I am working with LCD HD44780 using pic18F1320. Can some provide me with the initialization code...

I am working with LCD HD44780 using pic18F1320. Can some provide me with the initialization code for LCD. Or the code I have to write to initializied LCD.

Expert Solution

The initialization code for LCD:

LCD_data equ P2 ;LCD Data port
LCD_D7 equ P2.7 ;LCD D7/Busy Flag
LCD_rs equ P1.0 ;LCD Register Select
LCD_rw equ P1.1 ;LCD Read/Write
LCD_en equ P1.2 ;LCD Enable
LCD_init:
mov LCD_data,#38H ;Function set: 2 Line, 8-bit, 5x7 dots
clr LCD_rs ;Selected command register
clr LCD_rw ;We are writing in instruction register
setb LCD_en ;Enable H->L
clr LCD_en
acall LCD_busy ;Wait for LCD to process the command
mov LCD_data,#0FH ;Display on, Curson blinking command
clr LCD_rs ;Selected instruction register
clr LCD_rw ;We are writing in instruction register
setb LCD_en ;Enable H->L
clr LCD_en
acall LCD_busy ;Wait for LCD to process the command
mov LCD_data,#01H ;Clear LCD
clr LCD_rs ;Selected command register
clr LCD_rw ;We are writing in instruction register
setb LCD_en ;Enable H->L
clr LCD_en
acall LCD_busy ;Wait for LCD to process the command
mov LCD_data,#06H ;Entry mode, auto increment with no shift
clr LCD_rs ;Selected command register
clr LCD_rw ;We are writing in instruction register
setb LCD_en ;Enable H->L
clr LCD_en
acall LCD_busy ;Wait for LCD to process the command
ret ;Return from routine

Manojponduru answered 1 year ago

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