Well, I got a Hantronix 20x2 display HDM20216l and got it wired up. After having trouble with it needing -5v, I got it to display somewhat. Now Its giving me what I guess is some kind of error. It says Test LCD X-Cons. Pin: D0. I checked and its good. Any ideas?
So, you see the message “Test LCD X-Cons.”, and on the second line “Pin: D0” on the LCD?
Fully written this means “LCD Crossconnection Test. Pin D0”
On the other hand: if you see this message, your LCD works ok and you don’t need to do any checks with the lcd_interconnection_test application anymore.
Just upload another application and have fun! 
Best Regards, Thorsten.