LCD : case inverted

[mischl]

hello

does anyone knows how it is possible to invert a char on a lcd (44780)?
means that all pixels of the 5*7 matrix for a sign will be inverted as in normal lcdout - so the black ones shine, and the hiddens are black


thanks a lot

[Archilochus]

As far as I know the 44780 does not allow for inverting.
You may be able to find a display type that is opposite of the normal (maybe called "Negative Transmissive").

Arch

[Acetronics2]

It's only possible by using special characters memory, addressing pixel per pixel.
a lookup table will help ...

There have been threads here on how to draw smileys ... or special symbols.

Alain

[Ceug2005]

http://www.seetron.com/an_cc1.htm
http://www.geocities.com/dinceraydin/lcd/charcalc.htm

[Acetronics2]

See also :

http://www.parallax.com/dl/sw/lcdcc.zip


Alain