KVM multi-host read-write protection system

Abstract

The utility model discloses a KVM (Keyboard Video Mouse) multi-host read-write protection system, which comprises a storage module, at least two input devices and a data interface, and further comprises a data module connected with the input devices; the signal switching logic module is connected with a downlink port of the data module, and the downlink port of the signal switching logic module is connected with a plurality of data interfaces; the read-write monitoring module is connected with the data module; the read-write protection module is respectively connected with the storage module, the read-write monitoring module and the signal switching logic module and realizes communication with the storage module, the read-write monitoring module and the signal switching logic module; and the power supply control module is connected with the read-write protection module, and when the data module switches the host equipment and the read-write monitoring module detects that the equipment connected with the data interface or the storage module is performing read-write operation, the power supply control module controls the read-write protection module to feed back a signal that the host equipment is not allowed to be switched. And the host is allowed to be switched until reading and writing of the equipment or the storage module connected with the data interface are completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit technical field, concretely is a KVM multihost read-write protection system. BACKGROUND

[0002] KVM is the English abbreviation of keyboard (Keyboard), video display (Video), mouse (Mouse), that is, allowing users to switch through the KVM connected network port, keyboard, display and mouse between multiple different operating systems of multiple host computers, realizing that a set of keyboard, network port, display and mouse are used to access and control 2, 3, 4, 5 or even more than 4096 computer hosts, and the switching mode can be operated through keys, remote control, keyboard, hot key and screen menu.

[0003] With the progress of science and technology, people's requirements for data storage and transmission methods are increasing, and not only file transmission is required, but also data security and storage device security are required. Although the KVM product can synchronize the operation of N host characteristics, the existing KVM product does not have the function of monitoring the storage interface state and protecting the data and storage device safety at the same time, so if the KVM product suddenly switches the input device of the data input end, the data transmission operation in the KVM product will be interrupted, resulting in data loss of the data interface device or the storage device in the KVM product, and even causing damage to the data interface connected device or the storage device in the KVM product. UTILITY MODEL CONTENT

[0004] In view of the technical defects in the background art, the utility model provides a KVM multihost read-write protection system, which solves the above technical problems and meets the actual needs, and the specific technical scheme is as follows:

[0005] The utility model discloses a kind of KVM multihost read-write protection system, the read-write protection system includes data module, storage module, at least two input devices and data interface, further include:

[0006] Data module is connected with input device and carries out the distribution and management of signal to input device identification;

[0007] Signal switching logic module is connected with the downstream port of data module, and its downstream port is connected with several data interfaces, and the signal switching logic module is used to communicate with corresponding input device according to control signal, obtains the signal output by the input device and judges signal to obtain a plurality of different types of communication signals;

[0008] Read-write monitoring module is connected with the data module, and monitors the signal switching action of input device by the data module;

[0009] A read-write protection module is connected with and communicates with the storage module, the read-write monitoring module and the signal switching logic module;

[0010] A power supply control module is connected with the read-write protection module and is used for controlling the communication connection between the corresponding power receiving unit and the power supply according to the control signal.

[0011] As a further embodiment of the utility model, the data module comprises at least two USB interfaces and a first HUB controller, the USB interfaces are connected with input devices for data transmission, the first HUB controller is connected with the downstream port of the USB interface, the first HUB controller is connected with the signal switching logic module for data transmission, and the read-write monitoring module is connected with the first HUB controller and detects the signal switching action of the input device of the first HUB controller.

[0012] As a further embodiment of the utility model, the read-write monitoring module, the read-write protection module and the power supply control module all comprise an MCU, and the MCU in the read-write monitoring module is connected with the data module to realize signal transmission.

[0013] As a further embodiment of the utility model, the read-write protection module further comprises a second HUB controller, the MCU and the data module transmit signals in a bidirectional communication mode, the MCU is connected with the second HUB controller to realize signal transmission, and the second HUB controller is arranged on the communication line between the signal switching logic module and the data interface.

[0014] As a further embodiment of the utility model, the power supply control module further comprises a power supply device, and the power supply device is electrically connected with the MCU and the second HUB controller.

[0015] The utility model discloses beneficial effects are: in the process of KVM multi-host connection data transmission, when needing switching the signal of one input device connected with the data module to another input device, the read-write monitoring module detects that the device connected with the data interface or the storage module is operating, then will control the read-write protection module to carry out the feedback of not allowing the data module to switch the host device signal, and through the power supply control module, the power transmission between the corresponding power receiving unit and the power supply unit is controlled, until the device connected with the data interface or the storage module reads and writes to allow the data module to switch the host device signal, so that the safety of data and storage device can be guaranteed while transmitting data, prevent the data loss or storage equipment damage caused by the sudden interruption of data in the transmission process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1It is a module principle diagram of the read-write protection system.

[0017] Figure 2 It is a component composition diagram of the read-write protection system.

[0018] In the figure, 1, data module; 11, USB interface; 12, first HUB controller; 2, storage module; 3, input device; 4, data interface; 5, signal switching logic module; 6, read-write monitoring module; 7, read-write protection module; 71, second HUB controller; 8, power control module; 81, power supply device; 9, MCU. DETAILED DESCRIPTION

[0019] The utility model discloses a KVM multi-host read-write protection system, such as Figure 1 and Figure 2 Combination shows, the read-write protection system includes data module 1, storage module 2, at least two input devices 3 and data interface 4, still includes:

[0020] Data module 1 is connected with input device 3 and carries out the distribution and management of signal to input device 3 for identification;

[0021] Signal switching logic module 5 is connected with the downstream port of data module 1, and its downstream port is connected with several data interfaces 4, and the signal switching logic module 5 is used to be connected with corresponding input device 3 according to control signal and communication, obtains the signal output by input device 3 and judges signal to obtain a variety of different types of communication signals;

[0022] Read-write monitoring module 6 is connected with data module 1, and the signal switching action of input device 3 of data module 1 is monitored;

[0023] Read-write protection module 7 is connected with storage module 2, read-write monitoring module 6 and signal switching logic module 5 respectively and realizes communication;

[0024] Power control module 8 is connected with read-write protection module 7, and is used to control the communication connection between corresponding power supply unit and power according to control signal.

[0025] It should be noted that: data module 1 can be connected with more than two input devices 3, and the input device 3 transmits data to the device connected to the KVM data interface 4 or to the storage module 2 in the KVM through the data module 1, and the process involves reading and writing operations of data; when the signal of the input device 3 connected to the data module 1 needs to be switched to another input device 3, the signal access operation of the connected input device 3 is controlled by sending a signal to the data module 1, and when the read-write monitoring module 6 detects that the device connected to the data interface 4 or the storage module 2 is performing a read-write operation, the read-write protection module 7 will control the feedback of the signal of the data module 1 to switch the host device signal, and the power control module 8 controls the power transmission between the corresponding power receiving unit and the power supply unit, until the data interface 4 The connected device or the storage module 2 reads and writes, and then allows the data module 1 to switch the host device signal, so that the safety of the data and the storage device can be ensured while transmitting the data, and the data loss or storage device damage caused by sudden interruption of data transmission can be prevented.

[0026] It should be further pointed out that, as shown in Figure 2 , the data module 1 includes at least two USB interfaces 11 and a first HUB controller 12, the USB interface 11 is connected with the input device 3 for data transmission, the first HUB controller 12 is connected with the downstream port of the USB interface 11, the first HUB controller 12 is connected with the signal switching logic module 5 for data transmission, and the read-write monitoring module 6 is connected with the first HUB controller 12 and detects the signal switching action of the input device 3 of the first HUB controller 12.

[0027] Among them, the input device 3 is connected to the USB interface 11 for data transmission to the KVM, and the first HUB controller 12 is used for signal distribution when the input device 3 connected to the USB interface 11 inputs data to the KVM, that is, the operation of controlling the signal switching of the input device 3 is controlled by the first HUB controller 12; In addition, different data type interfaces such as video data interface and audio data interface can be connected to the first HUB controller 12, so as to realize the conversion of different types of data by the KVM, thereby realizing the simultaneous control of multiple different types of devices.

[0028] It should be further pointed out that, as shown in Figure 2 , the read-write monitoring module 6, the read-write protection module 7 and the power control module 8 all include an MCU 9, and the MCU 9 in the read-write monitoring module 6 is connected with the data module 1 to realize signal transmission.

[0029] The MCU 9 can detect the input device 3 currently performing signal input operation and the switching operation of the input device 3 in the read-write monitoring module 6. When the MCU 9 detects that the input device 3 currently performing signal input operation does not complete data transmission operation and the first HUB controller 12 in the data module 1 receives the control instruction of the input device 3 switching, the MCU 9 intervenes in the control of the read-write protection module 7 and the power control module 8 to realize the feedback of the signal data module 1 not being allowed to switch the host device signal and control the power transmission between the corresponding power receiving unit and the power supply unit.

[0030] Specifically, as shown in Figure 2 The read-write protection module 7 further includes a second HUB controller 71. The MCU 9 and the data module 1 transmit signals in a bidirectional communication manner. The MCU 9 is connected with the second HUB controller 71 to realize signal transmission. The second HUB controller 71 is arranged on the communication line between the signal switching logic module 5 and the data interface 4.

[0031] After the MCU 9 intervenes in the read-write protection module 7, the data transmission of the switched input device 3 to the target second HUB controller 71 is disconnected. Only the normal data transmission of the input device 3 currently performing data read-write operation to the target second HUB controller 71 or the normal data transmission of the storage module currently performing data read-write operation to the storage module is reserved. Thus, the device connected to the data interface 4 currently performing data read-write operation or the storage module currently performing data read-write operation is protected.

[0032] More specifically, as shown in Figure 2 The power control module 8 further includes a power supply device 81. The power supply device 81 is electrically connected with the MCU 9 and the second HUB controller 71 respectively.

[0033] After the MCU 9 intervenes in the power control module 8, all the second HUB controllers 71 except the second HUB controller 71 connected with the data interface 4 currently performing data transmission or the storage module are powered off by the MCU 9. Thus, the device connected to the data interface 4 currently performing data read-write operation or the storage module currently performing data read-write operation is protected.

[0034] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. The description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A KVM multi-host read-write protection system, the read-write protection system comprising a storage module, at least two input devices and a data interface, characterized in that, Also include: Data module, with the input device is connected and the input device identification signal distribution and management; Signal switching logic module, with the data module downstream and its downstream connected with several data interfaces, the signal switching logic module is used for according to control signal and corresponding input device communication connection, obtains the signal output by the input device and judges the signal to obtain a variety of different types of communication signal; Read-write monitoring module, connected with the data module, and the signal switching action of the data module to the input device is monitored; Read-write protection module, respectively with the storage module, read-write monitoring module and signal switching logic module connection and communication; Power control module, connected with the read-write protection module, for controlling the communication connection between the corresponding power supply unit and power according to the control signal.

2. The read-write protection system of claim 1, wherein, The data module includes at least two USB interfaces and a first HUB controller, the USB interface is connected with the input device to transmit data, the first HUB controller is connected with the downstream of USB interface, the first HUB controller is connected with the signal switching logic module to transmit data, the read-write monitoring module is connected with the first HUB controller, and the signal action of the first HUB controller switching input device is detected.

3. The read-write protection system of claim 1, wherein, The read-write monitoring module, read-write protection module and power control module all include MCU, the MCU in the read-write monitoring module is connected with the data module to realize signal transmission.

4. The read-write protection system of claim 3, wherein, The read-write protection module further includes a second HUB controller, the MCU and the data module are connected by means of bidirectional communication to transfer signals, the MCU is connected with the second HUB controller to realize signal transmission, and the second HUB controller is arranged on the communication line between the signal switching logic module and the data interface.

5. The read-write protection system of claim 4, wherein, The power control module further includes a power device, and the power device is electrically connected with the MCU and the second HUB controller respectively.

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