AVR-Chat

On Feb 15, 2007, at 3:59 PM, kernels_nz wrote:

> 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.

IIRC when top line is dark and bottom is not the controller has not  
been initialized.

If it was only a matter of contrast then both top and bottom would be  
equally dark.

When the Hitachi controller powers up it drives all the pixels in the  
top line until its initialized in the 2 line mode.

--
David Kelly N4HHE, dkelly@HiWAAY.net
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Whom computers would destroy, they must first drive mad.