Character Based LCD library recommended API

Forum 2005-2010 (read only) Software Development
#1

All,

I have put some documentation together for those of you working on libraries for LCD displays. I have created a page in the playground with the API specifications http://www.arduino.cc/playground/Code/LCDAPI

I currently have both of my i2c LCD libraries compliant, and the standard LiquidCrystal libraries are compliant with the functions that are implemented.

I welcome any comments or suggestions on what has been done already.

Dale

#2

For those looking for a way and library to convert a parallel HD44780 compatible LCD to serial (I2C): I needed the exact same thing and wired it up using a PCF8574 and modified the standard LiquidCrystal to talk I2C to the display. The new library named “LiquidCrystal_I2C” can be found on the playground. It should be function compatible (forgive me if I missed one) with both the standard LiquidCrystal library and the API recommendations listed by Dale. With a few additional components it also supports backlight switching. Connection details, PCF8574 datasheet and examples are in the zip file http://www.arduino.cc/playground/Code/LCDAPI

Enjoy,

Mario

#3

Hey, Dale, the skeleton lib link on the LCDAPI page does not work.

Thanks Rock.

#4

Rock,

Thanks for the heads up. I have updated the link as well as a few others that broke. Seems apple has changed the way you reference files from their mobile me service.

Dale

#5