sdmmc.h File Reference

Public API for SD memory card subsystem. More...

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

Go to the source code of this file.

Functions
int	sdmmc_write_blocks (struct sd_card *card, const uint8_t *wbuf, uint32_t start_block, uint32_t num_blocks)
	Write blocks to SD card from buffer. More...
int	sdmmc_read_blocks (struct sd_card *card, uint8_t *rbuf, uint32_t start_block, uint32_t num_blocks)
	Read block from SD card to buffer. More...
int	sdmmc_ioctl (struct sd_card *card, uint8_t cmd, void *buf)
	Get I/O control data from SD card. More...

Detailed Description

Public API for SD memory card subsystem.

Function Documentation

sdmmc_ioctl()

int sdmmc_ioctl	(	struct sd_card *	card,
		uint8_t	cmd,
		void *	buf
	)

Get I/O control data from SD card.

Sends I/O control commands to SD card.

Parameters

card	SD card
cmd	I/O control command
buf	I/O control buf

Return values

0	IOCTL command succeeded
-ENOTSUP	IOCTL command not supported
-EIO	I/O failure

sdmmc_read_blocks()

int sdmmc_read_blocks	(	struct sd_card *	card,
		uint8_t *	rbuf,
		uint32_t	start_block,
		uint32_t	num_blocks
	)

Read block from SD card to buffer.

Reads blocks into SD buffer from SD card. For best performance, this buffer should be aligned to CONFIG_SDHC_BUFFER_ALIGNMENT

Parameters

card	SD card to read from
rbuf	read buffer
start_block	first block to read from
num_blocks	number of blocks to read

Return values

0	read succeeded
-EBUSY	card is busy with another request
-ETIMEDOUT	card read timed out
-EIO	I/O error

sdmmc_write_blocks()

int sdmmc_write_blocks	(	struct sd_card *	card,
		const uint8_t *	wbuf,
		uint32_t	start_block,
		uint32_t	num_blocks
	)

Write blocks to SD card from buffer.

Writes blocks from SD buffer to SD card. For best performance, this buffer should be aligned to CONFIG_SDHC_BUFFER_ALIGNMENT

Parameters

card	SD card to write from
wbuf	write buffer
start_block	first block to write to
num_blocks	number of blocks to write

Return values

0	write succeeded
-EBUSY	card is busy with another request
-ETIMEDOUT	card write timed out
-EIO	I/O error