WO2023011351A1

WO2023011351A1 - Universal serial bus power delivery-based communication method and related apparatus

Info

Publication number: WO2023011351A1
Application number: PCT/CN2022/108982
Authority: WO
Inventors: 汤厚涛
Original assignee: 深圳英集芯科技股份有限公司
Priority date: 2021-08-03
Filing date: 2022-07-29
Publication date: 2023-02-09
Also published as: CN113326222B; CN113326222A; CN115706437A

Abstract

A universal serial bus (USB) power delivery-based communication method and apparatus. The method comprises: firstly, receiving a hard reset signal from a charging device (120), so as to perform initialization processing (301), the initialization processing comprising suspending a power supply communication link with the charging device (120); and then adjusting a power supply voltage to a first voltage value within a first time period (302); next, upon detecting that the first voltage value is not adjusted to a second voltage value within a second time period, determining that an adapter (110) is in a hard reset abnormal state, and enabling the communication function of a first physical layer of the adapter (110) (303); and finally, sending a data packet to the charging device (120) to re-establish the power supply communication link (304). According to the USB power delivery-based communication method and apparatus, the communication function of the adapter (110) and the charging device (120) can be automatically enabled when an anomaly occurs in the USB power delivery hard reset procedure, the procedure is prevented from being interrupted, and the charging compatibility is improved.

Description

Communication method and related device based on universal serial bus power supply

This application claims the priority of the Chinese patent application with the application number 2021108834374 and the application title "communication method and related device based on universal serial bus power supply" filed with the China Patent Office on August 3, 2021, the entire content of which is incorporated by reference incorporated in this application.

technical field

The present application relates to the technical field of power supply communication, in particular to a communication method and related devices based on universal serial bus power supply.

Background technique

With the rapid popularization of USB Power Delivery, more and more charging devices begin to support USB Power Delivery charging technology. However, the USB Power Delivery chargers on the market are uneven, which will cause device charging compatibility issues. Some chargers still exist. When the charger receives a hard reset signal, the serial bus voltage VBUS will not be powered off, causing the charging device to be disconnected and the communication process to be wrong.

Contents of the invention

This application proposes a communication method based on universal serial bus power supply and related devices, which can automatically enable the communication function of the adapter and the charging device when an abnormal situation occurs during the USB Power Delivery hard reset process, prevent the process from getting stuck, and improve Charging compatibility.

In the first aspect, the embodiment of the present application provides a communication method based on universal serial bus power supply, which is applied to an adapter, and the method includes:

receiving a hard reset signal from a charging device to perform an initialization process that includes suspending a power supply communication link with the charging device;

adjusting the supply voltage to a first voltage value within a first period of time;

When it is detected that the first voltage value is not adjusted to the second voltage value within the second period of time, it is determined that the adapter is in a hard reset abnormal state, and the communication function of the first physical layer of the adapter is enabled;

sending a data packet to the charging device to re-establish the power supply communication link.

In the second aspect, the embodiment of the present application provides a communication method based on universal serial bus power supply, which is applied to a charging device, and the method includes:

sending a hard reset signal to the adapter and suspending the powered communication link with the adapter;

When detecting that the adapter is in a hard reset abnormal state, enabling the communication function of the second physical layer of the charging device after a third period of time;

A data packet is received from the adapter to re-establish the powered communication link.

In the third aspect, the embodiment of the present application provides a communication device powered by a universal serial bus, which is applied to an adapter, and the communication device includes:

a receiving unit, configured to receive a hard reset signal from the charging device to perform initialization processing, the initialization processing including suspending the power supply communication link with the charging device;

a voltage adjustment unit, configured to adjust the supply voltage to a first voltage value within a first period of time;

A first enabling unit, configured to determine that the adapter is in a hard reset abnormal state when detecting that the first voltage value has not been adjusted to a second voltage value within a second period of time, and enable the first physical layer of the adapter communication function;

A first communication unit, configured to send a data packet to the charging device to re-establish the power supply communication link.

In a fourth aspect, the embodiment of the present application provides a communication device powered by a universal serial bus, which is applied to a charging device, and the communication device includes:

a sending unit, configured to send a hard reset signal to the adapter, and suspend the power supply communication link with the adapter;

A second enabling unit, configured to enable the communication function of the second physical layer of the charging device after a third period of time when it is detected that the adapter is in a hard reset abnormal state;

The second communication unit is configured to receive a data packet from the adapter to re-establish the power supply communication link.

In a fifth aspect, the embodiment of the present application provides an adapter, the adapter includes a processor, a memory, and one or more programs, the one or more programs are stored in the memory, and configured by the The processor is executed, and the program includes instructions for executing the steps in the method according to any one of the first aspects of the embodiments of the present application.

In a sixth aspect, an embodiment of the present application provides a charging device, the charging device includes a processor, a memory, and one or more programs, and the one or more programs are stored in the memory and configured Executed by the processor, the program includes instructions for executing the steps in the method according to any one of the second aspect of the embodiments of the present application.

In a seventh aspect, the embodiment of the present application provides a computer storage medium, the computer storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes The method according to any one of the first aspect and/or the second aspect of the embodiment of the present application.

In an eighth aspect, the embodiment of the present application provides a computer product, wherein the above-mentioned computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the above-mentioned computer program is operable to enable the computer to execute the Part or all of the steps described in any method of the first aspect and/or the second aspect. The computer program product may be a software installation package.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application 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 are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a kind of output voltage curve diagram based on the universal serial bus power supply process provided by the embodiment of the present application;

FIG. 2 is a schematic diagram of a system architecture of a communication method based on universal serial bus power supply provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a communication method based on universal serial bus power supply provided by an embodiment of the present application;

FIG. 4 is a schematic flowchart of another communication method based on universal serial bus power supply provided by the embodiment of the present application;

FIG. 5 is a schematic flowchart of another communication method based on USB power supply provided by the embodiment of the present application;

FIG. 6 is a block diagram of functional units of a communication device powered by a universal serial bus provided by an embodiment of the present application;

FIG. 7 is a block diagram of functional units of another universal serial bus-based communication device provided by an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than 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 comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or devices.

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.

Firstly, the background technology in the embodiments of the present application will be described.

Universal Serial Bus power supply: USB Power Delivery, referred to as USB PD, the USB PD protocol is a USB power supply extension standard that uses a USB (Universal Serial Bus) cable to receive power at a maximum of 100W.

Downstream Facing Port (DFP), can be understood as Host, DFP provides VBUS, which can provide data. In the protocol specification, DFP specifically refers to the downlink transmission of data, and generally refers to the equipment for downlink data and external power supply. In this embodiment of the application, an adapter is taken as an example for description.

Upstream Facing Port (UFP) can be understood as Device, UFP takes power from VBUS and can provide data. Typical devices are U disk, mobile hard disk, etc.

Dual Role Port can be used as a device that provides power or as a device that receives power.

VBUS is the cable for the adapter to supply power to the charging device, and the VBUS voltage is the power supply voltage.

During the USB PD process, sometimes it is necessary to hard reset the adapter and the charging device. For example, as shown in Figure 1, the charging device sends a Hard reset command to the adapter. When the adapter receives the Hard reset command, it can Adjust the output voltage to vSafe5V within t1, vSafe5V is a term in the protocol standard, generally 4.75V to 5.25V, and then adjust the output voltage from vSafe5V to vSafe0V within t2, where vSafe0V is generally 0 to 0.8V , I won’t go into details here, and finally, after waiting for t3, restore the output voltage to vSafe5V to complete the hard reset process, so as to resume subsequent USB PD communication.

In some cases, a hard reset exception may occur. For example, the output voltage does not drop from vSafe5V to vSafe0V within t2, but continues to maintain vSafe5V, because the charging device will temporarily turn off the communication function after sending the Hard reset command. And the hard reset process of the adapter is detected. When it is detected that the output voltage has not dropped from vSafe5V to vSafe0V, it cannot jump to the next process, that is, the subsequent USB PD communication cannot be performed, resulting in compatibility problems.

In order to solve the above problems, the embodiment of the present application provides a communication method based on universal serial bus power supply and related devices, which can automatically detect the hard reset abnormality in the process of USB PD, and optimize the USB PD without increasing the hardware cost. process to improve compatibility.

The system architecture of a communication method based on universal serial bus power supply in the embodiment of the present application will be described below in conjunction with FIG. 2. FIG. 2 is the system architecture of a communication method based on universal serial bus power supply provided in the embodiment of the present application Schematic diagram, the system architecture includes an adapter 110 and a charging device 120 .

Wherein, the above-mentioned adapter 110 is used as a source, and can supply power to the charging device 120 , and the above-mentioned charging device 120 is used as a sink, and the above-mentioned adapter 110 can be connected to the above-mentioned charging device 120 through a cable. The adapter 110 and the charging device 120 can apply the relevant protocols of the USB PD communication standard. In the embodiment of the present application, there is no further improvement on the hardware of the adapter 110 and the charging device 120. You can refer to the structure of the existing adapter and charging device. This is not specifically limited.

For ease of understanding, the above-mentioned adapter 110 and the above-mentioned charging device 120 are described below from the software architecture level. The above-mentioned adapter 110 may include a first physical layer 111, a first protocol layer 112 and a first policy engine 113. The above-mentioned charging device 120 may include The second physical layer 121 , the second protocol layer 122 and the second policy engine 123 . The charging device 120 can send a hard reset Hard reset command through the second policy engine 123, and transmit it to the adapter 110 through the second protocol layer 122 and the second physical layer 121 in turn, specifically, the first physical layer 111, the first protocol layer 112 is transmitted to the first policy engine 113, and the adapter 110 can execute a corresponding hard reset process after receiving the Hard reset command. The specific process will not be described in detail here, and refer to the subsequent description of the communication method based on USB power supply.

It should be noted that a hard reset is not required during normal USB PD communication between the adapter 110 and the charging device 120, and the hard reset process is performed only when an abnormal situation occurs and the method provided in the embodiment of this application is applicable.

In combination with the above system architecture, a communication method based on universal serial bus power supply in the embodiment of the present application is further described in conjunction with Fig. 3, and Fig. 3 is a flow chart of a communication method based on universal serial bus power supply provided in the embodiment of the present application Schematic diagram, the communication method is applicable to the adapter, including the following steps:

Step 301, receiving a hard reset signal from a charging device for initialization processing.

Wherein, the initialization process includes suspending the power supply communication link with the charging device.

Specifically, the hard reset signal from the charging device may be received through the first physical layer, and when receiving the hard reset signal, the first physical layer transmits a first reception message to the first protocol layer of the adapter, and closes the The communication function of the first physical layer resets the first message identification counter Message ID Counter and the first retransmission counter Retry Counter through the first protocol layer, wherein the first received message is used to indicate that the hard reset has been received signal, the first message identification counter MessageIDCounter is used to record the number of times of the power supply communication link, i.e. MessageID, and the first retransmission counter RetryCounter is used to record the number of retransmissions of the power supply communication link, here because The first message identification counter Message ID Counter and the first retransmission counter Retry Counter have been reset, so the count and the number of retransmissions all become zero, which can be understood as initialization processing, and then, through the first protocol layer to the described A first policy engine of the adapter transmits the first received message.

It can be seen that by receiving the hard reset signal from the charging device for initialization processing, the counting content can be reset, so that the USB PD communication can be restarted later.

Step 302, adjusting the supply voltage to a first voltage value within a first period of time.

Wherein, the first timer may be started by the first policy engine, and the power supply voltage is adjusted to the first voltage value within the first period recorded by the first timer, and the first timer It can be NoResponseTimer, when the first strategy engine receives the first reception message and determines that the Hard reset command has been received, the first timer can be started, the first timer can be timed for the first period, and the power supply voltage needs to be at the first time. During the time period, the voltage decreases to the first voltage value, which may be Vsafe5V in the PD communication standard.

Step 303, when it is detected that the first voltage value is not adjusted to the second voltage value within the second time period, determine that the adapter is in a hard reset abnormal state, and enable the communication function of the first physical layer of the adapter.

Wherein, the above-mentioned first timer can set a second time period, and when the first voltage value is not adjusted to the second voltage value within the second time period recorded by the first timer, it is determined that the The adapter is in the abnormal state of hard reset, and when it is in the abnormal state of hard reset, the communication function of the first physical layer is enabled through the first policy engine, and the above-mentioned second voltage value may be Vsafe0V in the PD communication standard.

In a possible embodiment, when the first voltage value is adjusted to the second voltage value within the second period recorded by the first timer, the hard reset is normal, and the subsequent process is continued Specifically, when the first voltage value is adjusted to the second voltage value within the second time period, the first policy engine may transmit a first reset message to the first protocol layer, so The first reset message is used to indicate that the power supply reset in the hard reset is completed;

Further transmitting a second reset message to the first physical layer through the first protocol layer, and enabling the communication function of the first physical layer to re-establish the power supply communication link, the second reset message uses to indicate that the hard reset is complete.

It can be seen that when it is detected that the first voltage value has not been adjusted to the second voltage value within the second period of time, it is determined that the adapter is in a hard reset abnormal state, and the communication function of the first physical layer of the adapter is enabled. After a hard reset abnormality is detected, the communication function of the first physical layer is automatically restarted, which facilitates the advancement of the subsequent process, prevents the process from getting stuck, and reduces the compatibility problem in the USB PD process.

Step 304, sending a data packet to the charging device to re-establish the power supply communication link.

Wherein, the data packet may be transmitted to the first protocol layer through the first policy engine, and the data packet may be a source cap packet;

Specifically, a second timer may be started by the first protocol layer, and the data packet may be transmitted to the first physical layer, and the second timer is used to indicate a cyclic redundancy check (Cyclic Redundancy Check, CRC ), wherein the second timer can be CRCReceiveTimer, the duration of the third period can be 0.9-1.1mS, and the second timer can be used to prompt the loss of the Souce cap information sent, for example, in After sending the Souce cap message, if the GoodCRC message from the other party is not received within the third period of the second timer, that is, 0.9 ~ 1.1 mS, it is considered that the message has failed to be sent, and the Souce cap message is resent;

then sending the data packet to the charging device through the first physical layer;

When receiving the second message fed back by the charging device within the third time period, turn off the first timer and the second timer, and control the message identification counter to increase a count, so as to complete the power supply communication link.

It can be seen that through the above method, the adapter can automatically enable the communication function of the first physical layer when the hard reset is abnormal, and the driving process is advanced, which greatly increases the compatibility of the USB PD process.

Another communication method based on USB power supply in the embodiment of the present application will be described below in conjunction with FIG. 4. FIG. 4 is another communication method based on Universal Serial Bus power supply provided in the embodiment of the application, which is applied to charging equipment , including the following steps:

Step 401, sending a hard reset signal to the adapter, and suspending the power supply communication link with the adapter.

Wherein, the hard reset signal may be transmitted to the second protocol layer of the charging device through the second policy engine of the charging device, and the second policy engine may be Policy Engine;

The second message identification counter and the second retransmission counter are reset through the second protocol layer, and the hard reset signal is transmitted to the second physical layer, and the second message identification counter is used to record the power supply communication The number of times of the link, the second retransmission counter is used to record the number of retransmissions of the power supply communication link, and the second message identification counter Message ID Counter is used to record the number of times of the power supply communication link, i.e. Message ID, the second retransmission counter Retry Counter is used to record the number of retransmissions of the power supply communication link, here because the second message identification counter Message ID Counter and the second retransmission counter Retry Counter have been reset, so the count and the number of retransmissions all become zero;

Further, sending the hard reset signal to the adapter through the second physical layer to close the communication function of the second physical layer.

Step 402, when it is detected that the adapter is in a hard reset abnormal state, enabling the communication function of the second physical layer of the charging device after a third period of time.

Wherein, the charging device can detect the power supply voltage of the adapter in the first period and the second period;

determining that the adapter is in the hard reset abnormal state when the supply voltage is not a second voltage value at the end of the second period;

The third timer is started by the second physical layer, and the communication function of the second physical layer is enabled after the third period recorded by the third timer, where the third period can be the same as that in FIG. 1 The duration of t3 in is the same, for example, the third period may be 800ms.

It can be understood that when it is detected that the power supply voltage does not drop from Vsafe5V to Vsafe0V within the second time period, it can be determined that the adapter is in a hard reset abnormal state, and the second policy engine informs the second protocol layer that the charging device has been reset, waiting for the first After three periods, the communication function of the second physical layer is forcibly enabled.

It can be seen that by automatically detecting the change of the power supply voltage of the adapter, it can be determined whether the hard reset process of the adapter is abnormal, and the communication function of the second physical layer is automatically enabled when the hard reset is abnormal, preventing the USB PD process from getting stuck, which greatly improves the USB Compatibility of PD procedure.

Step 403, receiving a data packet from the adapter to re-establish the power supply communication link.

Wherein, the data packet from the adapter may be received through the second physical layer, and the data packet may be a source cap packet;

Save the message identifier MessageID through the second protocol layer, and perform a cyclic redundancy check on the data packet to obtain a check result, and the check result includes pass and fail;

When the verification result is passed, the verification result GoodCRC is transmitted to the second physical layer through the second protocol layer;

The check result GoodCRC is fed back to the adapter through the second physical layer, so as to complete the power supply communication link.

It can be seen that through the above method, the charging device can automatically enable the communication function of the second physical layer when the hard reset is abnormal, which greatly improves the compatibility of the USB PD process.

For ease of understanding, another communication method based on USB power supply in the embodiment of the present application will be described below in conjunction with FIG. 5. FIG. Schematic diagram of the process, which is applied to adapters and charging devices, and specifically includes the following steps:

Step 501, the second policy engine sends a hard reset signal to the second protocol layer;

Step 502, the second protocol layer transmits a hard reset signal to the second physical layer, and resets the second message identification counter and the second retransmission counter;

Step 503, the second physical layer transmits a hard reset signal to the first physical layer, and closes its own communication function;

Step 504, after receiving the hard reset signal, the first physical layer transmits the first receiving message to the first protocol layer, and closes its own communication function;

Wherein, the first receiving message is used to indicate that a hard reset signal has been received;

Step 505, the first protocol layer transmits the first received message to the first policy engine, and resets the first message identification counter and the first retransmission counter;

Step 506, the first strategy engine starts a first timer, controls the power supply voltage to be powered down to Vsafe5V in the first period, and is powered down to Vsafe0V in the second period;

Step 507, when the power is not down to Vsafe0V within the second time period, forcibly enable the communication function of the first physical layer through the first protocol layer;

Step 508, the second policy engine informs the second protocol layer that the charging device has recovered;

Step 509, when it is detected that the adapter is in the hard reset abnormal state, start a third timer through the second protocol layer, and force enable the communication function of the second physical layer after the third time period to complete the hard reset process.

In one possible embodiment, USB PD communication can be re-established after the hard reset is complete. The specific steps are as follows:

Step 510, the first policy engine sends a Soucecap packet to the first protocol layer;

Step 511, the first protocol layer starts the second timer CRC receive timer, and sends the Souce cap packet to the first physical layer;

Step 512, the first physical layer sends a Source cap packet to the second physical layer and performs a CRC check;

Step 513, the second physical layer sends a source cap packet to the second protocol layer;

Step 514, the second protocol layer informs the second strategy engine that the source cap packet has been received, and the source cap packet is verified;

Step 515, the second protocol layer sends a GoodCRC message to the second physical layer;

Step 516, the second physical layer transmits a GoodCRC message to the first physical layer;

Step 517, the first physical layer transmits the GoodCRC message to the first protocol layer;

Step 518, the first protocol layer transmits the GoodCRC message to the first policy engine, and stops the second timer;

Step 519, the first policy engine controls the first message identification counter to add one, and the USB PD communication is established successfully.

For steps not described in detail above, reference may be made to all or part of the steps of the method described in FIG. 3 and FIG. 4 , and details are not repeated here.

It can be seen that through the above method, the USB Power Delivery process can be optimized without increasing the hardware cost. When the normal Hard reset process at the source end is not detected, the sink end process of the charging device can run normally, thereby increasing the USB Power Delivery process. Delivery charging device compatibility.

The foregoing mainly introduces the solutions of the embodiments of the present application from the perspective of executing the process on the method side. It can be understood that, in order to realize the above functions, the electronic device includes hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the electronic device into functional units according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.

In the case of dividing each functional module corresponding to each function, a communication device based on universal serial bus power supply in the embodiment of the application will be described in detail below in conjunction with FIG. 6. FIG. 6 is a communication device based on A block diagram of the functional units of the USB-powered communication device 600, the device is applied to an adapter, and the device includes:

The receiving unit 610 is configured to receive a hard reset signal from the charging device to perform initialization processing, the initialization processing including suspending the power supply communication link with the charging device;

A voltage adjustment unit 620, configured to adjust the supply voltage to a first voltage value within a first period of time;

The first enabling unit 630 is configured to determine that the adapter is in a hard reset abnormal state when detecting that the first voltage value has not been adjusted to a second voltage value within a second period of time, and enable the first physical The communication function of the layer;

The first communication unit 640 is configured to send a data packet to the charging device to re-establish the power supply communication link.

In the case of dividing each functional module corresponding to each function, another communication device based on universal serial bus power supply in the embodiment of the application will be described in detail below in conjunction with FIG. 7. FIG. 7 is another communication device provided by the embodiment of the application A block diagram of functional units of a communication device 700 powered by a universal serial bus, the device is applied to a charging device, and the device includes:

a sending unit 710, configured to send a hard reset signal to the adapter, and suspend the power supply communication link with the adapter;

The second enabling unit 720 is configured to enable the communication function of the second physical layer of the charging device after a third period of time when it is detected that the adapter is in a hard reset abnormal state;

The second communication unit 730 is configured to receive a data packet from the adapter to re-establish the power supply communication link.

Wherein, all relevant content of each step involved in the above-mentioned method embodiment can be referred to the function description of the corresponding function module, and will not be repeated here.

The embodiment of the present application also provides an adapter, the adapter includes a processor, a memory, and one or more programs, the one or more programs are stored in the memory, and configured by the processor Execution, the program includes instructions for executing the steps in the method as described in any one of FIG. 3 .

An embodiment of the present application provides a charging device, the charging device includes a processor, a memory, and one or more programs, the one or more programs are stored in the memory, and configured to be processed by the Executed by a computer, the program includes instructions for executing the steps in the method as described in any one of FIG. 4 .

An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables the computer to execute some or all of the steps of any method described in the above method embodiments , the above-mentioned computer includes electronic equipment.

An embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the computer to execute any one of the methods described in the above method embodiments. Some or all steps of the method. The computer program product may be a software installation package.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Depending on the application, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by this application.

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.

In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical or other forms.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the above-mentioned integrated units are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory. Several instructions are included to make a computer device (which may be a personal computer, server or network device, etc.) execute all or part of the steps of the above-mentioned methods in various embodiments of the present application. The aforementioned memory includes: various media that can store program codes such as U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, and the memory can include: a flash disk , Read-only memory (English: Read-Only Memory, referred to as: ROM), random access device (English: Random Access Memory, referred to as: RAM), magnetic disk or optical disc, etc.

The embodiments of the present application have been introduced in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application; meanwhile, for Those skilled in the art will have changes in specific implementation methods and application scopes based on the ideas of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

A kind of communication method based on universal serial bus power supply, it is characterized in that being applied to adapter, described method comprises:

receiving a hard reset signal from a charging device to perform an initialization process that includes suspending a power supply communication link with the charging device;

adjusting the supply voltage to a first voltage value within a first period of time;

When it is detected that the first voltage value is not adjusted to the second voltage value within the second period of time, it is determined that the adapter is in a hard reset abnormal state, and the communication function of the first physical layer of the adapter is enabled;

sending a data packet to the charging device to re-establish the power supply communication link.
The method according to claim 1, wherein the receiving a hard reset signal from the charging device to perform initialization processing includes:

When receiving a hard reset signal from the charging device through the first physical layer, transmit a first reception message to the first protocol layer of the adapter, close the communication function of the first physical layer, and the first The receiving message is used to indicate that the hard reset signal is received;

The first message identification counter and the first retransmission counter are reset by the first protocol layer, the first message identification counter is used to record the number of times of the power supply communication link, and the first retransmission counter is used to record The number of retransmissions of the power supply communication link;

The first received message is transmitted to a first policy engine of the adapter via the first protocol layer.
The method according to claim 2, wherein the adjusting the supply voltage to the first voltage value within the first period of time comprises:

A first timer is started by the first policy engine, and the supply voltage is adjusted to the first voltage value within the first period recorded by the first timer.
The method according to claim 3, wherein when the first voltage value cannot be adjusted to the second voltage value within the second time period, it is determined that the adapter is in a hard reset abnormal state, and enabling the The communication functions of the physical layer of the adapter, including:

determining that the adapter is in the hard reset abnormal state when the first voltage value is not adjusted to the second voltage value within the second period recorded by the first timer;

The communication function of the first physical layer is enabled by the first policy engine.
The method according to claim 3, wherein the sending a data packet to the charging device to re-establish the power supply communication link comprises:

transmitting the data packet to the first protocol layer through the first policy engine;

Start a second timer through the first protocol layer, and transmit the data packet to the first physical layer, where the second timer is used to indicate a third period of cyclic redundancy check;

sending the data packet to the charging device through the first physical layer;

When receiving the second message fed back by the charging device within the third time period, turn off the first timer and the second timer, and control the message identification counter to increase a count, so as to complete the power supply communication link.
The method according to claim 2, characterized in that, after adjusting the supply voltage to a first voltage value within the first period of time, the method further comprises:

When the first voltage value is adjusted to the second voltage value within the second period, the first reset message is transmitted to the first protocol layer through the first policy engine, and the first reset message is It is used to indicate that the power supply reset in hard reset is completed;

Transmitting a second reset message to the first physical layer through the first protocol layer, and enabling the communication function of the first physical layer to re-establish the power supply communication link, the second reset message is used for Indicates that the hard reset is complete.
A communication method based on universal serial bus power supply, characterized in that it is applied to a charging device, and the method includes:

sending a hard reset signal to the adapter and suspending the powered communication link with the adapter;

When detecting that the adapter is in a hard reset abnormal state, enabling the communication function of the second physical layer of the charging device after a third period of time;

A data packet is received from the adapter to re-establish the powered communication link.
A communication device powered by a universal serial bus is characterized in that it is applied to an adapter, and the communication device includes:

a receiving unit, configured to receive a hard reset signal from the charging device to perform initialization processing, the initialization processing including suspending the power supply communication link with the charging device;

a voltage adjustment unit, configured to adjust the supply voltage to a first voltage value within a first period of time;

A first enabling unit, configured to determine that the adapter is in a hard reset abnormal state when detecting that the first voltage value has not been adjusted to a second voltage value within a second period of time, and enable the first physical layer of the adapter communication function;

A first communication unit, configured to send a data packet to the charging device to re-establish the power supply communication link.
A communication device powered by a universal serial bus is characterized in that it is applied to a charging device, and the communication device includes:

a sending unit, configured to send a hard reset signal to the adapter, and suspend the power supply communication link with the adapter;

A second enabling unit, configured to enable the communication function of the second physical layer of the charging device after a third period of time when it is detected that the adapter is in a hard reset abnormal state;

The second communication unit is configured to receive a data packet from the adapter to re-establish the power supply communication link.
A computer storage medium, characterized in that, the computer storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the procedure described in claims 1-7. any one of the methods described.