So, basically, I want to use a Raspberri Pi as a Master and a SAMD20 as a slave for I²C communication.
Settings the Raspberry as a Master have been a breeze and I can easily communicate with several I²C chip already.
On the other hand, I'm completely lost with the SAMD20. I've tried to start a new "SAM SERCOM I2C Slave with Callbacks" projet and I'm not sure how to do anything.
Some help here?