Good day. Now I am trying to learn SPI coding using Arduino Uno based board using the ATMega 328P. I am trying to connect the Uno to the ATMega 2560 board.
While programming the ATMega328P I got some message in the Atmel Studio: "Would you like this fuse to be changed back?" I ignored this but somehow from 16MHz the ATMega328P clock turned to 1MHz. Can someone tell me what happened?