CN107003974A - A kind of interface detection method and device - Google Patents

Abstract

A kind of interface detection method and device, methods described include：Detect the interface pin (101) of terminal；If being the first level for the interface pin for inserting detection, determining the expansion interface of terminal has expansion equipment insertion；The interface chip of the expansion equipment is suspended in bus (102)；Power-up initializing is carried out to the expansion equipment, the facility information of the expansion equipment is read by bus；The facility information includes device id (103)；The device type (104) of the expansion equipment is determined according to the device id.The expansion equipment of insertion is suspended in bus by methods described, when the interface pin for inserting detection is the first level, the device type of the expansion equipment is read by bus, it is adaptable to which various types of interface detections, autgmentability is stronger.

Description

Method and device for interface detection

technical field

The present invention relates to the technical field of terminals, in particular to an interface detection method and device.

Background technique

A cloud robot is an intelligent robot that puts the cognitive system in the cloud, puts the body, drive, and sensors on the robot body, and connects the two through mobile communication; the cloud robot is the development direction of intelligent humanoid robots.

With the continuous development of terminal technology, there are more and more types of terminal products, such as smart phones, computers, pads, etc. At present, most terminals include one or more interfaces, which are used to insert USB, earphones, or data cables into these corresponding interfaces so as to establish a connection with the terminal to realize corresponding functions.

In the prior art, the USB interface can only be inserted into a USB device, and the earphone interface can only be inserted into an earphone device, etc. When the USB device is inserted into the USB interface, and the earphone device is inserted into the earphone interface, the terminal usually uses a hardware interrupt to notify the system , to determine whether the interface is plugged into the device according to the voltage of the pin of the corresponding interface.

The deficiencies in the prior art are:

The device type is detected by the voltage level. Since the voltage classification is difficult to control, it can only support a very small number of simple devices, such as USB, earphones, etc., and the scalability is not strong.

Contents of the invention

The embodiment of the present invention proposes an interface detection method and device, which is used to solve the problem of detecting the type of equipment through voltage level in the prior art. Since the voltage classification is difficult to control, it can only support a small number of simple equipment, and the expansion is not strong. technical problem.

In one aspect, an embodiment of the present invention provides an interface detection method, including the following steps:

Detect the interface pins of the terminal;

If the interface pin used for insertion detection is at the first level, it is determined that an expansion device is inserted into the interface of the terminal; the interface chip of the expansion device is connected to the bus;

Perform power-on initialization on the expansion device, and read the device information of the expansion device through the bus; the device information includes a device identification ID;

Determine the device type of the extension device according to the device ID.

In another aspect, an embodiment of the present invention provides an interface detection device, including:

A detection module, configured to detect interface pins of the terminal;

The first determination module is configured to determine that an expansion device is inserted into the interface of the terminal if the interface pin used for insertion detection is at the first level;

A hooking module, configured to hang the interface chip of the expansion device on the bus;

A reading module, configured to power-on and initialize the expansion device, and read the device information of the expansion device through the bus; the device information includes a device ID;

A second determining module, configured to determine the device type of the extension device according to the device ID.

Beneficial effects are as follows:

The current method of detecting device types through voltage levels is difficult to control due to voltage grading, and can only support a small number of simple devices and poor scalability. Due to the technical solution provided by the embodiment of the present invention, it can be detected through the interface tube of the terminal Pin, when the interface pin used for insertion detection is at the first level, it is determined that an expansion device is inserted into the interface of the terminal, and the expansion device is connected to the bus. After the expansion device is powered on and initialized, it can be read through the bus. The device type of the expansion device is obtained. The embodiment of the present invention can support the insertion of more types of expansion devices, and the scalability is better. Only a very small number of interface devices and technical problems with poor scalability can be detected.

Description of drawings

Specific embodiments of the present invention will be described below with reference to the accompanying drawings, wherein:

Fig. 1 is a schematic flow chart of the implementation of the interface detection method in the embodiment of the present invention;

FIG. 2 is a schematic diagram of an interface detection process in an embodiment of the present invention;

Fig. 3 is a structural schematic diagram 1 of an interface detection device in an embodiment of the present invention;

Fig. 4 is a schematic structural diagram II of an interface detection device in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram III of the interface detection device in the embodiment of the present invention;

6 is a schematic structural diagram of a mobile phone inserted into an expansion device in an embodiment of the present invention;

Fig. 7 shows a schematic structural diagram of a pad plug-in expansion device in an embodiment of the present invention.

detailed description

In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all implementations. Exhaustive list of examples. And in the case of no conflict, the embodiments in this description and the features in the embodiments can be combined with each other.

The inventor noticed during the invention that:

In the prior art, terminals such as mobile phones and computers can only notify the system through hardware interrupts, and then the system detects the specific type of the device through switching and judging the hardware status. When an interruption is detected, the pin voltage of the standard interface on the mobile phone or the computer is obtained, and it is determined whether the standard interface is inserted into the device corresponding to the interface according to the comparison between the pin voltage and the preset voltage.

The system detects by means of voltage level, and can only simply detect the type of equipment, and cannot obtain information such as the specific version and manufacturer of the equipment; moreover, the existing equipment detection is difficult to control due to the classification of voltage, so it can only support a very small number of Simple devices, such as USB, UART and other standard interface devices, these devices usually have only a few pins (for example: 3pin), and can only determine whether to insert the corresponding device by obtaining the voltage of the pin and according to the value of the voltage ( For example: VBUS reaching 5v means that USB is plugged in, etc.), the usage scenarios are limited, the scalability is not strong, and it cannot be applied to composite interface devices with complex functions (for example: 68pin).

In view of the above deficiencies, the embodiment of the present invention proposes an interface detection method and device, by presetting the device ID, using the bus technology to read the type of the expansion device to load the corresponding driver and start the corresponding service and application, so that the terminal The interface status can be detected without interruption, and it can be applied to composite interface devices with complex functions, with strong scalability and wide application.

In order to facilitate the implementation of the present application, the interface detection method and device proposed in the present application will be described below in conjunction with specific embodiments.

Embodiment one,

FIG. 1 shows a schematic flow diagram of the implementation of the interface detection method in Embodiment 1 of the present invention. As shown in the figure, the interface detection method may include the following steps:

Step 101, detecting the interface pins of the terminal;

Step 102, if the interface pin used for insertion detection is at the first level, it is determined that an expansion device is inserted into the interface of the terminal; the interface chip of the expansion device is connected to the bus;

Step 103: Perform power-on initialization on the expansion device, and read the device information of the expansion device through the bus; the device information includes a device identification ID;

Step 104. Determine the device type of the extension device according to the device ID.

During specific implementation, if the expansion device is installed when the terminal is powered off, the embodiment of the present invention can detect the interface pins of the terminal after the terminal is powered on; if the expansion device is plug-and-play, then , the embodiment of the present invention can detect the interface pin of the terminal by interrupting.

There can be many interface pins of the terminal, which may include interface pins for insertion detection, for example: PLUG_DET_UP and PLUG_DET_Down, if the interface pins for insertion detection are at the first level during detection, the terminal can be determined There is an expansion device plugged into the interface. Wherein, the first level may be low level or high level. For example, when detecting the interface pins of the terminal, if both PLUG_DET_UP and PLUG_DET_Down are low level, it can be determined that an expansion device is inserted into the interface of the terminal.

After the expansion device is inserted into the interface of the terminal, the interface chip of the expansion device is connected to the bus, and the system of the terminal can read the device information of the expansion device through the bus. The bus (Bus) is the public communication trunk line for transmitting information between various functional components of the computer. The various components of the system in the embodiment of the present invention can be connected through the bus, and the external expansion equipment can be connected with the bus through the corresponding interface chip. One bus can A system in which multiple extension devices are connected, and each of these extension devices can transmit device information to the terminal.

The device information of the expansion device may include a device type. In the embodiment of the present invention, the device type of the expansion device can be obtained by reading the device information of the expansion device in the form of a bus. Among them, the device type is the classification of the device, a type of expansion device can have a variety of different devices, and the device ID is the ID that uniquely identifies the expansion device. During specific implementation, the device ID can be pre-written on the expansion device , the device type of the extension device can be determined through the device ID. For example: there can be many expansion devices of the type of power bank, and ID=A01 is a specific power bank device.

In the embodiment of the present invention, after the expansion device is inserted into the terminal, it is hung on the bus, and the terminal determines whether there is an expansion device inserted by detecting the interface pins, and the device type of the expansion device can be read through the bus after the expansion device is determined to be inserted. , the insertion and detection of various types of expansion devices can be realized through one interface; moreover, one interface of the terminal in the prior art can only be connected to one standard interface device, but because the embodiment of the present invention adopts the bus form, at the same time It can support the insertion of multiple expansion devices, and has strong scalability, which solves the problems in the prior art that the device type is detected by means of voltage level and only standard interface devices can be detected.

In implementation, the method may further include:

According to the device type of the expansion device, load the device driver and start the corresponding service program and application program;

Sending the program required for the expansion device to start to the expansion device;

After the expansion device starts, perform state synchronization with the expansion device.

During specific implementation, if it is determined that an expansion device is plugged into the interface of the terminal, the detection of the expansion device can be performed. Specifically, the expansion device can be powered on and initialized, and then the device information of the expansion device can be read through the bus. The device information may include a device type, and a corresponding driver is loaded according to the device type of the extended device, and corresponding services and applications are started.

During specific implementation, in any case, the CPU of the terminal needs to start programs such as related drivers and services, and some extension devices require the CPU of the terminal to send related programs to the extension device. The specific start-up process can be: initialize the interface bus, send related programs to the expansion device, the expansion device starts, and then the terminal HOST and the two ends of the expansion device are synchronized to enter the normal working mode. Wherein, the state synchronization at both ends may be to read the state of the extension device after the connection is established, the state of the extension device may include the state when the extension device was turned off last time, and the terminal may control the extension device to turn on/off.

The program required for starting the extension device sent to the extension device may be pre-stored by the terminal, or may be downloaded from the cloud by the terminal and then transmitted to the extension device.

The device type of the extension device can be a computer modem (commonly known as a modem), or an application device, and the application device can specifically be a power bank, a heart rate meter, a projector, and the like.

In the embodiment of the present invention, after determining the device type of the extension device, the driver can be loaded and corresponding services and applications can be started, and the state synchronization can be completed through the bus to realize the normal use of the extension device.

In implementation, the method may further include:

monitoring the working status of the expansion device;

The extension device is maintained according to the working state.

During specific implementation, after the normal work of initialization is completed, the working state of the expansion device may change dynamically, for example: busy → idle → suspend → standby → shutdown, etc., and abnormal situations may also occur.

The embodiment of the present invention can monitor the working state of the expansion device and maintain the state of the expansion device through the corresponding service program, for example: notify the terminal CPU when the expansion device is inserted normally or not, pop up a prompt message when the insertion is abnormal, or run Status update and maintenance are carried out during the process to ensure the normal use of the extended device.

In implementation, the bus may specifically be a serial bus I2C bus, and the interface chip of the expansion device is connected to the bus. Specifically, the I2C interface chip of the expansion device may be connected to the I2C bus.

During specific implementation, the bus can be an I2C bus or other buses. The I2C interface chip in the expansion device is hung on the I2C bus after the expansion device is inserted into the terminal interface. The interface chip of the expansion device can communicate with the I2C bus through the I2C bus. The system of the terminal establishes a connection, and the system of the terminal can read the device information of the extension device through the I2C bus.

The reading and writing of the I2C bus usually has a fixed format, and the general sequence can be: address (read/write)→register address→data, and this sequence can be used in the embodiment of the present invention to finally obtain the device information of the expansion device, specifically During implementation, the embodiment of the present invention may preset a group of addresses (for example, 2, 4 or 8) as the addresses of the expansion device.

In the implementation, the I2C bus and other methods are used because these methods are more commonly used and mainstream, and are easy to use/understand by those skilled in the art, so the I2C bus is used as an example here; however, in theory, it is also possible to use other methods, as long as It is enough to realize the purpose of connecting external expansion devices. The I2C bus is only used to teach those skilled in the art how to implement the present invention, but it does not mean that only the I2C bus can be used. During the implementation process, the corresponding method can be determined in combination with practical needs .

In implementation, the device information may further include: manufacturer information and/or device version.

During specific implementation, the device information may also include manufacturer information, device version and other information.

The existing technology can only detect the device type simply by detecting the voltage level, but cannot obtain information such as the specific version and manufacturer of the device. However, the embodiment of the present invention reads the device information of the expansion device through the bus. The device information may include information such as the specific version and manufacturer of the device, so that comprehensive information about the extended device can be obtained.

In implementation, the interface of the terminal may be a 68pin composite interface.

During specific implementation, the interface of the terminal in the embodiment of the present invention may be a composite interface, specifically a composite interface with 68 pins or other numbers of pins.

Since the embodiment of the present invention adopts a composite interface, the interface can support various types of expansion devices, while terminals in the prior art can only support devices with standard interfaces, and the embodiment of the present invention has stronger expandability.

Embodiment two,

The embodiment of the present invention is described with a specific example.

FIG. 2 shows a schematic diagram of the interface detection process in an embodiment of the present invention. As shown in the figure, the interface detection process may include the following steps:

Step 201, detecting interface pins Plug_DET_UP and Plug_DET_Down;

Step 202, judging whether the two pins are both low;

If yes, then perform step 203;

If not, then perform step 207;

Step 203, determine that the expansion device is plugged in;

Step 204, start extended device detection;

Step 205, obtain the device ID through I2C;

Step 206, report the extended device type, end;

Step 207, judging whether the two pins are both high;

If yes, then determine that no expansion device is plugged in, end;

If not, it will prompt the expansion device to plug in the connection problem, end.

In a specific implementation, the device type may be determined according to the device ID. For example, if the device ID of the extension device is A0123, then the device type of the extension device may be A.

The embodiment of the present invention can detect the plug-in detection pins Plug_DET_UP and Plug_DET_Down of the interface. If these two pins are both low level, it can be determined that the expansion device is plugged in, and then the device detection is performed, and the device ID is obtained through the I2C bus and reported. Device type and other operations; if both pins are high level, it means that no expansion device is plugged in; if one pin is high level and the other pin is low level, it means that there is a problem with the insertion of the expansion device or the connection is abnormal. Prompt the user to insert the connection problem, and perform the detection operation again after the user reinserts.

Embodiment three,

Based on the same inventive concept, an interface detection device is also provided in the embodiment of the present invention. Since the problem-solving principle of these devices is similar to an interface detection method, the implementation of these devices can refer to the implementation of the method, and the repetition is no longer repeat.

Fig. 3 shows a first schematic structural diagram of an interface detection device in an embodiment of the present invention. As shown in the figure, the interface detection device may include:

A detection module 301, configured to detect interface pins of the terminal;

The first determination module 302 is configured to determine that an expansion device is inserted into the interface of the terminal if the interface pin used for insertion detection is at the first level;

A hooking module 303, configured to hang the interface chip of the expansion device on the bus;

The reading module 304 is configured to perform power-on initialization on the expansion device, and read the device information of the expansion device through the bus; the device information includes a device identification ID;

The second determining module 305 is configured to determine the device type of the extension device according to the device ID.

During specific implementation, the detection module may detect the interface pins of the terminal after the terminal is powered on, or detect the interface pins of the terminal regularly or irregularly by way of interruption.

The first level may be a low level or a high level, and the first determination module may be specifically configured to determine that an extension device is inserted into the interface of the terminal if the interface pin used for insertion detection is a low level; There may be many interface pins, which may include interface pins for insertion detection, for example: PLUG_DET_UP and PLUG_DET_Down, and the first determination module may specifically be used to determine if the PLUG_DET_UP and PLUG_DET_Down pins are both low The interface of the terminal has expansion equipment plugged in.

Specifically, the hook-up module can be used to hang the interface chip of the expansion device on the bus after the expansion device is inserted into the interface of the terminal. Multiple expansion devices can be connected to one bus, and the hook-up module can be used to connect the interfaces of multiple expansion devices The chips are respectively hung on the bus, and these expansion devices can directly transmit data with the terminal system.

In the embodiment of the present invention, after the expansion device is inserted into the terminal interface, the hook-up module will hang the expansion device on the bus, and the detection module can determine whether there is an expansion device inserted by detecting the pins of the terminal interface. After the device is inserted, the device type of the expansion device can be read through the bus, and the embodiment of the present invention can realize the insertion and detection of various types of expansion devices through one interface; and, one interface of the terminal in the prior art can only connect A standard interface device, and because the embodiment of the present invention adopts the bus form, it can support the insertion of multiple expansion devices at the same time, and the scalability is strong. Can detect standard interface equipment and other problems.

Fig. 4 shows a schematic structural diagram II of an interface detection device in an embodiment of the present invention. As shown in the figure, the device may further include:

A startup module 306, configured to load a device driver and start a corresponding service program and application program according to the device type of the extension device;

A sending module 307, configured to send to the extension device the program required for the extension device to start;

The synchronization module 308 is configured to perform state synchronization with the expansion device after the expansion device is started.

During specific implementation, the sending module can specifically be used to send the pre-stored program required for starting the expansion device to the expansion device, and can also be used to download the program required for starting the expansion device from the cloud and send it to the After the download is successful, the program required for starting the expansion device is sent to the expansion device.

In the embodiment of the present invention, after the device type of the expansion device is determined, the startup module loads the driver and starts the corresponding service and application, and after the sending module sends the program required for starting the expansion device to the expansion device, the synchronization module The status synchronization can be completed through the bus to realize the normal use of the expansion device.

Fig. 5 shows a schematic structural diagram III of an interface detection device in an embodiment of the present invention. As shown in the figure, the device may further include:

A monitoring module 309, configured to monitor the working state of the expansion device;

A maintenance module 310, configured to maintain the expansion device according to the working state.

During specific implementation, the monitoring module can specifically be used to monitor the working state of the expansion device, and the working state of the expansion device can specifically include busy busy, idle idle, suspend, sleep standby, shutdown, etc., and Unusual conditions may occur.

In the embodiment of the present invention, the monitoring module can monitor the working state of the expansion device through the corresponding service program. The maintenance module is used to maintain the state of the expansion device, for example: when the expansion device is inserted normally or not inserted, the terminal CPU is notified; Pop up prompt information, or perform status update and maintenance during operation to ensure the normal use of the extended device.

In implementation, the bus may specifically be a serial bus I2C bus, and the hook-up module may specifically be used to hang the I2C interface chip of the expansion device onto the I2C bus.

During specific implementation, the bus can be an I2C bus or other buses, and the hook-up module can hang the I2C interface chip in the expansion device on the I2C bus after the expansion device is inserted into the interface of the terminal, and the interface chip of the expansion device can pass through The I2C bus establishes a connection with the terminal system, and the reading module can read the device information of the expansion device through the I2C bus.

In implementation, the device information read by the reading module may also include: manufacturer information and/or device version.

During specific implementation, the device information may also include manufacturer information, device version and other information. The reading module can be specifically used to read information such as manufacturer information, device version, and device ID of the expansion device.

In implementation, the interface of the terminal may be a 68pin composite interface.

During specific implementation, the interface of the terminal in the embodiment of the present invention may be a composite interface, specifically a composite interface with 68 pins or other numbers of pins.

Since the embodiment of the present invention adopts a composite interface, the interface can support various types of expansion devices, while terminals in the prior art can only support devices with standard interfaces, and the embodiment of the present invention has stronger expandability.

For the convenience of description, each part of the device described above is divided into various modules or units by function and described separately. Of course, when implementing the present invention, the functions of each module or unit can be implemented in one or more pieces of software or hardware.

Embodiment four,

FIG. 6 shows a schematic structural diagram of a mobile phone inserted into an extension device in an embodiment of the present invention. As shown in the figure, the embodiment of the present invention takes a mobile phone as a terminal as an example for the following description.

The mobile phone in the embodiment of the present invention is provided with an expansion interface for inserting an expansion device. During specific implementation, the expansion interface on the mobile phone can be a male port and/or a female port, and the expansion device to be inserted can include both a male port and a female port, and the male port and the female port of the expansion device can be respectively placed on the outside of the two opposite sides of the expansion device.

Assume that the expansion interface on the mobile phone is a male port, and the expansion device is a music player and a projector. A female port is provided on the outside of one plane of the music player, and a male port is provided on the outside of the other opposite surface. A female port is provided on the outside of one plane, and a male port is provided on the outside of the other opposite surface.

The female port of the music player is docked with the male port of the mobile phone, and the female port of the projector is connected with the male port of the music player, so that two external expansion devices can be superimposed on the back of the mobile phone. After the external expansion devices are inserted into the mobile phone, all external expansion devices can be directly connected to the bus in the form of a bus in the embodiment of the present invention, and can directly transmit data with the mobile phone respectively.

The mobile phone can detect the male pins of the mobile phone. If the PLUG_DET_UP and PLUG_DET_Down of the male pins of the mobile phone are both low, it means that there is an expansion device plugged into the expansion interface of the mobile phone; then the mobile phone can send to the corresponding address of the bus to obtain device information The music player responds to the request, and the response message can carry information such as its own device ID (assumed to be YYBFQ01), device version number and manufacturer, and the mobile phone obtains the device ID of the extended device After that, it can be determined that the extended device is a music player.

The mobile phone can also continue to detect the public port of the music player, if the PLUG_DET_UP and PLUG_DET_Down of the public port pins of the music player are both low level, it means that the expansion interface of the music player has an expansion device inserted; Then the mobile phone can send a request to obtain device information to the corresponding address of the bus, and the projector responds to the request, and the response message can carry information such as its own device ID (assumed to be TYY01), device version number and manufacturer, so After the mobile phone obtains the device ID of the extension device, it can determine that the extension device is a projector.

In the embodiment of the present invention, after determining that the extended devices are respectively a music player and a projector, device drivers can be respectively loaded for the music player and the projector and corresponding service programs and application programs can be started:

After loading the music player driver and starting the corresponding service program and application program of the music player, send the program required for starting the music player to the music player. After the music player is successfully started, the mobile phone and the music player are in a complete state Synchronize;

After loading the projector driver and starting the corresponding service program and application program of the projector, the program required for starting the projector is sent to the projector. After the projector is successfully started, the mobile phone and the projector complete state synchronization.

At this point, the mobile phone and the external extension equipment music player and projector can enter the normal working mode, and the user can realize the purpose of playing the slide show while turning on the mp3 through the mobile phone.

Embodiment five,

The following embodiments of the present invention will be described by taking an intelligent robot as a terminal as an example.

The intelligent robot in the embodiment of the present invention is provided with an expansion interface for inserting an expansion device, and the expansion device may specifically be a power bank or the like.

During specific implementation, the expansion interface on the intelligent robot can be a male port, and the interface on the charging treasure can be a female port; or, the expansion interface on the intelligent robot can be a female port, and the The interface can be a male port; or, the expansion interface on the intelligent robot includes both a male port and a female port, and the interface on the power bank is a male port or a female port, or both.

After the interface of the charging treasure is connected with the expansion interface of the intelligent robot, the charging treasure is directly connected to the I2C bus, and can directly transmit data with the intelligent robot.

The intelligent robot can detect the pins of the expansion interface of the intelligent robot. If the PLUG_DET_UP and PLUG_DET_Down of the pins of the expansion interface of the intelligent robot are both low level, it means that the expansion interface of the intelligent robot has an expansion device inserted; The intelligent robot can send a request to obtain device information to the corresponding address of the bus, and the power bank responds to the request, and the response message can carry information such as its own device ID (assumed to be CDB092), device version number, and manufacturer. After the intelligent robot acquires the device ID of the extension device, it can determine that the extension device is a power bank (abbreviated as CDB).

In the embodiment of the present invention, after the extended device is determined to be a power bank, the intelligent robot can download the power bank driver from the cloud, the service programs and application programs required for power bank startup, and then load the power bank driver and start the power bank for the power bank. The corresponding service program and application program send the program required for starting the power bank to the power bank. After the power bank is successfully started, the intelligent robot reads the state of the power bank and completes state synchronization.

At this point, the intelligent robot and the power bank can enter the normal working mode. While the intelligent robot is executing user instructions, the power bank can charge the intelligent robot to ensure the normal use of the intelligent robot.

Embodiment six,

FIG. 7 shows a schematic structural diagram of a pad plug-in expansion device in an embodiment of the present invention. As shown in the figure, the embodiment of the present invention will be described below taking a tablet computer (pad) as a terminal as an example.

The pad in the embodiment of the present invention is provided with an expansion interface, which can be used to insert an expansion device, and the expansion device can specifically be a tablet keyboard, a conference call speaker, a printer, and the like.

During specific implementation, the expansion interface on the pad may be a male port or a female port, and the interface on the expansion device may include both a male port and a female port.

Assuming that the expansion interface on the pad is a male port, when the female port of the tablet keyboard is plugged into the male port of the pad, the interface chip of the tablet keyboard is hung on the I2C bus, which can be directly connected to the system of the pad. transmit information.

The pad can detect the pins of the expansion interface. If the PLUG_DET_UP and PLUG_DET_Down of the pins of the expansion interface of the pad are both low, it means that the expansion interface of the pad has an expansion device inserted; The corresponding address sends a request to obtain device information, the tablet keyboard responds to the request, and the response message can carry information such as its own device ID (assumed to be PBJP008), device version number and manufacturer, and the pad obtains the After the device ID of the extension device, it can be determined that the extension device is a tablet keyboard (abbreviated as PBJP).

The pad can pre-store the service programs and application programs required for starting the tablet keyboard in the pad storage space. In the embodiment of the present invention, after the expansion device is determined to be a tablet keyboard, the pad can load the keyboard driver for the tablet keyboard. And start the corresponding service program and application program, send the program needed for the keyboard to start to the tablet keyboard, after the tablet keyboard is successfully started, the pad reads the state of the tablet keyboard, and completes the state synchronization.

At this point, the pad and the tablet keyboard can enter the normal working mode, and the user can perform input operations through the tablet keyboard while using the pad.

When the user needs to conduct a conference call, in order to allow other people next to him to participate and hear the content of the conference clearly, the user can insert a conference call speaker (corresponding to the female port of the conference call speaker) into the male port of the tablet keyboard. The interface chip of the conference call speaker is also hung on the I2C bus, which can directly transmit information with the pad system.

Since the male port of the pad is plugged into the female port of the tablet keyboard, the male port of the tablet keyboard is equivalent to the male port of the pad to realize extended functions. The pad can detect the pins of the male port of the tablet keyboard. If the PLUG_DET_UP and PLUG_DET_Down of the male pins are both low, it means that an expansion device is inserted; then the pad can send the corresponding address to the bus. Send a request to obtain device information, the conference call speaker responds to the request, and the response message can carry information such as its own device ID (assumed to be DHHYYSQ011), device version number and manufacturer, and the pad obtains the extended After the device ID of the device is obtained, it can be determined that the extension device is a conference call speaker (abbreviated as DHHYYSQ).

The pad can pre-store the service programs and application programs required for starting the conference call speaker in the pad storage space. In the embodiment of the present invention, after the extension device is determined to be the conference call speaker, the pad can be the conference call speaker Load the speaker driver and start the corresponding service program and application program, send the program required for the speaker to start to the speaker of the conference call, after the speaker of the conference call is successfully started, the pad reads the state of the speaker of the conference call, Complete state synchronization.

So far, the pad and the conference call speaker can enter the normal working mode, and the user can increase the volume of the conference call through the conference call speaker while using the pad.

When the user needs to print documents for everyone to read during the meeting, a printer (corresponding to the female port of the printer) can be plugged into the male port of the conference call speaker, and the interface chip of the printer is also hung on the I2C bus, which can communicate with the The pad's system transmits information directly.

Since the male port of the pad is plugged into the female port of the tablet keyboard, and the male port of the tablet keyboard is plugged into the female port of the conference call speaker, the male port of the conference call speaker is equivalent to the male port of the pad , to achieve extended functionality. The pad can detect the pins of the public port of the conference call speaker. If the PLUG_DET_UP and PLUG_DET_Down of the public port pins are both low, it means that an expansion device is inserted; The address sends a request to obtain device information, the printer responds to the request, and the response message can carry information such as its own device ID (assumed to be DYJ080), device version number, and manufacturer, and the pad obtains the extension device After the device ID of the device, it can be determined that the extended device is a printer (abbreviated as DYJ).

In the embodiment of the present invention, after the extended device is determined to be a printer, the pad can download the service program and application program required for starting the printer from the network, and the pad can load the printer driver for the printer and start the corresponding service program and application program. The program sends the program required for starting the printer to the printer, and after the printer is successfully started, the pad reads the status of the printer to complete the status synchronization.

So far, the pad and the printer can enter the normal working mode, and the user can realize the document printing function through the printer while using the pad.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Claims (12)

1. a kind of interface detection method, it is characterised in that comprise the following steps：

Detect the interface pin of terminal；

If being the first level for the interface pin for inserting detection, determining the interface of terminal has expansion equipment insertion；It is described to expand The interface chip of exhibition equipment is suspended in bus；

Power-up initializing is carried out to the expansion equipment, the facility information of the expansion equipment is read by bus；The equipment Information includes device identification ID；

The device type of the expansion equipment is determined according to the device id.

2. the method as described in claim 1, it is characterised in that further comprise：

According to the device type of the expansion equipment, loading equipemtn drives and starts corresponding service routine and application program；

The program required for the expansion equipment starts is sent to the expansion equipment；

After after expansion equipment startup, state synchronized is performed with the expansion equipment.

3. method as claimed in claim 2, it is characterised in that further comprise：

Monitor the working condition of the expansion equipment；

The expansion equipment is safeguarded according to the working condition.

4. the method as described in claim 1, it is characterised in that the bus is specially universal serial bus I2C buses, the extension The I2C interface chips that the interface chip of equipment is suspended to the specially expansion equipment in bus are suspended in I2C buses.

5. the method as described in claim 1, it is characterised in that the facility information also includes manufacturer's information and/or equipment Version.

6. the method as described in claim 1, it is characterised in that the interface of the terminal is 68pin compound interface.

7. a kind of interface detection apparatus, it is characterised in that including：

Detection module, the interface pin for detecting terminal；

First determining module, if being the first level for the interface pin for inserting detection, determining the interface of terminal has expansion Open up equipment insertion；

Knock-down module, for the interface chip of the expansion equipment to be suspended into bus；

Read module, for carrying out power-up initializing, the equipment that the expansion equipment is read by bus to the expansion equipment Information；The facility information includes device identification ID；

Second determining module, the device type for determining the expansion equipment according to the device id.

8. device as claimed in claim 7, it is characterised in that further comprise：

Starting module, for the device type according to the expansion equipment, loading equipemtn drives and starts corresponding service routine And application program；

Sending module, for sending the program required for the expansion equipment starts to the expansion equipment；

Synchronization module, for after after expansion equipment startup, state synchronized to be performed with the expansion equipment.

9. device as claimed in claim 8, it is characterised in that further comprise：

Monitoring modular, the working condition for monitoring the expansion equipment；

Maintenance module, for being safeguarded according to the working condition to the expansion equipment.

10. device as claimed in claim 7, it is characterised in that the bus is specially universal serial bus I2C buses, the extension Connection module is specifically for the I2C interface chips of the expansion equipment are suspended in I2C buses.

11. device as claimed in claim 7, it is characterised in that the facility information also includes manufacturer's information and/or equipment Version.

12. device as claimed in claim 7, it is characterised in that the interface of the terminal is 68pin compound interface.