hello,
i want to ask anyone who's know about lcd program, when i use lcd 16x2 with this routine program its appear in lcd. this is a routine for 16x2: -----------------------------------------------
startup: mov a,#38h
acall comnwrt
acall delay
mov a,#0eh
mov a,#01h
ret
comnwrt: mov output,a
clr rs
clr rw
setb e
clr e
datawrt: mov p1,a
setb rs
---------------------------------------------------
anyone who's know how to change this program to lcd 20x2, because i use 20x2 lcd, i can do the 16x2 lcd program but not 20x2..
or maybe the program its same? because my problem, the character doesn't appear in a second line..
what can i do? please help me..
I feel a few comments in your code would make our task of answering your question a bit simpler.
Though, chances are, if you take the time to write comments to the code, you may get sufficient insight into the code to understand what you have to do.
The code isn't posted as code, but as text.
The code does not contain any comments.
The code calls a function that ends with a delay - and the caller then does one more delay. Why always two calls to delay? Because the code isn't documented, so you didn't notice the first call?
The posted code is not compilete. No code shows where the first 'ret' will return to.
The posted code has a label 'datawrt' that is never referenced. Where is the text you are trying to send to the display?