CN101887710B - Display having EDID (Extended Display Identification Data) automatic burning function at first boot - Google Patents

Abstract

The invention relates to a display having an EDID (Extended Display Identification Data) automatic burning function at the first boot. The display is characterized by comprising main software which contains an EDID burning program and EDID data of each interface, wherein the main software is stored in an SPIFlash, I/O ports of CS#, SI, SO, WP# and SCLK in the SPIFlash are connected with I/O ports corresponding to MCU (Microprogrammed Control Unit) by a bus, and the output end of the MCU is connected with a WP/SCL/SDA bus of EEPROM (Electrically Erasable Programmable Read-Only Memory) for storing the EDID of each interface of a liquid crystal display. By using an IIC communication protocol, the EDID can automatically transfer and burn EDID preset in the MCU software to the corresponding EEPROM when the display boots for the first time, and therefore, the unmanned EDID burning is realized, the operation action is reduced, the production efficiency and the quality are improved, and the manufacturing cost is greatly lowered.

Description

The display of the automatic burning of EDID when starting shooting for the first time

Technical field

The display of the automatic burning of EDID when the present invention relates to start shooting a kind of first time.

Background technology

In order to let those skilled in the art can better understand the present invention, in the face of describing: DDC, several nouns refer to the bus standard that display and host computer communicate down, full name is: Display Data Channel.Its basic function is exactly the electronic record data information with display, such as receiving capable field frequency scope, production firm, date of manufacture, product ID, product type, typical display mode and parameter thereof, the DDC standard category of being supported, version information of EDID or the like.

EDID (Extended Display Identification Data Standard) data are exactly display is transferred to the normal data information of host computer through DDC, divides with regard to the data message amount, and EDID is divided into 128 BYTE and 256 BYTE.The EDID data of Analog and Digital is respectively 128 BYTE, 256 BYTE at present;

EEPROM:Electrically Erasable Programmable Read-Only Memory, EEPROM, the storage chip that data are not lost after a kind of power down.EEPROM can on computers or wipe existing information, reprogramming on the specialized equipment.Generally be used in plug and play (the Plug & Play) interface card, be used for depositing the hardware setting data; Just be stored in this chip like the LCD TV of our present use and the EDID data of display.

Available liquid crystal TV and display have a plurality of interfaces, and each interface all needs corresponding EDID (the Extended Display Identification Data Standard) data of online complete machine burning; Each interface at first need insert corresponding signal lines, and IIC communicates by letter through the PC parallel port, and corresponding EDID is written in the corresponding interface chip with writing card with special burning software.In streamline EDID burning, just exist following problem like this: it is many 1) to close EDID storage chip write-protect mode, is prone to produce the operation puzzlement; 2) need plug each interface signal line, repeat the operation action, the waste production time, cause production bottleneck; 3) burning EDID program is prone to select the many wrongs easily of interface of mistake and burning EDID or miss, and influences product quality; 4) need two people's coordinating operations, the burn job time is 12-15S, influences production efficiency, increases manufacturing cost; 5) prior art is that manually-operated is judged, has the leakage hidden danger of personnel operation.

Summary of the invention

In view of the deficiency of above-mentioned technology, EDID can be burnt to the display among the corresponding EEPROM with EDID automatically when the present invention provided start shooting a kind of first time, need not artificial burning EDID, reduced the operation action.

The present invention realizes like this; The display of the automatic burning of EDID when start shooting a kind of first time; It is characterized in that: comprise the main software that contains EDID burning program and each interface EDID data; Said main software is stored in the SPI Flash, and the I/O mouth of CS#, SI, SO, WP#, SCLK is connected with the corresponding I/O mouth of MCU through bus among the said SPI Flash, and the bus of the WP/SCL/SDA of each interface of the output terminal of said MCU and LCD EDID storage EEPROM is connected;

The realization flow of described EDID burning program comprises:

1) after display is started shooting for the first time; Judge whether each interface EDID storage EEPROM stores, the Byte that main software will define among the EEPROM of other data of storage is a flag register: 1 interface EDID storage EEPROM successful, each interface of all the other numeric representations EDID of burning automatically stores not burning of EEPROM;

2) if main software is judged as not burning, then carry out communication, and close the EEPROM write-protect through IIC docking port EDID storage EEPROM, carry out burning;

3) after each interface EDID burning success, main software puts 1 to the Byte sign of EDID EEPROM;

After the automatic burning success of the EDID that starts shooting for the first time, the Byte flag register of the main software of a follow-up start determining interface EDID storage EEPROM is 1 and does not carry out above action.

The present invention has following beneficial effect:

1) burning is judged by software and is implemented, and need not artificial burn job, automatically, the scheme that solves of efficient and the high and low cost of quality;

2) reduce recordable time, remove operation waste actuation time and solve production bottleneck,, reduce manufacturing cost greatly to promote production efficiency and quality;

3) reduce personnel operation leakage hidden danger, realize each interface of automatic burning EDID;

4) improve competitiveness of product.

Description of drawings

Fig. 1 is a circuit structure principle schematic of the present invention.

Fig. 2 is a software design schematic flow sheet of the present invention.

Embodiment

Below in conjunction with accompanying drawing and examples of implementation the present invention is further specified.

As shown in Figure 1; The present invention provides the display of the automatic burning of EDID when starting shooting a kind of first time; It is characterized in that: comprise the main software that contains EDID burning program and each interface EDID data; Said main software is stored in the SPI Flash, and the I/O mouth of CS#, SI, SO, WP#, SCLK is connected with the corresponding I/O mouth of MCU through bus among the said SPI Flash, and the bus of the WP/SCL/SDA of each interface of the output terminal of said MCU and LCD EDID storage EEPROM is connected.Described each interface EDID storage EEPROM comprises the storage EEPROM of VGA interface EDID, the corresponding stored EEPROM of each interface EDID of HDMI.

As shown in Figure 2, the realization flow of EDID burning program comprises among the present invention:

1) after display is started shooting for the first time; Judge whether each interface EDID storage EEPROM stores, the Byte that main software will define among the EEPROM of other data of storage is a flag register: 1 interface EDID storage EEPROM successful, each interface of all the other numeric representations EDID of burning automatically stores not burning of EEPROM;

2) if main software is judged as not burning, then carry out communication, and close the EEPROM write-protect through IIC docking port EDID storage EEPROM, carry out burning;

3) after each interface EDID burning success, main software puts 1 to the Byte sign of EDID EEPROM;

After the automatic burning success of the EDID that starts shooting for the first time, the Byte flag register of the main software of a follow-up start determining interface EDID storage EEPROM is 1 and does not carry out above action.

EDID storage correlative code is following in the software:

/*?**********************************

**?Purpose: write?EDID

**?**********************************/

void?EEPROM_EDID_WRITE(void)

{

static?int?EDID_Flag;//***flag?of?EDID?that?wehther?EDID?has?been?writen***//

if?(?EDID_Flag!=1)//check?EEPROM_EDID_Flag==1

{

I2CSeqWrite(ID_EEPROM_VGA,?EEPROM_VGA_EDID,128);//write?VGA?EDID

TIME_DelayMs(10);//delay

I2CSeqWrite(ID_EEPROM_HDMI1,?EEPROM_HDMI1_EDID,256);//write?HDMI1?EDID

TIME_DelayMs(10);//delay

I2CSeqWrite(ID_EEPROM_HDMI2,?EEPROM_HDMI2_EDID,256);//write?HDMI2?EDID

TIME_DelayMs(10);//delay

EDID_Flag=1;//set?EEPROM_EDID_Flag?Ture

}

else

goto?EXIT;//exit?function

}

The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.

Claims (2)

1. the display of the automatic burning of EDID when start shooting a first time; It is characterized in that: comprise the main software that contains EDID burning program and each interface EDID data; Said main software is stored in the SPI Flash; The I/O mouth of CS#, SI, SO, WP#, SCLK is connected with the corresponding I/O mouth of MCU through bus among the said SPI Flash, and the bus of the WP/SCL/SDA of each interface of the output terminal of said MCU and LCD EDID storage EEPROM is connected;

The realization flow of described EDID burning program comprises:

1) after display is started shooting for the first time; Judge whether each interface EDID storage EEPROM stores, the Byte that main software will define among the EEPROM of other data of storage is a flag register: 1 interface EDID storage EEPROM successful, each interface of all the other numeric representations EDID of burning automatically stores not burning of EEPROM;

2) if main software is judged as not burning, then carry out communication, and close the EEPROM write-protect through IIC docking port EDID storage EEPROM, carry out burning;

3) after each interface EDID burning success, main software puts 1 to the Byte sign of EDID EEPROM;

After the automatic burning success of the EDID that starts shooting for the first time, the Byte flag register of the main software of a follow-up start determining interface EDID storage EEPROM is 1 and does not carry out above action.

2. the display of the automatic burning of EDID when start shooting the first time according to claim 1 is characterized in that: described each interface EDID storage EEPROM comprises the storage EEPROM of VGA interface EDID, the corresponding stored EEPROM of each interface EDID of HDMI.

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