WO2015176366A1

WO2015176366A1 - Universal serial bus drive method, computer and composite device

Info

Publication number: WO2015176366A1
Application number: PCT/CN2014/082091
Authority: WO
Inventors: 许金友
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-05-23
Filing date: 2014-07-11
Publication date: 2015-11-26
Also published as: CN105094880A

Abstract

Disclosed are a universal serial bus (USB) drive method, computer and composite device. After a computer and a composite device establish a connection, the computer transmits a descriptor acquisition command to the composite device; the computer receives a preset single-interface descriptor transmitted by the composite device; according to the obtained single-interface descriptor, the computer determines that the composite device is a single-interface device, and loads a preset user-defined drive. The computer of the present invention by not starting the composite device drive in a composite device enumeration process simplifies the composite device enumeration process performed by the computer, and improves enumeration efficiency. On the other hand, the computer of the present invention by not starting the composite device for enumeration, can also reduce the error rate in the development and maintenance of the device drive of the composite device, thus solving the problems of high costs and low efficiency of the development and production of the composite device.

Description

The present invention relates to the field of computer technologies, and in particular, to a method, a computer, and a composite device for driving a universal serial bus. BACKGROUND The enumeration method for a multi-interface universal serial bus (USB) device (ie, a composite device) is roughly as follows: a composite device is inserted into a computer (computer), and the computer obtains a descriptor of the composite device, and The descriptor is parsed, and the computer composite device driver loads the driver corresponding to each interface according to each interface of the composite device. Among them, the composite device is driven in the kernel layer of the computer, and in the enumeration process of the composite device, it takes a lot of work. Developers need computers to drive composite devices in various aspects of R&D, testing, production, and after-sales of composite devices. The operating system code of some computer operating systems (for example, Windows systems) is not open source, so developers can only Develop and maintain device drivers within composite devices. Composite device drivers are prone to errors due to a lot of work, resulting in equipment driver development and maintenance errors. If you want to seek support from operating system developers, you will have to pay high fees and cumbersome procedures. The cost and efficiency of composite equipment development and production are high. SUMMARY OF THE INVENTION The present invention provides a universal serial bus driving method, a computer, and a composite device, to at least solve the problem in the related art that a computer recognizes a composite device as a single interface device, and thus does not enable a composite device driver of the computer core to composite The problem with the device enumerating. To achieve the above object, the universal serial bus driving method provided by the present invention is applied to a computer, and includes the following steps: after the computer establishes a connection with the composite device, the computer sends a descriptor command to the composite device; and the computer receives the composite device to send the The preset single interface descriptor; the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads a preset custom driver. Preferably, the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and after loading the preset custom driving step, the method includes: the computer acquiring the multi-interface descriptor from the composite device; The multi-interface descriptor constructs a plurality of functional interfaces. Preferably, the step of the computer parsing the obtained multi-interface descriptor to construct a plurality of functional interfaces comprises: the computer constructing a plurality of the functional interfaces by using the multi-interface descriptor obtained by the application layer parsing; The layer generates a plurality of sub-devices or a plurality of operation handles according to the plurality of the functional interfaces constructed.

The universal serial bus driving method further provided by the present invention is applied to a composite device, comprising the steps of: receiving, by a composite device, a acquiring descriptor command sent by a computer to a composite device; and the composite device responding to the acquiring descriptor command, and The single interface descriptor is sent to the computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads a preset custom driver. Preferably, the composite device responds to the acquiring descriptor command, and sends a preset single interface descriptor to a computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads The step of the preset custom driver further includes: the composite device receiving a custom acquisition command sent by the computer; the composite device transmitting the multi-interface descriptor to the computer in response to the received custom acquisition command, for parsing by the computer Multiple interface descriptors and build multiple functional interfaces.

The computer further provided by the present invention, comprising: a command module, configured to send a get descriptor command to the composite device after establishing a connection with the composite device a descriptor module, configured to receive a preset single interface descriptor sent by the composite device; the driving module is configured to identify the composite device as a single interface device according to the obtained single interface descriptor, and load the preset self Define the driver. Preferably, the computer further includes: an obtaining module, configured to acquire a multi-interface descriptor from the composite device; a building module, configured to parse the obtained multi-interface descriptor, and construct a plurality of functional interfaces. Preferably, the building module includes: a building unit, configured to parse the multi-interface descriptor obtained by the application layer to construct a plurality of the function interfaces; and generating a unit, configured to be configured by the application layer according to the plurality of A functional interface that generates multiple child devices or multiple action handles.

The composite device further provided by the present invention, comprising: a first receiving module, configured to receive an acquisition descriptor command sent by a computer to a composite device; a first sending module, configured to respond to the acquiring descriptor command, and to preset a single The interface descriptor is sent to the computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads a preset custom driver. Preferably, the composite device further includes: a second receiving module, configured to receive a custom acquisition command sent by the computer; and a second sending module, configured to send the multi-interface descriptor in response to the received custom acquisition command To the computer, the computer parses the multi-interface descriptor and constructs multiple functional interfaces.

After the computer establishes a connection with the composite device, the computer sends a get descriptor command to the composite device; the computer receives the preset single interface descriptor sent by the composite device; and the computer determines, according to the obtained single interface descriptor, the composite device Single interface device, and load preset custom drivers. The computer of the present invention acquires complex After the single interface descriptor sent by the device, the composite device is identified as a single interface device, so the composite device driver is not enabled during the enumeration of the composite device, which simplifies the process of enumerating the composite device by the computer, and improves the enumeration process. The efficiency of the exercise. On the other hand, the computer of the present invention does not enable the enumeration of the composite device, and can reduce the error rate when developing and maintaining the device driver of the composite device, thereby solving the problems of high cost and low efficiency of the development and production of the composite device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flow chart of a first embodiment of a driving method of a universal serial bus according to the present invention; FIG. 2 is a schematic flowchart of a driving method of a universal serial bus according to a second embodiment of the present invention; FIG. 4 is a schematic diagram of functional modules of a first embodiment of a computer according to the present invention; FIG. 5 is a schematic diagram of functional modules of a second embodiment of a computer according to the present invention; FIG. 7 is a schematic diagram of functional modules of a first embodiment of a composite device according to the present invention; FIG. 8 is a schematic diagram of functional blocks of a preferred embodiment of a composite device according to the present invention.

The implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be understood by those skilled in the art that in the following embodiments of the driving method and system of the universal serial bus of the present invention, the composite device refers to a USB device capable of performing the functions of two or more different devices. The invention provides a universal serial bus driving method applied to a computer. Referring to FIG. 1, FIG. 1 is a schematic flow chart of a first embodiment of a driving method of a universal serial bus according to the present invention. In a first embodiment of the driving method of the universal serial bus, the method comprises the following steps: Step S10, after the computer establishes a connection with the composite device, the computer sends a get descriptor command to the composite device; step S20, the computer receives the preset single interface descriptor sent by the composite device; step S30, the computer obtains the single interface according to the single interface The descriptor determines that the composite device is a single interface device and loads the preset custom driver. Single interface descriptors are pre-set and saved in the composite device. The single interface descriptor does not reflect the real device information of the composite device. The content of the single interface descriptor reflects the information of a single interface device, which is equivalent to a virtual descriptor. Custom drivers are pre-configured based on a single interface descriptor and installed into the kernel layer of the computer. After the computer and the composite device establish a connection, the computer begins enumerating the composite device, that is, obtaining some information of the composite device, and according to the information, loading the appropriate device for the composite device. For example, the computer sends a get descriptor command to the composite device. After receiving the get descriptor command sent by the computer, the composite device does not send the composite composite real descriptor to the computer, but sends the preset single interface descriptor. To the computer. The computer parses the obtained single interface descriptor. Since the single interface descriptor contains only information about a single interface device, the computer determines that the composite device is a single interface device and does not recognize the real information of the composite device. Since the computer determines that the composite device is a single interface device, the enumeration process does not require the use of a composite device driver, and can directly find a custom driver according to the single interface descriptor, and load a preset custom driver, such as loading with a bus driver. Define the driver. In this embodiment, after the computer establishes a connection with the composite device, the computer sends a get descriptor command to the composite device; the computer receives the preset single interface descriptor sent by the composite device; and the computer determines the composite device according to the obtained single interface descriptor. As a single interface device, and load a preset custom driver. After obtaining the single interface descriptor sent by the composite device, the computer in the embodiment determines that the composite device is a single interface device, so the composite device driver is not enabled in the process of enumerating the composite device, which simplifies enumeration of the composite device by the computer. The process improves the efficiency of the enumeration. On the other hand, the computer of the present invention does not enable the enumeration of the composite device, and can reduce the error rate when developing and maintaining the device driver of the composite device, thereby solving the problems of high cost and low efficiency of the development and production of the composite device. It can be understood by those skilled in the art that before the step of sending a descriptor command to the composite device by the computer, the following steps may be further included: the computer determines the speed type of the composite device; the computer resets the composite device; and establishes an information channel of the computer and the composite device; The computer gets the maximum packet length for the default pipe. These steps are more conventional and are not limited by the present invention, and one skilled in the art can perform one or more of these steps as needed.

In a preferred embodiment of the present invention, the single interface descriptor includes a single interface device descriptor and a single interface configuration descriptor, and the single interface configuration descriptor includes an interface descriptor of a preset one interface. By obtaining the single interface device descriptor, the computer can obtain information such as the manufacturer identification number, the product serial number, the device class number, the maximum packet length of the default endpoint, and the number of configuration descriptors. The computer obtains the information such as the length of the configuration descriptor, the power supply mode, and the maximum power consumption by obtaining the single interface configuration descriptor. The single interface configuration descriptor includes an interface descriptor of the interface, and the computer can obtain specific information of an interface. Therefore, the computer determines that the composite device is a single interface device according to the single interface descriptor. Of course, the present invention does not limit the single interface descriptor to include a string descriptor, an endpoint descriptor, and the like. The form of the single interface descriptor of the present invention is a USB standard descriptor, thus facilitating the computer to determine and read the single interface descriptor.

Referring to FIG. 2, FIG. 2 is a schematic flowchart diagram of a second embodiment of a driving method of a universal serial bus according to the present invention. In the second embodiment of the driving method of the universal serial bus of the present invention, the difference between this embodiment and the first embodiment is that, according to the first embodiment, the computer is described according to the obtained single interface. After determining that the composite device is a single interface device, and loading the preset custom driving step, the method includes: Step S40: The computer acquires the multi-interface descriptor from the composite device; Step S50, the computer parses the obtained multi-interface descriptor, constructs Multiple functional interfaces. The computer obtains the multi-interface descriptor from the composite device, for example, the computer sends the acquisition instruction to the composite device, and the composite device sends the multi-interface descriptor to the computer in response to the acquisition instruction; or the computer can acquire the multi-interface from the composite device through some applications. Descriptor; or, other suitable ways to obtain a multi-interface descriptor. After the computer obtains the multi-interface descriptor, the descriptor is parsed, and the computer can obtain the real device information of the composite device by parsing, for example, the device class number, the maximum packet length of the default endpoint, the interface information, and the port. Information, etc. The computer generates a plurality of functional interfaces, such as a modem (Modem) interface, an control (AT) interface, and a USB flash drive interface, according to the real device information of the composite device obtained by the parsing, and generates a plurality of logical channel supply programs and a composite device. Interaction.

In a preferred embodiment of the present invention, the step of the computer acquiring the multi-interface descriptor from the composite device comprises: the computer sending a custom acquisition command to the application layer of the composite device through the application layer; and the computer receiving the application layer of the composite device through the application layer A multi-interface descriptor sent in response to the custom get command. The computer includes an application layer and a kernel layer, and the composite device includes an application layer and a kernel layer. The user-side technician can set the custom acquisition command, and set the corresponding protocol according to the custom acquisition command in the application layer of the computer and the application layer of the composite device, and the computer sends a custom acquisition command to the composite device through the application layer. In the application layer, the composite device can immediately recognize and respond to the custom acquisition command through the application layer. This embodiment preferably customizes the command to obtain the USB standard format under the USB protocol. The step of the computer acquiring the multi-interface descriptor from the composite device is performed in the application layer of the computer. Since the kernel layer of the computer is not involved, the user-side technician can more conveniently and quickly debug the custom acquisition command and the multi-interface descriptor. Or set, and the cost is lower.

In a preferred embodiment of the present invention, the step of the computer parsing the obtained multi-interface descriptor to generate a plurality of functional interfaces includes: the computer parsing the obtained multi-interface descriptor through an application layer, and constructing the plurality of Functional interface; the computer generates a plurality of sub-devices or multiple operation handles according to a plurality of the functional interfaces constructed by the application layer. The computer parses the obtained multi-interface descriptors by the application layer, constructs a plurality of the functional interfaces, and generates a plurality of sub-devices according to the plurality of the functional interfaces that are constructed, and the application program opens the sub-devices and the composite device. Data interaction is performed; or, multiple file operation handles are generated, and the application program directly calls the file operation handle to perform data interaction with the composite device. In this embodiment, multiple sub-devices or multiple operation handles are generated, which facilitates data interaction between the application and the composite device through the sub-device or multiple operation handles. In this embodiment, complex operations such as generating multiple functional interfaces are performed at the application layer of the computer, and the kernel layer of the computer is not required to be executed. Therefore, the driving of the composite device is more controllable, and the debugging is more convenient, and the cost is lower.

The invention further provides a universal serial bus driving method for a composite device. Referring to FIG. 3, FIG. 3 is a schematic flowchart diagram of an embodiment of a driving method of a universal serial bus according to the present invention. In an embodiment of the driving method of the universal serial bus of the present invention, the method includes the following steps: Step S01, the composite device receives an acquisition descriptor command sent by the computer to the composite device; Step S02, the composite device responds to the acquisition descriptor command And sending a preset single interface descriptor to the computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads the preset custom driver. Single interface descriptors are pre-set and saved in the composite device. The single interface descriptor does not reflect the real device information of the composite device. The content of the single interface descriptor reflects the information of a single interface device, which is equivalent to a virtual descriptor. Custom drivers are pre-configured based on a single interface descriptor and installed into the kernel layer of the computer. After the computer and the composite device establish a connection, the computer begins enumerating the composite device, that is, obtaining some information of the composite device, and according to the information, loading the appropriate device for the composite device. The computer sends a Get Descriptor command to the composite device. The composite device responds to the acquiring descriptor command, and sends a preset single interface descriptor to the computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads the preset customization. drive. For example, the computer sends a get descriptor command to the composite device. After receiving the get descriptor command sent by the computer, the composite device does not send the composite composite real descriptor to the computer, but sends the preset single interface descriptor. To the computer. The computer parses the obtained single interface descriptor. Since the single interface descriptor contains only information about a single interface device, the computer determines that the composite device is a single interface device and does not recognize the real information of the composite device. Since the computer determines that the composite device is a single interface device, the enumeration process does not require the use of a composite device driver, and can directly find a custom driver according to the single interface descriptor, and load a preset custom driver, such as loading with a bus driver. Define the driver. In this embodiment, the composite device receives the acquisition descriptor command sent by the computer to the composite device; the composite device responds to the acquisition descriptor command, and sends the preset single interface descriptor to the computer for the computer to describe according to the obtained single interface. , determines that the composite device is a single interface device, and loads the preset custom driver. In this embodiment, the composite device sends a single interface descriptor to the computer, and the computer determines that the composite device is a single interface device according to the single interface descriptor, so the computer does not enable the composite device driver during the enumeration process of the composite device, simplifying the computer to composite The process of enumerating devices increases the efficiency of enumerations. On the other hand, the computer of the present invention does not enable the enumeration of the composite device, and can reduce the error rate when developing and maintaining the device driver of the composite device, thereby solving the problems of high cost and low efficiency of the development and production of the composite device.

In a preferred embodiment of the present invention, the composite device responds to the acquiring descriptor command, and sends a preset single interface descriptor to a computer, where the computer determines, according to the obtained single interface descriptor, that the composite device is a single After the step of loading the preset custom driver, the method further includes: the composite device receiving a custom acquisition command sent by the computer; and the composite device transmitting the multi-interface descriptor to the computer in response to the received custom acquisition command, The computer parses the multi-interface descriptor and constructs a plurality of functional interfaces. The user-side technician can set the custom acquisition command, and set the corresponding protocol according to the custom acquisition command in the computer and the composite device. When the computer sends the custom acquisition command to the application layer of the composite device through the application layer, The composite device can immediately recognize and respond to the custom acquisition command through the application layer. This embodiment preferably customizes the command to obtain the USB standard format under the USB protocol. After the computer obtains the multi-interface descriptor, the descriptor is parsed, and the computer can obtain the real device information of the composite device by parsing, for example, the device class number, the maximum packet length of the default endpoint, the interface information, and the port. Information, etc. The computer generates a plurality of functional interfaces, such as a modem (Modem) interface, an control (AT) interface, and a USB flash drive interface, according to the real device information of the composite device obtained by the parsing, and generates a plurality of logical channel supply programs and a composite device. Interaction.

In a preferred embodiment of the present invention, the step of establishing a connection between the computer and the composite device further comprises: the composite device loading the customized device driver according to the multi-interface descriptor. A custom device driver is a driver that is set by the user-side technician based on the multi-interface descriptor of the composite device. After the computer establishes a connection with the composite device, and after the composite device is powered on, the composite device loads the custom device driver according to the multi-interface descriptor, and the composite device drives itself to perform data interaction with the computer.

The invention further provides a computer. Referring to FIG. 4, FIG. 4 is a schematic diagram of functional modules of a first embodiment of a computer according to the present invention. In a first embodiment of the computer, the computer includes: a command module 10 configured to send an acquire descriptor command to the after establishing a connection; The descriptor module 20 is configured to receive a preset single interface descriptor sent by the composite device, and the driving module 30 is configured to determine, according to the obtained single interface descriptor, that the composite device is a single interface device, and load the preset Custom drive. The single interface descriptor is pre-set by the composite device and stored in the composite device. The single interface descriptor does not reflect the real device information of the composite device. The content of the single interface descriptor reflects the information of a single interface device, which is equivalent to a virtual descriptor. Custom drivers are pre-configured based on a single interface descriptor and installed into the kernel layer of the computer. After the computer and the composite device establish a connection, the computer begins enumerating the composite device, that is, obtaining some information of the composite device, and according to the information, loading the appropriate device for the composite device. For example, the command module 10 sends a get descriptor command to the composite device. After receiving the get descriptor command sent by the command module 10, the composite device does not send the composite composite real descriptor to the descriptor module 20, but instead The set single interface descriptor is sent to the descriptor module 20. The driving module 30 parses the obtained single interface descriptor. Since the single interface descriptor only contains information of a single interface device, the driving module 30 determines that the composite device is a single interface device, and does not recognize the real information of the composite device. . Since the driver module 30 determines that the composite device is a single interface device, the enumeration process does not require the use of a composite device driver, and can directly find a custom driver according to the single interface descriptor, and load a preset custom driver, such as a bus driver. Load a custom driver. In this embodiment, after the computer establishes a connection with the composite device, the command module 10 sends an acquisition descriptor command to the composite device; the descriptor module 20 receives the preset single interface descriptor sent by the composite device; and the driving module 30 obtains the single The interface descriptor determines that the composite device is a single interface device and loads the preset custom driver. After obtaining the single interface descriptor sent by the composite device, the computer in the embodiment determines that the composite device is a single interface device, so the composite device driver is not enabled in the process of enumerating the composite device, which simplifies enumeration of the composite device by the computer. The process improves the efficiency of the enumeration. On the other hand, the computer of the present invention does not enable the enumeration of the composite device, and can reduce the error rate when developing and maintaining the device driver of the composite device, thereby solving the problems of high cost and low efficiency of the development and production of the composite device.

As can be understood by those skilled in the art, the computer may further include the following steps: a judging module (not shown) configured to determine the speed type of the composite device by the computer; a reset module (not shown), set to reset Composite device; channel module (not shown), set to establish the information channel of the computer and composite device; default pipe module (not shown), set to get the maximum packet length of the default pipe. These steps are more conventional and are not limited by the present invention, and one skilled in the art can perform one or more of these steps as needed.

In a preferred embodiment of the present invention, the single interface descriptor includes a single interface device descriptor and a single interface configuration descriptor, and the single interface configuration descriptor includes an interface descriptor of a preset one interface. The driver module 30 obtains information such as the manufacturer identification number, the product serial number, the device class number, the maximum packet length of the default endpoint, and the number of configuration descriptors by acquiring the single interface device descriptor. The driving module 30 obtains the information of the length of the composite device, the power supply mode, the maximum power consumption, and the like by acquiring the single interface configuration descriptor, and the single module interface descriptor includes an interface descriptor of the interface, and the driving module 30 can The specific information of one interface of the composite device is obtained. Therefore, the driving module 30 determines that the composite device is a single interface device according to the single interface descriptor. Of course, the present invention does not limit the single interface descriptor to include a string descriptor, an endpoint descriptor, and the like. The form of the single interface descriptor of the present invention is a USB standard descriptor, thus facilitating the drive module 30 to determine and read the single interface descriptor.

Referring to FIG. 5, FIG. 5 is a schematic diagram of functional modules of a second embodiment of a computer according to the present invention. In the second embodiment of the computer of the present invention, the difference between the embodiment and the first embodiment is that, in addition to the first embodiment, the computer further includes: an acquiring module 40, configured to The composite device acquires a multi-interface descriptor; the building module 50 is configured to parse the obtained multi-interface descriptor to construct a plurality of functional interfaces. The obtaining module 40 acquires a multi-interface descriptor from the composite device, for example, the computer sends a fetch instruction to the composite device, and the composite device sends the multi-interface descriptor to the obtaining module 40 in response to the fetching instruction; or the obtaining module 40 can pass some applications. Obtain a multi-interface descriptor from a composite device; or, in other suitable ways, obtain a multi-interface descriptor. After the obtaining module 40 obtains the multi-interface descriptor, the building module 50 parses the descriptor, and by parsing, the building module 50 can obtain the real device information of the composite device, for example, the device class number and the maximum packet length of the default endpoint. , interface information, port information, etc. The building module 50 generates a plurality of functional interfaces, such as a modem (Modem) interface, an control (AT) interface, and a U disk interface, according to the real device information of the synthesized composite device, and generates a plurality of logical channel supply programs and composites. The device interacts.

In a preferred embodiment of the invention. The obtaining module 40 further includes: an obtaining unit (not shown) configured to send a custom obtaining command to the application layer of the composite device through the application layer; a receiving unit (not shown) configured to pass the application layer Receiving a multi-interface descriptor sent by an application layer of the composite device in response to the custom acquisition command. The computer includes an application layer and a kernel layer, and the composite device includes an application layer and a kernel layer. The user-side technician can set the custom acquisition command, and set the corresponding protocol according to the custom acquisition command in the application layer of the computer and the application layer of the composite device, and the acquisition unit sends the custom acquisition command to the composite through the application layer. When in the application layer of the device, the composite device can immediately recognize and respond to the custom acquisition command through the application layer. This embodiment preferably customizes the command to obtain the USB standard format under the USB protocol. The step of the computer acquiring the multi-interface descriptor from the composite device is performed in the application layer of the computer. Since the kernel layer of the computer is not involved, the user-side technician can more conveniently and quickly debug the custom acquisition command and the multi-interface descriptor. Or set, and the cost is lower.

Referring to FIG. 6, FIG. 6 is a schematic diagram of functional units of the building module 50 in the computer of FIG. 5. In a preferred embodiment of the present invention, the building module 50 includes: a building unit 51, configured to parse the multi-interface descriptor obtained by the application layer to construct a plurality of the function interfaces; and the generating unit 52 is configured to pass The application layer generates a plurality of child devices or a plurality of operation handles according to the plurality of the functional interfaces constructed. The constructing unit 51 constructs a plurality of the functional interfaces by using the multi-interface descriptor obtained by the application layer parsing, and the generating unit 52 generates a plurality of sub-devices according to the plurality of the functional interfaces that are constructed, and the supplying program opens the sub-devices. Data interaction with the composite device; or, generate multiple file operation handles, the application directly calls the file operation handle to interact with the composite device for data interaction. In this embodiment, multiple sub-devices or multiple operation handles are generated, which facilitates data interaction between the application and the composite device through the sub-device or multiple operation handles. In this embodiment, complex operations such as generating multiple functional interfaces are performed at the application layer of the computer, and the kernel layer of the computer is not required to be executed. Therefore, the driving of the composite device is more controllable, and the debugging is more convenient, and the cost is lower.

The invention further provides a composite device. Referring to FIG. 7, FIG. 7 is a schematic diagram of functional modules of a first embodiment of a composite device according to the present invention. In the first embodiment of the composite device of the present invention, the composite device includes: a first receiving module 01 configured to receive an acquisition descriptor command sent by the computer to the composite device; and a first sending module 02 configured to respond to the obtaining descriptor The command sends the preset single interface descriptor to the computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads the preset custom driver. Single interface descriptors are pre-set and saved in the composite device. The single interface descriptor does not reflect the real device information of the composite device. The content of the single interface descriptor reflects the information of a single interface device, which is equivalent to a virtual descriptor. Custom drivers are pre-configured based on a single interface descriptor and installed into the kernel layer of the computer. After the computer and the composite device establish a connection, the computer begins enumerating the composite device, that is, obtaining some information of the composite device, and according to the information, loading the appropriate device for the composite device. The computer sends a Get Descriptor command to the composite device. The first receiving module 01 receives the acquisition descriptor command sent by the computer, and the first sending module 02 responds to the acquiring descriptor command, and sends the preset single interface descriptor to the computer, and the computer describes the single interface according to the obtained , determines that the composite device is a single interface device, and loads the preset custom driver. For example, the computer sends a get descriptor command to the composite device. After the first receiving module 01 receives the get descriptor command sent by the computer, the first sending module 02 does not send the composite composite real descriptor to the computer, but instead A preset single interface descriptor is sent to the computer. The computer parses the obtained single interface descriptor. Since the single interface descriptor contains only information about a single interface device, the computer determines that the composite device is a single interface device and does not recognize the real information of the composite device. Since the computer determines that the composite device is a single interface device, the enumeration process does not require the use of a composite device driver, and can directly find a custom driver according to the single interface descriptor, and load a preset custom driver, such as loading with a bus driver. Define the driver. In this embodiment, the first receiving module 01 receives the acquisition descriptor command sent by the computer to the composite device; the first sending module 02 responds to the acquiring descriptor command, and sends the preset single interface descriptor to the computer for obtaining by the computer according to the acquisition. The single interface descriptor determines that the composite device is a single interface device and loads a preset custom driver. In this embodiment, the first sending module 02 sends a single interface descriptor to the computer, and the computer determines that the composite device is a single interface device according to the single interface descriptor, so the computer does not enable the composite device driver during the enumeration of the composite device, which simplifies The process of enumerating a composite device by a computer improves the efficiency of enumeration. On the other hand, the computer of the present invention does not enable the enumeration of the composite device, and can reduce the error rate when developing and maintaining the device driver of the composite device, thereby solving the problems of high cost and low efficiency of the development and production of the composite device.

Referring to FIG. 8, FIG. 8 is a schematic diagram of a functional module of a preferred embodiment of the composite device according to the present invention. In a preferred embodiment of the present invention, the composite device further includes: a second receiving module 03, configured to receive a custom acquisition command sent by the computer. The second sending module 04 is configured to send the multi-interface descriptor to the computer in response to the received custom acquisition command, for the computer to parse the multi-interface descriptor, and construct a plurality of functional interfaces. The user-side technician can set the custom acquisition command, and set the corresponding protocol according to the custom acquisition command in the computer and the composite device. When the computer sends the custom acquisition command to the application layer of the composite device through the application layer, The composite device can immediately recognize and respond to the custom acquisition command through the application layer. This embodiment preferably customizes the command to obtain the USB standard format under the USB protocol. After the computer obtains the multi-interface descriptor, the descriptor is parsed, and the computer can obtain the real device information of the composite device by parsing, for example, the device class number, the maximum packet length of the default endpoint, the interface information, and the port. Information, etc. The computer generates a plurality of functional interfaces, such as a modem (Modem) interface, an control (AT) interface, and a USB flash drive interface, according to the real device information of the composite device obtained by the parsing, and generates a plurality of logical channel supply programs and a composite device. Interaction.

In a preferred embodiment of the present invention, the composite device further includes: a load driving module (not shown) configured to load a custom device driver according to the multi-interface descriptor. The custom device driver is a driver set by the user-side technician based on the multi-interface descriptor of the composite device. After the computer establishes a connection with the composite device, and after the composite device is powered on, the load driver module loads the custom device driver according to the multi-interface descriptor, and the composite device drives itself to perform data interaction with the computer. The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are used directly or indirectly in other related technical fields. The same is included in the scope of patent protection of the present invention. INDUSTRIAL APPLICABILITY As described above, a universal serial bus driving method, a computer, and a composite device provided by the embodiments of the present invention have the following beneficial effects: The process of enumerating a composite device by a computer is simplified, and the efficiency of enumeration is improved. . On the other hand, the computer of the present invention does not enable the enumeration of the composite device, and can reduce the error rate when developing and maintaining the device driver of the composite device, thereby solving the problems of high cost and low efficiency of the development and production of the composite device.

Claims

The invention relates to a method for driving a universal serial bus, which is applied to a computer, comprising the following steps: after a connection is established between a computer and a composite device, the computer sends a descriptor command to the composite device; and the computer receives the preset sent by the composite device. Single interface descriptor

The computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads a preset custom driver. The universal serial bus driving method according to claim 1, wherein the computer determines that the composite device is a single interface device according to the obtained single interface descriptor, and loads the preset custom driving step, and then includes : The computer obtains a multi-interface descriptor from the composite device;

The computer parses the obtained multi-interface descriptor to construct a plurality of functional interfaces. The method of driving a universal serial bus according to claim 2, wherein the step of the computer parsing the acquired multi-interface descriptor to construct a plurality of functional interfaces comprises:

The computer constructs a plurality of the functional interfaces by parsing the obtained multi-interface descriptors by the application layer; the computer generates a plurality of sub-devices or a plurality of operation handles according to the plurality of the functional interfaces that are built by the application layer. A universal serial bus driving method for a composite device includes the following steps:

The composite device receives the acquisition descriptor command sent by the computer to the composite device; the composite device responds to the acquisition descriptor command, and sends the preset single interface descriptor to the computer, and the computer determines, according to the obtained single interface descriptor, The composite device is a single interface device and loads a preset custom drive. The method of driving a universal serial bus according to claim 4, wherein the composite device responds to the acquisition descriptor command and sends a preset single interface descriptor to a computer for the computer to obtain according to the acquired The single interface descriptor, after determining that the composite device is a single interface device, and loading the preset custom driver, further includes:

The composite device receives a custom acquisition command sent by the computer; The composite device sends the multi-interface descriptor to the computer in response to the received custom acquisition command, for the computer to parse the multi-interface descriptor, and construct a plurality of functional interfaces. , a computer, comprising:

a command module, configured to send a get descriptor command to the composite device after establishing a connection with the composite device;

a descriptor module, configured to receive a preset single interface descriptor sent by the composite device; the driving module is configured to determine, according to the obtained single interface descriptor, that the composite device is a single interface device, and load the preset self Define the driver. The computer according to claim 6, wherein the computer further comprises: an obtaining module, configured to acquire a multi-interface descriptor from the composite device;

The building module is configured to parse the obtained multi-interface descriptor and construct a plurality of functional interfaces. The computer of claim 7, wherein the building module comprises:

a building unit, configured to construct a plurality of the functional interfaces by using the multi-interface descriptor obtained by the application layer parsing;

And generating a unit, configured to generate, by the application layer, a plurality of sub-devices or a plurality of operation handles according to the plurality of the functional interfaces constructed. a composite device, comprising: a first receiving module, configured to receive an acquisition descriptor command sent by a computer to a composite device; a first sending module, configured to respond to the acquiring descriptor command, and to describe a preset single interface The symbol is sent to the computer, and the computer determines, according to the obtained single interface descriptor, that the composite device is a single interface device, and loads the preset custom driver. The composite device of claim 9, wherein the composite device further comprises: a second receiving module, configured to receive a custom acquisition command sent by the computer;

And a second sending module, configured to send the multi-interface descriptor to the computer in response to the received custom acquisition command, for the computer to parse the multi-interface descriptor, and construct a plurality of functional interfaces.