#define AO_SPI_SPEED_6MHz 8
#define AO_SPI_SPEED_4MHz 12
#define AO_SPI_SPEED_2MHz 24
#define AO_SPI_SPEED_1MHz 48
#define AO_SPI_SPEED_500kHz 96
#define AO_SPI_SPEED_250kHz 192
#define AO_SPI_SPEED_6MHz 8
#define AO_SPI_SPEED_4MHz 12
#define AO_SPI_SPEED_2MHz 24
#define AO_SPI_SPEED_1MHz 48
#define AO_SPI_SPEED_500kHz 96
#define AO_SPI_SPEED_250kHz 192