Hi,
I've only had experience with two HD44780 displays and they're both able to use 4-bit mode to save pins. My question is, are all HD44780 displays able to use 4-bit mode? If not, any way to tell which supports? Thanks.
Probably all of them support it, as HD44780 designates the controlling unit of the display and originally it had it. But as most of the displays are clones of the Hitachi one it's hard to tell with absolute certainty. I usually am able to find the datasheet of the display where such things as data modes are mentioned.
By and large yes. I have yet to come across one that doesn't support 4 bit operation.
But as most of the displays are clones of the Hitachi one it's hard to tell with absolute certainty.
If they do not support the 4-bit interface then they are not clones.
Don
Thanks a lot guys. By the way, I have also found online that SPLC780C controller made by Sunplus is also compatible with HD44780, in case someone bumps into this controller:)
FYI, I found a website that sells cheap LCD's. Have yet to find out its quality. Someone several years ago claimed to have waited quite long for shipping.
http://www.eio.com/c-163-character-lcd.aspx?SectionIDs=10&CreatedOn=&ManuID=&ViewType=2&SortFilter=3&PageSize=12
I've not tried it yet but there is a modification to the LCD library for LCD's that have two enable pins. I intend to try that with two LCD's as soon as I can get another one.
I've not tried it yet but there is a modification to the LCD library for LCD's that have two enable pins. I intend to try that with two LCD's as soon as I can get another one.
That's a whole different topic.
You don't really need that enhanced library for simple control of two LCDs, you can simply use two instances of the regular LiquidCrystal library. Look here http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1265969050/0 and scroll down for the pictures.
Don