CN111124957B - USB channel switching device - Google Patents

USB channel switching device Download PDF

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Publication number
CN111124957B
CN111124957B CN201911409855.9A CN201911409855A CN111124957B CN 111124957 B CN111124957 B CN 111124957B CN 201911409855 A CN201911409855 A CN 201911409855A CN 111124957 B CN111124957 B CN 111124957B
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channel
switch module
usb
signal processing
module
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CN111124957A (en
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陈建建
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Tongcai Audio Visual Technology Shanghai Co ltd
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Tongcai Audio Visual Technology Shanghai Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/10—Program control for peripheral devices
    • G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]

Abstract

The invention relates to the technical field of control circuits, and provides a USB channel switching device which is applied to a multimedia all-in-one machine provided with a mobile terminal operating system and a PC terminal operating system, and comprises: the mobile terminal comprises a mobile terminal signal processing module, a PC terminal signal processing module touch screen frame, a USB interface, a first switch module, a PC terminal signal processing module and a second switch module unit, wherein the USB interface, the first switch module, the PC terminal signal processing module and the second switch module unit are sequentially connected, the touch screen frame is respectively connected with the PC terminal signal processing module and the mobile terminal signal processing module, the first switch module is connected with the mobile terminal signal processing module, and the mobile terminal signal processing module, the first switch module and the second switch module unit are respectively connected with an external microprocessor module. Through the implementation of the invention, when the multimedia all-in-one machine switches the operating system, the multimedia all-in-one machine can switch the USB channel in the multimedia all-in-one machine according to the running state of the mainboard, thereby solving the problem of low switching efficiency of the USB equipment switching method in the prior art.

Description

USB channel switching device
Technical Field
The invention relates to the technical field of control circuits, in particular to a USB channel switching device.
Background
With the rapid development of electronic information technology, an all-in-one machine capable of integrating a smart phone, a computer and the like into a whole appears. The existing all-in-one machine can run different operating systems in a time-sharing mode, and the corresponding operating system can be selected according to the will of a user to achieve the purpose of one machine with multiple purposes. The integrated machine is usually provided with a USB interface, when the USB interface is connected with USB equipment and a user changes an operating system of the integrated machine, the USB interface needs to be repeatedly plugged into the corresponding USB interface, so that the integrated machine running the current operating system can identify the USB equipment, the operation of the process is complex, and the USB interface and the USB equipment are easily damaged.
In order to solve the technical problem, in the prior art, generally, display content and touch screen data of the all-in-one machine are obtained first, then a current operating system of the all-in-one machine is judged according to the display content and the touch screen data, and then a corresponding USB channel is selected, so that the all-in-one machine can identify the USB device.
Although the reading method in the prior art can identify the corresponding USB device, the display content and the touch screen data of the all-in-one machine need to be obtained in advance, and then the USB device is identified, which causes a long delay and is not beneficial to quickly reading the USB device. In summary, the USB device switching method in the prior art has a problem of low switching efficiency.
Disclosure of Invention
The embodiment of the application provides a USB channel switching device, which is used for solving the problem of low reading efficiency of a USB device reading method in the prior art.
The present application is achieved as such, a USB channel switching apparatus, comprising: the mobile terminal comprises a USB interface, a first switch module, a second switch module, a PC terminal signal processing module, a mobile terminal signal processing module and a touch screen frame, wherein the USB interface, the first switch module, the PC terminal signal processing module and the second switch module are sequentially connected, the touch screen frame is connected with the PC terminal signal processing module, the first switch module is connected with the mobile terminal signal processing module, and the mobile terminal signal processing module, the first switch module and the second switch module are respectively connected with an external microprocessor module;
the USB interface is used for being connected with external USB equipment, the external microprocessor module sends a first switching signal to the first switch module and sends a second switching signal to the second switch module according to the running state of the current mainboard, the first switch module is used for selecting a corresponding channel in the multimedia all-in-one machine according to the first switching signal, and the second switch module is used for selecting a corresponding channel in the PC channel according to the second switching signal.
The application provides a USB channel switching device, through adopting the USB channel switching device who includes USB interface, first switch module, second switch module, PC end signal processing module, removal end signal processing module and touch-screen frame, when being applied to the multimedia all-in-one of installing different operating systems with this USB channel switching device, the multimedia all-in-one can switch the USB passageway in the multimedia all-in-one according to the running state of mainboard, has solved the USB equipment switching method among the prior art and has had the lower problem of switching efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a block diagram of a USB channel switching device according to an embodiment of the present disclosure;
FIG. 2 is a schematic block diagram of a USB channel switching apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of a USB channel switching device according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a USB channel switching device according to an embodiment of the present disclosure.
The reference numbers of the specification are as follows:
11. a USB interface; 12. a first switch module; 13. a mobile terminal signal processing module; 14. a PC end signal processing module; 15. a second switch module; 16. a touch screen frame; 2. a USB device; 3. a main board; 4. a microprocessor module; 5. a front channel device; 6. a channel device is arranged inside; 7. a post-channel device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly and completely apparent, the technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.
As shown in fig. 1, the USB channel switching device provided in the embodiment of the present invention is applied to a multimedia all-in-one machine installed with a mobile terminal operating system and a PC terminal operating system, and includes: the device comprises a USB interface 11, a first switch module 12, a second switch module 15, a PC end signal processing module 14, a mobile end signal processing module 13 and a touch screen frame 16.
Specifically, the USB interface 11, the first switch module 12, the PC end signal processing module 14, and the second switch module 15 are sequentially connected, the touch screen frame 16 is respectively connected to the PC end signal processing module 14 and the mobile end signal processing module 13, the first switch module 12 is connected to the mobile end signal processing module 13, and the mobile end signal processing module 13, the first switch module 12, and the second switch module 15 are respectively connected to the external microprocessor module 4; the USB interface 11 is used for being connected with an external USB device 2, the external microprocessor module 4 sends a first switching signal to the first switch module 12 and sends a second switching signal to the second switch module 15 according to the current running state of the mainboard 3, the first switch module 12 is used for selecting a corresponding channel in the multimedia all-in-one machine according to the first switching signal, and the second switch module 15 is used for selecting a corresponding channel in the PC channel according to the second switching signal.
The multimedia all-in-one machine comprises any intelligent terminal equipment which is provided with a mobile terminal operating system and a PC terminal operating system at the same time. In addition, the mobile terminal operating system installed in the multimedia all-in-one machine may be an Android operating system, an IOS operating system, a Symbian operating system, a Black Berry operating system, a Windows Phone 8 operating system, or the like; the PC-side operating system installed in the multimedia all-in-one machine may be a Windows operating system, a Mac OS operating system, a Linux operating system, a UNIX operating system, etc., and is not limited herein.
The USB interface 11 may be connected to an external USB device 2. In addition, the USB interface may be a USB TYPE-A, USB TYPE-B, USB TYPE-C, a proprietary USB, or the like, and the TYPE of the USB interface 11 is not particularly limited herein.
It should be noted that, in the present application, "external USB device" and "external microprocessor module" described in this embodiment are "external" with respect to the USB channel switching device, and are not "external" of the multimedia kiosk to which the USB channel switching device is applied.
The running state of the motherboard 3 may be specifically a state of running the mobile terminal operating system, a connection state of the second switch module 15 and an external device, or a state of running the PC terminal operating system. In addition, the microprocessor module 4 may be a micro control Unit (MCU for short) capable of outputting the first switching signal and the second switching signal according to the operation state of the motherboard 3.
The first switch module 12, the second switch module 15, the PC-side signal processing module 14, and the mobile-side signal processing module 13 may be respectively formed by corresponding chips, and the first switch module 12, the second switch module 15, the PC-side signal processing module 14, and the mobile-side signal processing module 13 may output corresponding signals according to input signals.
The touch screen frame 16 can acquire touch screen data formed on the touch screen, and specifically, when the first switch module 12 is switched to the mobile terminal channel, the touch screen data acquired by the touch screen frame 16 is sent to the external microprocessor module 4 through the mobile terminal signal processing module 13 for reading; when the first switch module 12 is switched to the PC channel, the touch screen data obtained by the touch screen frame 16 is sequentially sent to the external micro-processing module 4 of the external micro-processor module 4 via the PC signal processing module 14 and the second switch module 12. That is to say, when the multimedia all-in-one machine to which the USB channel switching device is applied runs the mobile terminal operating system or the PC terminal operating system, the touch screen data acquired by the touch screen frame 16 is read, so as to form a corresponding operation reaction in the multimedia all-in-one machine. Specifically, when the external USB device 2 is connected to the USB interface 11, the external microprocessor module 4 sends a first switching signal to the first switch module 12 according to the current operating state of the motherboard 3, and when the motherboard 3 runs the mobile terminal operating system, the first switch module 12 selects a mobile terminal channel corresponding to the mobile terminal operating system according to the first switching signal; when the motherboard 3 runs the PC side operating system, the first switch module 12 selects a PC side channel corresponding to the PC side operating system according to the first switching signal, and at the same time, the external microprocessor module 4 sends a second switching signal to the second switch module 15 according to the running state of the motherboard 3, and the second switch module 15 selects a channel corresponding to the second switching signal in the PC channel according to the second switching signal.
In this embodiment, by using the USB channel switching device including the USB interface 11, the first switch module 12, the second switch module 15, the PC signal processing module 14, the mobile terminal signal processing module 13, and the touch screen frame 16, when the multimedia all-in-one machine switches the operating system, the multimedia all-in-one machine can switch the USB channel in the multimedia all-in-one machine according to the running state of the motherboard 3, and the switching of the USB channel is started without displaying the corresponding operating system on the multimedia all-in-one machine, which solves the problem that the switching efficiency of the switching method of the USB device 2 in the prior art is low.
Further, as an embodiment of the present embodiment, as shown in fig. 2, the second switch module 15 may be further connected to the front channel device 5, the built-in channel device 6, and the back channel device 7, and the second switch module 15 may control a connection state between the second switch module 15 and any one of the front channel device 5, the built-in channel device 6, and the back channel device 7 according to the second switching signal.
In this embodiment, the front channel device 5, the built-in channel device 6, and the back channel device 7 may all be external expansion devices of the multimedia all-in-one machine, and the multimedia all-in-one machine can read and identify data in the front channel device 5, the built-in channel device 6, and the back channel device 7.
It should be noted that, in this embodiment, the mobile terminal operating system and the PC terminal operating system are run corresponding to the multimedia all-in-one machine, and two circuits are formed through the switching of the first switch module 12, one is a channel circuit of the mobile terminal operating system, and the other is a channel circuit of the PC terminal operating system.
Further, as an implementation manner of the embodiment, the first switch module 12 includes a first function pin connected to the microprocessor module 4, the first function pin is configured to receive a first switching signal, and the first switch switching module selects one of the PC port channel and the mobile port channel according to the first switching signal.
Specifically, the first functional pin may receive a high-low level signal, and the high-low level signal received by the first functional pin is used as the first switching signal. The switch chip in the first switch module 12 may be a chip with model number SGM 7227U 17, taking the exemplary circuit structure shown in fig. 3 and 4 as an example, the first functional pin is TP _ SEL 2. When the pin TP _ SEL2 receives a high level, the first switch module 12 controls the first switch module 12 to connect with the mobile terminal signal processing module 13; when the pin TP _ SEL2 receives a low level, the first switch module 12 controls the first switch module 12 to connect to the PC signal processing module 14.
In the present embodiment, by providing the first function pin in the first switch module 12 in the USB channel switching device, a channel circuit of a mobile side operating system or a channel circuit of a PC side operating system can be formed.
Further, as an implementation manner of this embodiment, as shown in fig. 4, the first switch module 12 further includes a second function pin, the PC-side signal processing module 14 includes a third function pin, and the second function pin and the third function pin are connected in a one-to-one correspondence manner.
Specifically, the first switch module 12 controls a conduction state between the second function pin and the third function pin according to the received first switching signal. The signal processing chip in the PC-side signal processing module 14 may be a chip with a model number of U13, taking the exemplary circuit structure shown in fig. 4 as an example, the second functional pin is a pin PUB _ USB + and a pin PUB _ USB +, and the third functional pin is a pin PUB _ MIX _ USB + and a pin PUB _ MIX _ USB-. When the pin TP _ SEL2 receives a low level, the first switch module 12 controls the connection of the pin PUB _ USB + and the pin PUB _ MIX _ USB +, and the first switch module 12 controls the connection of the pin PUB _ USB-and the pin PUB _ MIX _ USB-to form a channel circuit of the PC side operating system.
In this embodiment, by providing the second function pin in the first switch module 12 and the third function pin in the PC-side signal processing module 14, the first switch module 12 can form a channel circuit of the PC-side operating system according to the USB channel switching device when receiving the first switching signal for connecting the PC-side channel.
Further, as an implementation manner of this embodiment, as shown in fig. 3, the mobile terminal signal processing module 13 includes a twelfth function pin, and the twelfth function pin is connected to the second function pin in a one-to-one correspondence manner.
Specifically, the first switch module 12 controls a conduction state between the second function pin and the twelfth function pin according to the received first switching signal. The signal processing chip in the mobile terminal signal processing module 13 may be a chip with a model number of U66, taking the exemplary circuit structure shown in fig. 3 as an example, the second functional pins are pin PUB _ USB + and pin PUB _ USB ", and the twelfth functional pin is pin PUB _ AD + and pin PUB _ AD-. When the pin TP _ SEL2 receives a high level, the first switch module 12 controls the pin PUB _ USB + to connect with the pin PUB _ AD +, and the first switch module 12 controls the pin PUB _ USB-to connect with the pin PUB _ AD +, so as to form a channel circuit of the mobile terminal operating system.
In this embodiment, by providing the twelfth function pin in the mobile terminal signal processing module 13, when the first switch module 12 receives the first switching signal connected to the mobile terminal channel, the channel circuit of the mobile terminal operating system can be formed according to the USB channel switching device.
Further, as an implementation manner of this embodiment, as shown in fig. 4, the PC-side signal processing module 14 further includes a fourth function pin, the second switch module 15 includes a fifth function pin, the fourth function pin and the fifth function pin are connected in a one-to-one correspondence, and the PC-side signal processing module 14 is configured to control a conduction state between the fourth function pin and the fifth function pin.
Specifically, the model of the switch chip in the second switch module 15 may be a FSUSB U15 chip, and as shown in the exemplary circuit diagram of fig. 4, the fourth functional pin may be pin HOST _ USB + and pin HOST _ USB-, and the fifth functional pin may be pin HOST _ USB + and pin HOST _ USB-in the FSUSB U15 chip, pin HOST _ USB + being connected to pin HOST _ USB +, pin HOST _ USB-and pin HOST _ USB-being connected.
In the present embodiment, by providing the fourth function pin in the PC-side processing module 14 and providing the fifth function pin in the second switch module 15, the PC-side processing module 14 and the second switch module 15 can be connected to form a channel circuit of the PC-side operating system.
Further, as an implementation manner of this embodiment, as shown in fig. 4, the PC-side signal processing module 14 further includes a sixth function pin for connecting with the touch screen frame 16, and the PC-side signal processing module 14 is configured to control a conduction state between the sixth function pin and the touch screen frame 16.
Specifically, the signal processing chip in the PC-side signal processing module may be a chip with a model number of U13, at this time, the sixth functional pin is pin _ PC +, the PC-side signal processing module 14 can control the connection state between pin _ PC +, pin _ PC-and the TOUCH screen frame 16, and the TOUCH screen frame 16 can obtain a TOUCH screen signal formed on the multimedia all-in-one machine.
In this embodiment, the sixth function pin is disposed in the PC-side signal processing module 14, so that the microprocessor module 4 can obtain a touch screen signal formed in the multimedia all-in-one machine.
Further, as an implementation manner of the present embodiment, the mobile terminal signal processing module 13 further includes a ninth function pin for connecting with the micro processing module 4.
Specifically, the signal processing chip in the mobile terminal signal processing module 13 may be a chip of type U66, taking the exemplary circuit structure shown in fig. 4 as an example, at this time, the ninth functional pin is a pin USB3_ D + and a pin USB3_ D-, and the pin USB3_ D + and the pin USB3_ D-are respectively connected to the external micro processing module 4, so that the external micro processing module 4 can read data in the external USB device 2, and a defect that a native USB channel of the external micro processing module 4 cannot meet peripheral requirements can be overcome.
In this embodiment, by setting the ninth functional pin in the mobile terminal signal processing module 13, the external microprocessor module 4 can read data in the external USB device 2, and the mobile terminal signal processing module 13 is configured to make up for a defect that a native USB channel of the external microprocessor module 4 cannot meet a peripheral requirement.
Further, as an implementation manner of this embodiment, the second switch module 15 further includes a seventh function pin, the PC-side signal processing module 14 includes an eighth function pin, and the seventh function pin and the eighth function pin are connected in a one-to-one correspondence.
Specifically, the switch chip in the second switch module 15 may be a chip of model U15, the signal processing chip in the PC-side signal processing module 14 may be a chip of model U13, and as shown in fig. 4, the seventh functional pin may be a pin HOST _ USB + and a pin HOST _ USB + in the chip U13, and the eighth functional pin may be a pin HOST _ USB + and a pin HOST _ USB-in the chip U15. Pin HOST _ USB + in chip U13 connects to pin HOST _ USB + in chip U15, pin HOST _ USB-in chip U13 and pin HOST _ USB-in chip U15.
In this embodiment, by providing the seventh functional pin in the second switch module 15 and the eighth functional pin in the PC-side signal processing module 14, the second switch module 15 and the PC-side signal processing module 14 can be connected to implement a channel circuit of the PC-side operating system.
Further, as an implementation manner of this embodiment, as shown in fig. 3, when the mobile system is run on the motherboard 3 and the USB interface 11 is externally connected to the USB device 2, the microprocessor module 4, the mobile signal processing module 13, the first switch module 12, the USB interface 11, and the USB device 2 form a channel circuit of the mobile operating system. At this time, the first switch module 12 is switched to the channel circuit of the mobile terminal operating system, and the first switch module 12 controls the first switch module 12 to be connected to the mobile terminal signal processing module 13.
As shown in fig. 4, when the PC end system is run on the motherboard 3 and the USB interface 11 is externally connected to the USB device 2, the microprocessor module 4, the second switch module 15, the PC end signal processing module 14, the touch screen frame 16, the first switch module 12, the USB interface 11, and the USB device 2 form a channel circuit of the PC end operating system. At this time, the first switch module 12 is switched to a channel circuit of the PC-side operating system, and the first switch module 12 controls the first switch module 12 to be connected with the PC-side signal processing module 14.
Specifically, when the microprocessor module 4, the second switch module 15, the PC-side signal processing module 14, the touch screen frame 16, the first switch module 12, the USB interface 11, and the USB device 2 form a channel circuit of the PC-side operating system, the external microprocessor module 4 can input the second switching signal to the second switch module 15 to select the second switch module 15 to be connected to any one of the front channel, the built-in channel, and the back channel, so as to be connected to the corresponding front channel device 5, the built-in channel device 6, or the back channel device 7. In this embodiment, the corresponding channel in the PC side channel may include at least one of a front channel, a built-in channel, and a back channel.
When the second switch module 15 is connected with the front channel device 5, the USB device 2, the USB interface 11, the first switch module 12, the touch screen frame 16, the PC end signal processing module 14, the microprocessor module 4, the second switch module 15, and the front channel device 5 form a front channel circuit of a PC end operating system; when the second switch module 15 is connected with the built-in channel device 6, the USB device 2, the USB interface 11, the first switch module 12, the touch screen frame 16, the PC-side signal processing module 14, the microprocessor module 4, the second switch module 15, and the built-in channel device 6 form a built-in channel circuit of the PC-side operating system; when the second switch module 15 is connected to the back channel device 5, the USB device 2, the USB interface 11, the first switch module 12, the touch screen frame 16, the PC signal processing module 14, the microprocessor module 4, the second switch module 15, and the back channel device 7 form a back channel circuit of the PC operating system.
In this embodiment, by switching the states of the first switch module 12 and the second switch module 15, any one of the channel circuit of the mobile terminal operating system, the front channel circuit of the PC terminal operating system, the built-in channel circuit of the PC terminal operating system, and the back channel circuit of the PC terminal operating system can be selected to operate, and different external devices are connected according to user requirements, so as to expand the functions of the multimedia all-in-one machine, thereby greatly improving the application scenarios of the multimedia all-in-one machine including the USB channel switching device, and meeting the requirements under different conditions.
Further, as an implementation manner of the embodiment, the first switch module 12 includes a first function pin connected to the microprocessor module 4, the first function pin is configured to receive a first switching signal, and the first switch switching module selects one of the PC port channel and the mobile port channel according to the first switching signal.
Further, as an implementation manner of this embodiment, as shown in fig. 4, the second switch module 15 includes a tenth function pin corresponding to the front channel, the built-in channel, and the back channel, and the second switch module 15 selects the tenth function pin to connect with an external device corresponding to any one of the front channel, the built-in channel, and the back channel according to the second switching signal.
Specifically, a tenth function pin corresponding to the front channel is connected to the front channel device 5, a tenth function pin corresponding to the built-in channel is connected to the built-in channel device 6, and a tenth function pin corresponding to the rear channel is connected to the rear channel device 7.
The switch chip in the second switch module 15 may be a chip with a model number U15. When the switch chip model in the second switch module 15 is a U15 chip, as shown in fig. 4, the tenth function pin includes a pin FTP _ D +, a pin FTP _ D-, a pin ops _ touch _ D +, a pin ops _ touch _ D-, a pin back _ touch _ D +, and a pin back _ touch _ D-. Specifically, a pin FTP _ D + and a pin FTP _ D-are respectively connected with external front-end channel equipment, a pin ops _ touch _ D + and a pin ops _ touch _ D-are respectively connected with external built-in channel equipment, and a pin back _ touch _ D + and a pin back _ touch _ D-are respectively connected with external rear-end channel equipment.
It should be noted that, in this embodiment, the front channel device 5, the built-in channel device 6, and the back channel device 7 may include various readable storage media, that is, the front channel device 5, the built-in channel device 6, and the back channel device 7 may be the USB device 2 in this embodiment, and the multimedia all-in-one machine applying the USB channel switching apparatus is implemented to extend an external device.
In the present embodiment, by providing the tenth function pin corresponding to the front channel, the built-in channel, and the back channel in the second switch module 15, the second switch module 15 can be connected to any one of the external front channel device 5, the built-in channel device 6, and the back channel device 7.
Further, as an implementation manner of this embodiment, as shown in fig. 4, the second switch module 15 further includes an eleventh function pin connected to the microprocessor module 4, and the eleventh function pin is configured to receive the second switching signal.
Specifically, the second switch module 15 connects the eleventh functional pin with the corresponding tenth functional pin according to the second switching signal output by the microprocessor module 4. Taking the exemplary circuit structure shown in fig. 4 as an example, the eleventh functional pin is the pin SEL0 and the pin SEL1, the level of the pin SEL0 and the level of the pin SEL1 inputted into the first functional pin by the microprocessor module 4 are used as the second switching signal, and the following table (1) shows that the level of the pin SEL0 and the level of the pin SEL1 select the corresponding channel relationship:
pin SEL0 Low level of electricity Low level of electricity High level Low level of electricity
Pin SEL1 Low level of electricity High level Low level of electricity High level
Selection channel Do not process Front channel Built-in channel Rear channel
Watch (1)
As shown in fig. 4, when the second switch module 15 is selected to select the channel as the front channel, the pin HOST _ USB + of the fifth function pin is controlled to be connected to the pin FTP _ D +, and the pin HOST _ USB-of the fifth function pin is controlled to be connected to the pin FTP _ D-, so that the USB device 2, the USB interface 11, the first switch module 12, the touch screen frame 16, the PC-side signal processing module 14, the microprocessor module 4, the second switch module 15, and the front channel device 5 form a front channel circuit of the PC-side operating system, and the external microprocessor module 4 can read data in the front channel device 5 through the second switch module 15; when the channel selected by the second switch module 15 is a built-in channel, controlling a pin HOST _ USB + in the fifth function pin to be connected with a pin ops _ touch _ D +, and controlling a pin HOST _ USB-in the fifth function pin to be connected with a pin ops _ touch _ D-, so that the USB device 2, the USB interface 11, the first switch module 12, the touch screen frame 16, the PC-side signal processing module 14, the microprocessor module 4, the second switch module 15, and the built-in channel device 6 form a built-in channel circuit of a PC-side operating system, and the external microprocessor module 4 can read data in the built-in channel device 6 through the second switch module 15; when the channel selected by the second switch module 15 is a rear channel, the pin HOST _ USB + in the fifth function pin is controlled to be connected with the pin back _ touch _ D +, and the pin HOST _ USB-in the fifth function pin is controlled to be connected with the pin back _ touch _ D-, so that the USB device 2, the USB interface 11, the first switch module 12, the touch screen frame 16, the PC-side signal processing module 14, the microprocessor module 4, the second switch module 15, and the rear channel device 7 form a rear channel circuit of a PC-side operating system, and the external microprocessor module 4 can read data in the rear channel device 7 through the second switch module 15.
Note that the external device corresponding to the front channel is a front channel device 5, the external device corresponding to the built-in channel is a built-in channel device 6, and the external device corresponding to the back channel is a back channel device 7.
In this embodiment, by setting the eleventh function pin in the second switch module 15, the second switch module 15 can select any one of the back channel circuit of the PC-side operating system, the front channel circuit of the PC-side operating system, and the built-in channel circuit of the PC-side operating system in the channel circuits of the PC-side operating system to operate according to the second switching signal received by the eleventh function pin, so as to implement expansion of the multimedia all-in-one machine including the USB channel switching device to the external device.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (8)

1. The utility model provides a USB passageway auto-change over device, is applied to and installs the multimedia integrated machine who removes end operating system and PC end operating system, its characterized in that includes: the mobile terminal comprises a USB interface, a first switch module, a second switch module, a PC terminal signal processing module, a mobile terminal signal processing module and a touch screen frame, wherein the USB interface, the first switch module, the PC terminal signal processing module and the second switch module are sequentially connected, the touch screen frame is respectively connected with the PC terminal signal processing module and the mobile terminal signal processing module, the first switch module is connected with the mobile terminal signal processing module, and the mobile terminal signal processing module, the first switch module and the second switch module are respectively connected with an external microprocessor module;
the USB interface is used for being connected with external USB equipment, the external microprocessor module sends a first switching signal to the first switch module and sends a second switching signal to the second switch module according to the running state of the current mainboard, the first switch module is used for selecting a corresponding channel in the multimedia all-in-one machine according to the first switching signal, and the second switch module is used for selecting a corresponding channel in a PC channel according to the second switching signal;
the touch screen frame is used for acquiring touch screen data formed on the touch screen;
when the first switch module is switched to a mobile terminal channel, touch screen data obtained by the touch screen frame is sent to the external microprocessor through the mobile terminal signal processing module;
when the first switch module is switched to a PC (personal computer) end channel, the touch screen data acquired by the touch screen frame are sequentially sent to the external microprocessor through the PC end signal processing module and the second switch module;
when the mainboard runs a mobile terminal operating system, the first switch module selects a mobile terminal channel corresponding to the mobile terminal operating system according to the first switching signal; when the mainboard runs a PC end operating system, the first switch module selects a PC end channel corresponding to the PC end operating system according to the first switching signal, meanwhile, the external microprocessor sends the second switching signal to the second switch module according to the running state of the mainboard, and the second switch module selects a channel corresponding to the second switching signal in the PC channel according to the second switching signal;
the second switch module comprises a tenth function pin corresponding to a front channel, a built-in channel and a rear channel, and the tenth function pin is selected by the second switch module according to the second switching signal to be connected with external equipment corresponding to any one of the front channel, the built-in channel and the rear channel;
the second switch module further comprises an eleventh function pin connected with the microprocessor module, the eleventh function pin is used for receiving the second switching signal, and the level of the eleventh function pin is set to be the second switching signal, so that the front channel, the built-in channel and the rear channel are switched according to the second switching signal.
2. The USB channel switching device of claim 1, wherein the first switch module comprises a first function pin connected to the microprocessor module, the first function pin is configured to receive the first switching signal, and the first switch module selects one of the PC side channel and the mobile side channel according to the first switching signal.
3. The USB channel switching device of claim 1, wherein the first switch module comprises a second function pin, the PC side signal processing module comprises a third function pin, and the second function pin and the third function pin are connected in a one-to-one correspondence.
4. The USB channel switching device according to claim 3, wherein the PC side signal processing module further comprises a fourth function pin, the second switch module comprises a fifth function pin, the fourth function pin and the fifth function pin are connected in a one-to-one correspondence, and the PC side signal processing module is configured to control a conduction state between the fourth function pin and the fifth function pin.
5. The USB channel switching device according to claim 3, wherein the PC side signal processing module further includes a sixth function pin for connecting with the touch screen frame, and the PC side signal processing module is configured to control a conduction state between the sixth function pin and the touch screen frame.
6. The USB channel switching device of claim 3, wherein the second switch module further comprises a seventh function pin, the PC side signal processing module comprises an eighth function pin, and the seventh function pin is connected with the eighth function pin in a one-to-one correspondence manner.
7. The USB channel switching device of claim 3, wherein the mobile terminal signal processing module further comprises a ninth function pin for connecting with the microprocessor module.
8. The USB channel switching device according to any one of claims 1 to 7, wherein:
when the mainboard runs a mobile terminal system and the USB interface is externally connected with the USB equipment, the microprocessor module, the mobile terminal signal processing module, the first switch module, the USB interface and the USB equipment form a channel circuit of the mobile terminal operating system;
when the mainboard runs a PC end system and the USB interface is externally connected with the USB equipment, the microprocessor module, the second switch module, the PC end signal processing module, the touch screen frame, the first switch module, the USB interface and the USB equipment form a channel circuit of the PC end operating system.
CN201911409855.9A 2019-12-31 2019-12-31 USB channel switching device Active CN111124957B (en)

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