diff options
Diffstat (limited to 'LUFA/Drivers/Peripheral/SPI.h')
| -rw-r--r-- | LUFA/Drivers/Peripheral/SPI.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/LUFA/Drivers/Peripheral/SPI.h b/LUFA/Drivers/Peripheral/SPI.h index d8002b2e3..4e1fd09ce 100644 --- a/LUFA/Drivers/Peripheral/SPI.h +++ b/LUFA/Drivers/Peripheral/SPI.h @@ -67,6 +67,8 @@ /* Public Interface - May be used in end-application: */ /* Macros: */ + /** \name SPI Prescaler Configuration Masks */ + //@{ /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 2. */ #define SPI_SPEED_FCPU_DIV_2 SPI_USE_DOUBLESPEED @@ -87,31 +89,44 @@ /** SPI prescaler mask for SPI_Init(). Divides the system clock by a factor of 128. */ #define SPI_SPEED_FCPU_DIV_128 ((1 << SPR1) | (1 << SPR0)) + //@} + /** \name SPI SCK Polarity Configuration Masks */ + //@{ /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the rising edge. */ #define SPI_SCK_LEAD_RISING (0 << CPOL) /** SPI clock polarity mask for SPI_Init(). Indicates that the SCK should lead on the falling edge. */ #define SPI_SCK_LEAD_FALLING (1 << CPOL) + //@} + /** \name SPI Sample Edge Configuration Masks */ + //@{ /** SPI data sample mode mask for SPI_Init(). Indicates that the data should sampled on the leading edge. */ #define SPI_SAMPLE_LEADING (0 << CPHA) /** SPI data sample mode mask for SPI_Init(). Indicates that the data should be sampled on the trailing edge. */ #define SPI_SAMPLE_TRAILING (1 << CPHA) - + //@} + + /** \name SPI Data Ordering Configuration Masks */ + //@{ /** SPI data order mask for SPI_Init(). Indicates that data should be shifted out MSB first. */ #define SPI_ORDER_MSB_FIRST (0 << DORD) /** SPI data order mask for SPI_Init(). Indicates that data should be shifted out MSB first. */ #define SPI_ORDER_LSB_FIRST (1 << DORD) - + //@} + + /** \name SPI Mode Configuration Masks */ + //@{ /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */ #define SPI_MODE_SLAVE (0 << MSTR) /** SPI mode mask for SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */ #define SPI_MODE_MASTER (1 << MSTR) - + //@} + /* Inline Functions: */ /** Initialises the SPI subsystem, ready for transfers. Must be called before calling any other * SPI routines. |