I2C is a communical protocol which is used to communicate with I2C devices by using only two wires namely SCL and SDA

I2C communication uses two signal wire namely SCL and SDA .

For interfacing DUE with DUE we have to assign one as master and another one as slave.

Master:Burn master code from wire library to one DUE board 

Slave :Burn Slave code from Wire library  to another Library code