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Method for automatically acquiring DDC (Direct Digital Control) information of display

An automatic acquisition and display technology, applied in the computer field, can solve problems such as inconvenient operation, channel failure to display normally, application restrictions, etc.

Inactive Publication Date: 2015-02-18
SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From loading PMON to entering the system on a domestic independent platform computer, the VBIOS program of the graphics card needs to read the configuration information of the display multiple times through the I2C bus. If the display is switched during the startup process, the channel cannot be displayed normally.
Only after the channel is fully connected to the operating system interface can the channel be switched and the next channel opened. The operation is inconvenient and the application in KVM switches and high-performance computers is limited.

Method used

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  • Method for automatically acquiring DDC (Direct Digital Control) information of display

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Such as figure 1 As shown, a method for automatically obtaining display DDC information is configured on the computer signal switching circuit board with a memory chip EEPROM consistent with the number of the main board, and connected to the north bridge chip of the main board and the MCU on the signal switching circuit board through the I2C bus for storing The DDC information of the DVI display; when the system is powered on and the main board successfully reads the content of the EEPROM corresponding to the address, the main board outputs the DVI video signal to the DVI chip selection chip to switch the chip selection information, realize the DVI video switching and display it under the operating system The resolution is configurable.

Embodiment 2

[0018] On the basis of Embodiment 1, the operation process of the method described in this embodiment is: the EEPROM chip of the number consistent with the motherboard is configured on the signal switching board, and each EEPROM is correspondingly assigned a different physical address, and at first the MCU of the signal switching board detects whether The front end is connected with a display, if there is, the MCU reads the DDC information of the display through I2C and writes the acquired DDC information of the display into EEPROM.

Embodiment 3

[0020] On the basis of Embodiment 1 or 2, the method described in this embodiment reads the content of the EEPROM of the corresponding address through the I2C bus during the mainboard startup process, and then outputs the DVI video signal to the DVI chip selection chip. When the signal is switched, the output gates the DVI video corresponding to the motherboard, and realizes the configurable resolution under the operating system.

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PUM

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Abstract

The invention discloses a method for automatically acquiring DDC (Direct Digital Control) information of a display. Storage chips, EEPROMs (Electrically Erasable Programmable Read-only Memories), in the same quantity as mainboards are configured on a signal switching circuit board of a computer; and MCU (Micro Controller Unit) connected to north bridge chips of the mainboards and the signal switching circuit board via I2C (Inter-Integrated Circuit) buses is used for storing the DDC information of the DVI (Digital Video Interactive) display; and after a system is powered on and the mainboards read contents of the EEPROMs of corresponding addresses successfully, the mainboards output DVI video signals to DVI chip selection chips for chip selection information switching, thereby achieving DVI video switching and configurable resolution under the operating system. With the adoption of the method, the DDC information of the display can be automatically acquired to achieve real-time switching of the DVI signals of the computer.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method for automatically acquiring display DDC information to realize real-time switching of DVI video. Background technique [0002] DVI video technology is more and more widely used in computers due to the advantages of good digital signal quality, fast transmission speed, strong anti-interference ability, clearer and smoother picture, and fast refresh speed. [0003] From loading PMON to entering the system, the domestic independent platform computer needs to read the configuration information of the display multiple times through the I2C bus in the VBIOS program of the graphics card. If the display is switched during the startup process, the channel cannot be displayed normally. Only after the channel has fully completed the operating system interface can the channel be switched and the next channel opened. The operation is inconvenient and the application in KVM switches and high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/14
CPCG06F3/1423
Inventor 姜微微陈乃阔
Owner SHANDONG CHAOYUE DATA CONTROL ELECTRONICS CO LTD
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