SPI

SPI bus master driver. More...

Data Structures
struct	ove_spi_cfg
	SPI bus configuration descriptor. More...
struct	ove_spi_cs
	SPI chip-select descriptor. More...
struct	ove_spi_xfer
	SPI transfer segment for multi-segment transactions. More...

Enumerations
enum	ove_spi_mode_t { OVE_SPI_MODE_0 = 0 , OVE_SPI_MODE_1 = 1 , OVE_SPI_MODE_2 = 2 , OVE_SPI_MODE_3 = 3 }
	SPI clock polarity / phase mode. More...
enum	ove_spi_bit_order_t { OVE_SPI_MSB_FIRST = 0 , OVE_SPI_LSB_FIRST = 1 }
	SPI bit order. More...

Functions
static int	ove_spi_create (ove_spi_t *s, const struct ove_spi_cfg *c)
static void	ove_spi_destroy (ove_spi_t s)
static int	ove_spi_transfer (ove_spi_t s, const struct ove_spi_cs *cs, const void *tx, void *rx, size_t l, uint32_t t)
static int	ove_spi_write (ove_spi_t s, const struct ove_spi_cs *cs, const void *d, size_t l, uint32_t t)
static int	ove_spi_read (ove_spi_t s, const struct ove_spi_cs *cs, void *b, size_t l, uint32_t t)
static int	ove_spi_transfer_seq (ove_spi_t s, const struct ove_spi_cs *cs, const struct ove_spi_xfer *x, unsigned int n, uint32_t t)

Detailed Description

SPI bus master driver.

Provides a portable SPI master API with configurable clock, mode, thread-safe bus locking, and software chip-select management via GPIO.

Two allocation strategies are supported:

• _create() / _destroy() — unified API (heap or zero-heap macro).
• _init() / _deinit() — explicit static storage.

Note

Requires CONFIG_OVE_SPI.

Enumeration Type Documentation

ove_spi_mode_t

enum ove_spi_mode_t

SPI clock polarity / phase mode.

Enumerator
OVE_SPI_MODE_0	CPOL=0, CPHA=0.
OVE_SPI_MODE_1	CPOL=0, CPHA=1.
OVE_SPI_MODE_2	CPOL=1, CPHA=0.
OVE_SPI_MODE_3	CPOL=1, CPHA=1.

ove_spi_bit_order_t

enum ove_spi_bit_order_t

SPI bit order.

Enumerator
OVE_SPI_MSB_FIRST	Most significant bit first (common).
OVE_SPI_LSB_FIRST	Least significant bit first.