CN100397869C

CN100397869C - TV set EEPROM on-line write method

Info

Publication number: CN100397869C
Application number: CNB2005101045123A
Authority: CN
Inventors: 周建勇; 王显刚; 刘风雷; 李威; 邱圣龙; 张明龙
Original assignee: Hisense Group Co Ltd; Qingdao Hisense Electronics Co Ltd
Current assignee: Hisense Co Ltd; Hisense Visual Technology Co Ltd
Priority date: 2005-11-16
Filing date: 2005-11-16
Publication date: 2008-06-25
Anticipated expiration: 2025-11-16
Also published as: CN1764235A

Abstract

The present invention relates to an on-line writing method for a TV EEPROM, which comprises the following procedures: (1) an on-line writing circuit is built; (2) EEPROM chips carry out prewriting operation successively by an HDMI, a DVI and a special port; whether the chips required to write exist is judged according to that whether the operation succeeds; if the chips exist, the present invention enters the procedure (5); if the chips do not exist, the present invention enters a next port for prewriting operation or returns to the procedure (2); (5) the present invention uses different address spaces to judge the volumetric capacity ranges of the chips; the specific volumetric capacities of the chips are judged by a prewriting method; if the volumetric capacities are enough, the present invention invokes the writing chips of the relevant procedure; if the volumetric capacities are not enough, the present invention is displayed. The present invention can carry out on-line writing for the EEPROM by an I2C, has no need of opening a package in advance for writing the procedures, and is packed again. The present invention simultaneously writes the procedures when used for detection, has the advantages of simple production process, high production efficiency and low production cost, and can be widely applied to writing the EEPROMs of various plate TV sets.

Description

The online wiring method of TV set EEPROM

Technical field

The invention belongs to technical field of television sets, more particularly relate to the design of the online wiring method of TV set EEPROM.

Background technology

Development along with TV tech, display device develops to the plane Display Technique from original C RT, television set has been a comprehensive display device from the single functional shift that televiews also, and the interface of corresponding TV also develops into the satisfied different interfaces that require such as VGA, DVI, HDMI from original only video interface.Different interfaces just has different requirements, all requires to provide an identifying information to main frame such as interfaces such as VGA, DVI, HDMI, is convenient to main frame identification, selects a kind of display mode of the best then.Simultaneously, various copyright protection technologies have also proposed new requirement to TV.Such as up-to-date HDCP agreement, different identifying informations is arranged with regard to requiring different television sets.Therefore, in the production of television set, must increase writing of identifying information.Traditional mode of production all is before the TV production, writes data by the write device unification, and the identifying information of same like this batch TV is identical, can not satisfy I ²C bus EEPROM writes requirement.

Along with the progressively popularization of panel TV, the software of television set also becomes increasingly complex.Many I are arranged in the production ²The EEPROM of C needs write-in program.Traditional technical process all is to write before paster.This will open packing chip earlier, behind the write-in program, repack and just can carry out paster.This technological process has increased operation, has reduced production efficiency, has improved production cost simultaneously inevitably.

Summary of the invention

Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of online wiring method of TV set EEPROM is provided.It utilizes the original DVI of television set, HDMI or special interface, can pass through I to the eeprom chip on the circuit board ²The C agreement is online to be write.Simultaneously, do not need to open in advance to repack again after the packing, write-in program of eeprom chip, but directly paster, online writing then earlier.That is when detecting write-in program simultaneously, simplified production technology, improved production efficiency, reduced production cost.

In order to achieve the above object, the present invention includes following steps:

(1) on production line, make up the control write-in program the MCU master controller, with the HDMI of MCU master controller interconnection and DVI and special purpose interface and RS232 interface, with the internal storage space of MCU master controller interconnection, and power to the MCU master controller with power supply;

(2) by MCU control, the eeprom chip on the line is carried out pre-write operation, whether successfully judge whether the eeprom chip that exists needs to write, if exist then enter following step (5) according to operation by port HDMI;

(3) if there is no, then, eeprom chip is carried out pre-write operation, whether successfully judge whether the eeprom chip that exists needs to write, if exist then enter following step (5) according to operation by port DVI by MCU control;

(4) if there is no, then, eeprom chip is carried out pre-write operation, whether successfully judge whether the eeprom chip that exists needs to write according to operation by special purpose interface by MCU control, if exist then enter following step (5), if there is no then return step (2);

(5) adopt different address spaces to judge the range of capacity of eeprom chip;

(6) pass through the particular capacity that pre-wiring method is judged eeprom chip again;

(7) if particular capacity enough then call corresponding write-in program and write eeprom chip, if particular capacity is inadequately then the capacity of display is not enough.

Internal storage space can be divided into one to four part.

Main technical points is when judging whether a certain port exists chip in the software of the present invention, by writing technology in advance chip is carried out pre-write operation, whether successfully judges whether there is the chip that need write by decision operation.In the judgement of chip capacity, also adopted corresponding techniques, at first judged the range of capacity of chip, and then judged the particular capacity of chip by the way that writes in advance by the way that adopts different address spaces.

The control operation that the MCU master controller is used to write.Utilize the data channel of HDMI, DVI, DVI interface and other special purpose interface, can operate the display interior data according to the mode of main frame, and the conversion between the realization various interface.Internal storage space is used for the storage of pre-write-in program and data.Dispose different internal storage spaces, just can the EEPROM of different capabilities and kind be write.

If the data that write in producing all are identical, need reading in correct data before the work for the first time, that is these data are being kept in the internal storage space.When writing eeprom chip in advance,, just can write the data of reading in the internal storage space among the EEPROM of TV set circuit plate by the simple operations of MCU master controller.

The RS232 interface and the microcomputer of standard carry out communication, can carry out without any the writing of the data of rule, as long as write fashionable by the microcomputer reading of data at every turn.Also can off line use, data are calculated, write then, can guarantee that each machine has unique data according to certain requirement.The present invention is integrated on television set interface commonly used: VGA, DVI, HDMI, make full use of the inner all data channel of these interfaces, according to the mode of main frame the display interior data are operated, and can be implemented between the various interface and change.The present invention simultaneously supports the data of different capabilities to write: 1K, 2K, 4K, 8K, 16K, 32K etc.

Task of the present invention comes to this and finishes.

Write device of the present invention can solve the work that writes of all online datas substantially.And do not need to open in advance packing chip and then packing, and can directly use new chip to produce, in test, data are carried out online writing then.It had both solved the identical problem of same batch products data, had simplified production technology again, had improved production efficiency, had reduced production cost.It can be widely used in the online of various panel TV set EEPROM and write.The main characteristic of the present invention is to utilize to write technology and address space way of combining in advance, has improved intelligent level to greatest extent.

Description of drawings

Fig. 1 is a hardware configuration theory diagram of the present invention.

Fig. 2 is a program flow diagram of the present invention.

Embodiment

Embodiment 1.A kind of online wiring method of TV set EEPROM is as Fig. 1～shown in Figure 2.It may further comprise the steps:

Internal storage space is divided into one to four part.

The initialized source code of present embodiment is as follows:

ORG 0000H

LJMP INIT_SYS

ORG 0003H

LJMP INT0_INT ；INT0?DISABLE

NOP

LJMP SOFT_TRAP

ORG 000BH

RETI

ORG 0013H

LJMP INT1_INT ；INT0?DISABLE

NOP

LJMP SOFT_TRAP

ORG 001BH

RETI

ORG 0023H

RETI

NOP

ORG 002BH

RETI

NOP

ORG 0030H

LJMP INIT_SYS

MOV IE，#00

MOV PSW，#00

MOV SP，#SP_ADDR ；0D8H

ANL PCON，#00

CLR LED_RED

CLR LED_GRN

SETB BEL_ON

MOV IE，#0B5H

CALL RED

MOV R7，#50

CALL DLY_MS

Carrying out pre-write operation by port HDMI judges whether to exist the source code that need write chip as follows:

CALL CHECK4C02HDMI; The HDMI interface chip reads in advance

JB F0，MAIN_LOOP

SETB HDMI

Carrying out pre-write operation by port DVI judges whether to exist the source code that need write chip as follows:

CALL CHECK4C21DVI; The DVI interface chip reads in advance

JB F0，MAIN_LOOP

SETB DVI

Carrying out pre-write operation by private port judges whether to exist the source code that need write chip as follows:

CALL CHECK4C64; The special purpose interface chip reads in advance

JB F0，MAIN_LOOP

SETB MOTH

The source code that writes chip is as follows:

SNDDAT02HDMI：

CALL START; Send the iic bus initial conditions

MOV A, SLVADR02HDMI; Get controlled device bus address

CALL SENDBYTE; Send controlled device address

JB F0, SENDRETURN; Make mistakes and return

MOV A, SUBADR02HDMI; Get the element address

CALL SENDBYTE; The transmitting element address

JB F0, SENDRETURN; Make mistakes and return

MOV R0, #PXMTDAT; Get the first location of transmission buffer

SEND_NEXT：

MOV A ， @R0; Get the first location of transmission buffer content

CALL SENDBYTE; Send first location content (byte)

JB F0, SENDRETURN; Make mistakes and return

INC R0; Point to next byte

DJNZ BYTECNT, SEND_NEXT; Judge whether to send and finish, as

Fruit does not continue to send

CALL STOP; Send the iic bus initial conditions

DALAY10:; Delay procedure 10ms

MOV R7，#30H

D1：

MOV R6，#34H

D2：

DJNZ R6，D2

DJNZ R7，D1

SENDRETURN:; Return main program

RET

；***********************************************************

Send the byte program module

；************************************************************

SENDBYTE：

MOV BITCNT, #08H; The data length that transmits is 8

SENDBIT：；

RLC A; The data that send move to left, and send the position and send C

JC SEND1; Sending the position is that data bit 1 is sent in 1 forwarding

CLR SDA; Send data bit 0

SJMP SEND ；

SEND1：；

SETB SDA; Send data bit 1

NOP ；

SEND：；

NOP ；

SETB SCL; Put clock line for high, notify controlled device to begin

Receive and send data bit

NOP; Guarantee that the clock cycle is greater than 4us

NOP ；

NOP

NOP ；

CLR SCL; Vise bus and prepare to receive next data

DJNZ BITCNT, SENDBIT; Judge a byte data everybody whether

Transmission finishes, and does not continue to send

NOP ；

SETB SDA; 8 bit data send and finish, and discharge data wire,

Prepare to receive response bits

NOP ；

SETB SCL; Begin to receive response bits

NOP ；

CLR F0; Send the data error flag in advance clearly

JNB SDA, ACKEND; Judge whether to receive response bits, normal

Change ACKEND

SETB F0; Do not receive and reply, putting the error flag position is 1

ACKEND：

NOP

CLR SCL; Send and finish to vise bus, prepare next step

Send or receive data or carry out other processing

RET

；***********************************************************

Receive the data program module

；*********************************************************

RCVDATA02HDMI：

CALL START; Start iic bus

MOV A, SLVADR02HDMI; Get controlled device address

CALL SENDBYTE; Send controlled device address

JB F0, RCVRETURN; Make mistakes and return

MOV A, SUBADR02HDMI; Get the element address

CALL SENDBYTE; The transmitting element address

JB F0, RCVRETURN; Make mistakes and return

CALL START; Send out the repeated priming signal

MOV A, SLVADR02HDMI; Get controlled device address

SETB ACC.0; Putting controlled device is reading mode

CALL SENDBYTE; Send controlled device address

JB F0, RCVRETURN; Make mistakes and return

CLR ACKIC; The non-answer logo of clear reception,

Prepare to receive data

MOV R0, #PRCV02HDMI; Get the first location of reception buffer

DJNZ BYTECNT, RCVNEXT; If also do not receive

Data then change receive before BYTECNT-1 data

SJMP RCVLAST; Receive last data

RCVNEXT：

CALL RCVBYTE; Receive a byte data

MOV @R0, A; With the data that receive

Be stored in the reception buffer

INC R0; Point to and receive the buffering area next address

DJNZ BYTECNT, RCVNEXT; Do not receive and continue to receive

RCVLAST：

SETB ACKIC; Set receives non-replying

Sign, the answer logo of preparing after receiving last byte, to send out non-

CALL RCVBYTE; Receive last byte

MOV @R0，A

CALL STOP; Stop iic bus

RCVRETURN：

RET; Subprogram is returned

；********************************************************

Receive the byte program module

；************************************************************

RCVBYTE：

SETB SDA; Put data wire and be input side

Formula promptly discharges bus

MOV BITCNT, #08H; The data bit length that transmits is 8

RCV：

NOP

CLR SCL; Putting clock line is the low level standard

Receive data fully

NOP

SETB SCL; Putting clock line is that high level makes

Data on the data wire are effective

NOP

CLR C; Clear in advance CY=0, preparing will

The data that receive are put into ACC

JNB SDA, RCV0; Read data bit is if 0 is put

C=0 also changes the RCV0 data with clock information

SETB C; If 1 is put C=1

RCV0：

RLC A; The data bit that receives is put into ACC

NOP

DJNZ BITCNT, RCV; Do not receive for 8 and continue to receive

CLR SCL; Receive for 8 and put clock and number

Reply or non-answer signal for low being ready for sending according to line

NOP

CLR SDA

JNB ACKIC, SENDACKB; Need to judge whether to continue

Receive data, send acknowledgement number if need then change SENDACKB

SETB SDA; Send non-answer signal

SENDACKB：

NOP

SETB SCL; Putting clock line is that height is that response bits is effective

NOP

CLR SCL; Clear clock line vises iic bus

So that continue to receive data or send stop condition

CLR ACKIC; The non-answer logo of clear reception

RET

；＝＝＝＝＝＝＝＝＝＝＝＝READ?ALL?DATA?FROM?24C21＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

ALL4C21HDMI：

MOV R10，#40H

MOV R8，#0H ；ADDRESS?OF?THE

DATA?TO?READ

RDAHDMI：；NUMBER?OF?ONE?TIME

BY?READED

MOV BYTECNT，#2H

MOV A，#C21ADR

MOV SLVADR21，A

MOV A，R8

MOV SUBADR21，A ；SEND?THE?ADDRESS?OF?BYTE

CALL RCVDATA02HDMI

MOV A，@R0

MOV R3，A

DEC R0

MOV A，@R0

MOV R2，A

MOV A，#2H

ADD A，R8

MOV R8，A ；READ?NEXT?4?BYTE

DJNZ R10，RDAHDMI ；READ?TOTAL?OF?THE?DATA

NOP

RET

；SJMP RBYTE

；＝＝＝＝＝＝＝＝＝＝＝＝＝END?OF?READ?ALL?DATA?FROM?24C02

CHECK4C02HDMI：

MOV R12，#20H

MOV R8，#0H ；ADDRESS?OF?THE

DATA?TO?READ

MOV BYTECNT，#8H

MOV A，#C02ADR

MOV SLVADR02HDMI，A

MOV A，R8

MOV SUBADR02HDMI，A ；SEND?THE

ADDRESS?OF?BYTE

CALL RCVDATA02HDMI

RET

；＝＝＝＝＝＝＝＝＝＝＝＝＝READ?ALL?DATA?FROM?24C02＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

RD4C02HDMI：

MOV R12，#20H

MOV R8，#0H ；ADDRESS?OF?THE

DATA?TO?READ

RDALL：；NUMBER?OF

ONE?TIME?BY?READED

MOV BYTECNT，#8H

MOV A，#C02ADR

MOV SLVADR02HDMI，A

MOV A，R8

MOV SUBADR02HDMI，A ；SEND?THE

ADDRESS?OF?BYTE

CALL RCVDATA02HDMI

MOV A，#8H

ADD A，R8

MOV R8，A ；READ?NEXT?4?BYTE

DJNZ R12，RDALL ；READ?TOTAL?OF?THE?DATA

RET

；SJMP RBYTE

；＝＝＝END?OF?READ?ALL?DATA?FROM?24C21＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

；＝＝＝＝WRITE?THE?DATA?TO?24C02＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

WR4C02HDMI：

MOV R10，#0FFH

；MOV R5，#0H ；ADDRESS?OF?THE

DATA?TO?READ

MOV SUBADR02，#0H

WDA：；NUMBER?OF?ONE?TIME?BY?READED

MOV R0，#30H

MOV @R0，subadr02

MOV A，#C02ADR

MOV SLVADR02HDMI，A

MOV BYTECNT，#1H

RTY：；CALL RCVDATA21

CALL SNDDAT02HDMI

JB F0，RTY

MOV A，#1H

ADD A，SUBADR02HDMI

MOV SUBADR02HDMI，A

DJNZ R10，WDA ；READ?TOTAL?OF?THE?DATA

NOP

RET

；＝＝＝＝＝END OF THE WRITE

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

START：

；SEND?START，DEFINED?AS?HIGH-TO-LOW?SDA?WITH?SCL?HIGH.

；RETURN?WITH?SCL，SDA?LOW.

；RETURNS?CY?SET?IF?BUS?IS?NOT?AVAILABLE.

SETB?SDA

SETB?SCL

；VERIFY?BUS?AVAILABLE.

JNB SDA，X40；JUMP?IF?NOT?HIGH

JNB SCL，X40；JUMP?IF?NOT?HIGH

NOP ；ENFORCE?SETUP?DELAY?AND?CYCLE?DELAY

CLR SDA

NOP ；ENFORCE?HOLD?DELAY

NOP ；

CLR SCL

CLR C ；CLEAR?ERROR?FLAG

JMP X41

X40：

SETB?C ；SET?ERROR?FLAG

X41：

RET

STOP：

；SEND?STOP，DEFINED?AS?LOW-TO-HIGH?SDA?WITH?SCL?HIGH.

；SCL?EXPECTED?LOW?ON?ENTRY.RETURN?WITH?SCL，SDAHIGH.

CLR SDA

NOP ；ENFORCE?SCL?LOW?AND?DATA?SETUP

NOP

SETB?SCL

NOP ；ENFORCE?SETUP?DELAY

NOP ；

SETB?SDA

RET

Embodiment 1 utilizes the original DVI of television set, HDMI or special interface, can pass through I to the eeprom chip on the circuit board ²The C agreement is online to be write.Do not need to open in advance to repack again after the packing, write-in program of eeprom chip, but directly paster, online writing then earlier.That is when detecting write-in program simultaneously, simplified production technology, improved production efficiency, reduced production cost.During operate as normal, the write time of the EEPROM of a slice 1K position can not influence normal testing process less than 1 second, can cancel the operation that originally writes in advance again.It can be widely used in the online of various panel TV set EEPROM and write.

Claims

1. the online wiring method of a TV set EEPROM is characterized in that it may further comprise the steps:

2. according to the online wiring method of the described TV set EEPROM of claim 1, it is characterized in that said internal storage space is divided into one to four part.