TWI489282B - Controlling device and method thereof - Google Patents

Description

Control device and method thereof

The present invention relates to a control device, and more particularly to a control device having a first and a second control module.

The KVM is a hardware device that allows users to control multiple computers from a set of keyboards, screens and mice. Although multiple computers are connected to the KVM, usually only a small number of computers can be controlled at any one time. Today's KVM also adds the ability to share universal serial bus (USB) and microphones with multiple computers. Some KVMs have a reverse function, that is, a single computer can be connected to multiple sets of screens, keyboards, and mice. Although not as common as the former, users want to access data from a computer from two or more locations. This configuration is very useful. The current trend in the use of the four-inch KVM is to allow computers to exchange data between each other through the USB interface. However, the bottleneck encountered is: in implementation, if the micro control unit (MCU) moves data for any two USB control devices, the speed is very slow, for example, the memory unit of a USB control device. The memory unit of another USB control device is continuously read and written, but its performance is still not as fast as a single chip. In addition, there are currently no more than two USB devices for data transfer applications. Therefore, the improvement of the application of the above KVM to exchange data between computers through the USB interface, and how to use the four KVM to carry out data transfer between more than two USB devices is worthy of our consideration and improvement.

As a result of the job, the inventor, in view of the lack of prior art, thought of and improved the idea of invention, and finally invented the "control device and method" of the case.

One of the objectives of the present invention is to provide a control device such that an application specific integrated circuit (ASIC) having two control units has a communication interface, so that ASICs can be daisy chained or can be connected in parallel and utilize " Switching the memory interface so that the two control units share the technology of each ASIC, then the two ASICs can be used for four KVM applications (including file transfer: virtual transfer control: VNC, etc.).

Another purpose of the present invention is to make a setting by the MCU, and the memory interface controlled by the endpoint of each control unit in the control device can be switched differently, and the MCU can read/write each control through different switching. The memory of the unit can also be read/written by the serialized output/input to the memory of the control unit in other ASICs.

Another object of the present invention is to provide a control device including a first memory unit, a first unit, including a first end point and a second end point, a second memory unit, and a second control unit. The first memory unit and the second memory unit are coupled to the first memory unit and the second memory unit, wherein the first memory unit and the second memory unit are the first and the first The second control unit is configured to control the data transmission direction between the first control unit and the second control unit, so that the first control unit transmits the data to the first memory unit through the first end point. And the second control unit transmits the data from the first memory unit through the third endpoint.

According to the above concept, the second control unit transmits the data to the second memory unit through the third terminal, and the first control unit transmits the first end Point incoming data from the second memory unit.

According to the above concept, the first memory unit further has a first interface, the first interface can be coupled to the first control unit or coupled to the second control unit, and the second memory unit has a first And a second interface, the second interface can be coupled to the first control unit or coupled to the second control unit via a switch.

According to the above concept, the device further includes a micro control unit coupled to the mapping unit, wherein the first interface and the second interface are in the first and the second interface by the operation of the micro control unit and the mapping unit Different switching is performed between the second control units.

According to the above concept, the device further includes at least one switching unit coupled to the first control unit, the second control unit, and the mapping unit, respectively, for performing between the first control unit and the second control unit. Data transmission.

According to the above concept, each of the first and second memory units is a first-in first-out memory or a buffer.

According to the above concept, the device is disposed in an application specific integrated circuit.

According to the above concept, the first control unit and the second control unit are universal sequence bus control units.

The purpose of the present invention is to provide a control device, including a first control module, including a first memory unit and a first transmission unit, the first control module can access the data of the first memory unit, and a second control module includes a second memory unit and a second transmission unit, wherein the second control module can access data of the second memory unit, wherein the second transmission power is Connected to the first transmission port, so that the first control module can also access the data of the second memory unit.

According to the above concept, the first control module further includes a switching unit coupled to the first transmission port for data transmission between the first transmission port and the second transmission port.

According to the above concept, the first control module and the second control module are respectively coupled to at least one computer host, and control the keyboard-screen-mouse signal and the at least one file to be transmitted to one of the computer hosts.

According to the above concept, the first transmission port and the second transmission port are output/input transmission ports.

According to the above concept, the first transmission port is an output transmission port, and the second transmission port is an input transmission port.

According to the above concept, the device further includes a third control module, which includes a third memory unit and a third transmission port, wherein the third transmission port is an output port, wherein the first control module further includes A fourth transmission port is an input transmission port and is electrically connected to the third transmission port, so that the third control module can access one of the second memory units.

According to the above concept, each of the first and second memory units is a first-in first-out memory or a buffer.

According to the above concept, the electrical connection between the second transmission port and the first transmission port is through a series of bus bars.

According to the above concept, the tandem bus bar is a high speed sequence bus bar or a parallel bus bar.

According to the above concept, the tandem busbar is operated in both directions and is transmitted through A micro control unit sets its direction.

According to the above concept, each of the first and second control modules includes a mapping unit, a first memory unit, a first control unit, a second memory unit, and a second control unit. The first control unit The first control unit includes a third endpoint and a fourth endpoint, and wherein the first memory unit and the second memory unit are the first and the second The second control unit is configured to control the data transmission direction between the first control unit and the second control unit, so that the first control unit transmits the data to the first memory unit through the first end point. And the second control unit transmits the data from the first memory unit through the third endpoint.

According to the above concept, the second memory unit is shared by the first and the second control unit, and the second control unit transmits data to the second memory unit through the third terminal, and the first control unit Data is transmitted from the second memory unit through the first endpoint.

According to the above concept, each of the first and second control modules further includes at least one switching unit, respectively coupled to the first control unit, the second control unit, and the mapping unit, for the first control Data transmission is performed between the unit and the second control unit.

According to the above concept, the first control module and the second control module are respectively disposed in an application specific integrated circuit.

According to the above concept, the first control unit and the second control unit are universal sequence bus control units.

A further object of the present invention is to provide a control method for a control device, comprising the steps of: (a) providing a mapping unit, a first memory a unit, a first control unit including a first endpoint and a second endpoint, a second memory unit, and a second control unit including a third endpoint and a fourth endpoint; (b) controlling The data transmission direction between the first control unit and the second control unit causes the first control unit to transmit data to the first memory unit through the first terminal, and the second control unit transmits the first control unit Transmitting data from the first memory unit; and (c) causing the first control unit to transmit data from the second memory unit through the first endpoint, and causing the second control unit to pass the third The endpoint transmits the data to the second memory unit.

According to the above concept, the first memory unit further has a first interface, the second memory unit further has a second interface, and the step (b) further includes a step when the first control unit transmits the data to the first When the memory unit is switched, the first memory unit is coupled to the first control unit by one of the first interfaces, and the first control unit transmits the data from the first memory unit through the first interface. The switching, the first memory unit is coupled to the second control unit, and the step (c) further comprises a step (c1), when the first control unit transmits data from the second memory unit, Switching one of the second interfaces to couple the second memory unit to the first control unit, and when the second control unit transmits data to the second memory unit, the switching through the second interface causes the second A memory unit is coupled to the second control unit.

Another object of the present invention is to provide a control method for a control device, comprising the following steps: (a) providing a first control module including a first memory unit and a first transmission unit, and a first Two memory units and a second control module of the second transmission port, wherein the second transmission port is electrically connected to the first transmission port; and (b) the first control module accesses the data of the second memory unit.

According to the above concept, the first control module and the second control module are respectively coupled to at least one computer host, and further includes a step (c) of respectively making the first control module and the second control module respectively Control a keyboard-screen-mouse signal and transfer at least one file to one of the computer hosts.

According to the above concept, the device further includes a third control module including a third memory unit and a third transmission port for output transmission, the first control module further including a fourth for input transmission And transmitting the fourth transmission port to the third transmission port, further comprising a step (c) of causing the third control module to access one of the second memory units.

The above described objects, features, and advantages of the present invention will become more apparent and understood.

Please refer to the first figure, which is a schematic structural diagram of a first control module of a control device according to a first preferred embodiment of the present invention. In this embodiment, the general-purpose serial bus (USB) is used for the implementation. However, the present invention is not limited thereto. Others such as 1394, parallel bus or other types of interfaces may also be applied to the embodiments of the present invention. , will not repeat them below. The first USB control module 21 (which is a USB control device) includes a first USB control unit 211, a first memory unit 212, a mapping unit 213, a micro control unit 214, and a second USB control unit 215. a second memory unit 216. In this embodiment, the first memory unit 212 The second memory unit 216 is a first-in-first-out memory (FIFO), which is labeled as FIFO A and FIFO B in the figure. In other embodiments, the first memory unit 212 and the second memory unit 216 may also be A buffer or other form of memory, and the mapping unit 213 of the embodiment is a register map, which is a logic circuit between the first USB control unit 211 and the second USB control unit 215. Data transmission direction. In the first figure, the first USB control unit 211 is connected to the computer PC #1, and the second USB control unit 215 is connected to the computer PC #2. The first memory unit 212 has a first interface 2121 and is shared by the first USB control unit 211 and the second USB control unit 215. The first USB control unit 211 transmits the data to the first memory unit 212 (write FIFO A) through a first endpoint 2111, and the second USB control unit 215 transmits the data from the first memory unit 212 through a third endpoint 2151. Data (read FIFO A). Similarly, the second memory unit 216 has a second interface 2161 and is shared by the first USB control unit 211 and the second USB control unit 215. The second USB control unit 215 transmits the data to the second memory unit 216 (write FIFO B) through the third terminal 2151, and the first USB control unit 211 is transmitted from the second memory unit 216 through the first terminal 2111. Data (read FIFO B).

In this embodiment, the first interface 2121 can be coupled to the first USB control unit 211 via switching to enable the first memory unit 212 to be used by the first USB control unit 211 or coupled to the second USB control unit 215. The first memory unit 212 is used by the second USB control unit 215. The second memory unit 216 further has a second interface 2161. The second interface 2161 can be coupled to the first USB control unit 211 to enable the second memory unit. 216 is used by the first USB control unit 211 or coupled to the second USB control unit 215 to cause the second memory unit 216 to be used by the second USB control unit 215. In addition, in this embodiment, the mapping unit 213 is coupled to the micro control unit 214 and the first and second memory units 212, 216, and transmits the micro control unit 214 and the mapping unit 213, so that the first interface 2121 can be The second interface 2161 performs different switching between the first and second USB control units 211 and 215.

The second figure shows a schematic diagram of the architecture of a USB control device in accordance with a first preferred embodiment of the present invention. The USB control device 2 includes a first USB control module 21 and a second USB control module 22, wherein the first USB control module 21 includes a first USB control unit 211, a first memory unit 212, and a mapping unit. 213. A micro control unit 214, a second USB control unit 215, and a second memory unit 216. The second USB control module 22 includes a first USB control unit 221, a first memory unit 222, a mapping unit 223, a micro control unit 224, a second USB control unit 225, and a second memory unit 226. In this embodiment, the first USB control module 21 can be fabricated as an application specific integrated circuit (ASIC), and the second USB control module 22 can be fabricated as another ASIC. The first USB control module 21 can utilize a first transmission port, such as: an input/output port (eg, CO1) in the embodiment is electrically connected to the second ASIC of the other ASIC in which the second USB control module 22 is located. The transmission port, such as an input/output port (for example, CI2), allows the first USB control module 21 to access the memory in another ASIC where the second USB control module 22 is located, or to make the second USB control module Another ASIC in which 22 is located accesses the ASIC in which the first USB control module 21 is located Memory. The first transmission port and the second transmission port are electrically connected through a series of bus bars, and may be a high speed serial bus bar or a parallel bus bar, the serial bus bar is bidirectionally operated, and In the present embodiment, the data transmission direction is set by the micro control unit 224.

In this embodiment, the first USB control module 21 and the second USB control module 22 are respectively coupled to at least one computer host. For example, the first USB control module 21 is coupled to the PC#1 and the PC#. 2. The second USB control module 22 is coupled to the PC#3 and the PC#4, and controls the keyboard-screen-mouse signal and the at least one file to be transmitted to one of the computer hosts.

In addition, the first transmission port and the second transmission port may also be corresponding transmission direction settings, such as: the first transmission port is an output transmission port, the second transmission port is an input transmission port, or the first transmission port is an input transmission port. The second transmission port is set in the manner of output transmission port.

The third figure shows a schematic diagram of the architecture of a first USB control module of a USB control device according to a second preferred embodiment of the present invention. The first USB control module 31 (which is a USB control device) includes a first USB control unit 311, a first memory unit 312 (FIFO A), a mapping unit 313, a micro control unit 314, and a second USB. The control unit 315, a second memory unit 316 (FIFO B), at least one switching unit, such as: first to fifth switches 317-321 (wherein the first to fourth switches are each a pair of 3 switches, and the The 5 switches are a 1-to-5 switch), an input/output port 322, a third memory unit 323 (FIFO C), and a fourth memory unit 324 (FIFO D). In this embodiment, the first to fourth memory units 312, 316, 323, and 324 are respectively a first-in first-out memory, and are respectively labeled as FIFOs in the figure. A, FIFO B, FIFO C and FIFO D, and this embodiment takes five switches 317-321 as an example. In other embodiments, the first to fourth memory units 312, 316, 323, 324 may be in other forms. The number of the switching units is not limited to five. For example, the first USB control unit 311, the second USB control unit 315, and the mapping unit 313 are coupled to each other by a switching unit to achieve data transmission between the control units. . In addition, it is coupled to the first transmission port 322 by a switching unit for data transmission between the first transmission port 322 and a second transmission port (not shown) of another USB control module. The form of the switching unit is not limited to the one pair of 3 or the pair of 5 switches. The other components, such as an analog switch, a digital switch, etc., are applicable, and are not described herein. In the third figure, the first USB control unit 311 is connected to the computer PC#1 and has a first endpoint 311A and a second endpoint 311B, and the second USB control unit 315 is connected to the computer PC#2, and There is a third endpoint 315A and a fourth endpoint 315B. The micro control unit 314 is used for program control, which outputs a signal to the mapping unit 313, and the mapping unit 313 is used to control which of the first to fifth switches 317-321 is switched to and via the third memory unit 323 (FIFO). C) communicating with a fourth memory unit 324 (FIFO D) with the first USB control unit 311 and the second USB control unit 315, and the like. The first memory unit 312 is shared by the first USB control unit 311 and the second USB control unit 315. Similarly, the second memory unit 316 can also be shared by the first USB control unit 311 and the second USB control unit 315. For example, at path 1, the data of PC#1 is read and sent to PC#2, which passes through the first USB control unit 311, the first endpoint A (311A), the first switch 317, and the third switch 319. , The second memory unit 316, the second end point B (315B) and the second USB control unit 315. In the case of the path 2, the data of the computer PC#2 is written into the computer PC#1 via the second USB control unit 315, the second terminal A (315A), the second switch 318, the fourth switch 320, and the first memory. The unit 312, the first end point B (311B) and the first USB control unit 311. When the path is 3, the computer PC#1 can be connected to the next USB control through the first USB control unit 311, the first terminal A (311A), the first switch 317, the fifth switch 321, and the input/output port 322. Module.

In addition, the mapping unit 313 can also control the state of the switching unit of the switching unit, so that the computer PC#1 communicates with the micro control unit 314 through the first switch 317, the FIFO C, and the mapping unit 313, so that the computer PC#2 passes through the second switch. 318, the FIFO D, the mapping unit 313 and the micro control unit 314, and the computer PC#1 and the computer PC#2 can be transmitted from another USB control module through the fifth switch 321, the input/output port 322 or Output data.

The fourth figure shows a circuit diagram of a USB control device in accordance with a third preferred embodiment of the present invention. The USB control device 3 includes a first USB control module 31 (1st), a second USB control module 32 (2nd) and a third USB control module 33 (3rd). The first USB control module 31 can be connected to the output 埠CO2 of the second USB control module 32 using its input 埠CI1, and connected to the input 埠CI3 of the third USB control module 33 using its output 埠CO1. (The third USB control module 33 has an output 埠CO3), and the second USB control module 32 can access the memory of the third USB control module 33 through the first USB control module 31. Or let the third USB control module 33 access the second USB control The memory of the module 32.

The fifth figure shows a circuit diagram of a USB control device in accordance with a fourth preferred embodiment of the present invention. The USB control device 4 includes a first USB control device 41 (1st), a second USB control device 42 (2nd) and a third USB control device 43 (3rd). Each of the USB control devices 41, 42 and 43 is also a USB control module. Wherein the first USB control device 41 can be connected to the output/input CIO2 of the second USB control device 42 using its output/input CIO1, and to the output/input CIO3 of the third USB control device 43; The control device 41 can access the memory of the second USB control device 42 or enable the second USB control device 42 to access the memory of the first USB control device 41. The first USB control device 41 can also be used to make the second The USB control device 42 accesses the memory of the third USB control device 43, or causes the third USB control device 43 to access the memory of the second USB control device 42.

The memory referred to in the present invention may be a FIFO memory, a buffer or other form of memory.

FIG. 6 is a circuit diagram showing a circuit between a first USB control module and a second USB control module electrically connected by a series of bus bars and a parallel bus bar according to the first preferred embodiment of the present invention. . The first USB control module 21 can be fabricated as a chip ASIC #1, and the second USB control module 22 can be fabricated as a chip ASIC #2. The first USB control module 21 includes a first memory unit 212 and a parallel to sequence conversion device (P2S) 217, and the second USB control module 22 includes a first USB control unit 221 and a sequence to parallel conversion device ( S2P) 227. Two-chip ASIC#1 It can communicate with ASIC#2 through a parallel bus (for example, the sixth figure shows a parallel bus with 80ns for each read and write), or you can use the serial bus to communicate (for example, in the sixth The figure shows a high-speed sequence bus that requires 10 ns per read and write).

In summary, when the present invention is implemented by an ASIC, a control device can be provided, so that an ASIC having two control units has a communication interface, so that the ASICs can be mutually connected, or can be connected in parallel, and utilize "switching. The interface of the memory is shared by the two control units. The two ASICs can be used for four KVM applications (including file transfer and VNC). Since the memory of different control devices can be swapped and the control devices can be connected in series, it is indeed novel; and because the data transmission of the control device is fast, and the control device can be connected in series, the expansion is good. Therefore, it is novel, and because the control device can be fabricated on the second ASIC, and the two ASICs can be connected in series to become a KVM with a lower BOM cost, it is even better. Industrial utilization.

Therefore, even though the present invention has been described in detail by the above-described embodiments, it can be modified by those skilled in the art, and is not intended to be protected as claimed.

2,3,4‧‧‧USB control device

21,31‧‧‧First USB Control Module

211,221,311‧‧‧First USB Control Unit

2111, 2211, 311A‧‧‧ first endpoint

2112, 311B‧‧‧ second endpoint

212,222,312‧‧‧First memory unit

2121‧‧‧ first interface

213,223,313‧‧‧ mapping unit

214,224,314‧‧‧Micro Control Unit

215,225,315‧‧‧second USB control unit

2151, 2251, 315A‧‧‧ third endpoint

2152, 315B‧‧‧ fourth endpoint

216,226,316‧‧‧second memory unit

2161‧‧‧second interface

217‧‧‧Parallel to sequence conversion device

22,32‧‧‧Second USB Control Module

227‧‧‧Sequence to Parallel Conversion Unit

317‧‧‧First switch

318‧‧‧second switch

319‧‧‧third switch

320‧‧‧fourth switch

321‧‧‧ fifth switch

322‧‧‧Input/Output埠

323‧‧‧ third memory unit

324‧‧‧fourth memory unit

33‧‧‧ Third USB Control Module

41,42,43‧‧‧USB control unit

The first figure shows a schematic diagram of a first control module of a control device according to a first preferred embodiment of the present invention; the second figure shows a first comparison according to the concept of the present invention. Schematic diagram of a control device of a preferred embodiment; third diagram: showing a second preferred embodiment in accordance with the inventive concept Schematic diagram of a first control module of a control device; fourth diagram: showing a circuit diagram of a control device according to a third preferred embodiment of the present invention; fifth figure: showing a basis A schematic diagram of a control device of a fourth preferred embodiment of the present invention; and a sixth diagram showing a first control module and a second control in accordance with a first preferred embodiment of the present invention A schematic diagram of a circuit in which a series of bus bars and a parallel bus bar are electrically connected between modules.

2‧‧‧USB control device

21‧‧‧First USB Control Module

211,221‧‧‧First USB Control Unit

2111, 2211‧‧‧ first endpoint

212, 222‧‧‧ first memory unit

213,223‧‧‧ mapping unit

214,224‧‧‧Micro Control Unit

215, 225‧‧‧Second USB Control Unit

2151, 2251‧‧‧ third endpoint

216,226‧‧‧Second memory unit

22‧‧‧Second USB Control Module

Claims (18)

A control device includes: a first control module, including a first memory unit and a second memory unit, a first memory module, a first mapping unit, a first control unit, and a second control And the first control module can access the data of the first memory module, the first control unit includes a first endpoint and a second endpoint, and the second control unit includes a third endpoint and a fourth endpoint, and wherein the first memory unit is shared by the first and the second control unit, the mapping unit can control between the first control unit and the second control unit The data transmission direction is such that the first control unit transmits data to the first memory unit through the first endpoint, and the second control unit transmits data from the first memory unit through the third endpoint; a second control module includes a third memory unit and a fourth memory unit, a second memory module, a second mapping unit, a third control unit, a fourth control unit, and a second transmission Oh, the second control module can Taking the data of the second memory module, wherein the second transmission unit is electrically connected to the first transmission unit, the first mapping unit may control a data transmission direction of the first control unit, and the second mapping unit may Controlling the data transmission direction of the third control unit, so that the first control module accesses the data of the second memory module through the first and second transmission ports. The device of claim 1, wherein the first control module further includes a switching unit coupled to the first transmission port for performing between the first transmission port and the second transmission port Data transmission. The device of claim 1, wherein the first control module and the second control module are respectively coupled to at least one computer host, and are controlled The keyboard-screen-mouse signal and at least one file are transmitted to one of the computer hosts. The device of claim 1, wherein the first transmission port and the second transmission port are output/input transmission ports. The device of claim 1, wherein the first transmission port is an output transmission port, and the second transmission port is an input transmission port. The device of claim 5, further comprising a third control module, comprising a third memory module and a third transmission port, wherein the third transmission port is an output transmission port, wherein the The first control module further includes a fourth transmission port, the fourth transmission port is an input transmission port, and is electrically connected to the third transmission port, so that the third control module can access the second memory module. One of the materials. The device of claim 1, wherein each of the first and second memory units is a first-in first-out memory or a buffer. The device of claim 1, wherein the electrical connection between the second transmission port and the first transmission port is through a series of bus bars. The device of claim 8, wherein the serial bus is a high speed serial bus or a parallel bus. The device of claim 8, wherein the serial bus is operated in both directions and its direction is set by a micro control unit. The device of claim 1, wherein the third control unit includes a fifth endpoint and a sixth endpoint, the fourth control unit includes a seventh endpoint and an eighth endpoint, and The third memory unit and the fourth memory unit are shared by the third and the fourth control unit, and the second mapping unit controls data transmission between the third control unit and the fourth control unit. Transmitting direction, causing the third control unit to transmit data to the third memory unit through the fifth terminal, and the fourth control unit transmits data from the third memory unit through the seventh terminal. The device of claim 1 or 11, wherein the second memory unit is shared by the first and the second control unit, and the second control unit transmits the data to the third terminal through the third terminal a memory unit, and the first control unit transmits data from the second memory unit through the first endpoint. The device of claim 1 or 11, wherein each of the first and second control modules further comprises at least one switching unit, wherein the switching unit of the first control module is coupled to the first control unit The second control unit and the first mapping unit are configured to perform data transmission between the first control unit and the second control unit, and the switching unit of the second control module is coupled to the third control unit, The fourth control unit and the second mapping unit are configured to perform data transmission between the third control unit and the fourth control unit. The device of claim 1, wherein the first control module and the second control module are respectively disposed in an application specific integrated circuit. The device of claim 1, wherein the first control unit and the second control unit are universal sequence bus control units. A control method for a control device, comprising the following steps: (a) providing a control device comprising a first control module and a second control module, the first control module comprising a first a memory module and a first memory module and a first memory module, the first control module can access data of the first memory module, and the first control module further includes a first a mapping unit, a first control unit, and a first a second control unit, the first control unit includes a first end point and a second end point, the second control unit includes a third end point and a fourth end point, and wherein the first memory unit is the first And sharing with the second control unit, the mapping unit can control a data transmission direction between the first control unit and the second control unit, so that the first control unit transmits the data to the first endpoint a first memory unit, wherein the second control unit transmits data from the first memory unit through the third terminal, the second control module includes a second memory module and a second transmission unit, the first The second control module can access the data of the second memory module, wherein the second transmission port is electrically connected to the first transmission port; and (b) the first control module is permeable to the first and the second The second transmission accesses the data of the second memory module. The method of claim 16, wherein the first control module and the second control module are respectively coupled to at least one computer host, and further comprising a step (c) of the first control module And the second control module respectively controls a keyboard-screen-mouse signal and transmits at least one file to one of the computer hosts. The method of claim 16, wherein the device further comprises a third control module including a third memory module and a third transmission port for outputting a buffer, the first control module further The fourth transmission port is connected to the third transmission port, and the fourth transmission port is electrically connected to the third transmission port. The method further includes a step (c) of causing the third control module to access the second memory module. One of the materials.