CN201812253U - Keyboard/mouse device capable of switching PS/2 (Personal System/2) to USB (Universal Serial Bus) - Google Patents

Abstract

The utility model provides a PS/2 to USB keyboard and mouse device, which belongs to the field of computers, and its structure includes a USB protocol output terminal, a mouse PS/2 input terminal, a keyboard PS/2 input terminal, a GPIO device and a CPU, wherein the GPIO device Including input GPIO and output GPIO, USB protocol output terminal, mouse PS/2 input terminal and keyboard PS/2 input terminal are connected and set together with the CPU, and the GPIO device is set at the other end of the CPU. Compared with the prior art, this utility model integrates the keyboard and mouse into a USB protocol device, and can realize the "programmable" design of the keyboard and mouse. In addition to the basic keyboard and mouse input and output, it can also realize the key control of the computer or The function of the peripheral circuit of the server, so that the key function expansion function can be realized on the standard keyboard.

Description

A device for converting PS/2 to USB keyboard and mouse

technical field

The utility model relates to the technical field of computers, in particular to a device for converting PS/2 to a USB keyboard and mouse.

Background technique

With the rapid development of computer technology, its peripherals are more and more inclined to develop in the direction of a unified data transmission protocol-USB (Universal Serial Bus) protocol. USB communication supports hot swap, plug and play, fast transmission speed, and can be The technical advantages such as multiple connected devices have become a relatively common communication protocol for computer peripheral interfaces. Since the USB interface has become the mainstream of computer host peripheral interfaces, many computer manufacturers have canceled the commonly used serial ports, parallel ports, PS/2 ports and other peripherals on computer hosts. The interface form is replaced by the USB interface, but there are many computer peripherals that are slow to update and are not USB interfaces. In order to prevent especially expensive non-USB peripherals from being eliminated prematurely and reduce resource waste, the transfer interface technology came into being. born.

Contents of the invention

The utility model aims at the deficiency of the above-mentioned prior art, and provides a device for converting PS/2 to a USB keyboard and mouse.

A device for converting PS/2 to USB keyboard and mouse of the present utility model is realized in the following manner. The structure includes a USB protocol output terminal, a mouse PS/2 input terminal, a keyboard PS/2 input terminal, a GPIO device and a CPU, wherein The device includes input GPIO and output GPIO, the USB protocol output terminal, the mouse PS/2 input terminal and the keyboard PS/2 input terminal are connected and set together with the CPU, and the GPIO device is set at the other end of the CPU.

Compared with the prior art, the utility model has the following outstanding beneficial effects:

The keyboard and mouse are integrated into a USB protocol device, and the "programmable" design of the keyboard and mouse can be realized. In addition to the basic keyboard and mouse input and output, it can also realize the function of pressing the key to control the peripheral circuit of the computer or server. The key function expansion function is realized on the standard keyboard.

Description of drawings

Fig. 1 is a kind of structural representation of the device that PS/2 turns USB keyboard and mouse;

Fig. 2 is a schematic structural diagram of a program method of a PS/2 to USB keyboard and mouse device.

Explanation of reference signs: ①, USB protocol output terminal, ②, mouse PS/2 input terminal, ③, keyboard PS/2 input terminal, ④, CPU, ⑤, GPIO device.

Detailed ways

A PS/2 to USB keyboard and mouse device of the present utility model is described in detail below with reference to the accompanying drawings.

As shown in Figure 1, the structure of the device of a kind of PS/2 of the present utility model turns USB keyboard and mouse comprises USB protocol output end 1., mouse PS/2 input end 2., keyboard PS/2 input end 3., GPIO device 5. and CPU④, GPIO device ⑤ includes input GPIO and output GPIO, USB protocol output ①, mouse PS/2 input ② and keyboard PS/2 input ③ are connected with CPU ④, and GPIO device ⑤ is set at the other end of CPU ④ .

A kind of PS/2 of the utility model turns the program method of the device of USB keyboard and mouse as follows:

Keyboard PS/2 input ③, mouse PS/2 input ② can be plugged in and used at the same time, the internal USB enumeration process integrates two peripheral protocols, the control chip receives, mouse PS/2 input ②, keyboard After PS/2 input ③ signal is decoded, it is converted into the corresponding value in the USB protocol and then output to the host through the USB port, and the mouse PS/2 input ② and keyboard PS/2 input ③ are mutually input when there is signal input at the same time There will be no interference between them, and the performance of the separate USB keyboard and mouse is consistent.

Insert the mouse PS/2 input terminal ②, the keyboard PS/2 input terminal ③ into the corresponding interface, connect the special function key to the input GPIO device ⑤, and finally insert the USB plug into the host USB slot, and wait for the host to recognize the peripheral. After the identification is completed, the mouse PS/2 input terminal ② and keyboard PS/2 input terminal ③ can be used, realizing the hot plug function of PS/2 port.

The input GPIO can be defined as a special function key that is not defined on the keyboard, and the corresponding key value is output on the USB end, such as defining a combination key, for example, the key value defined as Ctrl+C, when the user-defined key is pressed to make the corresponding input GPIO When the terminal level changes, the USB port can output "copy" commands to the host computer; it can be defined as a control port for keyboard keys that are not commonly used to control other peripherals. For example, the Esc key can be used to control the power on and off of the printer on the host computer. When Esc is pressed three times in a certain period of time, the level of the corresponding output GPIO port will change to realize the digital control function.

Except for the technical features described in the instructions, all are known technologies by those skilled in the art.

Claims (1)

1. A PS/2 turns the device of USB keyboard and mouse, it is characterized in that structure comprises USB protocol output end, mouse PS/2 input end, keyboard PS/2 input end, GPIO device and CPU, wherein GPIO device comprises input GPIO and Output GPIO, USB protocol output terminal, mouse PS/2 input terminal and keyboard PS/2 input terminal are connected and set together with the CPU, and the GPIO device is set at the other end of the CPU.

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