Dear friends

actually what is happenning is .....
-- dark rectangle boxes are being displayed long with the text which i have send. ( see by tilting the lcd display text is visible , but directly only dark boxes are visible)
-- second line is clear with out dark rectangle boxes and I tryed to display the same text still it uses the same first line with same problem.
-- as soon as i turned on my board same rectangle boxes appears on lcd display before initializing display and after initialization also it continueus to be there. (is it not getting initialized properly...?)

here is my code( which I had got from 8052 website...


DB0 EQU P1.0
DB1 EQU P1.1
DB2 EQU P1.2
DB3 EQU P1.3
DB4 EQU P1.4
DB5 EQU P1.5
DB6 EQU P1.6
DB7 EQU P1.7
EN EQU P3.4
RS EQU P2.0
RW EQU P3.3
DATAPORT EQU P1

ORG 030H

LCALL INIT_LCD
LCALL CLEAR_LCD

MOV A,#'H'
LCALL WRITE_TEXT
MOV A,#'E'
LCALL WRITE_TEXT
MOV A,#'L'
LCALL WRITE_TEXT
MOV A,#'L'
LCALL WRITE_TEXT
MOV A,#'O'
LCALL WRITE_TEXT

MOV A,#'W'
LCALL WRITE_TEXT
MOV A,#'O'
LCALL WRITE_TEXT
MOV A,#'R'
LCALL WRITE_TEXT
MOV A,#'L'
LCALL WRITE_TEXT
MOV A,#'D'
LCALL WRITE_TEXT




SJMP $

INIT_LCD:
SETB EN
CLR RS
MOV DATAPORT,#38h
CLR EN
LCALL WAIT_LCD
SETB EN
CLR RS
MOV DATAPORT,#0Eh
CLR EN
LCALL WAIT_LCD
SETB EN
CLR RS
MOV DATAPORT,#06h
CLR EN
LCALL WAIT_LCD
RET


CLEAR_LCD:
SETB EN
CLR RS
MOV DATAPORT,#01h
CLR EN
LCALL WAIT_LCD
RET

WRITE_TEXT:
SETB EN
SETB RS
MOV DATAPORT,A
CLR EN
LCALL WAIT_LCD
RET

I got structed with this problem ...and couldn't progress in my project..

pl help me ..

with warm regards
P.Ravi
Kalpakkam,TN
ravi.p@rocketmail.com
or pravi@igcar.ernet.in