Apparent slow lcd on startup

Forum 2005-2010 (read only) Hardware Interfacing
1

I'm using an HD44780 2x16 LCD in 4 bit mode with my arduino. Most times, when I power up the arduino, the LCD does not respond unless I push the reset button. Doesn't the liquidcrystal library have some delay built in? What could I change to help this?

2

flyboy:

There seem to be many people having trouble with the liquidCrystal library, especially in 4-bit mode. I have written a replacement for liquidCrystal.cpp, the main part of the library. It's only been available for a week and I haven't had much feedback, so I would really appreciate it if you could try it out. You can find the program and some of my thoughts on why liquidCrystal doesn't work all the time at http://web.alfredstate.edu/weimandn.

floresta

3

Very nice. I'm presently using my LCD display with a serial backpack (I'm stingy about using I/O pins up on my development system) so I won't be able to test out your code at this time.

Thanks for your contribution to the cause as open source contributors are one of our most valuable assists.

Lefty

4

The startup portion is much better, however, now I have some strange characters appearing in the lower part of my screen. I'll try to get some video to post for you sometime tomorrow (Sunday, eastern time USA).