lcd problems

[Nitro]

i am not new to pics, but very new to picbasic, and i can only get a few tyings to work.
right now i'm interested in controlling a 2*20 line lcd, i have writen numerous programs for lcd's in assembler, but couldn't get even a blip though pbp demo

i'm sure you must get annoid of nubies trying to leech knowledge, but this is trhe only sensible place i found to learn pb.

i tryed thius code on the 877 to no success.
please help me!
Pause 500 ' Wait for LCD to startup

loop:
Lcdout $fe, 1 ' Clear LCD screen
Lcdout "Hello" ' Display Hello
Pause 500 ' Wait .5 second

Lcdout $fe, 1 ' Clear LCD screen
Lcdout "World"
Pause 500 ' Wait .5 second

Goto loop ' Do it forever

[BobK]

Hi Nitro,

So where's the beginning part of the code that sets up the 16F877 with the LCD defines? How can we help you without all of the information?

BobK

[Bonxy]

Hi Nitro

BobK suggests what i was going to say that the defines are missing.
You have to define the port and pins you want to use for your lcd.
Once you sort that out try this little file i made it might help you.

http://www.picbasic.co.uk/forum/showthread.php?t=2701

--------
Brian

[Nitro]

thanx for the reply, but as far as understand there are preset pin configurastions on portA and one on portB as shown in the manual

...it seems there is something wrong with my pic, i'll try another on one of my other lcd's. i'll see if the problem persists.

... tried it. now it does is devour pics faster. i didnt even get anything done before the pic blew out! maby the voltage on my breadboard not 5v? thanx though.

[BobK]

Hi Nitro,

Yes that is true, PBP assumes that the LCD is connected to PortA.0 to PortA.3 for the 4 bit data lines and RS to PortA.4 and enable to PortB.3. I have found throughout life not to assume anything! Put it in writing, as the lawyers say. Did you also disable the analog features? Do you have a pull up resistor on PortA.4?

It sounds from your last post that you have a more important problem. Hope the above helps when you have the other problems under control.

BobK

[Nitro]

thanks for all the help, i should be able to get it going.

[Bonxy]

Hi Nitro

This is the lcd defines i always use, just alter it to what your configuration is.

DEFINE LCD_DREG PORTD
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTE
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTE
DEFINE LCD_EBIT 1

DEFINE OSC 4

------------------
Brian