LCD controller ST7066

Forum 2005-2010 (read only) Hardware Interfacing
1

i have recently obtained a 16 x 4 LCD display.

it has the standard 16 pins compatible with the HD44780. I have the display working to a point with the standard and 440 extended LCD libraries. The Row offset is incorrect and it appears to have an extended character set.

I am finding that it isnt totally compatible as it use a different LCD controller : ST7066

http://www.datasheetcatalog.org/datasheets2/32/326069_1.pdf

does anyone have a modified library to work with this ST7066? (save me looking into it)

TIA

Andy

2

The Row offset is incorrect...

This is an old, known, problem with the LiquidCrystal library. Getting it fixed is another thing....

Look here:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1253367247/6
and here:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1268497999/1

For an explanation of the reason for the problem follow the LCD Addressing link at http://web.alfredstate.edu/weimandn.

... and 440 extended LCD libraries.

I thought John took care of this problem in LiquidCrystal440.

and it appears to have an extended character set

I believe that all of the LCD controllers have an extended character set - but they are not all exactly the same.

Don