CN205563550U - KVM module of PS2 interface based on soft nuclear of microblaze - Google Patents

Abstract

The utility model discloses a KVM module based on the PS2 interface of the Microblaze soft core, which belongs to the technical field of the KVM function realization system of the management board, and its structure includes a Microblaze soft core processor embedded in the FPGA, including an I2C for reading DDC information Main module and I2C slave module; PS2 master module connected to PS2 mouse and keyboard and PS2 slave module connected to PS2 host; operation screen display OSD module and GPIO module; DDR3 storage module for memory management and UART interface module for receiving and transmitting data , and mount the above peripheral modules to the AXI bus on the Microblaze. A kind of KVM module based on the PS2 interface of Microblaze soft core of the present utility model compares with prior art, and this KVM module is applicable to information control center, securities/financial transaction system, bank data center, industrial control environment, teaching environment, test In all multi-server or multi-computer working environments such as the center, using FPGA single chip to realize KVM function can reduce the size and area of the board card, improve speed and stability, be scientific and reasonable, and reduce costs.

Description

A KVM module with PS2 interface based on Microblaze soft core

technical field

The utility model relates to the technical field of a KVM function realization system of a management board, in particular to a KVM module of a PS2 interface based on a Microblaze soft core.

Background technique

MicroBlaze embedded soft core is a RISC processor soft core optimized by Xilinx that can be embedded in FPGA. It has the advantages of fast running speed, less resource occupation and strong configurability. It is widely used in communications, military, and high-end consumption market and other areas. Xilinx's MicroBlaze 32-bit soft processor core is a standard set of peripherals that supports the CoreConnect bus. Running at a 150MHz clock, the MicroBlaze processor delivers 125 D-MIPS of performance, making it ideal for designing complex embedded systems targeting the networking, telecom, datacom and consumer markets.

FPGA (Field-Programmable GateArray), that is, field programmable gate array, is a product of further development on the basis of programmable devices such as PAL, GAL, and CPLD. It emerged as a semi-custom circuit in the field of application-specific integrated circuits (ASIC), which not only solves the shortcomings of custom circuits, but also overcomes the shortcomings of the limited number of original programmable device gates.

KVM: It is the abbreviation of KeyboardVideoMouse. KVM switches allow you to access and control computers through direct connections to keyboard, video, and mouse (KVM) ports. KVM technology does not require the target server to modify the software. This means that the target computer can be accessed at any time under the Windows BIOS environment. KVM provides true motherboard-level access and supports multi-platform servers and serial devices.

In previous multi-unit servers, the KVM function of the management board was realized through CPLD+single-chip microcomputer. The keyboard and mouse with KVM function is a PS2-to-I2C module built in CPLD, which communicates with the single-chip microcomputer through the I2C bus, and the single-chip microcomputer is plugged with CH375 and HUB to realize the communication between each motherboard. In the entire multi-unit server, many main chips are required to realize the KVM function, which is inconvenient in the circuit layout, considering the size of the circuit board and reducing the number of chips in the circuit design.

Contents of the invention

The technical task of the present utility model is to provide a kind of KVM module based on the PS2 interface of the Microblaze soft core that utilizes the FPGA single chip to realize the KVM function.

The technical solution adopted by the utility model to solve its technical problems is: a KVM module based on the PS2 interface of the Microblaze soft core, the module includes a Microblaze soft core processor embedded in the FPGA, including an I2C main module and an I2C module for reading DDC information Slave module; PS2 master module connected to PS2 keyboard and mouse and PS2 slave module connected to PS2 host; operation screen display OSD module for calling OSD signal for channel selection; GPIO module connected to control signal; DDR3 storage module for memory management and used for A UART interface module for receiving and transmitting data, and the KVM module also includes an AXI bus for mounting the above-mentioned peripheral modules on the Microblaze.

Among them, the operation screen displays OSD module, DDR3 storage module, GPIO module, UART module, PS2 master module, PS2 slave module, I2C master module, I2C slave module and UART interface module connected in parallel to AXI bus.

The operation screen displays that the OSD module is connected with the display; the GPIO module is connected with the control signal; the PS2 slave module is connected with the host with PS2 port; the PS2 master module is connected with the PS2 keyboard and mouse; the I2C slave module is connected with the host; The main module is connected with the display; the UART interface module is connected with the debugging serial port.

Preferably, the module also includes an SDK tool for software development of the hardware.

Preferably, the module also includes an MCU module for processing cache.

Compared with the prior art, a kind of KVM module of PS2 interface based on Microblaze soft core of the present utility model is suitable for information control center, call center, securities/financial transaction system, bank data center, industrial control environment, teaching In all multi-server or multi-computer working environments such as environment and test center, using FPGA single chip to realize KVM function can reduce the size and area of the board, reduce the complexity of the system, improve speed and stability, and reduce power consumption and cost .

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Accompanying drawing 1 is a kind of KVM module of PS2 interface based on Microblaze soft core inside FPGA block diagram.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

A kind of KVM module based on the PS2 interface of Microblaze soft core of the present utility model, its structure comprises Microblaze soft core processor embedded in FPGA, embedded RAM (BRAM), Microblaze connects Dlmb control module and Ilmb control module respectively, BRAM Connect the Dlmb control module and the Ilmb control module respectively. The DLMB (DataLocalMemoryBus): a data interface, a local memory bus, used for high-speed data exchange. The ILMB (InstructionLocalMemoryBus); an instruction interface, realizes high-speed instruction reading.

Microblaze connects DDR3 storage module, GPIO module, UART module, PS2 master module, PS2 slave module, I2C master module, I2C slave module, and operation screen display OSD module through AXI bus. Among them, the operation screen displays OSD module, DDR3 storage module, GPIO module, UART module, PS2 master module, PS2 slave module, I2C master module, I2C slave module and UART interface module connected in parallel to AXI bus.

Among them, the I2C master module and the I2C slave module are used to read DDC information and are connected to the display and the host respectively, the PS2 master module is connected to the PS2 keyboard and mouse, and the PS2 slave module is connected to the host computer with the PS2 interface. Take the OSD for channel selection and connect it with the display, connect the GPIO module with the control signal, and connect the UART interface module with the debugging serial port.

The module also includes SDK tools for software development on the hardware.

The block also includes the MCU block that handles the cache.

OSD is the English abbreviation for On-Screen Display, DDR3 is the English abbreviation for Synchronous Dynamic Random Access Memory, GPIO is the English abbreviation for General Input/Output, UART is the English abbreviation for Universal Asynchronous Receiver Transmitter, and I2C is a two-part system developed by Philips. The English abbreviation of Wired Serial Bus, SDK is the English abbreviation of Software Development Kit, and MCU is the English abbreviation of Micro Control Unit.

The implementation method of this solution is to mount each peripheral module on the Microblaze soft-core processor through the AXI bus. The key value is used to call the OSD and allocate channel functions. The PS2 main module key value intercepted by the CPU is processed by the CPU and sent to the PS2 from the module to the host. The I2C main module reads the direct digital control system currently connected to the display through software. (DDC) After the information is cached by the MCU module, it waits for the I2C to read from the module.

Instructions:

After preparing the management board with the KVM module and the multi-unit server environment, power on the management board, hot-swap the PS2 keyboard and mouse device, call up the OSD interface through the PS2 keyboard to select the channel, and press the enter key after confirming the channel After entering the selected channel, operate the PS2 keyboard and mouse to see the operation action through the monitor.

Through the above specific implementation methods, those skilled in the art can easily realize the utility model. However, it should be understood that the utility model is not limited to the above-mentioned several specific implementation modes. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features, so as to realize different technical solutions.

Claims (3)

1. a kind of KVM module based on the PS2 interface of Microblaze soft core, module comprises the Microblaze soft core processor embedded in FPGA, is characterized in that, comprises the I2C master module and I2C slave module of reading DDC information; Connect PS2 mouse and keyboard PS2 master module and PS2 slave module connected to PS2 host; operation screen display OSD module for calling OSD signal for channel selection; GPIO module for connecting control signal; DDR3 storage module for memory management and UART interface module for receiving and transmitting data , the KVM module also includes the AXI bus on which the above-mentioned peripheral modules are mounted on the Microblaze; Among them, the operation screen displays OSD module, DDR3 storage module, GPIO module, UART module, PS2 master module, PS2 slave module, I2C master module, I2C slave module and UART interface module connected in parallel to AXI bus; The operation screen displays that the OSD module is connected with the display; the GPIO module is connected with the control signal; the PS2 slave module is connected with the host with PS2 port; the PS2 master module is connected with the PS2 keyboard and mouse; the I2C slave module is connected with the host; The main module is connected with the display; the UART interface module is connected with the debugging serial port. 2. eradicate the KVM module of a kind of PS2 interface based on Microblaze soft core described in claim 1, it is characterized in that, this module also comprises the SDK tool that hardware is carried out software development. 3. the KVM module of a kind of PS2 interface based on Microblaze soft core claimed in claim 1, is characterized in that, this module also comprises the MCU module of processing cache.