, according to the obtained current state, it is determined whether there is an external device connected to the universal serial bus interface.

It should be noted that since the ID pin of the external device is grounded, when the external device is connected to the USB interface of the electronic device, the ID pin of the electronic device will also be grounded. When the universal serial bus interface of the electronic device is connected, the ID pin of the electronic device will be in a ground state.

Therefore, in the embodiment of the present application, when determining whether an external device is connected to the universal serial bus interface according to the current state of the ID pin, it can be detected whether the current state of the ID pin is grounded; When the current state of the pin is grounded, it is determined that an external device is connected to the universal serial bus interface; when the current state of the ID pin is not in the grounded state, it is determined that no external device is connected to the universal serial bus interface.

As can be seen from the above, the embodiment of the present application provides a low voltage for the ID pin of the universal serial bus interface, and judges whether the universal serial bus interface may be connected according to whether the voltage change value of the ID pin reaches a preset value. The external device is connected, and then when the universal serial bus interface may be connected to the external device, a high voltage for the external device access detection is provided for the ID pin, so as to realize the external device access detection. Therefore, it is only necessary to provide a high voltage for the ID pin in a short period of time, and provide a low voltage for the ID pin in a relatively long period of time. Corrosion will be much lower than the corrosion caused by high voltage to the universal serial bus interface, and it can be almost ignored. Thus, the purpose of improving the service life of the universal serial bus interface can be achieved.

In one embodiment, a device detection circuit of an electronic device is provided. Please refer to FIG. groups and comparators. Wherein, the ID pin of the universal serial bus interface is electrically connected to the input end of the single-pole double-throw switch, and an output end of the single-pole double-throw switch is electrically connected to an input end of the comparator, and is also electrically connected to the first voltage supply module connected, the other output end of the single pole double throw switch is electrically connected to the second voltage supply module, the other input end of the comparator is electrically connected to the reference voltage supply module, and the reference voltage provided by the reference voltage supply module is lower than the first A first voltage provided by a voltage supply module, the first voltage provided by the first voltage supply module is lower than the second voltage provided by the second voltage supply module.

Based on the device detection circuit shown in FIG. 3, in one embodiment, providing the first voltage for the ID pin of the universal serial bus interface includes:

The SPDT switch is controlled to connect the ID pin and the first voltage supply module, and the first voltage supply module supplies the ID pin with the first voltage.

Wherein, please refer to FIG. 4, when providing the first voltage for the ID pin of the universal serial bus interface, the electronic device can control the single-pole double-throw switch to connect the ID pin and the first voltage supply module, and the first voltage provides The module provides the first voltage for the ID pin.

For example, the output voltage of the first voltage supply module is 0.5V. When the ID pin and the first voltage supply module are connected through a single-pole double-throw switch, the first voltage module will provide the first voltage of 0.5V for the ID pin. a voltage.

In an optional implementation, if the output end of the SPDT switch connected to the ID pin is connected to the positive input end of the comparator, and the reference voltage supply module is connected to the negative input end of the comparator, please refer to the figure 3. As shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module is The positive input terminal of the comparator provides a first voltage, and the reference voltage supply module provides a reference voltage for the negative input terminal of the comparator. Since the first voltage is greater than the reference voltage, the output terminal of the comparator will output a high voltage.

Please refer to FIG. 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage for the positive input terminal of the comparator and the ID pin, At this time, the output terminal of the comparator will still output a high voltage.

In another optional implementation, if the output end of the SPDT switch connected to the ID pin is connected to the negative input end of the comparator, and the reference voltage supply module is connected to the positive input end of the comparator, please refer to Figure 3, as shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module The first voltage is provided for the positive input terminal of the comparator, and the reference voltage supply module provides the reference voltage for the negative input terminal of the comparator. Since the first voltage is greater than the reference voltage, the output terminal of the comparator will output a low voltage.

Please refer to FIG. 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage for the positive input terminal of the comparator and the ID pin, At this time, the output terminal of the comparator will still output a low voltage.

Based on the device detection circuit shown in Figure 3, in one embodiment, detecting whether the voltage change value of the ID pin reaches a preset value includes:

Detecting whether the output voltage at the output terminal of the comparator changes, wherein, when the output voltage changes, it is determined that the voltage change value of the ID pin reaches a preset value.

In an optional implementation, if the output end of the SPDT switch connected to the ID pin is connected to the positive input end of the comparator, and the reference voltage supply module is connected to the negative input end of the comparator, please refer to the figure 3. As shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module is The positive input terminal of the comparator provides a first voltage, and the reference voltage supply module provides a reference voltage for the negative input terminal of the comparator. Since the first voltage is greater than the reference voltage, the output terminal of the comparator will output a high voltage.

Please refer to Figure 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage to the positive input terminal of the comparator and the ID pin , at this time, the output terminal of the comparator will still output a high voltage.

If the preset value is set to the voltage value itself of the first voltage, please refer to Figure 5, when an external device is connected to the USB interface of the electronic device, the ID pin of the USB interface and the positive pole of the comparator The input terminals are all grounded. At this time, the voltage of the positive input terminal will change from the first voltage to 0V (that is, the voltage change value of the ID pin reaches the preset value), and the output voltage of the comparator will change from high voltage to low voltage. . Therefore, when the electronic device detects that the output voltage at the output terminal of the comparator changes from a high voltage to a low voltage, it can determine that the voltage change value of the ID pin reaches a preset value.

In another optional implementation, if the output end of the SPDT switch connected to the ID pin is connected to the negative input end of the comparator, and the reference voltage supply module is connected to the positive input end of the comparator, please refer to Figure 3, as shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module The first voltage is provided for the positive input terminal of the comparator, and the reference voltage supply module provides the reference voltage for the negative input terminal of the comparator. Since the first voltage is greater than the reference voltage, the output terminal of the comparator will output a low voltage.

Please refer to FIG. 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage for the positive input terminal of the comparator and the ID pin, At this time, the output terminal of the comparator will still output a low voltage.

If the preset value is set to the voltage value itself of the first voltage, please refer to Figure 5, when an external device is connected to the USB interface of the electronic device, the ID pin of the USB interface and the positive pole of the comparator The input terminals are all grounded. At this time, the voltage of the positive input terminal will change from the first voltage to 0V (that is, the voltage change value of the ID pin reaches the preset value), and the output voltage of the comparator will change from low voltage to high voltage. . Therefore, when the electronic device detects that the output voltage at the output terminal of the comparator changes from a low voltage to a high voltage, it can determine that the voltage change value of the ID pin reaches a preset value.

Based on the device detection circuit described in FIG. 3 , in an embodiment, providing the ID pin with a second voltage for external device access detection includes:

The SPDT switch is controlled to connect the ID pin and the second voltage supply module, and the second voltage supply module provides the ID pin with a second voltage.

Wherein, please refer to FIG. 6, when providing the second voltage for the ID pin of the universal serial bus interface, the electronic device can control the single-pole double-throw switch to connect the ID pin and the second voltage supply module, and the second voltage provides The module provides the second voltage for the ID pin.

For example, the output voltage of the second voltage supply module is 3.3V. When the ID pin and the second voltage supply module are connected through a single-pole double-throw switch, the second voltage module will provide the first voltage of 3.3V for the ID pin. The second voltage is used to realize the access detection of the external equipment.

In an embodiment, after providing the ID pin with the second voltage for external device access detection, it further includes:

When it is detected that the current state of the ID pin is no longer grounded, the SPDT switch is controlled to connect the ID pin and the first voltage supply module, and the first voltage supply module provides the first voltage for the ID pin.

In the embodiment of the present application, when the electronic device detects that the current state of the ID pin is no longer grounded, it determines that the external device has been pulled out from its universal serial bus interface, and at this time controls the SPDT switch to turn on the ID pin. pin and the first voltage supply module, and the first voltage supply module provides the first voltage for the ID pin to detect the next access of the external device.

In one embodiment, after determining whether an external device is connected to the universal serial bus interface according to the current state of the ID pin, it also includes:

When an external device is connected to the universal serial bus interface, power is supplied to the external device through the universal serial bus interface;

Obtain the temperature value of the universal serial bus interface during the period of power supply to the external device;

When the obtained temperature value is within the preset temperature range, power supply to the external device is stopped.

In the embodiment of the present application, when the electronic device determines that an external device is connected to its universal serial bus interface, it establishes an electrical connection with the external device, and supplies power to the external device through the power pin of its universal serial bus interface.

It is easy to understand that if the temperature of the USB interface is too high, it may burn the USB interface and even damage the entire electronic device. However, when the electronic device supplies power to external devices through the USB interface, the temperature of the USB interface will rise rapidly. In order to avoid damage to the electronic equipment caused by power supply to the external equipment, in the embodiment of the present application, the electronic equipment obtains the universal serial bus voltage from the temperature sensor provided at the universal serial bus interface in real time during the period of supplying the power supply voltage to the external equipment. The temperature value of the interface, and after obtaining the temperature value of the universal serial bus interface, judge whether the temperature value is within the preset temperature range, wherein, when the temperature value is within the preset temperature range, it means that the universal serial bus If the temperature of the serial bus interface is too high, stop supplying power to the external device at this time, so as to prevent the temperature of the universal serial bus interface from continuing to rise.

Wherein, the preset temperature range can be set as [Tmin, +∞), and Tmin represents the lowest temperature value that may cause damage to the electronic device, which can be obtained through experiments in advance.

For example, the preset temperature range is set to [60°C, +∞), if the obtained temperature value of the universal serial bus interface is 37°C, the electronic device will continue to supply power to the external device; If the temperature value is 67°C, the electronic device stops supplying power to the external device.

In an embodiment, when the obtained temperature value is within the preset temperature range, power supply to the external device is stopped, including:

When the obtained temperature value is within the preset temperature range, a confirmation message input interface is displayed;

Stop supplying power to the external device when the input interface receives the input confirmation information based on the displayed confirmation information.

In this embodiment of the present application, the user determines whether to stop supplying power to the external device. For example, please refer to FIG. 7, when the electronic device obtains the temperature value of the universal serial bus interface and judges that the temperature value is within the preset temperature range, it displays a confirmation information input interface in the screen display area, and the confirmation information input interface Including "Yes" control and "No" control, as well as the prompt message "The current temperature is too high, do you want to disconnect the peripheral device" for prompting the user whether to disconnect the external device. The user can click the "Yes" control to enter the confirmation information , click the "No" control to enter the denial information. Wherein, if the electronic device receives confirmation information input by the user, it disconnects the electrical connection with the external device, and stops supplying power to the external device;

The device detection method of the present application will be further introduced below on the basis of the methods described in the above embodiments. Specifically, referring to FIG. 3 , the electronic device includes a universal serial bus interface, a single-pole double-throw switch, a first voltage supply module, a second voltage supply module, and a comparator. Wherein, the ID pin of the universal serial bus interface is electrically connected to the input end of the single-pole double-throw switch, and an output end of the single-pole double-throw switch is electrically connected to an input end of the comparator, and is also electrically connected to the first voltage supply module connected, the other output end of the single pole double throw switch is electrically connected to the second voltage supply module, the other input end of the comparator is electrically connected to the reference voltage supply module, and the reference voltage provided by the reference voltage supply module is lower than the first A first voltage provided by a voltage supply module, the first voltage provided by the first voltage supply module is lower than the second voltage provided by the second voltage supply module, please refer to Figure 8, the specific flow of the device detection method is as follows :

In step 201, the SPDT switch is controlled to connect the ID pin and the first voltage supply module, and the first voltage supply module provides the ID pin with a first voltage.

In the embodiment of the present application, the USB interface of the electronic device is in the form of a mini USB interface or a micro USB interface, which supports the OTG function. With the OTG function, electronic devices can work in two identities, "host" and "peripheral".

It should be noted that, in the embodiment of this application, the external device is connected to the electronic device as a "peripheral device", and correspondingly, the electronic device works as a "host". By connecting to the external device, the electronic device can communicate with the external device Perform data communication, or use external devices to expand its own functions. Wherein, the external device may be a USB flash drive, a mouse, a keyboard, a game controller, and other electronic devices.

For example, taking the electronic device as a mobile phone as an example, the user can connect the mouse to the universal serial bus interface of the mobile phone to operate the electronic device through the mouse; the user can also connect the USB flash drive to the universal serial bus interface of the mobile phone, Read the audio and video files in the U disk through the mobile phone, play the audio and video files, or store the files in the mobile phone to the U disk to realize file backup, etc.

In order to realize the OTG function, the universal serial bus interface of the electronic equipment is provided with 5 pins, and its pin definitions are shown in Table 1.

In the embodiment of the present application, in order to realize the access detection of the external device, the electronic device first provides the first voltage for the ID pin of the universal serial bus interface.

Wherein, please refer to FIG. 4, when providing the first voltage for the ID pin of the universal serial bus interface, the electronic device can control the single-pole double-throw switch to connect the ID pin and the first voltage supply module, and the first voltage provides The module provides the first voltage for the ID pin.

For example, the output voltage of the first voltage supply module is 0.5V. When the ID pin and the first voltage supply module are connected through a single-pole double-throw switch, the first voltage module will provide the first voltage of 0.5V for the ID pin. a voltage.

In an optional implementation, if the output end of the SPDT switch connected to the ID pin is connected to the positive input end of the comparator, and the reference voltage supply module is connected to the negative input end of the comparator, please refer to the figure 3. As shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module is The positive input terminal of the comparator provides a first voltage, and the reference voltage supply module provides a reference voltage for the negative input terminal of the comparator. Since the first voltage is greater than the reference voltage, the output terminal of the comparator will output a high voltage.

Please refer to FIG. 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage for the positive input terminal of the comparator and the ID pin, At this time, the output terminal of the comparator will still output a high voltage.

In another optional implementation, if the output end of the SPDT switch connected to the ID pin is connected to the negative input end of the comparator, and the reference voltage supply module is connected to the positive input end of the comparator, please refer to Figure 3, as shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module The first voltage is provided for the positive input terminal of the comparator, and the reference voltage supply module provides the reference voltage for the negative input terminal of the comparator. Since the first voltage is greater than the reference voltage, the output terminal of the comparator will output a low voltage.

Please refer to FIG. 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage for the positive input terminal of the comparator and the ID pin, At this time, the output terminal of the comparator will still output a low voltage.

In step 202, it is detected whether the output voltage at the output terminal of the comparator changes.

It should be noted that, as an external device as a "peripheral device", the ID pin of its universal serial bus interface is grounded. For example, the ID pin of the external device is grounded through a pull-down resistor, wherein the pull-down resistor can be a separate resistor , can also be composed of multiple resistors connected in series and/or in parallel.

In this way, when an external device is connected to the electronic device, the voltage on the ID pin of the electronic device will be pulled down by the ID pin of the external device. Therefore, in the embodiment of the present application, after the electronic device provides the first voltage to the ID pin, it can determine whether the USB interface of the electronic device is connected to an external device according to detecting the voltage change value of the ID pin.

In the embodiment of the present application, after providing the first voltage to the ID pin of the universal serial bus interface, the electronic device detects whether the voltage change value of the ID pin reaches a preset value, wherein, after detecting the voltage change of the ID pin When the value reaches the preset value, it is determined that there may be an external device connected to its universal serial bus interface. When it is detected that the voltage change value of the ID pin does not reach the preset value, it is determined that no external device is connected to its universal serial bus interface. .

As an implementation, after the electronic device provides the first voltage to the ID pin of its universal serial bus interface, it detects the voltage of the ID pin in real time to obtain the real-time voltage, and calculates the voltage between the first voltage and the real-time voltage Difference, the calculated voltage difference is used as the voltage change value of its ID pin.

It should be noted that since the ID pin of the external device is grounded, when the external device is connected to the USB interface of the electronic device, the ID pin of the electronic device will also be grounded, and the voltage of the ID pin will be pulled down to 0V . Therefore, in the embodiment of the present application, the preset value for judging whether the USB interface may be connected to an external device is set as the voltage value of the first voltage, for example, the electronic device is using the ID of the USB interface. When the provided first voltage is 0.5V, the aforementioned preset value is also configured as 0.5V.

In one embodiment, if the output terminal of the SPDT switch connected to the ID pin is connected to the positive input terminal of the comparator, and the reference voltage supply module is connected to the negative input terminal of the comparator, please refer to Figure 3, as As shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module is the comparator The positive input end provides a first voltage, and the reference voltage supply module provides a reference voltage for the negative input end of the comparator. Since the first voltage is greater than the reference voltage, the output end of the comparator will output a high voltage.

Please refer to Figure 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage to the positive input terminal of the comparator and the ID pin , at this time, the output terminal of the comparator will still output a high voltage.

If the preset value is set to the voltage value itself of the first voltage, please refer to Figure 5, when an external device is connected to the USB interface of the electronic device, the ID pin of the USB interface and the positive pole of the comparator The input terminals are all grounded. At this time, the voltage of the positive input terminal will change from the first voltage to 0V (that is, the voltage change value of the ID pin reaches the preset value), and the output voltage of the comparator will change from high voltage to low voltage. . Therefore, when the electronic device detects that the output voltage at the output terminal of the comparator changes from a high voltage to a low voltage, it can determine that the voltage change value of the ID pin reaches a preset value.

In another embodiment, if the output terminal of the SPDT switch connected to the ID pin is connected to the negative input terminal of the comparator, and the reference voltage supply module is connected to the positive input terminal of the comparator, please refer to FIG. 3 , As shown in Figure 3, when the SPDT switch does not connect the ID pin to the second power supply module, nor connects the ID pin to the positive input terminal of the comparator, the first voltage supply module is a comparator The positive input end of the comparator provides a first voltage, and the reference voltage supply module provides a reference voltage for the negative input end of the comparator. Since the first voltage is greater than the reference voltage, the output end of the comparator will output a low voltage.

Please refer to FIG. 4, when the SPDT switch connects the first voltage supply module to the ID pin, the first voltage supply module will simultaneously provide the first voltage for the positive input terminal of the comparator and the ID pin, At this time, the output terminal of the comparator will still output a low voltage.

If the preset value is set to the voltage value itself of the first voltage, please refer to Figure 5, when an external device is connected to the USB interface of the electronic device, the ID pin of the USB interface and the positive pole of the comparator The input terminals are all grounded. At this time, the voltage of the positive input terminal will change from the first voltage to 0V (that is, the voltage change value of the ID pin reaches the preset value), and the output voltage of the comparator will change from low voltage to high voltage. . Therefore, when the electronic device detects that the output voltage at the output terminal of the comparator changes from a low voltage to a high voltage, it can determine that the voltage change value of the ID pin reaches a preset value.

In step 203, when the output voltage changes, the SPDT switch is controlled to connect the ID pin and the second voltage supply module, and the second voltage supply module provides the ID pin with a second voltage.

In the embodiment of the present application, after the electronic device completes the detection of the voltage change value on its ID pin, and detects that the voltage change value reaches the preset value, it is determined that there may be an external device connected to its universal serial bus interface. , the ID pin is provided with a second voltage for external device access detection, that is, the ID pin is pulled up to a high voltage.

It should be noted that, in the embodiment of the present application, the first voltage previously provided for the ID pin is smaller than the second voltage currently provided for the ID pin, and the first voltage is much lower than the second voltage. For example, the first voltage provided by the electronic device to its ID pin is 0.5V, and when it is detected that the voltage change value of the ID pin reaches a preset value, the second voltage provided to its ID pin is 3.3V.

In the embodiment of the present application, after the electronic device completes the detection of the voltage change value on its ID pin, and detects that the voltage change value reaches the preset value, it is determined that there may be an external device connected to its universal serial bus interface. , the ID pin is provided with a second voltage for external device access detection, that is, the ID pin is pulled up to a high voltage.

It should be noted that, in the embodiment of the present application, the first voltage previously provided for the ID pin is smaller than the second voltage currently provided for the ID pin, and the first voltage is much smaller than the second voltage. For example, the first voltage provided by the electronic device to its ID pin is 0.5V, and when it is detected that the voltage change value of the ID pin reaches a preset value, the second voltage provided to its ID pin is 3.3V.

Wherein, please refer to FIG. 6, when providing the second voltage for the ID pin of the universal serial bus interface, the electronic device can control the single-pole double-throw switch to connect the ID pin and the second voltage supply module, and the second voltage provides The module provides the second voltage for the ID pin.

For example, the output voltage of the second voltage supply module is 3.3V. When the ID pin and the second voltage supply module are connected through a single-pole double-throw switch, the second voltage module will provide the first voltage of 3.3V for the ID pin. The second voltage is used to realize the access detection of the external equipment.

In step 204, it is detected whether the current state of the ID pin is grounded.

It should be noted that since the ID pin of the external device is grounded, when the external device is connected to the USB interface of the electronic device, the ID pin of the electronic device will also be grounded. When the universal serial bus interface of the electronic device is connected, the ID pin of the electronic device will be in a ground state.

Therefore, in the embodiment of the present application, it can be determined whether an external device is connected to the universal serial bus interface according to the current state of the ID pin. When the current state of the pin is grounded, it is determined that an external device is connected to the universal serial bus interface, and when the current state of the ID pin is not in the grounded state, it is determined that no external device is connected to the universal serial bus interface.

In step 205, when the current state of the ID pin is grounded, it is determined that an external device is connected to the USB interface, and power is supplied to the external device through the USB interface.

In the embodiment of the present application, when the electronic device determines that an external device is connected to its universal serial bus interface, it establishes an electrical connection with the external device, and supplies power to the external device through the power pin of its universal serial bus interface.

In step 206, during the period of supplying power to the external device, the temperature value of the universal serial bus interface is obtained;

It is easy to understand that if the temperature of the USB interface is too high, it may burn the USB interface and even damage the entire electronic device. However, when the electronic device supplies power to external devices through the USB interface, the temperature of the USB interface will rise rapidly. In order to avoid damage to the electronic equipment caused by power supply to the external equipment, in the embodiment of the present application, the electronic equipment obtains the universal serial bus voltage from the temperature sensor provided at the universal serial bus interface in real time during the period of supplying the power supply voltage to the external equipment. The temperature value of the interface to determine whether the temperature of the universal serial bus interface is too high.

In step 207, when the obtained temperature value is within the preset temperature range, power supply to the external device is stopped.

In the embodiment of the present application, after obtaining the temperature value of the universal serial bus interface, it is judged whether the temperature value is within the preset temperature range, wherein, when the temperature value is within the preset temperature range, it means that the universal serial bus If the temperature of the serial bus interface is too high, stop supplying power to the external device at this time, so as to prevent the temperature of the universal serial bus interface from continuing to rise.

Wherein, the preset temperature range can be set as [Tmin, +∞), and Tmin represents the lowest temperature value that may cause damage to the electronic device, which can be obtained through experiments in advance.

For example, the preset temperature range is set to [60°C, +∞), if the obtained temperature value of the universal serial bus interface is 37°C, the electronic device will continue to supply power to the external device; If the temperature value is 67°C, the electronic device stops supplying power to the external device.

In an embodiment, a device detection device is also provided, please refer to FIG. 9 , which is a schematic structural diagram of the device detection device provided in an embodiment of the present application. Wherein the device detection device is applied to electronic devices, the device detection device includes a voltage supply module 401, a voltage detection module 402, and a device identification module 403, as follows:

A voltage supply module 401, configured to provide a first voltage for the ID pin of the Universal Serial Bus interface;

A voltage detection module 402, configured to detect whether the voltage change value of the ID pin reaches a preset value;

The voltage supply module 401 is further configured to provide the ID pin with a second voltage for external device access detection when the voltage change value of the ID pin reaches a preset value, wherein the first voltage is smaller than the second voltage;

The device identification module 403 is configured to determine whether there is an external device connected to the universal serial bus interface according to the current state of the ID pin.

In one embodiment, a device detection circuit of an electronic device is provided. Please refer to FIG. groups and comparators. Wherein, the ID pin of the universal serial bus interface is electrically connected to the input end of the single-pole double-throw switch, and an output end of the single-pole double-throw switch is electrically connected to an input end of the comparator, and is also electrically connected to the first voltage supply module connected, the other output end of the single pole double throw switch is electrically connected to the second voltage supply module, the other input end of the comparator is electrically connected to the reference voltage supply module, and the reference voltage provided by the reference voltage supply module is lower than the first A first voltage provided by a voltage supply module, the first voltage provided by the first voltage supply module is lower than the second voltage provided by the second voltage supply module.

Based on the device detection circuit shown in FIG. 3, in an embodiment, the voltage supply module 401 is specifically used for:

The SPDT switch is controlled to connect the ID pin and the first voltage supply module, and the first voltage supply module supplies the ID pin with the first voltage.

Based on the device detection circuit shown in FIG. 3, in an embodiment, the voltage detection module 402 is specifically used for:

Detecting whether the output voltage at the output terminal of the comparator changes, wherein, when the output voltage changes, it is determined that the voltage change value of the ID pin reaches a preset value.

Based on the device detection circuit shown in FIG. 3, in an embodiment, the voltage supply module 401 is also specifically used for:

The SPDT switch is controlled to connect the ID pin and the second voltage supply module, and the second voltage supply module provides the ID pin with a second voltage.

In one embodiment, the device identification module 403 is specifically used to:

Detecting whether the current state of the ID pin is grounded, wherein, when the current state of the ID pin is grounded, it is determined that an external device is connected to the universal serial bus interface.

In an embodiment, the voltage supply module 401 is also used for:

When an external device is connected to the universal serial bus interface, power is supplied to the external device through the universal serial bus interface;

Obtain the temperature value of the universal serial bus interface during the period of power supply to the external device;

When the obtained temperature value is within the preset temperature range, power supply to the external device is stopped.

In an embodiment, the voltage supply module 401 is also specifically used for:

When the obtained temperature value is within the preset temperature range, a confirmation message input interface is displayed;

Stop supplying power to the external device when the input interface receives the input confirmation information based on the displayed confirmation information.

During specific implementation, each of the above modules can be implemented as an independent entity, or can be combined arbitrarily as the same or several entities. The specific implementation of each of the above units can refer to the previous embodiments, and will not be repeated here.

It can be seen from the above that the device detection device of this embodiment can provide the first voltage for the ID pin of the universal serial bus interface by the voltage supply module 401; whether the voltage change value of the ID pin is detected by the voltage detection module 402 reaches a preset value; When the voltage change value of the ID pin reaches a preset value, the voltage supply module 401 provides the ID pin with a second voltage for external device access detection, wherein the first voltage is less than the second voltage; the device identification module 403 Determine whether there is an external device connected to the USB interface according to the current state of the ID pin. In this scheme, by providing a low voltage for the ID pin of the universal serial bus interface, and according to whether the voltage change value of the ID pin reaches a preset value, it is judged whether the universal serial bus interface may be connected to an external device, Furthermore, when the USB interface may be connected to an external device, a high voltage for detecting the connection of the external device is provided to the ID pin, so as to realize the detection of the connection of the external device. Therefore, it is only necessary to provide a high voltage for the ID pin in a short period of time, and provide a low voltage for the ID pin in a relatively long period of time. Corrosion will be much lower than the corrosion caused by high voltage to the universal serial bus interface, and it can be almost ignored. Thus, the purpose of improving the service life of the universal serial bus interface can be achieved.

The embodiment of the present application also provides an electronic device. Referring to FIG. 10 , an electronic device 500 includes a processor 501 and a memory 502 . Wherein, the processor 501 is electrically connected with the memory 502 .

The processor 500 is the control center of the electronic device 500. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or loading computer programs stored in the memory 502 and calling data stored in the memory 502, the processor 500 executes electronic various functions of the device 500 and process data.

The memory 502 can be used to store software programs and modules, and the processor 501 executes various functional applications and data processing by running the computer programs and modules stored in the memory 502 . Memory 502 may mainly include a program storage area and a data storage area, wherein the program storage area may store operating systems, computer programs required by at least one function (such as sound playback function, image playback function, etc.); Data created by the use of electronic devices, etc. In addition, the memory 502 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices. Correspondingly, the memory 502 may further include a memory controller to provide the processor 501 with access to the memory 502 .

In the embodiment of the present application, the processor 501 in the electronic device 500 will follow the steps below to load the instructions corresponding to the process of one or more computer programs into the memory 502, and run the instructions stored in the memory 502 by the processor 501. The computer program in the computer, so as to realize various functions, as follows:

providing a first voltage for the ID pin of the universal serial bus interface;

Detect whether the voltage change value of the ID pin reaches the preset value;

When the voltage change value of the ID pin reaches a preset value, provide the ID pin with a second voltage for external device access detection, wherein the first voltage is smaller than the second voltage;

According to the current state of the ID pin, it is determined whether there is an external device connected to the universal serial bus interface.

As can be seen from the above, the embodiment of the present application provides a low voltage for the ID pin of the universal serial bus interface, and judges whether the universal serial bus interface may be connected according to whether the voltage change value of the ID pin reaches a preset value. The external device is connected, and then when the universal serial bus interface may be connected to the external device, a high voltage for the external device access detection is provided for the ID pin, so as to realize the external device access detection. Therefore, it is only necessary to provide a high voltage for the ID pin in a short period of time, and provide a low voltage for the ID pin in a relatively long period of time. Corrosion will be much lower than the corrosion caused by high voltage to the universal serial bus interface, and it can be almost ignored. Thus, the purpose of improving the service life of the universal serial bus interface can be achieved.

Please refer to FIG. 11 together. In some embodiments, the electronic device 500 may further include: a display 503 , a radio frequency circuit 504 , an audio circuit 505 , a power supply 506 and a device detection circuit 507 . Wherein, the display 503 , the radio frequency circuit 504 , the audio circuit 505 and the power supply 506 are respectively electrically connected to the processor 501 .

The display 503 can be used to display information input by or provided to the user and various graphical user interfaces, and these graphical user interfaces can be composed of graphics, text, icons, videos and any combination thereof. The display 503 may include a display panel. In some implementation manners, the display panel may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD) or an organic light-emitting diode (Organic Light-Emitting Diode, OLED).

The radio frequency circuit 504 can be used to send and receive radio frequency signals to establish wireless communication with network equipment or other electronic equipment through wireless communication, and to send and receive signals with network equipment or other electronic equipment.

The audio circuit 505 can be used to provide an audio interface between the user and the electronic device through a speaker or a microphone.

The power supply 506 may be used to power various components of the electronic device 500 . In some embodiments, the power supply 506 may be logically connected to the processor 501 through a power management system, so as to implement functions such as charging, discharging, and power consumption management through the power management system.

Please refer to FIG. 3 , the device detection circuit includes a 507 USB interface, a SPDT switch, a first voltage supply module, a second voltage supply module and a comparator. Wherein, the ID pin of the universal serial bus interface is electrically connected to the input end of the single-pole double-throw switch, and an output end of the single-pole double-throw switch is electrically connected to an input end of the comparator, and is also electrically connected to the first voltage supply module connected, the other output end of the single pole double throw switch is electrically connected to the second voltage supply module, the other input end of the comparator is electrically connected to the reference voltage supply module, and the reference voltage provided by the reference voltage supply module is lower than the first A first voltage provided by a voltage supply module, the first voltage provided by the first voltage supply module is lower than the second voltage provided by the second voltage supply module.

Although not shown in FIG. 11 , the electronic device 500 may also include a camera, a Bluetooth module, etc., which will not be repeated here.

In some embodiments, when providing the first voltage to the ID pin of the universal serial bus interface, the processor 501 may perform the following steps:

The SPDT switch is controlled to connect the ID pin and the first voltage supply module, and the first voltage supply module supplies the ID pin with the first voltage.

In some implementations, when detecting whether the voltage change value of the ID pin reaches a preset value, the processor 501 may perform the following steps:

Detecting whether the output voltage at the output terminal of the comparator changes, wherein, when the output voltage changes, it is determined that the voltage change value of the ID pin reaches a preset value.

In some implementation manners, when the ID pin is provided with the second voltage for external device access detection, the processor 501 may perform the following steps:

The SPDT switch is controlled to connect the ID pin and the second voltage supply module, and the second voltage supply module provides the ID pin with a second voltage.

In some embodiments, when determining whether an external device is connected to the USB interface according to the current state of the ID pin, the processor 501 may perform the following steps:

Detecting whether the current state of the ID pin is grounded, wherein, when the current state of the ID pin is grounded, it is determined that an external device is connected to the universal serial bus interface.

In some embodiments, after determining whether an external device is connected to the USB interface according to the current state of the ID pin, the processor 501 may also perform the following steps:

When an external device is connected to the universal serial bus interface, power is supplied to the external device through the universal serial bus interface;

Obtain the temperature value of the universal serial bus interface during the period of power supply to the external device;

When the obtained temperature value is within the preset temperature range, power supply to the external device is stopped.

In some implementations, when the acquired temperature value is within the preset temperature range, when power supply to the external device is stopped, the processor 501 may further perform the following steps:

When the obtained temperature value is within the preset temperature range, a confirmation message input interface is displayed;

Stop supplying power to the external device when the input interface receives the input confirmation information based on the displayed confirmation information.

An embodiment of the present application also provides a storage medium, the storage medium stores a computer program, and when the computer program is run on a computer, the computer is made to execute the device detection method in any of the above embodiments, for example: The ID pin of the universal serial bus interface provides a first voltage; detects whether the voltage change value of the ID pin reaches a preset value; when the voltage change value of the ID pin reaches a preset value, provides an external voltage for the ID pin The device accesses the detected second voltage, wherein the first voltage is lower than the second voltage; and according to the current state of the ID pin, it is determined whether there is an external device connected to the universal serial bus interface.

In the embodiment of the present application, the storage medium may be a magnetic disk, an optical disk, a read only memory (Read Only Memory, ROM), or a random access memory (Random Access Memory, RAM), or the like.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

It should be noted that, for the device detection method of the embodiment of the present application, those skilled in the art can understand that all or part of the flow of the device detection method of the embodiment of the present application can be completed by controlling the relevant hardware through a computer program , the computer program may be stored in a computer-readable storage medium, such as stored in a memory of an electronic device, and executed by at least one processor in the electronic device, and the execution process may include, for example, the device detection method Example flow. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, and the like.

For the equipment detection device of the embodiment of the present application, its various functional modules may be integrated into one processing chip, or each module may exist separately physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium, such as read-only memory, magnetic disk or optical disk, etc. .

A device detection method, device, storage medium, and electronic equipment provided by the embodiments of the present application have been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only It is used to help understand the method and its core idea of this application; at the same time, for those skilled in the art, according to the idea of this application, there will be changes in the specific implementation and application scope. In summary, this specification The content should not be construed as a limitation of the application.

Claims (10)

1. A device detection method, characterized in that, comprising: providing a first voltage for the ID pin of the universal serial bus interface; Detecting whether the voltage change value of the ID pin reaches a preset value; When the voltage change value reaches the preset value, provide the ID pin with a second voltage for external device access detection, wherein the first voltage is smaller than the second voltage; According to the current state of the ID pin, determine whether there is an external device connected to the universal serial bus interface. 2. The device detection method according to claim 1, wherein the ID pin is electrically connected to an input end of a SPDT switch, an output end of the SPDT switch is connected to an input end of a comparator Electrically connected, and also electrically connected to the first voltage supply module, the other output end of the SPDT switch is electrically connected to the second voltage supply module, and the other input end of the comparator is electrically connected to the reference voltage supply module Electrically connected, the reference voltage provided by the reference voltage supply module is lower than the first voltage, and detecting whether the voltage change value of the ID pin reaches a preset value includes: Detecting whether the output voltage at the output terminal of the comparator changes, wherein when the output voltage changes, it is determined that the voltage change value reaches the preset value. 3. The device detection method according to claim 2, wherein the first voltage is provided for the ID pin of the Universal Serial Bus interface, comprising: controlling the SPDT switch to connect the ID pin and the first voltage supply module, and the first voltage supply module provides the ID pin with a first voltage. 4. The device detection method according to claim 2, wherein providing the ID pin with a second voltage comprises: controlling the SPDT switch to connect the ID pin and the second voltage supply module, and the second voltage supply module provides a second voltage for the ID pin. 5. The device detection method according to claim 2, wherein, according to the current state of the ID pin, determining whether an external device is connected to the universal serial bus interface comprises: Detecting whether the current state of the ID pin is a grounded state, wherein, when the current state is a grounded state, it is determined that an external device is connected to the universal serial bus interface. 6. The device detection method according to any one of claims 1-5, wherein, after determining whether an external device is connected to the Universal Serial Bus interface according to the current state of the ID pin, further comprising: : When an external device is connected to the universal serial bus interface, supply power to the external device through the universal serial bus interface; During the period of supplying power to the external device, acquiring the temperature value of the USB interface; When the temperature value is within a preset temperature range, power supply to the external device is stopped. 7. The device detection method according to claim 6, wherein when the temperature value is within a preset temperature range, stopping power supply to the external device comprises: When the temperature value is within the preset temperature range, display a confirmation information input interface; When the input confirmation information is received based on the confirmation information input interface, power supply to the external device is stopped. 8. An equipment detection device, characterized in that it comprises: A voltage supply module, used to provide the first voltage for the ID pin of the universal serial bus interface; A voltage detection module, configured to detect whether the voltage change value of the ID pin reaches a preset value; The voltage supply module is further configured to provide the ID pin with a second voltage for external device access detection when the voltage change value reaches the preset value, wherein the first voltage is less than the preset value. the second voltage; The device identification module is used to determine whether there is an external device connected to the universal serial bus interface according to the current state of the ID pin. 9. A storage medium on which a computer program is stored, wherein when the computer program is run on a computer, the computer is made to execute the device detection method according to any one of claims 1 to 7. 10. An electronic device comprising a processor and a memory, the memory stores a computer program, wherein the processor is used to execute the computer program described in any one of claims 1 to 7 by calling the computer program device detection method.