spi.h File Reference

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Macros
#define	SPI_POLARITY_IDLE_LOW   0
#define	SPI_POLARITY_IDLE_HIGH   1
#define	SPI_PHASE_EDGE_LEADING   0
#define	SPI_PHASE_EDGE_TRAILING   1
#define	SPI_BIT_ORDER_MSB_FIRST   0
#define	SPI_BIT_ORDER_LSB_FIRST   1

Detailed Description

This file defines constants used in spi0_master.h and spi1_master.h.

Definition in file spi.h.

Macro Definition Documentation

#define SPI_BIT_ORDER_LSB_FIRST   1

The least-significant bit is transmitted first.

Definition at line 22 of file spi.h.

#define SPI_BIT_ORDER_MSB_FIRST   0

The most-significant bit is transmitted first.

Definition at line 19 of file spi.h.

#define SPI_PHASE_EDGE_LEADING   0

Data is sampled/transmitted on the leading edge, when the clock line transitions from idle to active.

Definition at line 14 of file spi.h.

#define SPI_PHASE_EDGE_TRAILING   1

Data is sampled/transmitted on the trailing edge, when the clock like transitions from active to idle.

Definition at line 16 of file spi.h.

#define SPI_POLARITY_IDLE_HIGH   1

The SCK line will be high when no data is being transferred.

Definition at line 11 of file spi.h.

#define SPI_POLARITY_IDLE_LOW   0

The SCK line will be low when no data is being transferred.

Definition at line 9 of file spi.h.