PS/2 keyboard dual-computer plug-in system of LPC bus interface and switching method

A bus interface and keyboard technology, which is applied in the field of PS/2 keyboard dual-computer plug-in system and switching, can solve problems such as inability to complete switching, and achieve the effect of satisfying shared switching

CN112347017AInactive Publication Date: 2021-02-09TIANJIN EMBEDTEC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a PS / 2 keyboard dual-computer plug-in system of an LPC bus interface, which is characterized by comprising an internal host CPU, an FPGA controller, a PS / 2 keyboard and an external computer PS / 2 interface; the internal host CPU is connected with the FPGA controller through an LPC protocol bus, the FPGA controller is connected with the PS / 2 keyboard, and the FPGA controlleris connected with the external computer PS / 2 interface; the FPGA controller comprises an LPC time sequence module, an LPC serial interrupt module, an FIFO module, a PS / 2 sending module, a PS / 2 receiving module and a PS / 2 watchdog module. The invention has the advantages and beneficial effects that the problem that the PS2 keyboard is shared between the host of the LPC bus and the host of the universal PS2 interface can be effectively solved, and dual-computer sharing switching of the PS2 keyboard with different interfaces can be met.
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Description

technical field

[0001] The invention relates to the field of computer communication, in particular to an LPC bus interface PS / 2 keyboard dual-computer plug-in system and a switching method. Background technique

[0002] In military customized complex multi-host computer systems, a keyboard input device is often required to control two host computers in the system. The existing technology uses hardware KVM technology to realize two-way switching of communication, but this technical solution requires two host computers to be switched The keyboard input device has the same input interface protocol, and the KVM function is realized through a USB multiplexer or a switch device. When the two hosts have different interface protocols, the switch cannot be completed. Contents of the invention

[0003] The object of the present invention is to overcome the defect in the prior art, provide a kind of PS / 2 keyboard dual-computer external system and switching method of LPC bus interface...

Examples

Embodiment Construction

[0014] The present invention will be further described in detail through the accompanying drawings and specific embodiments below.

[0015] Such as figure 1 As shown, a PS / 2 keyboard dual-machine plug-in system with LPC bus interface includes an internal host CPU, an FPGA controller, a PS / 2 keyboard, and an external PS / 2 interface. The internal host CPU communicates with the FPGA controller through the LPC protocol bus. The FPGA controller is connected to the PS / 2 keyboard, and the FPGA controller is connected to the PS / 2 interface of the external machine; the FPGA controller includes the LPC timing module, LPC serial interrupt module, FIFO module, PS / 2 sending module, PS / 2 receiver module, PS / 2 watchdog module.

[0016] The LPC timing module is connected with the internal host CPU to realize the LPC bus read and write operation of the internal host CPU. The LPC serial interrupt module reports the internal host CPU in a serial interrupt mode when detecting that the button in...