I do have the phone, then I can monitor the communication. I am suposing it is i2c, then the first thing I need to know is what is the address. With this, I supose I can use try-and-error to figure out the communication.
This is the display: http://picasaweb.google.es/alejandro.anv/Aaa#5282709383659630962
Then... will try to make a little protocol analyzer. One question: Is there any way to use the wire library to monitor the i2c bus? Something like promiscuous mode or something? or I will need to write a little program for this?
By the way... ¿How do I upload an image to the forum?