AVR-Chat

Hi Mark,

Many may have suggested this to you, but your display is probably
working fine, just way too much contrast. Made the same mistake when I
used my first LCD module many years ago. Put a 10k pot between Vcc and
GND with the output going to the contrast pin, and adjust until you
see text. Contrast pin is usually pin #3 on most LCD modules.

Cheers
Hein B
Auckland, New Zealand.

--- In AVR-Chat@yahoogroups.com, Mark Weston <weston54@...> wrote:
>
> Thank you everyone for your responses.  As it happens I have a 10mhz
crystal across 4 and 5 on the PCB already, with attendant 18pf caps to
GND.  I'm going to remove the crystal and try the AVRDUDE command line
fix, that looks like the best at this point.  If that doesn't work,
I'll try the signal injector.  Thanks again, and have a great day.
> 
> Say, the cause of this whole nightmare was my attempt at getting an
LCD working correctly from the 2313.  Sadly though, when I plug in the
LCD I just get the first line showing as a set of 16 black squares.  
> 
> My connections are RS @PB2, E @ PB3, DB4 @ PB4, DB5 @ PB5, etc.  I'm
using Bascom to program and I've used the Config LCDPIN statement to
set up how the LCD is connected, but I get the dark line stuff right
from the start, even before I programmed the chip, so I suspect
there's something else afoot here.  GND is connected, VCC is 5v, 
contrast runs to a 2.2K to GND.  Pin 5 to GND.  
> 
> Any thoughts on where to look here. Oh yes, the LCD is a 5v 44780
standard 16x2 LCD with a 5v contrast.
> 
> Mark Weston
>  		
> ---------------------------------
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> 
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