mmc.h File Reference

Public API for MMC 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	mmc_write_blocks (struct sd_card *card, const uint8_t *wbuf, uint32_t start_block, uint32_t num_blocks)
	Write blocks to MMC card from buffer. More...
int	mmc_read_blocks (struct sd_card *card, uint8_t *rbuf, uint32_t start_block, uint32_t num_blocks)
	Read block from MMC card to buffer. More...
int	mmc_ioctl (struct sd_card *card, uint8_t cmd, void *buf)
	Get I/O control data from MMC card. More...

Detailed Description

Public API for MMC memory card subsystem.

Function Documentation

mmc_ioctl()

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

Get I/O control data from MMC card.

Sends I/O control commands to MMC card.

Parameters

card	MMC card
cmd	I/O control command Mirrors disk subsystem, see include/zephyr/drivers/disk.h for list of possible commands.
buf	I/O control buf

Return values

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

mmc_read_blocks()

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

Read block from MMC card to buffer.

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

Parameters

card	MMC 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

mmc_write_blocks()

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

Write blocks to MMC card from buffer.

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

Parameters

card	MMC 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