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CN105630443B - OSD display method of a KVM system - Google Patents

OSD display method of a KVM system Download PDF

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Publication number
CN105630443B
CN105630443B CN201510959806.8A CN201510959806A CN105630443B CN 105630443 B CN105630443 B CN 105630443B CN 201510959806 A CN201510959806 A CN 201510959806A CN 105630443 B CN105630443 B CN 105630443B
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osd
chip
clock
control module
display
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CN105630443A (en
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尹超
李朋
姜凯
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Shandong Inspur Science Research Institute Co Ltd
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Inspur Group Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The present invention discloses a kind of OSD display methods of kvm system, belongs to Computer display field；The EDID information of display is respectively written into the SDRAM of multiple I2C interfaces, by judging that it is whether consistent that single-chip microcontroller and host read EDID information, point situation, which shows the center of OSD menu, to be controlled, single-chip microcontroller reads SDRAM and obtains the EDID information of display to configure OSD control module, Dot Clock needed for generating OSD control module using functional chip, OSD control module is for generating OSD menu, ensure that different display OSDs can normally be shown, it operates relatively simple, the normal of OSD can be realized when host reads EDID and does not read two kinds of EDID and is shown centered on, reduce the troublesome in poeration of user.

Description

A kind of OSD display methods of kvm system
Technical field
The present invention discloses a kind of OSD display methods of kvm system, belongs to Computer display field.
Background technique
With the continuous development of information technology, the management of server room becomes increasingly complex, and kvm system is come into being.KVM It is the English head letter abbreviations of keyboard (Keyboard), video display (Video), mouse (Mouse), i.e., is covered with a set of or number Keyboard, display and mouse switch between the multiple host of multiple and different operating systems.KVM can grasp multiple servers Make and manages.Wherein during kvm system management server the use of OSD menu be it is essential, it can simplify use Family is but many kinds of due to display in practical application to the operation difficulty of kvm system, in order to guarantee that OSD menu can be with It is normally shown on all displays, it is necessary to the EDID for reading display, when determining resolution sizes, the point of present displays The information such as clock frequency, otherwise OSD menu can not normally be shown.The present invention is to ensure that different displays guarantees that OSD can be normal Display realizes OSD's when host reads EDID and does not read two kinds of EDID using relatively simple method Normally and it is shown centered on.Compatible various displays realize normally being shown centered on for OSD, reduce the troublesome in poeration of user.
The abbreviation of OSD, on-screen display, i.e. screen menu type regulative mode.Usually press screen after Menu key The rectangle menu of the display items reconciling items information of pop-up can include color to display work in every index by the menu Coloured silk, mode, geometry etc. are adjusted, to reach optimal use state.
Summary of the invention
The present invention for the defects in the prior art, provides a kind of OSD display methods of kvm system, ensures different show Show that device guarantees that OSD can normally be shown, using relatively simple method, reads EDID in host and do not read EDID The normal of OSD is realized in the case of two kinds and is shown centered on.Compatible various displays realize normally being shown centered on for OSD, reduce User's is troublesome in poeration.
Concrete scheme proposed by the present invention is:
The EDID information of display is respectively written into SDRAM by a kind of OSD display methods of kvm system, server host with Single-chip microcontroller reads EDID information respectively, judge single-chip microcontroller read EDID information that EDID information and server host are read whether one It causes；
In consistent situation: single-chip microcontroller reads SDRAM and obtains the EDID information of display to export frequency multiplication multiple and OSD Boundary parameter give respectively control Dot Clock chip and OSD control module,
Dot Clock needed for controlling the chip generation OSD control module of Dot Clock,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle；
In inconsistent situation: single-chip microcontroller count signal information obtains difference using the information and the frequency of single-chip microcontroller Frequency multiplication multiple, OSD boundary parameter give the chip and OSD control module of control Dot Clock respectively,
Dot Clock needed for controlling the chip generation OSD control module of Dot Clock,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle.
It is described in consistent situation: single-chip microcontroller read EDID information, pixel clock, Hsync including present displays And the information of Vsync, so that the boundary parameter for exporting frequency multiplication multiple and OSD is controlled to the chip and OSD of control Dot Clock respectively Molding block, the chip for controlling Dot Clock obtain believing with pixel clock with the clock of phase by Hsync signal and frequency multiplication multiple Number, OSD control module generates an OSD menu placed in the middle by the parameter and clock signal on the boundary OSD.
It is described in inconsistent situation: single-chip microcontroller read EDID information, the pixel clock including present displays, The information of Hsync and Vsync, single-chip microcontroller counts Hsync signal number information, using the information and the frequency of single-chip microcontroller, The frequency for calculating Hsync, according to the different frequency multiplication multiple of different Hsync rate-adaptive pacemakers, OSD boundary parameter gives control respectively The chip and OSD control module of Dot Clock, Dot Clock needed for controlling the chip generation OSD control module of Dot Clock, OSD control Module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle.
A kind of OSD display system of kvm system, including I2C Master module, I2C Slave module, SDRAM, monolithic Machine, OSD control module control the chip of Dot Clock；
I2C Master module is responsible for the EDID information of display being respectively written into SDRAM,
The EDID information of SDRAM iatron is read for server host,
I2C Slave module judge single-chip microcontroller read EDID information that EDID information and server host are read whether one It causes,
In consistent situation: single-chip microcontroller reads SDRAM and obtains the EDID information of display to export frequency multiplication multiple and OSD Boundary parameter give respectively control Dot Clock chip and OSD control module,
Dot Clock needed for the chip of control Dot Clock is used to generate OSD control module,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle；
In inconsistent situation: single-chip microcontroller count signal information obtains difference using the information and the frequency of single-chip microcontroller Frequency multiplication multiple, OSD boundary parameter give the chip and OSD control module of control Dot Clock respectively,
Dot Clock needed for the chip of control Dot Clock is used to generate OSD control module,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle.
The I2C Master module is written in SDRAM by the EDID information in I2C interface display.
SDRAM, OSD control module, the chip for controlling Dot Clock are connect by wishbone bus with single-chip microcontroller.
The chip of the control Dot Clock is IDT9173 family chip.
Usefulness of the present invention is:
The EDID information of display is respectively written into the SDRAM of multiple I2C interfaces by the method for the present invention, by judging single-chip microcontroller Read whether EDID information is consistent, and point situation shows the center of OSD menu and controls with host, single-chip microcontroller reads SDRAM The EDID information of display is obtained to configure OSD control module, when using point needed for functional chip generation OSD control module Clock, OSD control module are used to generate OSD menu, ensure that different display OSDs can normally be shown, operation is relatively simple, Host reads EDID and can realize the normal of OSD in the case of not reading two kinds of EDID and be shown centered on, and reduces User's is troublesome in poeration.
Detailed description of the invention
The structural block diagram of Fig. 1 present invention display system；
The work flow diagram of Fig. 2 the method for the present invention.
Specific embodiment
The EDID information of display is respectively written into SDRAM by a kind of OSD display methods of kvm system, server host with Single-chip microcontroller reads EDID information respectively, judge single-chip microcontroller read EDID information that EDID information and server host are read whether one It causes；
In consistent situation: single-chip microcontroller reads SDRAM and obtains the EDID information of display to export frequency multiplication multiple and OSD Boundary parameter give respectively control Dot Clock chip and OSD control module,
Dot Clock needed for controlling the chip generation OSD control module of Dot Clock,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle；
In inconsistent situation: single-chip microcontroller count signal information obtains difference using the information and the frequency of single-chip microcontroller Frequency multiplication multiple, OSD boundary parameter give the chip and OSD control module of control Dot Clock respectively,
Dot Clock needed for controlling the chip generation OSD control module of Dot Clock,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle.
A kind of OSD display system of kvm system, including I2C Master module, I2C Slave module, SDRAM, monolithic Machine, OSD control module control the chip of Dot Clock；
I2C Master module is responsible for the EDID information of display being respectively written into SDRAM,
The EDID information of SDRAM iatron is read for server host,
I2C Slave module judge single-chip microcontroller read EDID information that EDID information and server host are read whether one It causes,
In consistent situation: single-chip microcontroller reads SDRAM and obtains the EDID information of display to export frequency multiplication multiple and OSD Boundary parameter give respectively control Dot Clock chip and OSD control module,
Dot Clock needed for the chip of control Dot Clock is used to generate OSD control module,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle；
In inconsistent situation: single-chip microcontroller count signal information obtains difference using the information and the frequency of single-chip microcontroller Frequency multiplication multiple, OSD boundary parameter give the chip and OSD control module of control Dot Clock respectively,
Dot Clock needed for the chip of control Dot Clock is used to generate OSD control module,
OSD control module exports clock by the chip of OSD boundary parameter and control Dot Clock and generates OSD menu placed in the middle.
According to the above method and system, in conjunction with attached drawing, the present invention will be further described.
Present system include I2C Master module, I2C Slave module, SDRAM, single-chip microcontroller, OSD control module, IDT9173 chip.Wherein I2C Master module is connected with display, can produce address, data, read-write completion display The I2C interface of device EDID information is read and the write-in to SDRAM.Wherein SDRAM, OSD control module, IDT9173 etc. are logical It crosses wishbone bus to connect with single-chip microcontroller, referring to Fig.1.
The method of the present invention: after system electrification and reset, I2C Master module can issue read command, read display In EDID information, and be stored in SDRAM.Server host and single-chip microcontroller read EDID information respectively, and single-chip microcontroller can be determined When read the working condition of I2C Slave interface for a period of time, believe according to whether I2C slave module spreads out of whole EDID Breath, it can be determined that whether read EDID information completely, judge whether that real host reads the EDID being located in SDRAM completely Information is read very consistent with single-chip microcontroller.In the case where reading the consistent situation of information: then single-chip microcontroller then reads the EDID in SDRAM Information, the information of best image the pixel clock, Hsync and Vsync of present displays, Hsync information includes Hsync The information such as Active, Hsync Blank, Hsync Sync, Hsync Front Porch.Frequency multiplication multiple is Hsync Active+Hsync Blank.Left margin is (Hsync Active-OSD horizontal size)/2+Hsync Blank-Hsync Front Porch.Coboundary is similar with left margin, the Vsync information only read.Single-chip microcontroller exports frequency multiplication multiple and OSD's Boundary parameter gives IDT9173 chip and OSD control module respectively, and IDT9173 chip is obtained by Hsync signal and frequency multiplication multiple To the clock signal with pixel clock with phase, OSD control module generates one by the parameter and clock signal on the boundary OSD A OSD menu placed in the middle.
If host does not read EDID information, i.e., in inconsistent situation: then single-chip microcontroller counts Hsync signal The number information of failing edge to next failing edge the frequency of Hsync is calculated according to the information and the frequency of single-chip microcontroller Rate is given further according to the methods of tabling look-up according to the different frequency multiplication multiple of different Hsync rate-adaptive pacemakers, OSD up-and-down boundary etc. respectively IDT9173 chip and OSD control module, OSD control module generate one between two parties by the parameter and clock signal on the boundary OSD OSD menu.Guarantee OSD host regardless of either with or without read EDID can normally and be shown centered on.

Claims (7)

1.一种KVM系统的OSD显示方法，其特征是将显示器的EDID信息分别写入SDRAM，服务器主机与单片机分别读取EDID信息，判断单片机读取的EDID信息与服务器主机读取的EDID信息是否一致；1. the OSD display method of a KVM system is characterized in that the EDID information of the display is written into SDRAM respectively, the server host and the single-chip microcomputer read the EDID information respectively, and judge whether the EDID information read by the single-chip computer and the EDID information read by the server host is not. consistent; 在一致情况下：单片机读取SDRAM获取显示器的EDID信息从而输出倍频倍数及OSD的边界参数分别给控制点时钟的芯片及OSD控制模块，In the same case: the single-chip microcomputer reads the SDRAM to obtain the EDID information of the display to output the frequency multiplier and the boundary parameters of the OSD to the chip and the OSD control module of the control point clock respectively. 控制点时钟的芯片产生OSD控制模块所需的时钟信号，The chip that controls the clock of the point generates the clock signal required by the OSD control module, OSD控制模块通过OSD边界参数及控制点时钟的芯片输出时钟信号产生OSD居中菜单；The OSD control module generates the OSD center menu through the OSD boundary parameters and the chip output clock signal of the control point clock; 在不一致情况下：单片机计数EDID信息中的Hsync信号个数信息，利用该Hsync信号个数信息以及单片机的频率，得出不同倍频倍数，OSD边界参数分别给控制点时钟的芯片及OSD控制模块，In the case of inconsistency: the single-chip microcomputer counts the number of Hsync signals in the EDID information, and uses the information of the number of Hsync signals and the frequency of the single-chip microcomputer to obtain different frequency multipliers, and the OSD boundary parameters are respectively given to the control point clock chip and OSD control module , 控制点时钟的芯片产生OSD控制模块所需的时钟信号，The chip that controls the clock of the point generates the clock signal required by the OSD control module, OSD控制模块通过OSD边界参数及控制点时钟的芯片输出的时钟信号产生OSD居中菜单。The OSD control module generates the OSD center menu through the OSD boundary parameters and the clock signal output by the chip that controls the clock of the point. 2.根据权利要求1所述的方法，其特征是所述在一致情况下：单片机读取EDID信息，包括当前显示器的pixel clock，Hsync以及Vsync的信息，从而输出倍频倍数及OSD的边界参数分别给控制点时钟的芯片及OSD控制模块，控制点时钟的芯片通过Hsync信号以及倍频倍数得到与pixel clock同相的时钟信号，OSD控制模块通过OSD边界的参数以及时钟信号产生一个居中的OSD菜单。2. method according to claim 1 is characterized in that described in the consistent situation: single-chip microcomputer reads EDID information, comprises the pixel clock of current display, the information of Hsync and Vsync, thereby outputs the boundary parameter of frequency multiplier and OSD Give the chip of the control point clock and the OSD control module respectively. The chip of the control point clock obtains the same phase clock signal as the pixel clock through the Hsync signal and the multiplier. The OSD control module generates a centered OSD menu through the parameters of the OSD boundary and the clock signal. . 3.根据权利要求1所述的方法，其特征是所述在不一致情况下：单片机读取EDID信息，包括当前显示器的pixel clock，Hsync以及Vsync的信息，单片机计数Hsync信号个数信息，利用该Hsync信号个数信息以及单片机的频率，计算出Hsync的频率，根据不同的Hsync频率输出不同的倍频倍数，OSD边界参数分别给控制点时钟的芯片及OSD控制模块，控制点时钟的芯片产生OSD控制模块所需的时钟信号，OSD控制模块通过OSD边界参数及控制点时钟的芯片输出的时钟信号产生OSD居中菜单。3. method according to claim 1, it is characterized in that described in inconsistent situation: single-chip microcomputer reads EDID information, comprises the pixel clock of current display, the information of Hsync and Vsync, single-chip computer counts Hsync signal number information, utilizes this The number of Hsync signals and the frequency of the single-chip microcomputer are used to calculate the frequency of Hsync, and output different multipliers according to different Hsync frequencies. The OSD boundary parameters are respectively given to the chip that controls the clock of the point and the OSD control module, and the chip that controls the clock of the point generates OSD The clock signal required by the control module, the OSD control module generates the OSD center menu through the OSD boundary parameters and the clock signal output by the chip that controls the point clock. 4.一种KVM系统的OSD显示系统，其特征是包括I2C Master模块，I2C Slave模块，SDRAM，单片机，OSD控制模块，控制点时钟的芯片；4. the OSD display system of a KVM system is characterized in that comprising I2C Master module, I2C Slave module, SDRAM, single chip microcomputer, OSD control module, the chip of control point clock; I2C Master模块负责将显示器的EDID信息分别写入SDRAM，The I2C Master module is responsible for writing the EDID information of the display into SDRAM respectively, SDRAM存储显示器的EDID信息，用于服务器主机读取，SDRAM stores the EDID information of the display for the server host to read, I2C Slave模块判断单片机读取的EDID信息与服务器主机读取的EDID信息是否一致，The I2C Slave module judges whether the EDID information read by the microcontroller is consistent with the EDID information read by the server host. 在一致情况下：单片机读取SDRAM获取显示器的EDID信息从而输出倍频倍数及OSD的边界参数分别给控制点时钟的芯片及OSD控制模块，In the same case: the single-chip microcomputer reads the SDRAM to obtain the EDID information of the display to output the frequency multiplier and the boundary parameters of the OSD to the chip and the OSD control module of the control point clock respectively. 控制点时钟的芯片用于产生OSD控制模块所需的时钟信号，The chip of the control point clock is used to generate the clock signal required by the OSD control module, OSD控制模块通过OSD边界参数及控制点时钟的芯片输出的时钟信号产生OSD居中菜单；The OSD control module generates the OSD center menu through the OSD boundary parameters and the clock signal output by the chip of the control point clock; 在不一致情况下：单片机计数EDID信息中的Hsync信号个数信息，利用该Hsync信号个数信息以及单片机的频率，得出不同倍频倍数，OSD边界参数分别给控制点时钟的芯片及OSD控制模块，In the case of inconsistency: the single-chip microcomputer counts the number of Hsync signals in the EDID information, and uses the information of the number of Hsync signals and the frequency of the single-chip microcomputer to obtain different frequency multipliers, and the OSD boundary parameters are respectively given to the control point clock chip and OSD control module , 控制点时钟的芯片用于产生OSD控制模块所需的时钟信号，The chip of the control point clock is used to generate the clock signal required by the OSD control module, OSD控制模块通过OSD边界参数及控制点时钟的芯片输出的时钟信号产生OSD居中菜单。The OSD control module generates the OSD center menu through the OSD boundary parameters and the clock signal output by the chip that controls the clock of the point. 5.根据权利要求4所述的系统，其特征是所述I2C Master模块通过I2C接口显示器中的EDID信息写入SDRAM中。5. The system according to claim 4, wherein the I2C Master module is written in the SDRAM through the EDID information in the I2C interface display. 6.根据权利要求4或5所述的系统，其特征是所述SDRAM、OSD控制模块、控制点时钟的芯片通过wishbone总线与单片机连接。6. The system according to claim 4 or 5, wherein the SDRAM, the OSD control module, and the chip of the control point clock are connected to the single-chip microcomputer through a wishbone bus. 7.根据权利要求6所述的系统，其特征是所述控制点时钟的芯片为IDT9173系列芯片。7. The system according to claim 6, wherein the chip of the control point clock is an IDT9173 series chip.
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CN108491176B (en) * 2018-03-08 2021-01-26 福建捷联电子有限公司 Display time method based on OSD semi-transparent mode
CN109936708B (en) * 2019-04-28 2021-05-04 科大讯飞股份有限公司 VGA video switching device, method and system
CN110531881B (en) * 2019-08-16 2023-04-07 北京小鸟科技股份有限公司 Centralized KVM system for calling OSD menu by mouse

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