CN113238979A - System with type c interface or lightning interface for automatically detecting kvm mode and display equipment thereof - Google Patents
System with type c interface or lightning interface for automatically detecting kvm mode and display equipment thereof Download PDFInfo
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- CN113238979A CN113238979A CN202110663884.9A CN202110663884A CN113238979A CN 113238979 A CN113238979 A CN 113238979A CN 202110663884 A CN202110663884 A CN 202110663884A CN 113238979 A CN113238979 A CN 113238979A
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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
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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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
- G06F13/38—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
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- 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 discloses a system with a type c interface or a thunder and lightning interface for automatically detecting a kvm mode, which comprises a first uplink data interface, a second uplink data interface, a third uplink data interface and a GPIO (general purpose input/output) interface, wherein the first uplink data interface comprises a USB-B interface, and the output end of the first uplink data interface is connected with a GPIO (general purpose input/output) port of a decoding chip MCU (microprogrammed control unit); the input end of the first pull-up resistor circuit is connected with the output end of the first uplink data interface; the second uplink data interface comprises a type c interface or a thunder and lightning interface, and the output end of the second uplink data interface is connected with the other GPIO port of the MCU; the input end of the second pull-up resistor circuit is connected with the output end of the second uplink data interface; the decoding chip MCU judges whether the first and second uplink data interfaces are inserted according to the high-low level states of the corresponding GPIOs, and sends the judgment result to the uplink data switch; the uplink data switch switches the inserted uplink data interface according to the received judgment result; and the USB HUB chip is connected with the downlink data interface. The system can automatically switch according to the connected uplink data interface, and a prompt can be popped up to guide the user to quickly know and make a selection.
Description
Technical Field
The invention relates to the technical field of KVM systems, in particular to a system with a type c interface or a lightning interface for automatically detecting a KVM mode and display equipment thereof.
Background
KVM is an abbreviation for Keyboard Video Mouse. The KVM switch allows an end user to switch the keyboard/mouse/video interface between multiple hosts at will by directly connecting the keyboard, video and mouse (KVM) ports, facilitating some scenarios where multiple hosts are used simultaneously. KVM stands for Keyboard (Keyboard), display (Video) and Mouse (Mouse), i.e. a group of Keyboard, display and Mouse is used to control multiple devices, playing an important role in remote scheduling and monitoring. The KVM switch (KVM) uses a multi-host switching technology as a basis to complete the switching among a plurality of servers by means of a group of keyboard, mouse and display, thereby saving space, reducing cost, making management easier and more convenient and improving work efficiency.
Particularly, two most common applications (A) are that a notebook computer is thinner and thinner at present on a display device with a Type C interface or a lightning interface, and many notebook computers only have the Type C interface or the lightning interface but do not have a USB-A/USB-B interface, so that if a USB device which is commonly used by an external keyboard/mouse/USB flash disk … is used, only one external docking station can be added. Many display devices now have USB interfaces, i.e., KVM capability, such as monitor/meeting machine/advertising machine/education machine …, which are only required to have space to fit the USB connectors. (B) The display device is connected with two notebooks with Type C or thunder and lightning interfaces (non-Type C or thunder and lightning ultrathin notebook) or application scenes of desktop computers. If the keyboard/mouse is frequently switched, the keyboard/mouse can only be continuously plugged between the two hosts, so that the display equipment has the KVM function and is very convenient. Based on the two scenes, the KVM function is designed for some middle and high-end display equipment at present.
At present, many display devices have a USB B interface and a Type C interface, or a USB B interface and a lightning interface, and most KVM functions only process a USB data stream, but do not identify two or more "uplink data interfaces", so that a user needs to select two or more "uplink data interfaces", that is, to have an independent key or an OSD option, and switch between the USB B/Type C or the USB B/lightning as uplink data, but cannot freely switch according to the actual wiring situation.
Therefore, the system with the Type C interface or the thunder and lightning interface for automatically detecting the kvm mode is provided, and the USB B interface or the Type C/thunder and lightning interface is used as uplink data to be switched.
Disclosure of Invention
The invention aims to provide a system with a type c interface or a thunder and lightning interface for automatically detecting a kvm mode, so as to solve the problem that the user experience is poor when an uplink data interface is manually switched.
In order to achieve the purpose, the invention provides the following technical scheme:
a system with type c interface or thunder and lightning interface for automatically detecting kvm mode includes,
the first uplink data interface comprises a USB-B interface, and the output end of the first uplink data interface is connected with a GPIO port of the MCU;
the input end of the first pull-up resistor circuit is connected with the output end of the first uplink data interface;
the second uplink data interface comprises a type c interface or a lightning interface, and the output end of the second uplink data interface is connected with the other GPIO port of the MCU;
the input end of the second pull-up resistor circuit is connected with the output end of the second uplink data interface;
the decoding chip MCU is used for identifying whether the two uplink data interfaces are inserted or not in real time, judging whether the first uplink data interface and the second uplink data interface are inserted or not according to the high-low level state of the corresponding GPIO and sending the judgment result to the uplink data switch;
the uplink data switch switches the inserted uplink data interface according to the received judgment result;
and the USB HUB chip is connected with a downlink data interface.
Furthermore, the device also comprises a storage unit which is independent of the decoding chip MCU or integrated in the decoding chip MCU.
And if the received judgment result of the uplink data switch is that the first uplink data interface and the second uplink data interface are simultaneously inserted, the reminding module sends reminding information, otherwise, the reminding information is not sent.
Furthermore, the first pull-up resistor circuit comprises a pull-up resistor R1, the second pull-up resistor circuit comprises a pull-up resistor R2, the output end of the first uplink data interface is connected with one end of a pull-up resistor R1, and the other end of the pull-up resistor R1 is connected with VCC voltage; the output end of the first uplink data interface is connected with one end of a pull-up resistor R2, and the other end of the pull-up resistor R2 is connected with VCC voltage.
Furthermore, the first pull-up resistor circuit comprises pull-up resistors R5 and R3, the second pull-up resistor circuit comprises pull-up resistors R6 and R4, the output end of the first uplink data interface is connected with the input end of a pull-up resistor R5, the output end of the pull-up resistor R5 is connected with a GPIO port of the decoding chip MCU, the output end of the pull-up resistor R5 is connected with one end of the pull-up resistor R3, and the other end of the pull-up resistor R3 is grounded; the output end of the second uplink data interface is connected with the input end of a pull-up resistor R6, the output end of a pull-up resistor R6 is connected with the other GPIO port of the decoding chip MCU, the output end of the pull-up resistor R6 is connected with one end of a pull-up resistor R4, and the other end of the pull-up resistor R4 is grounded.
Further, a display device is provided, which comprises the system with type c interface or thunder and lightning interface for automatically detecting the kvm mode.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a system with a Type C interface for automatically detecting a kvm mode, which can automatically switch according to a connected uplink data interface, can pop up a prompt to prompt that two uplink data interfaces are available at present, guides a user to quickly know and make a selection, and automatically switches a USB B interface or a Type C/thunder and lightning interface as uplink data.
Drawings
FIG. 1 is a structural block of the present invention;
FIG. 2 is a diagram of an embodiment of a pull-up resistor circuit when the Type C interface is used as the second uplink data interface;
FIG. 3 is a diagram of an embodiment of a pull-up resistor circuit with the lightning interface as the second upstream data interface.
Fig. 4 is a diagram of another embodiment of a pull-up resistor circuit when the Type C interface is used as the second uplink data interface.
FIG. 5 is a diagram of another embodiment of a pull-up resistor circuit with the lightning interface acting as a second upstream data interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 to 5, the present invention provides a system for automatically detecting a kvm mode with a type c interface or a lightning interface, including: the first uplink data interface comprises a USB-B interface, and the output end of the first uplink data interface is connected with a GPIO port of the MCU; the input end of the first pull-up resistor circuit is connected with the output end of the first uplink data interface; the second uplink data interface is a type c interface or a lightning interface, and the output end of the second uplink data interface is connected with the other GPIO port of the MCU; the input end of the second pull-up resistor circuit is connected with the output end of the second uplink data interface; the decoding chip MCU is used for identifying whether the two uplink data interfaces are inserted or not in real time, judging whether the first uplink data interface and the second uplink data interface are inserted or not according to the high-low level state of the corresponding GPIO and sending the judgment result to the uplink data switch; the uplink data switch switches the inserted uplink data interface according to the received judgment result; and the USB HUB chip is connected with the upper data switch and the lower data interface. The system can automatically switch according to the connected uplink data interface, and automatically switches the USB B interface and the Type C/thunder and lightning interface as uplink data. The second upstream data interface also includes a lightning interface including a lightning three interface or a lightning four interface. At present, many display devices are provided with two uplink data interfaces of a USB B interface and a Type C interface, or two uplink data interfaces of a USB B interface and a thunder and lightning interface, a decoding chip MCU identifies each uplink data interface, namely a USB-B/Type C line is inserted/not inserted or a USB-B/thunder and lightning line is inserted/not inserted, the decoding chip MCU can identify/store/power off memorize each state and make corresponding logic judgment, as long as the display device is powered, two independent GPIOs respectively detect a USB-B/Type C line or a USB-B/thunder and lightning line, when an interface line is inserted/not inserted, the high and low level states of the corresponding GPIO interface are different, and the decoding chip MCU judges that the interface line is inserted/not inserted through the high and low level states of the GPIO interface port, and sending the judgment result to an uplink data switch; and the uplink data switch can be an independent key or an OSD (on screen display) option of a display, and switches the inserted uplink data interface according to the received judgment result. Taking two uplink data interfaces, namely a USB B interface and a Type C interface, of the display device as an example, assuming that factory defaults or a user sets default to USB-B as the uplink data interface, or sets USB-B as the uplink data interface in the last power failure, or the USB-B is used as the uplink data interface in the use process of the display device, if the user is powered on at the present time, the USB-B line is inserted, the decoding chip MCU judges whether the USB-B line is inserted, and the display device or the USB-B is used as the uplink data interface; if the user is powered on at the moment, the Type C line is inserted, the decoding chip MCU judges that the Type C line is inserted through the high-low level state of the GPIO port, the judgment result is sent to the uplink data switch, the uplink data switch switches the inserted uplink data interface, the USB-B is switched into the Type C uplink data interface as the uplink data interface, and the display device still uses the Type C uplink data interface; suppose that the factory defaults to Type C as the uplink data interface, or last power failure sets Type C as the uplink data interface, and vice versa. Similarly, the display device has two uplink data interfaces, namely a USB B interface and a lightning interface, and the method is also applicable. The embodiment of the invention relates to two different uplink data interfaces (a USB B interface and a thunder interface or a USB B interface and a Type C interface), when a device relates to a plurality of (more than two) uplink data interfaces for selection, the device is also in a protection range, for example, the uplink data interfaces have two Type C interfaces or one USB B interface, the default first Type C interface is set as the uplink data interface in the same way, a decoding chip MCU judges an inserted data line through the high-low level state of a GPIO interface, sends the judgment result to an uplink data switch, and the uplink data switch switches the inserted uplink data interface.
And if the received judgment result of the uplink data switch is that the first uplink data interface and the second uplink data interface are simultaneously inserted, the reminding module sends reminding information, otherwise, the reminding information is not sent. The reminding module comprises a display screen, and is used for visual reminding, the display screen can pop up a prompt, two uplink data ports are available at present for reminding, a certain interface (a USB-B interface, a Type C interface or a thunder interface) is set last time, a user is guided to quickly know and make a selection, the reminding module further comprises a microphone, and the microphone sounds to remind the user as sound.
The storage unit is independent of the decoding chip MCU or integrated in the decoding chip MCU, the storage unit stores default set or factory set uplink data interface types or last power-off set uplink data interface type data, and if the received judgment result of the uplink data switch is that the first uplink data interface and the second uplink data interface are simultaneously inserted, the uplink data switch is switched and connected to the default set uplink data interface types or the last power-off set uplink data interface types. The storage unit stores default uplink data interface types or last power-off uplink data interface type data, and if the received judgment result of the uplink data switch is that the first uplink data interface and the second uplink data interface are simultaneously inserted, the uplink data switch is switched and connected to the default uplink data interface types or the last power-off uplink data interface types. When a first uplink data interface (USB-B interface) and a second uplink data interface (Type C interface or thunder and lightning interface) are inserted at the same time, the decoding chip MCU recognizes that the storage unit stores uplink data interface Type data of default setting or last power-off setting, if a user does not manually select to switch the uplink data interface after seeing a prompt, the uplink data switch can switch the uplink data interface of the default setting or the last power-off setting after receiving a command of the decoding chip MCU. If factory default setting is that the Type C/thunder interface is used as an uplink data interface or last power failure setting is that the Type C/thunder interface is used as an uplink data interface, a USB-B line is inserted, a user can see a prompt, the prompt is that the current default setting Type C interface/thunder interface is the uplink data interface, at the moment, two uplink data interfaces are inserted simultaneously, if the user does not select switching, the user can automatically switch to the uplink data interface with default setting or last power failure setting, and the user switches to use the USB-B interface as the uplink data interface.
Further, as shown in fig. 2 and fig. 3, in an embodiment of the pull-up resistor circuit when the Type C interface or the lightning interface serves as the second uplink data interface, the first pull-up resistor circuit includes a pull-up resistor R1, the second pull-up resistor circuit includes a pull-up resistor R2, the output end of the first uplink data interface is connected to one end of a pull-up resistor R1, and the other end of the pull-up resistor R1 is connected to the VCC voltage; the output end of the first uplink data interface is connected with one end of a pull-up resistor R2, and the other end of the pull-up resistor R2 is connected with VCC voltage. Adopt the design of drop-down ground connection, listen respectively to the data line of first ascending data interface (USB-B interface) and the second ascending data interface (Type C interface or thunder and lightning interface) by two independent GPIOs: when a first uplink data interface (USB-B interface) data line and a second uplink data interface (Type C interface or thunder and lightning interface) line are not inserted, the corresponding GPIO is in a high level state; when a first uplink data interface (USB-B interface) data line and a second uplink data interface (Type C interface or thunder and lightning interface) line are inserted, the corresponding GPIO is in a low level state, the decoding chip MCU judges whether the interface line is inserted or not through the high and low level state of the GPIO, and the uplink data interfaces are automatically and timely switched.
Further, as shown in fig. 4 and 5, in another embodiment of the pull-up resistor circuit when the Type C interface or the lightning interface serves as the second uplink data interface, the first pull-up resistor circuit includes pull-up resistors R5 and R3, the second pull-up resistor circuit includes pull-up resistors R6 and R4, the output end of the first uplink data interface is connected to the input end of a pull-up resistor R5, the output end of the pull-up resistor R5 is connected to a GPIO port of the decoding chip MCU, the output end of the pull-up resistor R5 is connected to one end of the pull-up resistor R3, and the other end of the pull-up resistor R3 is grounded; the output end of the second uplink data interface is connected with the input end of a pull-up resistor R6, the output end of a pull-up resistor R6 is connected with the other GPIO port of the decoding chip MCU, the output end of the pull-up resistor R6 is connected with one end of a pull-up resistor R4, and the other end of the pull-up resistor R4 is grounded. By adopting a pull-up VBUS design, a first uplink data interface (USB-B interface) data line and a second uplink data interface (Type C interface or thunder and lightning interface) line are respectively detected by two independent GPIOs: when a first uplink data interface (USB-B interface) data line and a second uplink data interface (Type C interface or thunder and lightning interface) line are not inserted, the corresponding GPIO is in a low level state; when a first uplink data interface (USB-B interface) data line and a second uplink data interface (Type C interface or thunder and lightning interface) line are inserted, the corresponding GPIO is in a high level state, the decoding chip MCU judges whether the interface line is inserted or not through the high and low level state of the GPIO, and the uplink data interfaces are automatically and timely switched.
Further, the second upstream data interface also includes a lightning interface including a lightning three interface or a lightning four interface.
A display device comprises the system for automatically detecting the kvm mode with the Type C interface or the lightning interface. The display device may be a display, a conference machine, etc.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A take type c interface or thunder and lightning interface auto-detection kvm mode's system which characterized in that includes:
the first uplink data interface comprises a USB-B interface, and the output end of the first uplink data interface is connected with a GPIO port of the MCU;
the input end of the first pull-up resistor circuit is connected with the output end of the first uplink data interface;
the second uplink data interface comprises a type c interface or a lightning interface, and the output end of the second uplink data interface is connected with the other GPIO port of the MCU;
the input end of the second pull-up resistor circuit is connected with the output end of the second uplink data interface;
the decoding chip MCU is used for identifying whether the two uplink data interfaces are inserted or not in real time, judging whether the first uplink data interface and the second uplink data interface are inserted or not according to the high-low level state of the corresponding GPIO and sending the judgment result to the uplink data switch;
the uplink data switch switches the inserted uplink data interface according to the received judgment result;
and the USB HUB chip is connected with a downlink data interface.
2. The system of claim 1, wherein the type c or thunderbolt interface is configured to automatically detect kvm mode, and wherein: the MCU decoding device further comprises a storage unit which is independent of the decoding chip MCU or integrated in the decoding chip MCU.
3. The system for automatically detecting kvm mode with type c or thunderbolt interface as claimed in claim 1 or 2, wherein: the system also comprises a reminding module, if the received judgment result of the uplink data switch is that the first uplink data interface and the second uplink data interface are inserted simultaneously, the reminding module sends reminding information, otherwise, the reminding information is not sent.
4. The system of claim 3 for automatically detecting kvm mode with type c or thunderbolt interface, comprising: the first pull-up resistor circuit comprises a pull-up resistor R1, the second pull-up resistor circuit comprises a pull-up resistor R2, the output end of the first uplink data interface is connected with one end of a pull-up resistor R1, and the other end of the pull-up resistor R1 is connected with VCC voltage; the output end of the first uplink data interface is connected with one end of a pull-up resistor R2, and the other end of the pull-up resistor R2 is connected with VCC voltage.
5. The system of claim 3 for automatically detecting kvm mode with type c or thunderbolt interface, comprising: the first pull-up resistor circuit comprises pull-up resistors R5 and R3, the second pull-up resistor circuit comprises pull-up resistors R6 and R4, the output end of the first uplink data interface is connected with the input end of a pull-up resistor R5, the output end of the pull-up resistor R5 is connected with a GPIO port of the decoding chip MCU, the output end of the pull-up resistor R5 is connected with one end of the pull-up resistor R3, and the other end of the pull-up resistor R3 is grounded; the output end of the second uplink data interface is connected with the input end of a pull-up resistor R6, the output end of a pull-up resistor R6 is connected with the other GPIO port of the decoding chip MCU, the output end of the pull-up resistor R6 is connected with one end of a pull-up resistor R4, and the other end of the pull-up resistor R4 is grounded.
6. A display device comprising the system for automatically detecting kvm mode with type c interface of any of claims 1 to 5.
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| CN202110663884.9A CN113238979A (en) | 2021-06-16 | 2021-06-16 | System with type c interface or lightning interface for automatically detecting kvm mode and display equipment thereof |
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| CN202110663884.9A CN113238979A (en) | 2021-06-16 | 2021-06-16 | System with type c interface or lightning interface for automatically detecting kvm mode and display equipment thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114490483A (en) * | 2022-01-18 | 2022-05-13 | 广州朗国电子科技股份有限公司 | Novel USB framework |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114490483A (en) * | 2022-01-18 | 2022-05-13 | 广州朗国电子科技股份有限公司 | Novel USB framework |
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