sd.h File Reference

Public API for SD subsystem. More...

#include <zephyr/device.h>
#include <zephyr/drivers/sdhc.h>
#include <zephyr/kernel.h>

Go to the source code of this file.

Data Structures
struct	sdio_func
	SDIO function definition. More...
struct	sd_card
	SD card structure. More...

Enumerations
enum	card_status { CARD_UNINITIALIZED = 0 , CARD_ERROR = 1 , CARD_INITIALIZED = 2 }
	card status. More...
enum	card_type { CARD_SDMMC = 0 , CARD_SDIO = 1 , CARD_COMBO = 2 , CARD_MMC = 3 }
	card type. More...

Functions
int	sd_init (const struct device *sdhc_dev, struct sd_card *card)
	Initialize an SD device.
bool	sd_is_card_present (const struct device *sdhc_dev)
	checks to see if card is present in the SD slot

Detailed Description

Public API for SD subsystem.

Enumeration Type Documentation

card_status

enum card_status

card status.

Used internally by subsystem.

Enumerator
CARD_UNINITIALIZED	card has not been initialized
CARD_ERROR	card state is error
CARD_INITIALIZED	card is in valid state

card_type

enum card_type

card type.

Used internally by subsystem.

Enumerator
CARD_SDMMC	SD memory card.
CARD_SDIO	SD I/O card.
CARD_COMBO	SD memory and I/O card.
CARD_MMC	MMC memory card.

Function Documentation

sd_init()

int sd_init	(	const struct device *	sdhc_dev,
		struct sd_card *	card
	)

Initialize an SD device.

Initializes an SD device to use with the subsystem. After this call, only the SD card structure is required to access the card.

Parameters

sdhc_dev	SD host controller device for this card
card	SD card structure for this card

Return values

0	card was initialized
-ETIMEDOUT	card initialization timed out
-EBUSY	card is busy
-EIO	IO error while starting card

sd_is_card_present()

bool sd_is_card_present

(

const struct device *

sdhc_dev

)

checks to see if card is present in the SD slot

Parameters

sdhc_dev

SD host controller to check for card presence on

Return values

true	card is present
false	card is not present