@superholz to add to what @ScruffR said, calling SPI.begin() with no argument will set the A2 (SS) pin as an output and set it HIGH. When a pin is specified the same will be done but with the specified pin.
@superholz to add to what @ScruffR said, calling SPI.begin() with no argument will set the A2 (SS) pin as an output and set it HIGH. When a pin is specified the same will be done but with the specified pin.