help me in interfacing a lcd with a 8051 microcontroller

[embebed]

hey,
someone plz help me in understanding the initialization code for interfacing a lcd
i am using keil software and i am doing programming in c language although i have read many initialization programs written in c but i am not able to understand what is the purpose of each command we send during initialization and why we send them please help me to understand these commands please

 

[klystron]

Google 8051 lcd and find url LCD Tutorial for interfacing with Microcontrollers : 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes

 

[malik_zohaib]

DNA TECHNOLOGY - LCD Interfacing To 8051 in 4bit mode
there is another one.

 

[Bakshish Singh]

Hi I'm having problem in Proteus while interfacein LCD with AT89C51.
Hereby I'm attaching the circuit diagram and my program.
Please help me to get through this . .
Thank you in advance

 

[Bakshish Singh]

Please Please any one help me here.
Its really urgent.>>>....
Please

 

[tinto]

Which is the LCD you are using? Can you please specify the model?

 

[nandhu015]

Please Please any one help me here.
Its really urgent.>>>....
Please

No one is going to help you unless you are clear about what you want

 

[Bakshish Singh]

I'm using LM032L LCD.
I've attached the attachments of my design with this.
Please take a look at that also . . .

 

[Bakshish Singh]

My problem is that when I Simulate my design by using the program I've written, It does not show anything in the LCD.
Not even the cursor blinks,
I want to know whether it is fault with my design or my programming or both.
Please help me in this.

 

[tinto]

I went through your code. I will explain what those commands mean (to the best of my knowledge; I am also a beginner)

MOV A,#38H
This command will set the lcd to 8 bit interface mode. You might know that lcd can be interfaced in 4 bit and 8 bit mode.Also 2 lines will be used for displaying data.

MOV A,#0EH
This will turn on the display. The cursor is also turned on with cursor blink off.

MOV A,#01H
This will clear the display.

MOV A,#06H
This will increment the cursor position.

MOV A,#80H
This will set the DDRAM address to 0000000.(starting address)

MOV A,#'B'
ACALL DAT
NOP
ACALL DELAY
MOV A,#'I'
ACALL DAT
NOP
ACALL DELAY
MOV A,#'N'
ACALL DAT
NOP
ACALL DELAY
MOV A,#'I'
ACALL DAT
NOP
ACALL DELAY

I think this will display 'BINI' on the screen.


To know the commands for the lcd, just google for it. You will find it.

 

[kandhu26]

As per LCD datasheet...
STEP1: Write Function set [0x38] into Command Register.. [8 bit interfacing, Multiple Line, 5x7 font size]
STEP2: Give 4ms delay
STEP3: Same Step 1
STEP4: Give 1ms delay
STEP5: Same Step 1
STEP6: Write the cursor/display shift [0x1C] into Command Register with delay... [Shift Entire display into right]
STEP7: Write Display ON/OFF control [0x0C] into Command Register with Delay... [No cursor and No blink]
STEP8: Write Entry mode set [0x06] into Command Register with Delay... [Increment without shift]
STEP9: Write Home cursor [0x02] into command register with Delay...[Home cursor]
STEP10: Write Clear display [0x01] into command register with delay... [Clear Display]

The above said all the things meaning for LCD [2x16] initialization... All the details is clearly given in datasheet...

 

[Bakshish Singh]

I didn't get the simulation working yet.
I tried the above code also.
But it didn't helped me.
Please, if their are any tutorials regarding LCD simulation in proteus, let me know.
I want urgent help.