serial communication with 4*16 LCD

Using Arduino Project Guidance
#1

hello friends,

i am just beginner with arduino. i have successfully communicated 4 by 16 LCD with one to one connection with LCD pins d4, d5, d6, d7 to Arduino pins 5, 4, 3, 2 as in example. I found some lcds are serially enabled, i mean to communicate with just to pins Rx ant Tx. So what is the intermediate logic that converts serial data into digital that understood by LCD? How can i make my LCD serially enable? ( i mean with some kind of decoder or something?)

Thanks, Bhargav.

#2

I found some lcds are serially enabled,

Yes they have a special circuit on them to convert the data from serial to parallel. This is normally a small processor like the arduino.

How can i make my LCD serially enable?

You don't want to do that because there is only one serial port on a Uno and that is used in uploading sketches. If you want to use fewer pins then look at using the I2C bus and an I2C port expander. Read this:- http://playground.arduino.cc/Code/LCD

#3