Switching board with USB (Universal Serial Bus) and PS / 2 external equipment double-input interface

Abstract

The utility model relates to the technical field of information processing circuit boards, and provides a switching board with a USB (Universal Serial Bus) and PS / 2 external equipment double-input interface, which comprises a PCB (Printed Circuit Board); a main control module, a user input module, at least one cascade control module and at least two groups of external input modules are integrated on the PCB; wherein the user input module comprises at least one input port, and the input port supports connection of USB equipment and PS / 2 equipment; each group of external input modules comprises at least one path of external video signal switching module and at least one path of external equipment input module, and the external equipment input module supports to be connected with USB equipment and PS / 2 equipment; the main control module is connected to one group of external input modules, and the cascade control module is connected to one group of external input modules. The external PS / 2 equipment and the external USB equipment which are connected with the switching board can be switched and controlled through the single switching board, and centralized control management is provided for information technology equipment in a data center.

Description

Technical Field

[0001] The utility model relates to the technical field of information processing circuit boards, in particular to a switching board with dual input interfaces of USB and PS / 2 external devices. Background Art

[0002] With the rapid increase of information technology equipment in data centers and the advancement of technology, the newly added equipment in the computer room is all new USB interface devices, while most of the traditional computer room equipment uses outdated PS / 2 interface devices. Due to data security restrictions in data centers, the outdated PS / 2 devices will not be removed, but used together with new equipment to serve data processing.

[0003] However, these obsolete PS / 2 devices are difficult to be compatible with USB, and when it is necessary to control both new USB devices and previous obsolete PS / 2 devices at the same time, it is difficult to carry out effective control. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present application provides a switching board with dual input interfaces of USB and PS / 2 external devices, which can provide centralized control for information technology equipment in a data center.

[0005] In order to solve the above problems, the utility model provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a switching board having a dual input interface of a USB and a PS / 2 external device, the switching board comprising: a PCB circuit board;

[0007] The PCB circuit board is integrated with a main control module, a user input module, at least one cascade control module, and at least two groups of external input modules; wherein,

[0008] The user input module includes at least one input port, and the input port supports connecting a USB device and a PS / 2 device;

[0009] Each group of the external input modules includes at least one external video signal switching module and at least one external device input module, and the external device input module supports connecting USB devices and PS / 2 devices;

[0010] The main control module is connected to a group of the external input modules, and the cascade control module is connected to a group of the external input modules.

[0011] In some implementations, the main control module includes a main control chip and a switching circuit.

[0012] In some implementations, the main control chip in the main control module changes the external device currently selected by the switching board through the switching circuit.

[0013] In some implementations, one of the external video signal switching modules and one of the external device input modules share one interface, and each of the interfaces is connected to one external device.

[0014] In some embodiments, the switch board further includes:

[0015] Display module;

[0016] The display module is used to connect to a display screen to display the device screen of the external device currently selected by the switch board.

[0017] In some implementations, a USB device or PS / 2 device connected to the input port of the user input module is used to change the external device currently selected by the switch board to change the device screen displayed on the display screen connected to the display module.

[0018] In some embodiments, the switch board further includes:

[0019] An OSD module, wherein the OSD module includes an OSD hot key, and the OSD hot key is used to change the external device currently selected by the switching board to change the device screen displayed on the display screen connected to the display module.

[0020] In some embodiments, the switching board further includes a power module;

[0021] The power supply module is used to convert 220V voltage into 5V voltage and 3.3V voltage through a power adapter. The 5V voltage is supplied to the user input module, and the 3.3V voltage is supplied to the main control module, the cascade control module, and each group of external input modules.

[0022] The present application provides a switching board with dual input interfaces of USB and PS / 2 external devices, the switching board comprising: a PCB circuit board; a main control module, a user input module, at least one cascade control module, and at least two groups of external input modules are integrated on the PCB circuit board; wherein the user input module comprises at least one input port, and the input port supports connecting USB devices and PS / 2 devices; each group of external input modules comprises at least one external video signal switching module and at least one external device input module, and the external device input module supports connecting USB devices and PS / 2 devices; the main control module is connected to a group of external input modules, and the cascade control module is connected to a group of external input modules. The present application can switch and control external PS / 2 devices and external USB devices connected to the switching board through a single switching board, and provide centralized control and management for information technology equipment in a data center. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of a switching board with dual input interfaces of USB and PS / 2 external devices provided in an embodiment of the present application.

[0024] Figure 2 It is a connection diagram of a switching board with dual input interfaces of USB and PS / 2 external devices provided in an embodiment of the present application.

[0025] Figure 3 It is a flow chart of switching and controlling external devices provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] For the convenience of describing the first direction and the second direction in the embodiment of the present application, the first direction is the up-down direction in the drawings, the second direction is the front-back direction in the drawings, and the third direction is the left-right direction in the drawings. The x-axis arrow direction is referred to as the "up" direction in the following text, the y-axis arrow direction is referred to as the "back" direction in the following text, and the z-axis arrow direction is referred to as the "right" direction in the following text, which is not limited to the actual application of the present application.

[0029] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of a switching board with dual input interfaces of USB and PS / 2 external devices provided in an embodiment of the present application.

[0030] like Figure 1 As shown, the switch board with dual input interfaces of USB and PS / 2 external devices includes: a PCB circuit board 10, on which a main control module 1, at least two groups of external input modules 2, a user input module 3, and at least one cascade control module 4 are integrated.

[0031] Each group of the external input modules 2 includes at least one external video signal switching module 22 and at least one external device input module 21, and the external device input module 21 supports connecting USB devices and PS / 2 devices.

[0032] The main control module 1 is connected to a group of the external input modules 2 , and the cascade control module 4 is connected to a group of the external input modules 2 .

[0033] Specifically, the input port in the user input module 3 supports connecting both USB devices and PS / 2 devices. For example, a certain input port can be inserted into a USB mouse or a PS / 2 mouse. Optionally, the input port is used to connect an operating device, such as a mouse, keyboard, touchpad, etc. The user can control the switching board through the operating device, which will be specifically introduced in the following part of the manual.

[0034] In some implementations, the main control module includes a main control chip and a switching circuit. Optionally, the main control chip is an LPC2163 chip, but this application does not limit the specific chip type.

[0035] In some implementations, the main control chip in the main control module changes the external device currently selected by the switching board through the switching circuit.

[0036] In some implementations, one of the external video signal switching modules 22 and one of the external device input modules 21 share one interface, and each of the interfaces is connected to one external device.

[0037] In some implementations, the external device input module 21 and the external video signal switching module 22 in the external input module 2 are analog chips and analog circuits; wherein the analog chip is used to manage the communication control of the analog circuit.

[0038] In some implementations, the analog chip may be a CY7C63813 chip, but the above chip model is only used as an example and should not be understood as a limitation on the chip model.

[0039] In some embodiments, the analog chip is an 8-bit flash programmable microcontroller with an integrated low-speed USB interface. This chip does not require a programmer and can write a pre-programmed keyboard and mouse switching control program into an external memory. The analog chip forwards the keyboard and mouse control signals sent by the user input module 3 to the connected external device to achieve the operation control effect.

[0040] In some embodiments, the external video signal switching module 22 includes an analog circuit, which converts the video signal received from the external device into an analog signal and forwards it to the display module 6 for display.

[0041] Specifically, the working principle of the switching board is that when the user selects the target external device through the keyboard and mouse connected to the user input module 3 or the OSD hot key in the OSD module, the switching board will establish a connection with the target external device through the VGA interface connected to the target external device, that is, the external video signal switching module 22, and forward the keyboard and mouse signals to the target external device to achieve the keyboard and mouse control effect, and forward the VGA video signal of the target external device to the display module 6 for imaging display.

[0042] In some embodiments, each external input module 2 includes N external video signal switching modules 22 and N external device input modules 21. One external video signal switching module 22 and one external device input module 21 are connected to one external device. N is a positive integer, that is, each external input module 2 can be connected to N external devices. When there are too many external devices to be connected, the number of cascade control modules 4 can be increased, thereby increasing the number of external input modules 2 to connect more external devices.

[0043] Optionally, the external device is a device that needs to be controlled, such as an outdated PS / 2 interface device or a new USB device in a computer room.

[0044] Optionally, the value of N is 8 or 16, but this application does not limit this.

[0045] In some implementations, the switch panel further includes: a display module 6, wherein the display module 6 is configured to display a device screen of the external device currently selected by the switch panel.

[0046] In some implementations, the USB device or PS / 2 device connected to the input port of the user input module 3 is used to change the external device currently selected by the switch board to change the device screen displayed by the display module 6 .

[0047] In some embodiments, the switch board further includes: an OSD module, the OSD module includes an OSD hot key, and the OSD hot key is used to change the external device currently selected by the switch board to change the device screen displayed on the display screen connected to the display module.

[0048] Specifically, the external device connected to the external input module 2 is connected to the switching board via a communication line, and the external devices with different interfaces input the signals into the main control module of the switching board via the USB communication simulation module or the PS / 2 communication simulation module. At the same time, the video signal of the external device is input to the main control module via the simulation module of the external video signal switching module 22. The main control module 1 processes the data according to the signal and transmits it to the display module 6 for video display. The user selects, controls and switches the external device for device management by inserting the keyboard, mouse or OSD module into the input port 3.

[0049] In some embodiments, the switching board further comprises a power module;

[0050] The power supply module is used to convert 220V voltage into 5V voltage and 3.3V voltage through a power adapter. The 5V voltage is supplied to the user input module, and the 3.3V voltage is supplied to the main control module, the cascade control module, and each group of external input modules.

[0051] In some implementations, the external video signal switching module 22 is a video graphics array (VGA) interface.

[0052] In some embodiments, a video centralized control chip and circuit (not shown in the figure) are also provided on the PCB circuit board 10. The video centralized control chip includes five 74HC series chips. Two 74HC chips are responsible for synchronizing the horizontal and vertical frame numbers of the VGA display on the external device to ensure accurate display effects; three 74HC chips are responsible for simulating the VGA red, green, and blue color channels to display text image colors.

[0053] It is understandable that the above chip models are only examples and should not be construed as limitations on chip models.

[0054] In some embodiments, the switching board also has a USB bus interface module (not marked in the figure). The bus chip (the chip model is not limited and the chip with the same function can be replaced) is responsible for the communication between the USB device and the host. It can connect and manage multiple USB devices at the same time. The bus interface chip also supports SPI communication, supports low-speed and full-speed control transmission, batch transmission, interrupt transmission and synchronous / isochronous transmission, so that the chip can easily cope with multi-device scenarios; making data transmission more efficient.

[0055] Optionally, the bus chip may be a CH374U chip, but the above chip models are only examples and should not be understood as limitations on chip models.

[0056] In some implementations, the main control module 1 is connected to the OSD module via an I2 C bus; the main control module 1 is connected to the external video signal switching module 21, i.e. the above-mentioned VGA interface, via GPIO; the main control module is connected to the external device input module 21, i.e. the above-mentioned analog chip, via SPI communication.

[0057] See also Figure 2 , Figure 2 1 is a connection diagram of a switch board with dual input interfaces for USB and PS / 2 external devices provided in an embodiment of the present application. Figure 2 As shown,

[0058] The switch board can be connected to an external display screen, USB and PS / 2 keyboards, and USB and PS / 2 mice, and can be connected to several external devices through the VGA interface, and the main control module can be connected to the cascade control module through a communication line, and more external devices can be connected through the cascade control module.

[0059] After the device is connected, the operator can switch the external device to be controlled through the USB and PS / 2 keyboard and USB and PS / 2 mouse, or the OSD module connected to the main control module to operate. For the specific operation process, please refer to Figure 3 , Figure 3 1 is a flow chart of switching control of external devices provided in an embodiment of the present application. Figure 3 As shown, the process includes: step 101 to step 113.

[0060] Step 101: Power on the KVM switch.

[0061] Step 102: Determine whether an external device signal is connected.

[0062] If the external input module is connected to an external device, it is determined whether the external device signal is connected.

[0063] If an external device signal is connected, step 104 and step 105 are executed; if no external device signal is connected, step 103 is executed.

[0064] Step 103: The relevant modules continue to detect.

[0065] Step 103: The main control receives the USB or PS / 2 external device signal through the USB / PS / 2 simulation module.

[0066] Specifically, the main control module receives the USB or PS / 2 external device signal through the USB analog module or the PS / 2 analog module in the external video signal switching module.

[0067] Step 105: The main control receives the VGA signal of the external device through the external video signal switching module.

[0068] Specifically, the main control module receives the VGA signal sent by the external device through the external video signal switching module.

[0069] Step 106: Output the received external device VGA signal to the KVM display screen for display, and output the received USB / PS / 2 signal to the user's keyboard and mouse operation terminal.

[0070] Specifically, the received VGA signal of the external device is output to the above-mentioned display module to be displayed on a display screen connected to the display module.

[0071] In some implementations, after the received USB / PS / 2 signal is output to the user keyboard and mouse operation terminal, the method further includes: receiving a feedback signal sent by the user keyboard and mouse operation terminal.

[0072] Specifically, the main control module sends the received USB signal or PS / 2 signal sent by the external device to the user's keyboard and mouse terminal, that is, the attached Figure 1 The user input port 3, the user keyboard and mouse operation terminal outputs a feedback signal, which is processed by the main control module to further control the switching of external input devices at different ports.

[0073] Whether the received signal is a USB signal or a PS / 2 signal depends on whether the external device is a PS / 2 device or a USB device.

[0074] Step 107: Use OSD hotkeys, keyboard and mouse operations to switch displays and control other devices.

[0075] Specifically, the OSD hot key in the above-mentioned OSD module, or the keyboard or mouse connected to the input port in the above-mentioned user input module, is used to switch the content displayed on the display screen connected to the display module.

[0076] For example, the displayed content is switched from the content of external device A connected to port A to the content of external device B connected to port B.

[0077] Step 108: Check whether the switched port is connected to a device.

[0078] Specifically, it is determined whether the switched port is connected to an external device.

[0079] If the switched port is not connected to an external device, step 109 and step 110 are executed.

[0080] If the switched port is connected to an external device, step 111 and step 112 are executed.

[0081] Step 109: No video signal is transmitted and the screen is black and has no display.

[0082] Specifically, if the switched port is not connected to an external device, the content displayed on the display screen connected to the display module is a black screen.

[0083] Step 110: Use the OSD hotkey or keyboard and mouse operations to switch back to the port with a signal source.

[0084] Specifically, the user uses the OSD hot key in the above-mentioned OSD module, or the keyboard or mouse connected to the input port in the above-mentioned user input module, to switch back to the port with the signal source, that is, the port connected to the external device.

[0085] Step 111: The main control sends USB / PS / 2 keyboard and mouse signals.

[0086] Specifically, the user's keyboard and mouse operation terminal feeds back the external input device signals and external video signals transmitted by the main control module, processes the data through the main control module, sends USB / PS / 2 keyboard and mouse signals to the external input device, and then performs switching control of external input devices of different ports.

[0087] Step 112: The main control receives the switched external device VGA signal through the external video signal switching module.

[0088] Step 113: Determine whether the switching is successful.

[0089] If the switching is successful, the operation ends; if the switching fails, the process returns to step 102 .

[0090] In summary, the present application provides a switching board with dual input interfaces for USB and PS / 2 external devices, the switching board comprising: a PCB circuit board; the PCB circuit board is integrated with a main control module, a user input module, at least one cascade control module, and at least two groups of external input modules; wherein the user input module comprises at least one input port, and the input port supports connecting USB devices and PS / 2 devices; each group of the external input modules comprises at least one external video signal switching module and at least one external device input module, and the external device input module supports connecting USB devices and PS / 2 devices; the main control module is connected to a group of the external input modules, and the cascade control module is connected to a group of the external input modules. The present application can switch and control external PS / 2 devices and external USB devices connected to the switching board through a single switching board, providing centralized control and management for information technology equipment in a data center.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A switch board with dual input interfaces for USB and PS / 2 external devices, characterized in that: The switching board comprises: a PCB circuit board; The PCB circuit board is integrated with a main control module, a user input module, at least one cascade control module, and at least two groups of external input modules; wherein, The user input module includes at least one input port, and the input port supports connecting a USB device and a PS / 2 device; Each group of the external input modules includes at least one external video signal switching module and at least one external device input module, and the external device input module supports connecting USB devices and PS / 2 devices; The main control module is connected to a group of the external input modules, and the cascade control module is connected to a group of the external input modules.

2. The switch board according to claim 1, characterized in that: The main control module includes a main control chip and a switching circuit.

3. The switching board according to claim 2, characterized in that: The main control chip in the main control module changes the external device currently selected by the switching board through the switching circuit.

4. The switching board according to claim 1, characterized in that: One of the external video signal switching modules and one of the external device input modules share one interface, and each of the interfaces is connected to one external device.

5. The switching board according to claim 4, characterized in that: The switch board also includes: Display module; The display module is used to connect to a display screen to display the device screen of the external device currently selected by the switch board.

6. The switching board according to claim 5, characterized in that: The USB device or PS / 2 device connected to the input port of the user input module is used to change the external device currently selected by the switch board to change the device screen displayed on the display screen connected to the display module.

7. The switching board according to claim 5, characterized in that: The switch board also includes: An OSD module, wherein the OSD module includes an OSD hot key, and the OSD hot key is used to change the external device currently selected by the switching board to change the device screen displayed on the display screen connected to the display module.

8. The switching board according to claim 1, characterized in that: The switching board also includes a power module; The power supply module is used to convert 220V voltage into 5V voltage and 3.3V voltage through a power adapter. The 5V voltage is supplied to the user input module, and the 3.3V voltage is supplied to the main control module, the cascade control module, and each group of external input modules.

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