Spi.h on Arduino supplies a constant SS, which allows code that uses SPI to be portable across Arduino boards and compatibles (like Windows DMAP for example).
We've chip select, CS0 and CS1 in Raspberry PI and CS0 in MBM defined in pins_arduino.h. I guess we could define SS as CS0 as well to make the code portable.
Spi.h on Arduino supplies a constant
SS
, which allows code that uses SPI to be portable across Arduino boards and compatibles (like Windows DMAP for example).