WO2016127402A1

WO2016127402A1 - Method for switching usb driver version and usb device

Info

Publication number: WO2016127402A1
Application number: PCT/CN2015/073040
Authority: WO
Inventors: 金鹏
Original assignee: 华为技术有限公司
Priority date: 2015-02-13
Filing date: 2015-02-13
Publication date: 2016-08-18
Also published as: CN106170778A; CN106170778B

Abstract

A method for switching a USB driver version and a USB device, which relate to the technical field of USBs, and can ensure that a service transmitted between two USB devices is uninterrupted when a USB driver version is switched. The method comprises: a first USB device sends a switching request packet to a second USB device, wherein the switching request packet carries a first USB driver version, the switching request packet is used for requesting the second USB device to switch a second USB driver version into the first USB driver version, and the second USB driver version is a USB driver version currently adopted by the first USB device and the second USB device (S101); the first USB device receives a switching response packet which is sent by the second USB device and corresponds to the switching request packet, wherein the switching response packet is used for indicating whether the second USB device allows switching the second USB driver version into the first USB driver version (S102); and if the switching response packet indicates that the second USB device allows switching the second USB driver version into the first USB driver version, then the first USB device switches the second USB driver version into the first USB driver version (S103).

Description

Method for switching USB driver version and USB device

Technical field

The present invention relates to the field of universal serial bus (English: universal serial bus, abbreviated as USB), and in particular, to a method for switching a USB driver version and a USB device.

Background technique

With the continuous development of USB technology, the application of the USB3.0 standard has become more and more extensive. Typically, USB masters and USB slaves negotiate the USB driver version used for data transfer with the highest supported USB driver version when they first establish a connection. For example, the USB host device supports up to USB version 3.0, and the USB slave device also supports USB version 3.0. After the USB host device and the USB slave device negotiate, the USB3.0 version is used for data transmission. Although the USB 3.0 version can achieve high data transfer rate when data is transmitted, in some frequency bands, data transmitted by USB 3.0 version USB devices (including USB host devices and USB slave devices) will be used. The wireless signal transmitted by the wireless module in the USB device causes interference.

At present, when the USB host device uses USB3.0 version for data transmission, in order to avoid the interference caused by the data to the wireless signal transmitted by the wireless module in the USB host device, the highest USB driver version supported by the USB host device can be manually modified. To reduce the USB driver version used for data transfer between the USB host device and the USB slave device.

However, in the above method, after manually modifying the highest USB driver version supported by the USB host device, the highest USB driver version supported by the USB host device changes, and the change may cause the USB host device to disconnect from the USB slave device. Therefore, the USB host device and the USB slave device need to re-establish a connection and renegotiate the USB driver version for data transmission, thereby interrupting the service transmitted between the USB host device and the USB slave device.

Summary of the invention

The invention provides a method for switching a USB driver version and a USB device, which can ensure the transmission between the USB host device and the USB slave device when switching the USB driver version. Business is not interrupted.

In order to achieve the above object, the present invention adopts the following technical solutions:

In a first aspect, the present invention provides a method for switching a universal serial bus USB driver version, including:

The first USB device sends a switch request message to the second USB device, where the switch request message carries a first USB driver version, and the switch request message is used to request the second USB device to use the second USB driver version. Switching to the first USB driver version, the second USB driver version being a USB driver version currently used by the first USB device and the second USB device;

The first USB device receives a handover response message corresponding to the handover request message sent by the second USB device, where the handover response message is used to indicate whether the second USB device allows the Switching the second USB driver version to the first USB driver version;

If the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, the first USB device switches the second USB driver version to The first USB driver version.

In a first possible implementation manner of the first aspect, the first USB device switches the second USB driver version to the first USB driver version, including:

The first USB device switches a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version;

The first USB device switches a second register corresponding to the second USB driver version to a first register corresponding to the first USB driver version;

The first USB device switches a second data transmission line corresponding to the second USB driver version to a first data transmission line corresponding to the first USB driver version.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner, the first USB device sends a handover request message to the second USB device, including:

When the USB transmission interface in the first USB device is in the first USB device When the wireless module simultaneously transmits data, the first USB device sends the switching request message to the second USB device, where the first USB driver version is a USB driver version lower than the second USB driver version. .

With the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner, the first USB device sends a handover request message to the second USB device, including:

When it is detected that the wireless module in the first USB device does not transmit data, and the USB driver version used by the first USB device to transmit data is not the highest USB driver version supported by the first USB device, the first The USB device sends the switching request message to the second USB device, the first USB driver version being a USB driver version higher than the second USB driver version.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a fourth possible implementation, the first USB device sends a handover request message to the second USB device, including:

The first USB device sends the switching request message to the second USB device according to a triggering operation of the user, where the triggering operation is triggered by the user operating a driving version switching menu or a driving version switching button.

With the fourth possible implementation of the first aspect, in a fifth possible implementation, before the first USB device sends a handover request message to the second USB device, the method further includes:

The first USB device generates the driver version switching menu or the driver version switching button according to a third USB driver version, and the driving version switching menu or the driving version switching button includes at least the first USB device selection Switching the first USB driver version, the third USB driver version is a USB driver version adopted after the first USB device and the second USB device establish a connection for the first time.

With reference to the first aspect or the first possible implementation manner of the first aspect to any one of the fifth possible implementation manners, in a sixth possible implementation manner,

The first USB device is a USB host device, and the second USB device is a USB slave device; or

The first USB device is a USB slave device, and the second USB device is a USB master device.

In a second aspect, the present invention provides a method for switching a universal serial bus USB driver version, including:

The second USB device receives the switch request message sent by the first USB device, where the switch request message carries the first USB driver version, and the switch request message is used to request the second USB device to drive the second USB drive The version is switched to the first USB driver version, and the second USB driver version is a USB driver version currently adopted by the first USB device and the second USB device;

The second USB device sends a handover response message corresponding to the handover request message to the first USB device, where the handover response message is used to indicate whether the second USB device allows the second The USB driver version is switched to the first USB driver version;

If the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, the second USB device switches the second USB driver version to The first USB driver version.

In a first possible implementation manner of the second aspect, the second USB device switches the second USB driver version to the first USB driver version, including:

The second USB device switches a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version;

The second USB device switches a second register corresponding to the second USB driver version to a first register corresponding to the first USB driver version;

The second USB device switches a second data transmission line corresponding to the second USB driver version to a first data transmission line corresponding to the first USB driver version.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner,

In a third aspect, the present invention provides a universal serial bus USB device, including:

a transceiver unit, configured to send a handover request message to the second USB device, and receive a handover response packet corresponding to the handover request packet sent by the second USB device, where the handover request packet carries the first a USB driver version, the switch request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, the second USB driver version is the USB device and the a USB driver version currently used by the second USB device, the switch response message being used to indicate whether the second USB device allows to switch the second USB driver version to the first USB driver version;

a switching unit, configured to: if the switch response message received by the transceiver unit indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, The USB driver version is switched to the first USB driver version.

In a first possible implementation of the third aspect,

The switching unit is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; and to be associated with the second USB driver version Corresponding second register is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to correspond to the first USB driver version The first data transmission line.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner,

The transceiver unit is configured to: when the USB transmission interface in the USB device transmits data simultaneously with the wireless module in the USB device, send the handover request message to the second USB device, where the A USB driver version is a lower USB driver version than the second USB driver version.

In combination with the third aspect or the first possible implementation of the third aspect, in the third Possible implementations,

The transceiver unit is specifically configured to: when detecting that the wireless module in the USB device does not transmit data, and the USB driver version used by the USB device to transmit data is not the highest USB driver version supported by the USB device, The second USB device sends the switching request message, and the first USB driver version is a USB driver version higher than the second USB driver version.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a fourth possible implementation manner,

The transceiver unit is configured to send the switch request message to the second USB device according to a trigger operation of the user, where the trigger operation is triggered by the user operating a driver version switch menu or a driver version switch button.

In conjunction with the fourth possible implementation of the third aspect, in a fifth possible implementation, the USB device further includes a generating unit,

The generating unit is configured to generate the driving version switching menu or the driving version switching button according to the third USB driver version before the sending and receiving unit sends the switching request message to the second USB device, The driving version switching menu or the driving version switching button includes at least the first USB driving version that the switching unit selects to switch, and the third USB driving version is the USB device and the second USB device for the first time. The USB driver version used after negotiation to establish a connection.

With reference to the third aspect or any one of the first possible implementation manner of the third aspect to the fifth possible implementation manner, in a sixth possible implementation manner,

The USB device is a USB host device, and the second USB device is a USB slave device; or

The USB device is a USB slave device, and the second USB device is a USB master device.

In a fourth aspect, the present invention provides a universal serial bus USB device, including:

The transceiver unit is configured to receive a handover request packet sent by the first USB device, and send a handover response packet corresponding to the handover request packet to the first USB device, where the handover request packet carries the first a USB driver version, the switch request message is used to request the USB device to switch the second USB driver version to the first USB driver The second USB driver version is a USB driver version currently used by the first USB device and the USB device, and the switch response message is used to indicate whether the USB device allows the second USB driver The version is switched to the first USB driver version;

a switching unit, configured to: if the switching response message sent by the transceiver unit indicates that the USB device allows to switch the second USB driver version to the first USB driver version, then the second USB driver The version is switched to the first USB driver version.

In a first possible implementation of the fourth aspect,

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner,

The first USB device is a USB host device, and the USB device is a USB slave device; or

The first USB device is a USB slave device, and the USB device is a USB master device.

In a fifth aspect, the present invention provides a universal serial bus USB device, including:

a processor, configured to send, by using a USB transmission interface, a handover request message to the second USB device, and receive, by using the USB transmission interface, a handover response message that is sent by the second USB device and corresponding to the handover request message, The switching request message carries a first USB driver version, and the switching request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, the second USB The driver version is a USB driver version currently used by the USB device and the second USB device, and the switch response message is used to indicate whether the second USB device allows to switch the second USB driver version to the First USB driver version;

The processor is further configured to: if the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, Switching the second USB driver version to the first USB driver version.

In a first possible implementation of the fifth aspect,

The processor is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; and to be associated with the second USB driver version Corresponding second register is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to correspond to the first USB driver version The first data transmission line.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner,

The processor is configured to: when the USB transmission interface in the USB device transmits data simultaneously with the wireless module in the USB device, send the switching request to the second USB device by using the USB transmission interface The message, the first USB driver version is a USB driver version lower than the second USB driver version.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a third possible implementation manner,

The processor is specifically configured to: when detecting that the wireless module in the USB device does not transmit data, and the USB driver version used by the USB device to transmit data is not the highest USB driver version supported by the USB device, The USB transmission interface sends the switching request message to the second USB device, where the first USB driver version is a USB driver version higher than the second USB driver version.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a fourth possible implementation manner,

The processor is specifically configured to send, by using the USB transmission interface, the handover request message to the second USB device according to a trigger operation of the user, where the trigger operation is the user operating a driver version switching menu or driver The version switch button is triggered.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner,

The processor is further configured to send the handover request to the second USB device Before the message, generating the driver version switching menu or the driver version switching button according to the third USB driver version, the driving version switching menu or the driving version switching button at least including the processor selection switching a first USB driver version, wherein the third USB driver version is a USB driver version adopted after the USB device and the second USB device establish a connection for the first time.

With reference to the implementation of any one of the first possible implementation to the fifth possible implementation of the fifth aspect or the fifth aspect, in a sixth possible implementation manner,

In a sixth aspect, the present invention provides a universal serial bus USB device, including:

a processor, configured to receive, by using a USB transmission interface, a handover request message sent by the first USB device, and send, by using the USB transmission interface, a handover response message corresponding to the handover request message to the first USB device, The switching request message carries a first USB driver version, and the switching request message is used to request the USB device to switch the second USB driver version to the first USB driver version, and the second USB driver version The switching response message is used to indicate whether the USB device allows to switch the second USB driver version to the first USB driver for the USB driver version currently used by the first USB device and the USB device. version;

The processor is further configured to: if the switch response message indicates that the USB device allows to switch the second USB driver version to the first USB driver version, switch the second USB driver version to The first USB driver version.

In a first possible implementation of the sixth aspect,

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner,

The present invention provides a method for switching a USB driver version and a USB device. The first USB device sends a switch request message to the second USB device, where the switch request message carries the first USB driver version, and the switch request message is used by the switch request message. And requesting the second USB device to switch the second USB driver version to the first USB driver version, the second USB driver version is the USB driver version currently adopted by the first USB device and the second USB device; and the first USB device receives the second a switching response message corresponding to the switching request message sent by the USB device, the switching response message is used to indicate whether the second USB device allows to switch the second USB driver version to the first USB driver version; and if the switching response is The message indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, and the first USB device switches the second USB driver version to the first USB driver version. With the solution, the first USB device and the second USB device negotiate whether to switch the USB driver version by using the handover request message and the handover response message, so in the process of switching the handover request message and the handover response message, the first USB device The connection between the second USB device and the second USB device is not disconnected, so that the first USB device and the second USB device can directly switch the USB driver version after negotiating to switch the USB driver version, and use the switched USB driver version for data transmission. . Compared with the prior art, after switching the USB driver version, the present invention does not need to re-establish connection and renegotiate the USB driver version for data transmission between the first USB device and the second USB device, thereby ensuring the first USB device and The second USB device ensures that the services transmitted between the two USB devices are not interrupted when the USB driver version is switched.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is some embodiments of the invention.

FIG. 1 is a flowchart of a method for switching a USB driver version according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a handover request packet according to an embodiment of the present invention;

FIG. 2(b) is a schematic structural diagram of a handover response packet according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for switching a USB driver version according to an embodiment of the present invention;

4 is an interaction diagram of a method for switching a USB driver version according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a driving version switching menu according to an embodiment of the present invention;

FIG. 5(b) is a schematic diagram of a driving version switching button according to an embodiment of the present invention;

FIG. 6 is an interaction diagram of a method for switching a USB driver version according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram 1 of a USB device according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram 2 of a USB device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram 3 of a USB device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram 1 of another USB device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram 2 of another USB device according to an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of hardware of a USB device according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram of hardware of another USB device according to an embodiment of the present disclosure;

FIG. 14 is a structural diagram of a USB data transmission system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

At present, a high number can be achieved due to the USB 3.0 version for data transmission. According to the transmission rate (generally up to 640MB / S), the application of the USB3.0 standard is becoming more and more extensive. Usually, if two USB devices that need to transfer data support a certain USB driver version, when the two USB devices establish a connection for the first time, the highest USB driver versions supported by the two USB devices are negotiated as the two USBs. The USB driver version used by the device for data transfer. For example, if both USB devices support the USB 3.0 version, then the two USB devices will use the USB 3.0 version to transfer data after the first connection is established. However, in practical applications, although the USB3.0 version can achieve high data transmission rate, in some scenarios, it is not suitable to use USB3.0 version to transmit data, for example, in the frequency band of 0-5 GHz. The data transmitted by the USB device of USB3.0 will cause great interference to the wireless signal transmitted by the wireless module in the USB device. Therefore, when the wireless module transmits wireless signals in the frequency band of 0-5 GHz, it is not suitable for simultaneous use. USB3.0 version transfers data. In these scenarios, it may be necessary to modify the USB 3.0 version that the USB device is using to other USB driver versions, for example, to USB 2.0. However, the USB driver version can only be modified by manual reconfiguration, but manually modified. After the USB driver version, since the two USB devices are disconnected, the USB devices need to be re-established and renegotiated for data transfer between the two USB devices, which will result in transmission between the two USB devices. Business disruption.

In order to solve the problem of service interruption between two USB devices that cause data transmission when changing the USB driver version, the embodiment of the present invention proposes a method for self-negotiating and automatically switching the USB driver version through two USB devices. It can ensure that the two USB devices ensure that the services transmitted between the two USB devices are not interrupted when switching the USB driver version.

One possible hardware architecture of the method for switching the USB driver version provided by the embodiment of the present invention is: a USB device having a wireless module and a USB transmission interface and supporting the USB 3.0 version. Exemplarily, when the USB device uses USB 3.0 version to transmit data with other USB devices, if the USB device needs to transmit wireless signals through the wireless module at the same time, and the wireless signal transmitted by the wireless module has a large amount of data and delays The requirement is higher, that is, the USB device needs to preferentially ensure the normal transmission of the wireless signal transmitted by the wireless module. The USB device can be used to reduce the USB driver version used by the USB device by using the method of switching the USB driver version provided by the embodiment of the present invention. For example, the USB 3.0 version currently used by the USB device can be switched to the USB 2.0 version. It can ensure the normal transmission of data transmitted through the USB transmission interface, and can ensure the normal transmission of wireless signals transmitted through the wireless module.

Further, after the USB device is configured to transmit the wireless signal through the wireless module, in order to ensure the transmission rate of the data transmitted by the USB device through the USB transmission interface, the method for switching the USB driver version provided by the embodiment of the present invention may also be the USB device. The adopted USB driver version is increased, for example, the USB2.0 version currently adopted by the USB device can be switched to the USB3.0 version.

The method for switching the USB driver version and the USB device provided by the embodiment of the present invention are described in detail below with reference to the accompanying drawings.

Embodiment 1

The embodiment of the invention provides a method for switching a USB driver version. As shown in FIG. 1 , the method may include:

S101. The first USB device sends a switch request message to the second USB device, where the switch request message carries a first USB driver version, where the switch request message is used to request the second USB device to switch the second USB driver version to The first USB driver version, the second USB driver version is the USB driver version currently used by the first USB device and the second USB device.

S102. The first USB device receives, by the second USB device, a handover response packet corresponding to the handover request packet, where the handover response packet is used to indicate whether the second USB device allows to switch the second USB driver version to the first USB driver version.

S103. If the switch response message indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, the first USB device switches the second USB driver version to the first USB driver version.

The first USB device may be a USB host device, and the second USB device may be a USB slave device; or the first USB device may be a USB slave device, and the second USB device may be a USB host device. That is, the USB host device can initiate the switching of the USB driver version, and the USB slave device can also initiate the switching of the USB driver version. There are no restrictions.

Further, the USB host device provided by the embodiment of the present invention may be a device such as a computer or a television, and the USB slave device may be a device such as a mobile phone, a keyboard, a mouse, or a USB flash drive.

For example, when the first USB device and the second USB device are in the process of data transmission using the USB3.0 version, if the first USB device needs to pass through the wireless module at the same time (for example, the wireless fidelity module (English: WIreless-Fidelity, The abbreviation: WIFI) transmits a wireless signal, and the data transmitted by the USB device of the USB 3.0 version may interfere with the wireless signal transmitted by the wireless module in the USB device. Therefore, the first USB device may be provided by using the embodiment of the present invention. The method of switching the USB driver version switches the USB driver version used by the first USB device and the second USB device for data transmission. For example, the first USB device can reduce the USB driver version from the USB 3.0 version to the USB 2.0 version, so that While the data transmitted by the first USB device through the USB transmission interface is normally transmitted, the wireless signal transmitted by the first USB device through the wireless module is normally transmitted.

In the embodiment of the present invention, when determining that the first USB device needs to switch the second USB driver version of the first USB device and the second USB device for data transmission, the first USB device may initiate a USB driver version switching, the specific A USB device can send a switch request message to the second USB device, where the switch request message carries a first USB driver version, and the switch request message can be used to request the second USB device to switch the second USB driver version to the first A USB driver version. After the second USB device receives the switch request message, the second USB device can send a switch response message corresponding to the switch request message to the first USB device according to the USB drive version supported by the second USB device, and the switch response message is available. Instructing the second USB device whether to allow the second USB driver version to be switched to the first USB driver version, wherein the description of whether the specific second USB device supports the first USB driver version will be enumerated in detail in the following embodiments.

When the switch response message received by the first USB device indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, the first USB device may perform current data between the first USB device and the second USB device. The second USB driver version used for the transfer is switched to the first USB driver version.

Optionally, the handover request packet and the handover response packet provided by the embodiment of the present invention may be implemented by extending a field in a packet defined in the USB standard, for example, a control transfer (English: control transfer) message; The format of the packet defined by the USB standard redefines a new packet implementation, and the implementation manner of the specific handover request packet and the handover response packet is not limited in the present invention.

In the USB standard protocol, a USB transaction is usually composed of three messages (also called packets or periods), which are marked packets (English: token packet) and data packets (English: data packet) ) and handshake packet. In the embodiment of the present invention, the switch request message and the handover response message are implemented by extending a field in the tagged message and setting the identifier of the handover request message or the handover response message in the field. Certainly, the embodiment of the present invention may also re-define a new packet, and set the identifier of the handover request packet or the handover response packet in the new packet to implement the handover request packet and the handover response packet.

For example, the extension of a field in the tagged message, and the setting of the handover request message or the handover response message in the field to implement the handover request message and the handover response message, as an example, provided by the embodiment of the present invention The structure diagram of the handover request message and the handover response message is shown in FIG. 2. (a) in FIG. 2 is a schematic structural diagram of a handover request message; (b) in FIG. 2 is a schematic structural diagram of a handover response message. Specifically, whether the marked message is a handover request message or a handover response message can be indicated by setting different values in the extension field.

In particular, the USB driver versions mentioned in the embodiments of the present invention all refer to the hardware version of the USB. The hardware version of the USB can include a USB hardware driver, a USB register, and a USB transmission line.

In the method for switching the USB driver version provided by the embodiment of the present invention, after the first USB device sends the switching request message to the second USB device, the first USB device may temporarily stop sending data to the second USB device, but the first USB device The data sent by the second USB device can still be received, and the data that has been received is processed; after the second USB device receives the switch request message sent by the first USB device, the second USB device can temporarily stop the first USB device. The device sends data and continues the data that has been received before. The processing continues, and the second USB device responds to the handover request message, that is, the second USB device sends a handover response message to the first USB device. After the first USB device and the second USB device negotiate and switch the USB driver version, the data can be continuously transmitted through the respective USB transmission interface using the switched USB driver version. During the process of negotiating whether the first USB device and the second USB device can switch the USB driver version, the switch request message and the switch response message exchanged by the first USB device and the second USB device are transmitted through the USB control channel. Therefore, in the process, the first USB device and the second USB device are not disconnected, so that the first USB device and the second USB device can directly switch the USB driver version after negotiating to switch the USB driver version, and After switching the USB driver version, you can continue to transfer data without re-establishing the connection and without renegotiating the USB driver version for data transmission, thus ensuring that the first USB device and the second USB device guarantee two USBs when switching the USB driver version. The services transmitted between devices are not interrupted.

The method for switching the USB driver version provided by the embodiment of the present invention, because the first USB device and the second USB device negotiate whether to switch the USB driver version through the switch request message and the switch response message, so the switch request message and the switch response report are During the file transmission process, the first USB device and the second USB device are not disconnected, so that the first USB device and the second USB device can switch the USB driver version after negotiating through the switch request message and the switch response message. It can directly switch the USB driver version and use the switched USB driver version for data transmission. Compared with the prior art, the method for switching the USB driver version provided by the embodiment of the present invention does not disconnect the connection between the first USB device and the second USB device during the process of switching the USB driver version, so the USB is switched. After the driver version, there is no need to re-establish the connection and renegotiate the USB driver version for data transmission between the first USB device and the second USB device, thereby ensuring that the first USB device and the second USB device guarantee two when switching the USB driver version. The services transmitted between the USB devices are not interrupted.

An embodiment of the present invention provides a method for switching a USB driver version. As shown in FIG. 3, the method may include:

S201. The second USB device receives the handover request packet sent by the first USB device. The switch request message carries a first USB driver version, and the switch request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, and the second USB driver version is the first USB device and The USB driver version currently used by the second USB device.

S202. The second USB device sends a handover response packet corresponding to the handover request packet to the first USB device, where the handover response packet is used to indicate whether the second USB device allows to switch the second USB driver version to the first USB. Driver version.

S203. If the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, the second USB device switches the second USB driver version to the first USB driver version.

After the second USB device receives the switch request message sent by the first USB device, the second USB device can determine whether the second USB device supports the first USB driver version according to the USB driver version supported by the second USB device, if the second USB device supports the second USB device. a USB driver version, the second USB device may allow the second USB driver version to be switched to the first USB driver version; conversely, if the second USB device does not support the first USB driver version, the second USB device does not allow The second USB driver version is switched to the first USB driver version.

For example, if the first USB device and the second USB device are currently performing data transmission, the USB driver version is USB3.0 version, and the USB3.0 version is negotiated after the first USB device and the second USB device establish a connection for the first time. The USB driver version, the USB driver version that the first USB device can support includes USB3.0 version, USB2.0 version and USB1.1 version; the second USB device can support the USB driver version also includes USB3.0 version, USB2 .0 version and USB 1.1 version. When the first USB driver version carried in the handover request message sent by the first USB device is the USB2.0 version, since the second USB device supports the USB2.0 version, the second USB device can allow the USB 3.0 version to be switched. For the USB2.0 version.

If the first USB device and the second USB device are currently performing data transmission, the USB driver version is USB2.0 version, and the USB2.0 version is the negotiated USB driver version when the first USB device and the second USB device establish a connection for the first time. , assuming that the USB driver version that the first USB device can support includes USB3.0 version, USB2.0 version and USB1.1. Version; the USB driver version that the second USB device can support includes USB2.0 version and USB1.1 version. When the first USB driver version carried in the handover request message sent by the first USB device is the USB3.0 version, since the second USB device does not support the USB3.0 version, the second USB device does not allow the USB2.0 version. Switch to USB3.0 version.

If the first USB device and the second USB device are currently performing data transmission, the USB driver version is USB2.0 version, and the USB2.0 version is the first USB device and the second USB device will be USB3.0 version during data transmission. After switching the USB driver version, the USB driver version that the first USB device can support includes USB3.0 version, USB2.0 version and USB1.1 version; the second USB device can support the USB driver version also includes USB3.0 version. , USB2.0 version and USB1.1 version. When the first USB driver version carried in the switch request message sent by the first USB device is the USB3.0 version, since the second USB device supports the USB3.0 version, the second USB device can allow the USB2.0 version to be switched. For the USB3.0 version.

Specifically, the USB driver version that the first USB device can support is related to the actual hardware support capability of the first USB device; the USB driver version that the second USB device can support is related to the actual hardware support capability of the second USB device, and the present invention does not Specific restrictions.

Those skilled in the art can understand that if the first USB device or the second USB device supports a certain USB driver version, the first USB device or the second USB device can also support all USB driver versions lower than the USB driver version. For example, if the first USB device or the second USB device supports the USB 3.0 version, the first USB device or the second USB device can also support all USB driver versions lower than the USB 3.0 version, such as the USB 2.0 version and the USB1. .1 version.

Further, if the second USB device allows the second USB driver version to be switched to the first USB driver version, the second USB device may use the second data transmission currently after transmitting the handover response message to the first USB device. The USB driver version is switched to the first USB driver version.

It should be noted that, for the description of the handover request packet and the handover response packet, refer to the descriptions of the handover request packet and the handover response packet in the foregoing embodiment shown in FIG. 1 and FIG. Narration.

Embodiment 2

An embodiment of the present invention provides a method for switching a USB driver version. As shown in FIG. 4, the method may include:

S301: The first USB device receives the first negotiation message sent by the second USB device, where the first negotiation message carries the highest USB driver version supported by the second USB device.

The first negotiation message is used by the second USB device to negotiate with the first USB device for the USB driver version for data transmission.

Further, the first negotiation packet may further carry information such as the type of the second USB device. The type of the second USB device can be a mouse, a USB flash drive, a keyboard, or the like. The information of the type of the second USB device may be such that after the first USB device receives the first negotiation message sent by the second USB device, it determines which device the second USB device is, so that the first USB device can negotiate data. After the USB driver version is transferred, the hardware drivers and control commands corresponding to the device are loaded. For example, if the type of the second USB device is a mouse, the first USB device can load the hardware driver and control commands corresponding to the mouse after negotiating the USB driver version for data transmission.

S302. The first USB device is supported by the highest USB driver version supported by the second USB device. This and the highest USB driver version supported by the first USB device determine the third USB driver version for data transfer.

The third USB driver version for performing data transmission is the highest USB driver version supported by the first USB device and the second USB device. For example, if the highest USB driver version supported by the first USB device and the second USB device is the USB3.0 version, the third USB driver version for data transmission is the USB3.0 version; if the first USB device supports the highest The USB driver version is USB3.0 version, and the second USB device supports the highest USB driver version as USB2.0 version. The third USB driver version for data transmission is USB2.0 version.

S303. The first USB device sends a second negotiation message to the second USB device, where the second negotiation message carries the third USB driver version.

The second negotiation message is used to indicate to the second USB device that the USB driver version used for data transmission by the first USB device and the second USB device is the third USB driver version.

In the above S301-S303, the first USB device is a USB host device, and the second USB device is a USB slave device.

According to the provisions of the USB standard, when the first USB device and the second USB device described in the above S301-S303 negotiate a USB driver version for data transmission, the highest supported by both the first USB device and the second USB device can be negotiated. USB driver version, this is because the higher the USB driver version, the higher the data transfer rate of the USB transfer interface, so as to ensure that the data transmitted through the USB transfer interface can achieve a relatively large transfer rate.

S304. The first USB device and the second USB device use the third USB driver version for data transmission.

S305. The first USB device sends a handover request message to the second USB device, where the handover request message carries the first USB driver version.

The switching request message is used to request the second USB device to drive the second USB The version is switched to the first USB driver version, and the second USB driver version is the USB driver version currently used by the first USB device and the second USB device.

In the embodiment of the present invention, the second USB driver version may be a USB driver version negotiated when the first USB device and the second USB device are first established, that is, the second USB driver version may be the third USB driver determined in the above S302. The second USB driver version may also be a USB driver version after the third USB driver version is negotiated after the first USB device and the second USB device are first established in the data transmission process. The method for switching the USB driver version provided by the embodiment of the present invention may be applied to the third USB driver version negotiated when the first USB device and the second USB device are first established. (The third USB driver version is the second at this time. USB driver version) In the scenario that needs to be switched; it can also be applied to the first USB device to switch the first USB driver version after switching (the first USB driver version is the second USB driver version) to the first connection. In the scenario of the third USB driver version after negotiation (the third USB driver version is the first USB driver version at this time); it can also be applied to the first USB driver version that needs to be switched after the first USB device (at this time) In the scenario where the first USB driver version is the second USB driver version and then switched to the other USB driver version (the other USB driver version is the first USB driver version), the specific application scenario is not limited in the present invention.

It should be noted that the foregoing descriptions of the scenarios for switching USB driver versions are merely exemplary. The present invention includes, but is not limited to, the scenarios described above for switching USB driver versions, that is, any switch that needs to be switched in the USB driver version. In the scenario, the USB driver version can be switched by using the method of switching the USB driver version provided by the embodiment of the present invention.

In order to more clearly understand the method for switching the USB driver version provided by the embodiment of the present invention, the second USB driver version used for data transmission by the first USB device and the second USB device in the embodiment is the above S302. A USB device and a second USB device establish a connection for the first time after the third USB driver version negotiated, and the switched USB driver version is the first USB driver version as an example for exemplary description.

Specifically, the scenario in which the first USB device sends the handover request message to the second USB device may be one of the following:

(1) when the USB transmission interface in the first USB device is in the first USB device When the wireless module simultaneously transmits data, the first USB device sends a switching request message to the second USB device, and the first USB driver version is a USB driver version lower than the second USB driver version.

Specifically, when the USB device simultaneously uses the USB transmission interface and the wireless module to transmit data, the data transmitted by the USB transmission interface may cause interference to the wireless signal transmitted by the wireless module, causing the wireless module to disconnect, thereby causing the wireless module to fail to transmit wirelessly. signal. The wireless module can be a WIFI module or a data card (the data card can be a subscriber identity module (SIM) card).

For example, the second USB driver version is the USB3.0 version, in order to eliminate the data transmitted by the first USB device using the USB3.0 version through the USB transmission interface of the first USB device to the wireless module in the first USB device. The interference caused by the wireless signal ensures that the wireless module can transmit the wireless signal normally. The USB driver version can be switched from the USB3.0 version to the USB2.0 version or the lower USB driver by using the method of switching the USB driver version provided by the embodiment of the present invention. version.

(2) when it is detected that the wireless module in the first USB device does not transmit data, and the USB driver version used by the first USB device to transmit data is not the highest USB driver version supported by the first USB device, the first USB device is in the second The USB device sends a handover request message, and the first USB driver version is a USB driver version higher than the second USB driver version.

For example, in the above (1), after the USB driver version is switched from the USB 3.0 version to the USB 2.0 version, if the wireless signal transmission of the wireless module in the first USB device is completed, and the first USB device transmits data, The USB driver version is not the highest USB driver version supported by the first USB device (the higher the USB driver version, the higher the transmission rate of the data transmitted by the USB transmission interface), in order to improve the transmission rate of the data transmitted by the USB transmission interface, this can be used. The method for switching the USB driver version provided by the embodiment of the invention switches the USB driver version from the USB2.0 version to the USB3.0 version.

(3) The first USB device sends a handover request message to the second USB device according to the trigger operation of the user.

The triggering operation is triggered by a user operating a driver version switching menu or a driving version switching button. Specifically, when the user determines that the currently used second USB driver version needs to be switched, the user may trigger the first USB device to send a handover request message to the second USB device by operating the driver version switching menu or the driving version switching button. Exemplarily, the user can trigger the switching process of the USB driver version by selecting any one of the driver version switching menu or the driver version switching button that is different from the second USB driver version.

Further, after the first USB device and the second USB device negotiate the third USB driver version for data transmission when the connection is first established (the third USB driver version may be the second USB driver version described above), the first The USB device may generate a driver version switching menu or a driver version switching button corresponding to the third USB driver version according to the third USB driver version. The driver version switching menu or the driver version switching button includes at least a first USB driver version of the first USB device selection switching. That is, the first USB driver version may be included in the driver version switch menu or the driver version switch button. The first USB driver version and other USB driver versions that the first USB device can support may also be included, which is not specifically limited by the present invention.

When the driver version switching menu or the driver version switching button includes the first USB driver version, the user can trigger the switching process of the USB driver version by selecting the first USB driver version; when the driver version switching menu or the driver version switching button includes the first USB When the driver version and other USB driver versions that the first USB device can support, the user can trigger the USB driver version switching process by selecting any one of the USB driver versions.

Preferably, the driver version switch menu or the driver version switch button includes all USB driver versions that the first USB can support, that is, all USB driver versions that are lower than the third USB driver version. In this way, since the user can select more USB driver versions to switch, the flexibility of the user to trigger the USB driver version switching process can be increased.

For example, when the third USB driver version is the USB3.0 version, the driver version switching menu or the driver version switching button generated by the first USB device includes the USB3.0 version, the USB2.0 version, and the USB1.1 version. That is, the first USB device and the second USB device After the third USB driver version for data transmission is negotiated when the connection is first established, the driver version switching menu or the driver version switching button generated by the first USB device includes a third USB driver version for data transmission after negotiation and The third USB driver version is low for all USB driver versions. These USB driver versions are available for the first USB device to switch when it is necessary to switch the USB driver version.

Exemplarily, as shown in FIG. 5, when the third USB driver version is the USB3.0 version, the driver version switching menu generated by the first USB device may be as shown in (a) of FIG. 5; the first USB device generates The driver version switching button can be as shown in (b) of FIG.

S306. The second USB device sends a handover response packet corresponding to the handover request message to the first USB device.

The switching response message is used to indicate whether the second USB device allows to switch the second USB driver version to the first USB driver version. In this embodiment, the second USB driver version is the third USB driver version determined in the above S302.

S307. If the switch response message indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, the second USB device switches the second USB driver version to the first USB driver version.

S308. If the switch response message indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, the first USB device switches the second USB driver version to the first USB driver version.

Specifically, whether the second USB device is allowed to switch the second USB driver version For the description of the first USB driver version, refer to the related description in the embodiment shown in FIG. 3 above, and details are not described herein again.

S309. The first USB device sends a handover confirmation message corresponding to the handover response message to the second USB device.

The switch confirmation message is used to confirm that the first USB device switches the second USB driver version to the first USB driver version.

S310. The first USB device and the second USB device use the first USB driver version for data transmission.

After the first USB device sends the handover confirmation message to the second USB device, the first USB device may start to send data to the second USB device by using the first USB driver version through the USB transmission interface of the first USB device; correspondingly, the second The USB device also begins to receive data transmitted by the first USB device through the USB transmission interface of the second USB device using the first USB driver version. After the second USB device receives the switch confirmation message sent by the first USB device, the second USB device may start to send data to the first USB device by using the first USB driver version through the USB transmission interface of the second USB device; The first USB device also begins to receive data transmitted by the second USB device through the USB transmission interface of the first USB device using the first USB driver version.

It should be noted that, in the above S304-S310, the first USB device may be a USB host device, and the second USB device may be a USB slave device; or the first USB device may be a USB slave device, and the second USB device may be a USB host device. device.

Further, in the method for switching the USB driver version provided by the embodiment of the present invention, the USB host device may initiate a USB driver version switching process, and the USB slave device may initiate a USB driver version switching process, or the user may trigger the USB host. The device initiates the switching process of the USB driver version, and the user can trigger the USB slave device to initiate the USB driver version switching process. The specific design can be designed according to the actual use requirements, and the present invention is not limited.

As shown in FIG. 6, S307 and S308 shown in FIG. 4 above may specifically include:

S307a. If the switch response message indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, the second USB device switches the second USB driver corresponding to the second USB driver version to the first The USB driver version corresponds to the first USB driver.

S307b. The second USB device switches the second register corresponding to the second USB driver version to the first register corresponding to the first USB driver version.

S307c. The second USB device switches the second data transmission line corresponding to the second USB driver version to the first data transmission line corresponding to the first USB driver version.

Exemplarily, assume that the second USB driver is a USB 3.0 driver, the first USB driver is a USB 2.0 driver, the second register is a USB 3.0 register, the first register is a USB 2.0 register, and the second data transmission line is a USB3. .0 transmission line, the first data transmission line is a USB2.0 transmission line; when the second USB device switches the second USB driver version to the first USB driver version, the second USB device can switch the USB3.0 driver to the USB2 The .0 driver switches the USB3.0 register to the USB2.0 register and switches the USB3.0 transmission line to the USB2.0 transmission line, thereby completing the process of switching the second USB driver version to the first USB driver version.

S308a. If the switch response message indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version, the first USB device switches the second USB driver corresponding to the second USB driver version to the first The USB driver version corresponds to the first USB driver.

S308b. The first USB device switches the second register corresponding to the second USB driver version to the first register corresponding to the first USB driver version.

S308c. The first USB device switches the second data transmission line corresponding to the second USB driver version to the first data transmission line corresponding to the first USB driver version.

It should be noted that the method for the first USB device to switch the USB driver version is similar to the method for the second USB device to switch the USB driver version. For the method for the first USB device to switch the USB driver version, refer to the foregoing S307a-S307c for the second method. A description of the method for the USB device to switch the USB driver version will not be described here.

Those skilled in the art can understand that the switching process of the above USB driver version is only The USB transmission interface of the USB device is logically switched, and the switching process of the USB driver version can be implemented by a software program. Specifically, the first USB device and the second USB device can negotiate whether the USB driver version can be switched by using the switch request message and the switch response message, and the USB driver version can be switched when the first USB device and the second USB device negotiate. Thereafter, the first USB device and the second USB device can switch the USB driver version by switching the USB driver, the USB register, and the USB transmission line. For example, if the first USB device and the second USB device are switched from the USB 3.0 version to the USB 2.0 version, the first USB device and the second USB device can pass the driver, the register, and the transmission line corresponding to the USB 3.0 version. Switch to the driver, register and transmission line corresponding to the USB2.0 version to logically switch the USB transmission interface from USB3.0 to USB2.0.

The first USB device and the second USB device can implement switching of the USB driver version by modifying configuration information corresponding to the USB driver version (for example, the above-mentioned driver, various parameter values in the register, and transmission rate of the transmission line).

Exemplarily, assuming that the second USB device modifies the configuration information corresponding to the USB 3.0 version to the configuration information corresponding to the USB 2.0 version, the second USB device can load the USB 3.0 driver to replace the USB 2.0 driver, and The values of the parameters of USB3.0 in the register are all changed to the values of the parameters of USB2.0, and the transmission rate of the transmission line of USB3.0 is modified to the transmission rate of the transmission line of USB2.0.

It should be noted that the method for the first USB device and the second USB device to switch the USB driver version may include, but is not limited to, the method listed above, that is, the USB can be switched by the method for switching the USB driver version provided by the embodiment of the present invention. For the driver version, the USB driver version can be switched by other possible switching methods in the specific implementation, and the present invention will not be described in detail.

In particular, the USB driver versions mentioned in the embodiments of the present invention all refer to the hardware version of the USB. The hardware version of the USB may include a USB hardware driver (such as the first USB driver and the second USB driver described above), a USB register (such as the first register and the second register described above), and a USB data transmission line (such as the above). The first data transmission line and the second data transmission line) and the like.

In the method for switching the USB driver version provided by the embodiment of the present invention, the first USB device After the switch sends the switch request message to the second USB device, the first USB device can temporarily stop sending data to the second USB device, but the first USB device can still receive the data sent by the second USB device and the received data. After the second USB device receives the switch request message sent by the first USB device, the second USB device can temporarily stop sending data to the first USB device, and continue processing the data that has been received before, and The second USB device responds to the handover request message, that is, the second USB device sends a handover response message to the first USB device. During the process of negotiating whether the first USB device and the second USB device can switch the USB driver version, the switch request message and the switch response message exchanged by the first USB device and the second USB device are transmitted through the USB control channel. Therefore, in the process, the first USB device and the second USB device are not disconnected, so that the first USB device and the second USB device can directly switch the USB driver version after negotiating to switch the USB driver version, and After switching the USB driver version, you can continue to transfer data without re-establishing the connection and without renegotiating the USB driver version for data transmission, thus ensuring that the first USB device and the second USB device guarantee two USBs when switching the USB driver version. The services transmitted between devices are not interrupted.

Embodiment 3

As shown in FIG. 7, an embodiment of the present invention provides a USB device, where the USB device may include:

The transceiver unit 10 is configured to send a handover request message to the second USB device, and receive a handover response packet corresponding to the handover request packet sent by the second USB device, where the handover request packet carries the a USB driver version, the switch request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, and the second USB driver version is the USB device and the The USB driver version currently used by the second USB device, the switch response message is used to indicate whether the second USB device allows to switch the second USB driver version to the first USB driver version; For the second USB device if the switch response message received by the transceiver unit 10 indicates that the second USB device allows the second USB driver version to be switched to the first USB driver version. The driver version is switched to the first USB driver version.

Optionally, the switching unit 11 is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; a second register corresponding to the second USB driver version is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to be the first The first data transmission line corresponding to the USB driver version.

Optionally, the transceiver unit 10 is configured to: when the USB transmission interface in the USB device transmits data simultaneously with the wireless module in the USB device, send the handover request report to the second USB device. The first USB driver version is a USB driver version lower than the second USB driver version.

Optionally, the transceiver unit 10 is configured to detect that the wireless module in the USB device does not transmit data, and the USB driver version used by the USB device to transmit data is not the highest USB driver version supported by the USB device. And transmitting, by the second USB device, the switching request message, where the first USB driver version is a USB driver version higher than the second USB driver version.

Optionally, the transceiver unit 10 is configured to send the switch request message to the second USB device according to a triggering operation of the user, where the trigger operation is the user operating a driver version switch menu or a driver version. Toggle button triggered.

Optionally, on the basis of FIG. 7, as shown in FIG. 8, the USB device further includes a generating unit 12,

The generating unit 12 is configured to generate the driver version switching menu or the driver version switching according to the third USB driver version before the transceiver unit 10 sends the switching request message to the second USB device. a button, the driver version switching menu or the driver version switching button at least comprising the first USB driver version selected by the switching unit 11 to switch, the third USB driver version being the USB device and the second The USB driver version that is used after the USB device establishes the connection for the first time.

Optionally, the transceiver unit 10 is further configured to: after the switching unit 11 switches the second USB driver version to the first USB driver version, send the switch to the second USB device And responding to the handover confirmation message corresponding to the message, the handover confirmation message is used to confirm that the USB device switches the second USB driver version to the first USB driver version.

Optionally, on the basis of FIG. 8, as shown in FIG. 9, the USB device further includes a transmission unit 13,

The transmitting unit 13 is configured to: after the sending and receiving unit 10 sends the switching confirmation message to the second USB device, adopt the first USB driver version that is switched by the switching unit 11 and the first Two USB devices for data transmission.

It should be noted that the USB device in this embodiment may be the first USB device in the foregoing Embodiment 1 and Embodiment 2.

Optionally, the USB device provided by the embodiment of the present invention is a USB host device, and the second USB device is a USB slave device; or the USB device is a USB slave device, and the second USB device is a USB master device. .

The USB host device provided by the embodiment of the present invention may be a device such as a computer or a television, and the USB slave device may be a device such as a mobile phone, a keyboard, a mouse, or a USB flash drive.

The embodiment of the invention provides a USB device, because the USB device and the second USB The device negotiates whether to switch the USB driver version through the switch request message and the switch response message. Therefore, during the process of switching the request message and the switch response message, the USB device and the second USB device are not disconnected. After the USB device version can be switched through the switch request message and the switch response message negotiation, the USB device and the second USB device can directly switch the USB driver version and use the switched USB driver version for data transmission. Compared with the prior art, since the embodiment of the present invention does not disconnect the USB device and the second USB device during the process of switching the USB driver version, after switching the USB driver version, the USB device and the The USB driver version for data transmission between the two USB devices does not need to be re-established and renegotiated, so that the USB device and the second USB device can ensure that the services transmitted between the two USB devices are not interrupted when the USB driver version is switched.

As shown in FIG. 10, an embodiment of the present invention provides another USB device, where the USB device may include:

The transceiver unit 20 is configured to receive a handover request packet sent by the first USB device, and send a handover response packet corresponding to the handover request packet to the first USB device, where the handover request packet carries the a USB driver version, the switch request message is used to request the USB device to switch a second USB driver version to the first USB driver version, and the second USB driver version is the first USB device and The USB driver version currently used by the USB device, the switch response message is used to indicate whether the USB device allows to switch the second USB driver version to the first USB driver version; and the switching unit 21 is configured to: The switching response message sent by the transceiver unit 20 indicates that the USB device allows to switch the second USB driver version to the first USB driver version, and then switches the second USB driver version to the The first USB driver version.

Optionally, the switching unit 21 is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; a second register corresponding to the second USB driver version is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to be the first USB driver version Corresponding first data transmission line.

Optionally, the transceiver unit 20 is further configured to: if the switch response message indicates that the USB device allows to switch the second USB driver version to the first USB driver version, Receiving, by the USB device, a handover response message corresponding to the handover request message, receiving a handover confirmation message sent by the first USB device, where the handover confirmation message is used to confirm that the first USB device is to be The second USB driver version is switched to the first USB driver version.

Optionally, on the basis of FIG. 10, as shown in FIG. 11, the USB device may further include a transmission unit 22,

The transmitting unit 22 is configured to: after the transceiver unit 20 receives the handover confirmation message sent by the first USB device, use the first USB driver version that is switched by the switching unit 21 and the The first USB device performs data transmission.

Optionally, the first USB device provided by the embodiment of the present invention is a USB host device, and the USB device is a USB slave device; or the first USB device is a USB slave device, and the USB device is a USB master device. .

It should be noted that the USB device in this embodiment may be the second USB device in the first embodiment and the second embodiment.

The embodiment of the present invention provides another USB device. Since the USB device and the first USB device negotiate whether to switch the USB driver version by using the handover request message and the handover response message, the handover request message and the handover response message transmission process are performed. The USB device and the first USB device are not disconnected, so that the USB device and the first USB device can directly switch the USB after switching the USB driver version through the negotiation of the switch request message and the switch response message. Drive version and use the switched USB driver version for data transfer. Compared with the prior art, since the USB connection between the USB device and the first USB device is not disconnected during the process of switching the USB driver version, the USB device and the USB device are switched after the USB driver version is switched. There is no need to re-establish connection and renegotiate the USB driver version for data transfer between the first USB devices, thus It can be ensured that the USB device and the first USB device ensure that the services transmitted between the two USB devices are not interrupted when the USB driver version is switched.

Embodiment 4

As shown in FIG. 12, an embodiment of the present invention provides a USB device, which may include a processor 30, a memory 31, a USB transmission interface 32, and a transmission bus 33, wherein the processor 30, the memory 31, and the USB are provided. The transmission interfaces 32 are connected by the transmission bus 33 and complete communication with each other.

The processor 30 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. .

The USB transmission interface 32 may be an interface for data transmission between the USB device and other USB devices.

The memory 31 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory 31 may also include a non-volatile memory (English: Non-volatile memory, such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English) : solid-state drive, abbreviated: SSD); the memory 31 may also include a combination of the above types of memories.

When the USB device is in operation, the processor 30 may perform the method flow described in FIG. 1, FIG. 4 or FIG.

The processor 30 is configured to send, by using the USB transmission interface 32, a handover request message to the second USB device, and receive, by using the USB transmission interface 32, the second USB device corresponding to the handover request message. And switching a response message, where the switch request message carries a first USB driver version, where the switch request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, The second USB driver version is a USB driver version currently used by the USB device and the second USB device, and the switch response message is used to indicate that the second USB device is Whether the second USB driver version is allowed to be switched to the first USB driver version; the processor 30 is further configured to: if the switch response message indicates that the second USB device allows the second USB The driver version is switched to the first USB driver version, and the second USB driver version is switched to the first USB driver version; the memory 31 is configured to store the code of the handover request message, the Switching a code of the response message, the first USB driver version, the second USB driver version, and a software program controlling the processor 30 to complete the process, the processor 30 executing the software program and calling The above code and USB driver version complete the above process. The code may include a code for switching the request message and a code for switching the response message; the USB driver version may include the first USB driver version and the second USB driver version.

Optionally, the processor 30 is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; a second register corresponding to the second USB driver version is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to be the first The first data transmission line corresponding to the USB driver version.

Optionally, the processor 30 is configured to: when the USB transmission interface in the USB device transmits data simultaneously with the wireless module in the USB device, use the USB transmission interface to the second USB device Sending the switching request message, the first USB driver version is a USB driver version lower than the second USB driver version.

Optionally, the processor 30 is configured to: when detecting that the wireless module in the USB device does not transmit data, and the USB device that uses the USB driver to transmit data is not the highest USB driver supported by the USB device. In the version, the switching request message is sent to the second USB device by using the USB transmission interface, where the first USB driver version is a USB driver version higher than the second USB driver version.

Optionally, the processor 30 is configured to send, by using the USB transmission interface 32, the handover request packet to the second USB device according to a trigger operation of the user, where the trigger operation is the user operation. The driver version switch menu or the driver version switch button is triggered.

Optionally, the processor 30 is further configured to generate the driver version switch menu or the driver version switch according to the third USB driver version before sending the switch request message to the second USB device. a button, the driver version switching menu or the driver version switching button at least comprising the first USB driver version selected by the processor 30 to switch, the third USB driver version being the USB device and the second The USB driver version that is used after the USB device establishes the connection for the first time.

Optionally, the processor 30 is further configured to send, by using the USB transmission interface 32, the second USB device after switching the second USB driver version to the first USB driver version. And a handover confirmation message corresponding to the handover response message, where the handover confirmation message is used to confirm that the USB device switches the second USB driver version to the first USB driver version.

Optionally, the processor 30 is further configured to adopt, by using the USB transmission interface 32, the first USB driver version and the second after sending the handover confirmation message to the second USB device. USB devices for data transfer.

The embodiment of the present invention provides a USB device. The USB device and the second USB device negotiate whether to switch the USB driver version by using the handover request message and the handover response message. Therefore, during the transmission of the handover request message and the handover response message, The USB device and the second USB device are not disconnected, so that the USB device and the second USB device can directly switch the USB driver after switching the USB driver version through the switch request message and the switch response message negotiation. Version, and use the switched USB driver version for data transfer. Compared with the prior art, the embodiment of the present invention does not disconnect the USB device and the second USB device during the process of switching the USB driver version. Therefore, after switching the USB driver version, there is no need to re-establish connection and renegotiate the USB driver version for data transmission between the USB device and the second USB device, thereby ensuring that the USB device and the second USB device are switched when the USB driver version is switched. Ensure that the services transmitted between the two USB devices are not interrupted.

As shown in FIG. 13, the embodiment of the present invention provides another USB device, which may include a processor 40, a memory 41, a USB transmission interface 42, and a transmission bus 43, wherein the processor 40, the memory 41, and the USB The transmission interfaces 42 are connected by the transmission bus 43 and complete communication with each other.

The processor 40 can be a CPU, or an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

The USB transmission interface 42 may be an interface for data transmission between the USB device and other USB devices.

The memory 41 may include a volatile memory such as a RAM; the memory 41 may also include a non-volatile memory such as a ROM, a flash memory, an HDD or an SSD; the memory 41 may also include a memory of the above kind combination.

When the USB device is running, the processor 40 may perform the method and the process described in FIG. 3, FIG. 4 or FIG.

The processor 40 is configured to receive, by using the USB transmission interface 42, a handover request message sent by the first USB device, and send, by using the USB transmission interface 42 to the first USB device, a message corresponding to the handover request message. And switching a response message, where the switch request message carries a first USB driver version, where the switch request message is used to request the USB device to switch the second USB driver version to the first USB driver version, The second USB driver version is a USB driver version currently used by the first USB device and the USB device, and the switch response message is used to indicate whether the USB device allows to switch the second USB driver version to The first USB driver version; the processor 40 is further configured to: if the switch response message indicates that the USB device allows to switch the second USB driver version to the first USB driver version, The second USB driver version is switched to the first USB driver version; the memory 41 is configured to store a code of the handover request message, a code of the handover response message, and the first USB driver The version, the second USB driver version, and a software program that controls the processor 40 to perform the above process, the processor 40 accomplishes the above process by executing the software program and calling the above code and USB driver version. The code may include a code for switching the request message and a code for switching the response message; the USB driver version may include the first USB driver version and the second USB driver version.

Optionally, the processor 40 is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; a second register corresponding to the second USB driver version is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to be the first The first data transmission line corresponding to the USB driver version.

Optionally, the processor 40 is further configured to: if the switch response message indicates that the USB device allows to switch the second USB driver version to the first USB driver version, After the USB device sends the handover response message corresponding to the handover request message, the USB transmission interface 42 receives the handover confirmation message sent by the first USB device, where the handover confirmation message is used to confirm the The first USB device switches the second USB driver version to the first USB driver version.

Optionally, the processor 40 is further configured to: after receiving the handover confirmation message sent by the first USB device, adopt the first USB driver version and the first A USB device performs data transmission.

An embodiment of the present invention provides another USB device, because the USB device and the first USB device negotiate whether to switch the USB driver version by using a handover request message and a handover response message. Therefore, during the transmission of the handover request message and the handover response message, the USB device and the first USB device are not disconnected, so that the USB device and the first USB device are in the process of switching the request message and switching. After the USB message version can be switched in response to the message negotiation, the USB driver version can be directly switched, and the switched USB driver version is used for data transmission. Compared with the prior art, since the USB connection between the USB device and the first USB device is not disconnected during the process of switching the USB driver version, the USB device and the USB device are switched after the USB driver version is switched. The USB driver version of the first USB device does not need to be re-established and renegotiated for data transmission, thereby ensuring that the USB device and the first USB device ensure uninterrupted service transmission between the two USB devices when switching the USB driver version. .

Embodiment 5

As shown in FIG. 14, an embodiment of the present invention provides a USB data transmission system, which may include a first USB device and a second USB device. Data transmission is performed between the first USB device and the second USB device through respective USB transmission interfaces.

It should be noted that FIG. 14 is merely an exemplary example, and the first USB device and the second USB device in FIG. 14 are also interchangeable.

The first USB device may be the USB device according to any one of the foregoing embodiments of FIG. 7 to FIG. 9; the second USB device may be any one of the foregoing third embodiment, as shown in any one of FIG. 10 to FIG. USB device. The USB device as described in any one of FIG. 7 to FIG. 9 may be a USB slave device, and the USB device as described in any one of FIG. 10 to FIG. 11 may be a USB slave device; or, as shown in FIG. 7 to FIG. 9 The USB device can be a USB slave device, and the USB device can be a USB host device according to any one of the embodiments of the present invention. The specific invention is not limited.

Alternatively, the first USB device may be the USB device as described in FIG. 12 in the above embodiment 4; the second USB device may be the USB device as described in FIG. 13 in the fourth embodiment, wherein, as shown in FIG. The USB device may be a USB host device, and the USB device as shown in FIG. 13 may be a USB slave device; or the USB device as shown in FIG. 12 may be a USB slave device, and the USB device as shown in FIG. 13 may be a USB host. The device is not limited by the specific invention.

It should be noted that, for the descriptions of the first USB device and the second USB device, refer to the related descriptions of the first USB device and the second USB device in the foregoing Embodiment 3 and Embodiment 4, and details are not described herein again.

In the USB data transmission system provided by the embodiment of the present invention, when the first USB device and the second USB device use the second USB driver version for data transmission, if the first USB device detects that the second USB driver version cannot meet the data transmission requirement The first USB device may send a handover request message to the second USB device, where the handover request message carries a first USB driver version, and the handover request message is used to request the second USB device to switch the second USB driver version to the first The USB driver version, after the second USB device receives the switch request message, the second USB device sends a switch response message to the first USB device, where the switch response message is used to indicate whether the second USB device supports switching the second USB driver version. For the first USB driver version, if the second USB device supports switching the second USB driver version to the first USB driver version, the second USB device switches the second USB driver version to the first USB driver version, and the first USB After the device receives the switch response message, the first USB device switches the second USB driver version to the first USB driver version, so that the first USB device and the second USB device A first data transmission with USB driver version.

An embodiment of the present invention provides a USB data transmission system, where the USB data transmission system may include a first USB device and a second USB device, because the first USB device and the second USB device pass the handover request message and the handover response report. Whether the USB driver version is switched, whether the first USB device and the second USB device are not disconnected during the switching request message and the switching response message transmission, so that the first USB device and the second USB device After the USB driver version can be switched after negotiation, the USB driver version can be directly switched, and the switched USB driver version is used for data transmission. Compared with the prior art, after switching the USB driver version, the first USB device and the second USB device do not need to re-establish connection and renegotiate for data transmission after switching the USB driver version. The USB driver version ensures that the first USB device and the second USB device ensure that the services transmitted between the two USB devices are not interrupted when the USB driver version is switched.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all of the methods described in various embodiments of the present invention. Or part of the steps. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A method for switching a universal serial bus USB driver version, comprising:

The first USB device sends a switch request message to the second USB device, where the switch request message carries a first USB driver version, and the switch request message is used to request the second USB device to use the second USB driver version. Switching to the first USB driver version, the second USB driver version being a USB driver version currently used by the first USB device and the second USB device;

The first USB device receives a handover response message corresponding to the handover request message sent by the second USB device, where the handover response message is used to indicate whether the second USB device allows the Switching the second USB driver version to the first USB driver version;

If the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, the first USB device switches the second USB driver version to The first USB driver version.
The method of claim 1, wherein the switching, by the first USB device, the second USB driver version to the first USB driver version comprises:

The first USB device switches a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version;

The first USB device switches a second register corresponding to the second USB driver version to a first register corresponding to the first USB driver version;

The first USB device switches a second data transmission line corresponding to the second USB driver version to a first data transmission line corresponding to the first USB driver version.
The method according to claim 1 or 2, wherein the first USB device sends a handover request message to the second USB device, including:

When the USB transmission interface in the first USB device transmits data simultaneously with the wireless module in the first USB device, the first USB device sends the handover request message to the second USB device, where The first USB driver version is a USB driver version lower than the second USB driver version.
The method according to claim 1 or 2, wherein the first USB device sends a handover request message to the second USB device, including:

When it is detected that the wireless module in the first USB device does not transmit data, and the USB driver version used by the first USB device to transmit data is not the highest USB driver version supported by the first USB device, the first The USB device sends the switching request message to the second USB device, the first USB driver version being a USB driver version higher than the second USB driver version.
The method according to claim 1 or 2, wherein the first USB device sends a handover request message to the second USB device, including:

The first USB device sends the switching request message to the second USB device according to a triggering operation of the user, where the triggering operation is triggered by the user operating a driving version switching menu or a driving version switching button.
The method according to claim 5, wherein before the first USB device sends a handover request message to the second USB device, the method further includes:

The first USB device generates the driver version switching menu or the driver version switching button according to a third USB driver version, and the driving version switching menu or the driving version switching button includes at least the first USB device selection Switching the first USB driver version, the third USB driver version is a USB driver version adopted after the first USB device and the second USB device establish a connection for the first time.
A method according to any one of claims 1 to 6, wherein

The first USB device is a USB host device, and the second USB device is a USB slave device; or

The first USB device is a USB slave device, and the second USB device is a USB master device.
A method for switching a universal serial bus USB driver version, comprising:

The second USB device receives the switch request message sent by the first USB device, where the switch request message carries the first USB driver version, and the switch request message is used to request the second USB device to drive the second USB drive The version is switched to the first USB driver version, The second USB driver version is a USB driver version currently used by the first USB device and the second USB device;

The second USB device sends a handover response message corresponding to the handover request message to the first USB device, where the handover response message is used to indicate whether the second USB device allows the second The USB driver version is switched to the first USB driver version;

If the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, the second USB device switches the second USB driver version to The first USB driver version.
The method according to claim 8, wherein the second USB device switches the second USB driver version to the first USB driver version, including:

The second USB device switches a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version;

The second USB device switches a second register corresponding to the second USB driver version to a first register corresponding to the first USB driver version;

The second USB device switches a second data transmission line corresponding to the second USB driver version to a first data transmission line corresponding to the first USB driver version.
Method according to claim 8 or 9, characterized in that

The first USB device is a USB host device, and the second USB device is a USB slave device; or

The first USB device is a USB slave device, and the second USB device is a USB master device.
A universal serial bus USB device, comprising:

a transceiver unit, configured to send a handover request message to the second USB device, and receive a handover response packet corresponding to the handover request packet sent by the second USB device, where the handover request packet carries the first a USB driver version, the switch request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, the second USB driver version is the USB device and the a USB driver version currently used by the second USB device, the switch response message being used to indicate whether the second USB device allows to switch the second USB driver version to the first USB driver version;

a switching unit, configured to: if the switch response message received by the transceiver unit indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, The USB driver version is switched to the first USB driver version.
The USB device according to claim 11, wherein

The switching unit is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; and to be associated with the second USB driver version Corresponding second register is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to correspond to the first USB driver version The first data transmission line.
A USB device according to claim 11 or 12, wherein

The transceiver unit is configured to: when the USB transmission interface in the USB device transmits data simultaneously with the wireless module in the USB device, send the handover request message to the second USB device, where the A USB driver version is a lower USB driver version than the second USB driver version.
A USB device according to claim 11 or 12, wherein

The transceiver unit is specifically configured to: when detecting that the wireless module in the USB device does not transmit data, and the USB driver version used by the USB device to transmit data is not the highest USB driver version supported by the USB device, The second USB device sends the switching request message, and the first USB driver version is a USB driver version higher than the second USB driver version.
A USB device according to claim 11 or 12, wherein

The transceiver unit is configured to send the switch request message to the second USB device according to a trigger operation of the user, where the trigger operation is triggered by the user operating a driver version switch menu or a driver version switch button.
The USB device according to claim 15, wherein the USB device further comprises a generating unit,

The generating unit is configured to generate the driver version cut according to the third USB driver version before the transceiver unit sends the switch request message to the second USB device Changing the menu or the driving version switching button, the driving version switching menu or the driving version switching button at least including the first USB driving version of the switching unit selection switching, the third USB driving version is The USB driver version adopted after the USB device and the second USB device establish a connection for the first time.
A USB device according to any one of claims 11-16, characterized in that

The USB device is a USB host device, and the second USB device is a USB slave device; or

The USB device is a USB slave device, and the second USB device is a USB master device.
A universal serial bus USB device, comprising:

The transceiver unit is configured to receive a handover request packet sent by the first USB device, and send a handover response packet corresponding to the handover request packet to the first USB device, where the handover request packet carries the first a USB driver version, the switch request message is used to request the USB device to switch a second USB driver version to the first USB driver version, and the second USB driver version is the first USB device and the a USB driver version currently used by the USB device, the switch response message is used to indicate whether the USB device allows to switch the second USB driver version to the first USB driver version;

a switching unit, configured to: if the switching response message sent by the transceiver unit indicates that the USB device allows to switch the second USB driver version to the first USB driver version, then the second USB driver The version is switched to the first USB driver version.
A USB device according to claim 18, wherein

The switching unit is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; and to be associated with the second USB driver version Corresponding second register is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to correspond to the first USB driver version The first data transmission line.
A USB device according to claim 18 or 19, wherein

The first USB device is a USB host device, and the USB device is a USB slave device; or

The first USB device is a USB slave device, and the USB device is a USB master device.
A universal serial bus USB device, comprising:

a processor, configured to send, by using a USB transmission interface, a handover request message to the second USB device, and receive, by using the USB transmission interface, a handover response message that is sent by the second USB device and corresponding to the handover request message, The switching request message carries a first USB driver version, and the switching request message is used to request the second USB device to switch the second USB driver version to the first USB driver version, the second USB The driver version is a USB driver version currently used by the USB device and the second USB device, and the switch response message is used to indicate whether the second USB device allows to switch the second USB driver version to the First USB driver version;

The processor is further configured to: if the switch response message indicates that the second USB device allows to switch the second USB driver version to the first USB driver version, then the second USB driver version Switch to the first USB driver version.
A USB device according to claim 21, wherein

The processor is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; and to be associated with the second USB driver version Corresponding second register is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to correspond to the first USB driver version The first data transmission line.
A USB device according to claim 21 or 22, wherein

The processor is configured to: when the USB transmission interface in the USB device transmits data simultaneously with the wireless module in the USB device, send the switching request to the second USB device by using the USB transmission interface The message, the first USB driver version is a USB driver version lower than the second USB driver version.
A USB device according to claim 21 or 22, wherein

The processor is specifically configured to: when detecting that the wireless module in the USB device does not transmit data, and the USB driver version used by the USB device to transmit data is not the highest USB driver version supported by the USB device, Said USB transmission interface to said second The USB device sends the switching request message, and the first USB driver version is a USB driver version higher than the second USB driver version.
A USB device according to claim 21 or 22, wherein

The processor is specifically configured to send, by using the USB transmission interface, the handover request message to the second USB device according to a trigger operation of the user, where the trigger operation is the user operating a driver version switching menu or driver The version switch button is triggered.
A USB device according to claim 25, wherein

The processor is further configured to generate the driver version switching menu or the driver version switching button according to a third USB driver version before sending the switching request message to the second USB device, where the driver The version switching menu or the driver version switching button includes at least the first USB driver version selected by the processor to switch, and the third USB driver version is when the USB device and the second USB device establish a connection for the first time USB driver version adopted after negotiation.
A USB device according to any one of claims 21-26, characterized in that

The USB device is a USB host device, and the second USB device is a USB slave device; or

The USB device is a USB slave device, and the second USB device is a USB master device.
A universal serial bus USB device, comprising:

a processor, configured to receive, by using a USB transmission interface, a handover request message sent by the first USB device, and send, by using the USB transmission interface, a handover response message corresponding to the handover request message to the first USB device, The switching request message carries a first USB driver version, and the switching request message is used to request the USB device to switch the second USB driver version to the first USB driver version, and the second USB driver version The switching response message is used to indicate whether the USB device allows to switch the second USB driver version to the first USB driver for the USB driver version currently used by the first USB device and the USB device. version;

The processor is further configured to: if the switch response message indicates that the USB device allows to switch the second USB driver version to the first USB driver version, switch the second USB driver version to The first USB driver version.
A USB device according to claim 28, wherein

The processor is specifically configured to switch a second USB driver corresponding to the second USB driver version to a first USB driver corresponding to the first USB driver version; and to be associated with the second USB driver version Corresponding second register is switched to a first register corresponding to the first USB driver version; and a second data transmission line corresponding to the second USB driver version is switched to correspond to the first USB driver version The first data transmission line.
A USB device according to claim 28 or 29, wherein

The first USB device is a USB host device, and the USB device is a USB slave device; or

The first USB device is a USB slave device, and the USB device is a USB master device.