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Note:
direction of the user defined SPI pins.
The following code examples show how to initialize the SPI as a Master and how to perform a
simple transmission. DDR_SPI in the examples must be replaced by the actual Data Direction
Register controlling the SPI pins. DD_MOSI, DD_MISO and DD_SCK must be replaced by the
actual data direction bits for these pins. For example, if MOSI is placed on pin PB5, replace
DD_MOSI with DDB5 and DDR_SPI with DDRB.
Table 18-1.
SPI pin overrides
Pin
Direction, master SPI
Direction, slave SPI
MOSI
User defined
Input
MISO
Input
User defined
SCK
User defined
Input
SS
User defined
Input