init_SPI(): set Slave Select pin high prior to enabling the SPI module, so that no slave peripheral is accidentally selected by an unintentional low signal on the SS pin.
init_SPI(): set Slave Select pin high prior to enabling the SPI module, so that no slave peripheral is accidentally selected by an unintentional low signal on the SS pin.

tommytwoeyes/AVR_AVR_SPI,tommytwoeyes/AVR_AVR_SPI