I have a procram written in C usint Atmel Studio that I wish to add this display to.

In the header it mentions writing two functions before I can use the screen "Digole_write and Digole_read"

Does it matter what the Byte sent is?

Also how do I define it to use I2C and which pins to use (ATMega 328P) ?

Do you have an example to get me started?