spi enum example

spi.h

typedef enum {
	SPI_CLOCK_DIV_2   = ((1<<SPI2X) | (0<<SPR1) | (0<<SPR0)),
	SPI_CLOCK_DIV_4   = ((0<<SPI2X) | (0<<SPR1) | (0<<SPR0)),
	SPI_CLOCK_DIV_8   = ((1<<SPI2X) | (0<<SPR1) | (1<<SPR0)),
	SPI_CLOCK_DIV_16  = ((0<<SPI2X) | (0<<SPR1) | (1<<SPR0)),
    SPI_CLOCK_DIV_32  = ((1<<SPI2X) | (1<<SPR1) | (0<<SPR0)),
	SPI_CLOCK_DIV_64  = ((0<<SPI2X) | (1<<SPR1) | (0<<SPR0)),
	SPI_CLOCK_DIV_128 = ((0<<SPI2X) | (1<<SPR1) | (1<<SPR0))
} spi_clock_freq;


typedef enum {
	SPI_MODE_0 = ((0<<CPOL) | (0<<CPHA)),
	SPI_MODE_1 = ((0<<CPOL) | (1<<CPHA)),
	SPI_MODE_2 = ((1<<CPOL) | (0<<CPHA)),
	SPI_MODE_3 = ((1<<CPOL) | (1<<CPHA))
} spi_mode_number;


typedef enum {
	SPI_LSB = (1<<DORD),
	SPI_MSB = (0<<DORD)
} spi_data_order;

typedef enum {
	SPI_MASTER = (1<<MSTR),
	SPI_SLAVE  = (0<<MSTR)
} spi_mode_type;