SPI Emulation Interface

SPI Emulation Interface. More...

Data Structures
struct	spi_emul
struct	spi_emul_api

Typedefs
typedef int(*	spi_emul_io_t) (struct spi_emul *emul, const struct spi_config *config, const struct spi_buf_set *tx_bufs, const struct spi_buf_set *rx_bufs)

Functions
int	spi_emul_register (const struct device *dev, const char *name, struct spi_emul *emul)
uint32_t	spi_emul_get_config (const struct device *dev)

Detailed Description

SPI Emulation Interface.

Typedef Documentation

spi_emul_io_t

typedef int(* spi_emul_io_t) (struct spi_emul *emul, const struct spi_config *config, const struct spi_buf_set *tx_bufs, const struct spi_buf_set *rx_bufs)

#include <include/drivers/spi_emul.h>

Passes SPI messages to the emulator. The emulator updates the data with what was read back.

Parameters

emul	Emulator instance
config	Pointer to a valid spi_config structure instance. Pointer-comparison may be used to detect changes from previous operations.
tx_bufs	Buffer array where data to be sent originates from, or NULL if none.
rx_bufs	Buffer array where data to be read will be written to, or NULL if none.

Return values

0	If successful.
-EIO	General input / output error.

Function Documentation

spi_emul_get_config()

uint32_t spi_emul_get_config

(

const struct device *

dev

)

#include <include/drivers/spi_emul.h>

Back door to allow an emulator to retrieve the host configuration.

Parameters

dev	SPI device associated with the emulator

Returns

Bit-packed 32-bit value containing the device's runtime configuration

spi_emul_register()

int spi_emul_register	(	const struct device *	dev,
		const char *	name,
		struct spi_emul *	emul
	)

#include <include/drivers/spi_emul.h>

Register an emulated device on the controller

Parameters

dev	Device that will use the emulator
name	User-friendly name for this emulator
emul	SPI emulator to use

Returns

0 indicating success (always)