Detailed Description

Warning: This feature is experimental!
This API is experimental and in an early state - expect changes!

Overview

The SDIO/SD/MMC Device API (SDMMC) implements an SD host controller driver that provides a high-level API using a low-level SDIO/SD/MMC peripheral driver for accessing

MultiMediaCards (MMC) and Embedded MultiMediaCards (eMMC)
SD Memory Cards (SD Cards) with Standard Capacity (SDSC), High Capacity (SDHC) or Extended Capacity (SDXC).

In the context of this API, the term Card refers to either

a removable card such as SD Memory Card, SDIO Card, Combo Card or MMC Card or
an embedded device such as Embedded SD Memory Device, Embedded SDIO device, or eMMC device.

The term slot refers to the interface for a removable card.

The SDIO/SD/MMC device API (SDMMC) is divided into two parts:

The high-level API that implements the SD Host Controller driver and allows
- to initialize and identify different types of cards,
- to access them either blockwise or bytewise,
- to get information about the used card, and
- to send single commands or application specific commands to the card.
The low-level SDIO/SD/MMC peripheral driver of type sdmmc_driver_t implements the low-level functions required by the high-level device API. It has to be implemented for each MCU. The support of the low-level SDIO/SD/MMC peripheral driver is indicated by the MCU or board by the periph_sdmmc feature.

Currently the SDIO/SD/MMC Device API supports the following card types:

Card Type	Support	Remark
MMC/eMMC in MultiMediaCard mode	yes
MMC/eMMC in SPI mode	no
SD Memory Card in SD mode	yes	SDSC, SDHC and SDXC with Default or High Speed
SD Memory Card in SPI mode	no
SDIO in SD mode	no
SDIO in SPI mode	no

Limitations:

Only one card per SDIO/SD/MMC device is supported.
eMMCs specific features are not supported.
UHS-I, UHS-II and UHS-III are not supported.

Features and Modules

A board that uses an MCU with an SDIO/SD/MMC peripheral and has a card slot or device connected has to indicate this as feature periph_sdmmc in order to use the SDIO/SD/MMC API or drivers based on it. Furthermore, specific features of the SDIO/SD/MMC peripheral or configurations of the board have to be defined by corresponding features.

These are in detail:

periph_sdmmc (HAS_PERIPH_SDMMC in Kconfig) indicates that an SDIO/SD/MMC peripheral is present and used by the board. This feature shall be provided by the board configuration.
periph_sdmmc_8bit (HAS_PERIPH_SDMMC_8BIT in Kconfig) indicates that the SDIO/SD/MMC peripheral supports the 8-bit bus width and at least one component of the board is connected with 8 data lines. This feature shall be provided by the board configuration, if available.
periph_sdmmc_auto_clk (HAS_PERIPH_SDMMC_AUTO_CLK in Kconfig) indicates that the SDIO/SD/MMC peripheral supports the Auto-CLK feature, i.e. the automatic activation and deactivation of the SD CLK signal when required to save power. This function shall be provided by the MCU if supported.
periph_sdmmc_auto_cmd12 (HAS_PERIPH_SDMMC_AUTO_CMD12 in Kconfig) indicates that the SDIO/SD/MMC peripheral supports the Auto-CMD12 feature, i.e. CMD12 is sent automatically to stop the transmission in multiple block operations. This feature shall be provided by the MCU if supported.
periph_sdmmc_hs (HAS_PERIPH_SDMMC_HS in Kconfig) indicates that the SDIO/SD/MMC peripheral supports the high speed access, that is 50 MHz for SD and 52 MHz for MMC. This feature shall be provided by the MCU if supported.
periph_sdmmc_mmc (HAS_PERIPH_SDMMC_MMC in Kconfig) indicates that the SDIO/SD/MMC peripheral supports MMC/eMMCs. This feature shall be provided by the MCU if supported.

Some functionalities of the SDIO/SD/MMC Device API must be explicitly enabled via modules:

sdmmc_mmc (MODULE_SDMMC_MMC in Kconfig) enables the support for MMCs/eMMCs.
periph_sdmmc_8bit (MODULE_PERIPH_SDMMC_8BIT in Kconfig) enables the 8-bit bus width support. It requires the corresponding feature of the board.

Files
file	sdmmc.h
	SDIO/SD/MMC device API using a low-level peripheral driver.

Data Structures
union	sdmmc_card_status_t
	SD/MMC Card status as structure. More...

struct	sdmmc_sd_status_t
	SD Status (SD Memory Card only) More...

struct	sdmmc_cid_sd_t
	CID register structure (SD Memory Cards) More...

struct	sdmmc_cid_mmc_t
	CID register structure (MMC) More...

union	sdmmc_cid_t
	CID register structure (SD Memory and MMC Cards) More...

struct	sdmmc_csd_v1_t
	CSD register structure Version 1.0. More...

struct	sdmmc_csd_v2_t
	CSD register structure Version 2.0 and Version 3.0. More...

struct	sdmmc_csd_mmc_t
	CSD register structure for MMC. More...

union	sdmmc_csd_t
	CSD register (SD Memory Card and MMC) More...

struct	sdmmc_ext_csd_t
	Extended CSD (EXT_CSD) register structure (MMC only) More...

struct	sdmmc_scr_t
	SCR register structure (SD Memory Card only) More...

struct	sdmmc_xfer_desc_t
	Transfer descriptor. More...

struct	sdmmc_driver_t
	Low-level SDIO/SD/MMC peripheral driver. More...

struct	sdmmc_dev
	SDIO/SD/MMC device descriptor. More...

Macros
#define	SDMMC_CPU_DMA_REQUIREMENTS
	CPU-specific requirements for SDIO/SD/MMC buffers.

#define	sdmmc_buf_t SDMMC_CPU_DMA_REQUIREMENTS uint8_t
	Instantiation type for SDIO/SD/MMC buffers.

#define	SDMMC_SDHC_BLOCK_SIZE (512)
	Size of a single data block on SDHC/SDXC Cards in bytes.

#define	SDMMC_CARD_TYPE_SD
	Mask for any type of SD Memory card.

#define	SDMMC_NUMOF XFA_LEN(sdmmc_dev_t *, sdmmc_devs)
	Number of SDIO/SD/MMC devices defined.

Typedefs
typedef struct sdmmc_dev	sdmmc_dev_t
	sdmmc_dev_t forward declaration

typedef void(*	sdmmc_event_cb_t) (sdmmc_dev_t *dev, sdmmc_event_t event)
	Event callback function type.

Enumerations
enum	sdmmc_card_type_t { SDMMC_CARD_TYPE_UNKNOWN = 0x00 , SDMMC_CARD_TYPE_SDSC_V1 = 0x01 , SDMMC_CARD_TYPE_SDSC_V2_V3 = 0x02 , SDMMC_CARD_TYPE_SDHC_SDXC = 0x04 , SDMMC_CARD_TYPE_SDIO = 0x40 , SDMMC_CARD_TYPE_MMC = 0x80 }
	SDIO/SD/MMC Card types. More...

enum	sdmmc_bus_width_t { SDMMC_BUS_WIDTH_1BIT = 1 , SDMMC_BUS_WIDTH_4BIT = 4 , SDMMC_BUS_WIDTH_8BIT = 8 }
	SDIO/SD/MMC Card data bus widths. More...

enum	sdmmc_clock_rate_t { SDMMC_CLK_400K = KHZ(400) , SDMMC_CLK_20M = MHZ(20) , SDMMC_CLK_25M = MHZ(25) , SDMMC_CLK_26M = MHZ(26) , SDMMC_CLK_50M = MHZ(50) , SDMMC_CLK_52M = MHZ(52) }
	SDIO/SD/MMC Card clock rate types. More...

enum	sdmmc_xfer_type_t { SDMMC_MULTIBYTE , SDMMC_BLOCK , SDMMC_STREAM }
	Data transfer types. More...

enum	sdmmc_auto_cmd_t { SDMMC_AUTO_CMD_NONE = 0x00 , SDMMC_AUTO_CMD12 = 0x01 , SDMMC_AUTO_CMD23 = 0x02 , SDMMC_AUTO_CMD_BOTH = 0x03 }
	Auto Command features supported by the SDIO/SD/MMC peripheral. More...

enum	sdmmc_event_t { SDMMC_EVENT_CARD_INSERTED , SDMMC_EVENT_CARD_REMOVED }
	Events generated by SDIO/SD/MMC high level API. More...

Functions
static sdmmc_dev_t *	sdmmc_get_dev (unsigned num)
	Retrieve SDIO/SD/MMC device descriptor reference from device index.

static void	sdmmc_init (sdmmc_dev_t *dev)
	Basic initialization of the given SDIO/SD/MMC device.

int	sdmmc_send_cmd (sdmmc_dev_t dev, sdmmc_cmd_t cmd_idx, uint32_t arg, sdmmc_resp_t resp_type, uint32_t resp)
	Send command to SDIO/SD/MMC Card and optionally wait for response.

int	sdmmc_send_acmd (sdmmc_dev_t dev, sdmmc_cmd_t cmd_idx, uint32_t arg, sdmmc_resp_t resp_type, uint32_t resp)
	Send application specific command optionally wait for response.

int	sdmmc_card_init (sdmmc_dev_t *dev)
	Card Initialization and Identification.

int	sdmmc_xfer (sdmmc_dev_t dev, sdmmc_cmd_t cmd_idx, uint32_t arg, uint16_t block_size, uint16_t block_num, const void data_wr, void data_rd, uint16_t done)
	Perform a data transfer with the selected card or embedded device.

int	sdmmc_read_blocks (sdmmc_dev_t dev, uint32_t block_addr, uint16_t block_size, uint16_t block_num, void data, uint16_t *done)
	Read a number of blocks.

int	sdmmc_write_blocks (sdmmc_dev_t dev, uint32_t block_addr, uint16_t block_size, uint16_t block_num, const void data, uint16_t *done)
	Write a number of blocks.

int	sdmmc_erase_blocks (sdmmc_dev_t *dev, uint32_t block_addr, uint16_t block_num)
	Erase a number of blocks.

int	sdmmc_read_sds (sdmmc_dev_t dev, sdmmc_sd_status_t sds)
	Read SD Status Register.

uint64_t	sdmmc_get_capacity (sdmmc_dev_t *dev)
	Get Capacity of SD/MMC Card.

Variables
sdmmc_dev_t	sdmmc_devs []
	SDIO/SD/MMC device descriptor references as read-only XFA.

Command and Response related definitions
enum	sdmmc_cmd_t { SDMMC_CMD0 = SDMMC_CMD(0) , SDMMC_CMD1 = SDMMC_CMD(1) , SDMMC_CMD2 = SDMMC_CMD(2) , SDMMC_CMD3 = SDMMC_CMD(3) , SDMMC_CMD4 = SDMMC_CMD(4) , SDMMC_CMD5 = SDMMC_CMD(5) , SDMMC_CMD6 = SDMMC_CMD(6) , SDMMC_CMD7 = SDMMC_CMD(7) , SDMMC_CMD8 = SDMMC_CMD(8) , SDMMC_CMD9 = SDMMC_CMD(9) , SDMMC_CMD10 = SDMMC_CMD(10) , SDMMC_CMD12 = SDMMC_CMD(12) , SDMMC_CMD13 = SDMMC_CMD(13) , SDMMC_CMD16 = SDMMC_CMD(16) , SDMMC_CMD17 = SDMMC_CMD(17) , SDMMC_CMD18 = SDMMC_CMD(18) , SDMMC_CMD23 = SDMMC_CMD(23) , SDMMC_CMD24 = SDMMC_CMD(24) , SDMMC_CMD25 = SDMMC_CMD(25) , SDMMC_CMD32 = SDMMC_CMD(32) , SDMMC_CMD33 = SDMMC_CMD(33) , SDMMC_CMD38 = SDMMC_CMD(38) , SDMMC_CMD52 = SDMMC_CMD(52) , SDMMC_CMD53 = SDMMC_CMD(53) , SDMMC_CMD55 = SDMMC_CMD(55) , SDMMC_CMD58 = SDMMC_CMD(58) , SDMMC_CMD59 = SDMMC_CMD(59) , SDMMC_ACMD6 = SDMMC_ACMD(6) , SDMMC_ACMD13 = SDMMC_ACMD(13) , SDMMC_ACMD23 = SDMMC_ACMD(23) , SDMMC_ACMD41 = SDMMC_ACMD(41) , SDMMC_ACMD51 = SDMMC_ACMD(51) }
	SDIO/SD/MMC Commands. More...

enum	sdmmc_resp_t { SDMMC_NO_R = 0 , SDMMC_R1 = 1 \| SDMMC_RESP_CRC , SDMMC_R1B , SDMMC_R2 = 2 \| SDMMC_RESP_CRC , SDMMC_R3 = 3 , SDMMC_R4 = 4 , SDMMC_R5 = 5 \| SDMMC_RESP_CRC , SDMMC_R6 = 6 \| SDMMC_RESP_CRC , SDMMC_R7 = 7 \| SDMMC_RESP_CRC }
	SDIO/SD/MMC Response types. More...

#define	SDMMC_CMD(n) (n)
	Command index.

#define	SDMMC_ACMD_PREFIX (1 << 7)
	Application specific command index prefix (Bit is 7 used)

#define	SDMMC_ACMD(n) (SDMMC_ACMD_PREFIX \| SDMMC_CMD(n))
	Application specific command index.

#define	SDMMC_CMD_NO_ARG (0x00000000UL)
	Command argument if no argument is required.

#define	SDMMC_CMD_ARG_RCA(n) ((uint32_t)n << 16)
	Command argument if RCA is used in addressed commands.

#define	SDMMC_RESP_CRC (1UL << 4)
	Mask to check whether the response type uses CRC7.

#define	SDMMC_RESP_BUSY (1UL << 5)
	Mask to check whether the response includes busy status from card.

#define	SDMMC_RESP_IDX (0xf)
	Mask of response index.

SDIO/SD/MMC Card status as returned in responses R1 to CMD13 with b[15]=0
See also Physical Layer Simplified Specification Version 9.00, Section 4.10.1, Table 4-42 [sdcard.org] SDIO Simplified Specification Version 3.00, 4.10.8, Table 4-7, [sdcard.org] JEDEC Standard No. JESD84-B42, MultiMediaCard (MMC) Electrical Standard, High Capacity (MMCA, 4.2), Section 7.11, Table 25 [jedec.org]
enum	{ SDMMC_CARD_STATE_IDLE = 0 , SDMMC_CARD_STATE_READY = 1 , SDMMC_CARD_STATE_IDENT = 2 , SDMMC_CARD_STATE_STBY = 3 , SDMMC_CARD_STATE_TRAN = 4 , SDMMC_CARD_STATE_DATA = 5 , SDMMC_CARD_STATE_RCV = 6 , SDMMC_CARD_STATE_PRG = 7 , SDMMC_CARD_STATE_DIS = 8 , SDMMC_CARD_STATE_BTST = 9 }
	SD/MMC Card states. More...

#define	SDMMC_CARD_STATUS_OUT_OF_RANGE (1UL << 31)
	SD/SDIO and MMC.

#define	SDMMC_CARD_STATUS_ADDRESS_ERROR (1UL << 30)
	SD and MMC.

#define	SDMMC_CARD_STATUS_BLOCK_LEN_ERROR (1UL << 29)
	SD and MMC.

#define	SDMMC_CARD_STATUS_ERASE_SEQ_ERROR (1UL << 28)
	SD and MMC.

#define	SDMMC_CARD_STATUS_ERASE_PARAM (1UL << 27)
	SD and MMC.

#define	SDMMC_CARD_STATUS_WP_VIOLATION (1UL << 26)
	SD and MMC.

#define	SDMMC_CARD_STATUS_CARD_IS_LOCKED (1UL << 25)
	SD and MMC.

#define	SDMMC_CARD_STATUS_LOCK_UNLOCK_FAILED (1UL << 24)
	SD/SDIO and MMC.

#define	SDMMC_CARD_STATUS_COM_CRC_ERROR (1UL << 23)
	SD/SDIO and MMC.

#define	SDMMC_CARD_STATUS_ILLEGAL_COMMAND (1UL << 22)
	SD and MMC.

#define	SDMMC_CARD_STATUS_CARD_ECC_FAILED (1UL << 21)
	SD and MMC.

#define	SDMMC_CARD_STATUS_CC_ERROR (1UL << 20)
	SD and MMC.

#define	SDMMC_CARD_STATUS_ERROR (1UL << 19)
	SD/SDIO and MMC.

#define	SDMMC_CARD_STATUS_UNDERRUN (1UL << 18)
	MMC only.

#define	SDMMC_CARD_STATUS_OVERRUN (1UL << 17)
	MMC only.

#define	SDMMC_CARD_STATUS_CSD_OVERWRITE (1UL << 16)
	SD (CSD), MMC (CSD and CID)

#define	SDMMC_CARD_STATUS_WP_ERASE_SKIP (1UL << 15)
	SD and MMC.

#define	SDMMC_CARD_STATUS_CARD_ECC_DISABLED (1UL << 14)
	SD only.

#define	SDMMC_CARD_STATUS_ERASE_RESET (1UL << 13)
	SD and MMC.

#define	SDMMC_CARD_STATUS_READY_FOR_DATA (1UL << 8)
	SD and MMC.

#define	SDMMC_CARD_STATUS_SWITCH_ERROR (1UL << 7)
	MMC only.

#define	SDMMC_CARD_STATUS_FX_EVENT (1UL << 6)
	SD only.

#define	SDMMC_CARD_STATUS_APP_CMD (1UL << 5)
	SD and MMC.

#define	SDMMC_CARD_STATUS_AKE_SEQ_ERROR (1UL << 3)
	SD only.

#define	SDMMC_CARD_STATUS_ERRORS
	SD/MMC Card status mask for error flags.

#define	SDMMC_CARD_STATUS_CURRENT_STATE(n) (((n) >> SDMMC_CARD_STATUS_CURRENT_STATE_Pos) & 0x0f)
	SD/MMC Card status mask for current state.

#define	SDMMC_CARD_STATUS_CURRENT_STATE_Pos (9)
	CURRENT_STATE position.

CSD Register Definitions
See also Physical Layer Simplified Specification Version 9.00, Section 5.3, [sdcard.org] JEDEC Standard No. JESD84-B42, MultiMediaCard (MMC) Electrical Standard, High Capacity (MMCA, 4.2), Section 8.3, Table 35 [jedec.org]
enum	sdmmc_csd_version_t { SDMMC_CSD_V1 = 0 , SDMMC_CSD_V2 = 1 , SDMMC_CSD_V3 = 2 , SDMMC_CSD_Vx = 3 }
	CSD Register Versions (SD Memory Card and MMC) More...

#define	SDMMC_CSD_REG_SIZE (16)
	CSD register size in byte (CSD is 128 bit)

#define	SDMMC_EXT_CSD_REG_SIZE (512)
	Extended CSD (EXT_CSD) register size in byte (EXT_CSD is 512 byte)

Definitions used for CMD8 - SEND_IF_COND (SD only)
See also Physical Layer Simplified Specification Version 9.00, Section 4.3.13 [sdcard.org]
#define	SDMMC_CMD8_CHECK_PATTERN (0xaa)
	Check pattern, 0xAA recommended.

#define	SDMMC_CMD8_VHS_27_36V (0b0001 << 8)
	Voltage Supplied by host 2.7-3.6V.

#define	SDMMC_CMD8_PCIE_AVAIL (1 << 12)
	PCIe Availability (not yet used)

#define	SDMMC_CMD8_PCIE_12V (1 << 13)
	PCIe 1.2V Support (not yet used)

#define	SDMMC_CMD8_CHECK (SDMMC_CMD8_VHS_27_36V \| SDMMC_CMD8_CHECK_PATTERN)
	Command argument used in CMD8.

OCR Register Definition
See also Physical Layer Simplified Specification Version 9.00, Section 5.1, Table 5-1 [sdcard.org]
#define	SDMMC_OCR_18V (1UL << 7)
	Low Voltage Range.

#define	SDMMC_OCR_27_28V (1UL << 15)
	2.7V to 2.8V Range

#define	SDMMC_OCR_28_29V (1UL << 16)
	2.8V to 2.9V Range

#define	SDMMC_OCR_29_30V (1UL << 17)
	2.9V to 3.0V Range

#define	SDMMC_OCR_30_31V (1UL << 18)
	3.0V to 3.1V Range

#define	SDMMC_OCR_31_32V (1UL << 19)
	3.1V to 3.2V Range

#define	SDMMC_OCR_32_33V (1UL << 20)
	3.2V to 3.3V Range

#define	SDMMC_OCR_33_34V (1UL << 21)
	3.3V to 3.4V Range

#define	SDMMC_OCR_34_35V (1UL << 22)
	3.4V to 3.5V Range

#define	SDMMC_OCR_35_36V (1UL << 23)
	3.5V to 3.6V Range

#define	SDMMC_OCR_S18A (1UL << 24)
	Switching to 1.8V Accepted.

#define	SDMMC_OCR_OVER_2TB (1UL << 27)
	Over 2TB support status (CO2T)

#define	SDMMC_OCR_UHS_II (1UL << 29)
	UHS-II Card Status.

#define	SDMMC_OCR_CCS (1UL << 30)
	Card Capacity Status (CCS)

#define	SDMMC_OCR_POWER_UP (1UL << 31)
	Card power up status bit (busy)

#define	SDMMC_OCR_ALL_VOLTAGES
	Voltage profile for the range 2.7-3.6V as defined for MMC.

SD Status register (SD Memory Cards)
#define	SDMMC_SD_STATUS_SIZE (64)
	SD status register size.

CID register (SD Memory and MMC Cards)
#define	SDMMC_CID_REG_SIZE (16)
	CID register size in bytes (CID is 128 bit)

#define	SDMMC_CID_OID_SIZE_SD (2)
	OID (OEM/Application ID) size in byte (SD)

#define	SDMMC_CID_PNM_SIZE_SD (5)
	PNM (Product name) size in byte (SD)

#define	SDMMC_CID_PNM_SIZE_MMC (6)
	PNM (Product name) size in byte (MMC)

SCR Register Definitions (SD Memory Card only)
See also Physical Layer Simplified Specification Version 9.00, Section 5.6, Table 5-17 [sdcard.org]
#define	SDMMC_SCR_REG_SIZE (8)
	SCR register size in byte (SCR is 64 bit)

#define	SDMMC_SCR_ACMD_53_54_SUPPORT (0b10000)
	sdmmc_scr_t::CMD_SUPPORT Secure Receive/Send supported

#define	SDMMC_SCR_ACMD_58_59_SUPPORT (0b01000)
	sdmmc_scr_t::CMD_SUPPORT Extension Register Multi-Block

#define	SDMMC_SCR_ACMD_48_49_SUPPORT (0b00100)
	sdmmc_scr_t::CMD_SUPPORT Extension Register Single-Block

#define	SDMMC_SCR_ACMD_23_SUPPORT (0b00010)
	sdmmc_scr_t::CMD_SUPPORT Set Block Count

#define	SDMMC_SCR_ACMD_20_SUPPORT (0b00001)
	sdmmc_scr_t::CMD_SUPPORT Speed Class Control

#define	SDMMC_SCR_SD_SPEC(scr) (scr.SD_SPEC + scr.SD_SPEC3 + (scr.SD_SPECX ? scr.SD_SPECX + 1 : scr.SD_SPEC4))
	Get Physical Layer Specification Version value from SCR value.

#define	SDMMC_DEV(x) (sdmmc_get_dev(x))
	SD/MMC device access macro.

Macro Definition Documentation

◆ SDMMC_ACMD

#define SDMMC_ACMD ( n ) (SDMMC_ACMD_PREFIX | SDMMC_CMD(n))

Application specific command index.

Definition at line 191 of file sdmmc.h.

◆ SDMMC_ACMD_PREFIX

#define SDMMC_ACMD_PREFIX (1 << 7)

Application specific command index prefix (Bit is 7 used)

Definition at line 186 of file sdmmc.h.

◆ sdmmc_buf_t

#define sdmmc_buf_t SDMMC_CPU_DMA_REQUIREMENTS uint8_t

Instantiation type for SDIO/SD/MMC buffers.

Example usage:

sdmmc_buf_t buffer[SDMMC_SDHC_BLOCK_SIZE];

sdmmc_buf_t

#define sdmmc_buf_t

Instantiation type for SDIO/SD/MMC buffers.

Definition sdmmc.h:163

SDMMC_SDHC_BLOCK_SIZE

#define SDMMC_SDHC_BLOCK_SIZE

Size of a single data block on SDHC/SDXC Cards in bytes.

Definition sdmmc.h:171

Definition at line 163 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ADDRESS_ERROR

#define SDMMC_CARD_STATUS_ADDRESS_ERROR (1UL << 30)

SD and MMC.

Definition at line 410 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_AKE_SEQ_ERROR

#define SDMMC_CARD_STATUS_AKE_SEQ_ERROR (1UL << 3)

SD only.

Definition at line 432 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_APP_CMD

#define SDMMC_CARD_STATUS_APP_CMD (1UL << 5)

SD and MMC.

Definition at line 431 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_BLOCK_LEN_ERROR

#define SDMMC_CARD_STATUS_BLOCK_LEN_ERROR (1UL << 29)

SD and MMC.

Definition at line 411 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CARD_ECC_DISABLED

#define SDMMC_CARD_STATUS_CARD_ECC_DISABLED (1UL << 14)

SD only.

Definition at line 426 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CARD_ECC_FAILED

#define SDMMC_CARD_STATUS_CARD_ECC_FAILED (1UL << 21)

SD and MMC.

Definition at line 419 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CARD_IS_LOCKED

#define SDMMC_CARD_STATUS_CARD_IS_LOCKED (1UL << 25)

SD and MMC.

Definition at line 415 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CC_ERROR

#define SDMMC_CARD_STATUS_CC_ERROR (1UL << 20)

SD and MMC.

Definition at line 420 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_COM_CRC_ERROR

#define SDMMC_CARD_STATUS_COM_CRC_ERROR (1UL << 23)

SD/SDIO and MMC.

Definition at line 417 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CSD_OVERWRITE

#define SDMMC_CARD_STATUS_CSD_OVERWRITE (1UL << 16)

SD (CSD), MMC (CSD and CID)

Definition at line 424 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CURRENT_STATE

#define SDMMC_CARD_STATUS_CURRENT_STATE ( n ) (((n) >> SDMMC_CARD_STATUS_CURRENT_STATE_Pos) & 0x0f)

SD/MMC Card status mask for current state.

Definition at line 455 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_CURRENT_STATE_Pos

#define SDMMC_CARD_STATUS_CURRENT_STATE_Pos (9)

CURRENT_STATE position.

Definition at line 456 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ERASE_PARAM

#define SDMMC_CARD_STATUS_ERASE_PARAM (1UL << 27)

SD and MMC.

Definition at line 413 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ERASE_RESET

#define SDMMC_CARD_STATUS_ERASE_RESET (1UL << 13)

SD and MMC.

Definition at line 427 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ERASE_SEQ_ERROR

#define SDMMC_CARD_STATUS_ERASE_SEQ_ERROR (1UL << 28)

SD and MMC.

Definition at line 412 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ERROR

#define SDMMC_CARD_STATUS_ERROR (1UL << 19)

SD/SDIO and MMC.

Definition at line 421 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ERRORS

#define SDMMC_CARD_STATUS_ERRORS

Value:

                                    (SDMMC_CARD_STATUS_OUT_OF_RANGE | \
                                    SDMMC_CARD_STATUS_ADDRESS_ERROR | \
                                    SDMMC_CARD_STATUS_BLOCK_LEN_ERROR | \
                                    SDMMC_CARD_STATUS_ERASE_SEQ_ERROR | \
                                    SDMMC_CARD_STATUS_ERASE_PARAM | \
                                    SDMMC_CARD_STATUS_WP_VIOLATION | \
                                    SDMMC_CARD_STATUS_LOCK_UNLOCK_FAILED | \
                                    SDMMC_CARD_STATUS_COM_CRC_ERROR | \
                                    SDMMC_CARD_STATUS_ILLEGAL_COMMAND | \
                                    SDMMC_CARD_STATUS_CARD_ECC_FAILED | \
                                    SDMMC_CARD_STATUS_CC_ERROR | \
                                    SDMMC_CARD_STATUS_ERROR | \
                                    SDMMC_CARD_STATUS_UNDERRUN | \
                                    SDMMC_CARD_STATUS_OVERRUN | \
                                    SDMMC_CARD_STATUS_CSD_OVERWRITE | \
                                    SDMMC_CARD_STATUS_WP_ERASE_SKIP | \
                                    SDMMC_CARD_STATUS_SWITCH_ERROR | \
                                    SDMMC_CARD_STATUS_AKE_SEQ_ERROR)

SD/MMC Card status mask for error flags.

Definition at line 435 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_FX_EVENT

#define SDMMC_CARD_STATUS_FX_EVENT (1UL << 6)

SD only.

Definition at line 430 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_ILLEGAL_COMMAND

#define SDMMC_CARD_STATUS_ILLEGAL_COMMAND (1UL << 22)

SD and MMC.

Definition at line 418 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_LOCK_UNLOCK_FAILED

#define SDMMC_CARD_STATUS_LOCK_UNLOCK_FAILED (1UL << 24)

SD/SDIO and MMC.

Definition at line 416 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_OUT_OF_RANGE

#define SDMMC_CARD_STATUS_OUT_OF_RANGE (1UL << 31)

SD/SDIO and MMC.

Definition at line 409 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_OVERRUN

#define SDMMC_CARD_STATUS_OVERRUN (1UL << 17)

MMC only.

Definition at line 423 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_READY_FOR_DATA

#define SDMMC_CARD_STATUS_READY_FOR_DATA (1UL << 8)

SD and MMC.

Definition at line 428 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_SWITCH_ERROR

#define SDMMC_CARD_STATUS_SWITCH_ERROR (1UL << 7)

MMC only.

Definition at line 429 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_UNDERRUN

#define SDMMC_CARD_STATUS_UNDERRUN (1UL << 18)

MMC only.

Definition at line 422 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_WP_ERASE_SKIP

#define SDMMC_CARD_STATUS_WP_ERASE_SKIP (1UL << 15)

SD and MMC.

Definition at line 425 of file sdmmc.h.

◆ SDMMC_CARD_STATUS_WP_VIOLATION

#define SDMMC_CARD_STATUS_WP_VIOLATION (1UL << 26)

SD and MMC.

Definition at line 414 of file sdmmc.h.

◆ SDMMC_CARD_TYPE_SD

#define SDMMC_CARD_TYPE_SD

Value:

                             (SDMMC_CARD_TYPE_SDSC_V1 | \
                             SDMMC_CARD_TYPE_SDSC_V2_V3 | \
                             SDMMC_CARD_TYPE_SDHC_SDXC)

Mask for any type of SD Memory card.

Definition at line 356 of file sdmmc.h.

◆ SDMMC_CID_OID_SIZE_SD

#define SDMMC_CID_OID_SIZE_SD (2)

OID (OEM/Application ID) size in byte (SD)

Definition at line 561 of file sdmmc.h.

◆ SDMMC_CID_PNM_SIZE_MMC

#define SDMMC_CID_PNM_SIZE_MMC (6)

PNM (Product name) size in byte (MMC)

Definition at line 563 of file sdmmc.h.

◆ SDMMC_CID_PNM_SIZE_SD

#define SDMMC_CID_PNM_SIZE_SD (5)

PNM (Product name) size in byte (SD)

Definition at line 562 of file sdmmc.h.

◆ SDMMC_CID_REG_SIZE

#define SDMMC_CID_REG_SIZE (16)

CID register size in bytes (CID is 128 bit)

Definition at line 559 of file sdmmc.h.

◆ SDMMC_CMD

#define SDMMC_CMD ( n ) (n)

Command index.

Definition at line 181 of file sdmmc.h.

◆ SDMMC_CMD8_CHECK

#define SDMMC_CMD8_CHECK (SDMMC_CMD8_VHS_27_36V | SDMMC_CMD8_CHECK_PATTERN)

Command argument used in CMD8.

Definition at line 292 of file sdmmc.h.

◆ SDMMC_CMD8_CHECK_PATTERN

#define SDMMC_CMD8_CHECK_PATTERN (0xaa)

Check pattern, 0xAA recommended.

Definition at line 286 of file sdmmc.h.

◆ SDMMC_CMD8_PCIE_12V

#define SDMMC_CMD8_PCIE_12V (1 << 13)

PCIe 1.2V Support (not yet used)

Definition at line 289 of file sdmmc.h.

◆ SDMMC_CMD8_PCIE_AVAIL

#define SDMMC_CMD8_PCIE_AVAIL (1 << 12)

PCIe Availability (not yet used)

Definition at line 288 of file sdmmc.h.

◆ SDMMC_CMD8_VHS_27_36V

#define SDMMC_CMD8_VHS_27_36V (0b0001 << 8)

Voltage Supplied by host 2.7-3.6V.

Definition at line 287 of file sdmmc.h.

◆ SDMMC_CMD_ARG_RCA

#define SDMMC_CMD_ARG_RCA ( n ) ((uint32_t)n << 16)

Command argument if RCA is used in addressed commands.

Definition at line 241 of file sdmmc.h.

◆ SDMMC_CMD_NO_ARG

#define SDMMC_CMD_NO_ARG (0x00000000UL)

Command argument if no argument is required.

Definition at line 238 of file sdmmc.h.

◆ SDMMC_CPU_DMA_REQUIREMENTS

#define SDMMC_CPU_DMA_REQUIREMENTS

CPU-specific requirements for SDIO/SD/MMC buffers.

Can be overridden by periph_cpu if needed by the SDMMC/SDIO peripheral. Example usage:

SDMMC_CPU_DMA_REQUIREMENTS uint8_t buffer[64];

SDMMC_CPU_DMA_REQUIREMENTS

#define SDMMC_CPU_DMA_REQUIREMENTS

SDIO/SDMMC buffer instantiation requirement for SDHC.

Definition periph_cpu.h:729

Definition at line 152 of file sdmmc.h.

◆ SDMMC_CSD_REG_SIZE

#define SDMMC_CSD_REG_SIZE (16)

CSD register size in byte (CSD is 128 bit)

Definition at line 630 of file sdmmc.h.

◆ SDMMC_DEV

#define SDMMC_DEV ( x ) (sdmmc_get_dev(x))

SD/MMC device access macro.

Definition at line 875 of file sdmmc.h.

◆ SDMMC_EXT_CSD_REG_SIZE

#define SDMMC_EXT_CSD_REG_SIZE (512)

Extended CSD (EXT_CSD) register size in byte (EXT_CSD is 512 byte)

Definition at line 776 of file sdmmc.h.

◆ SDMMC_NUMOF

#define SDMMC_NUMOF XFA_LEN(sdmmc_dev_t *, sdmmc_devs)

Number of SDIO/SD/MMC devices defined.

Definition at line 1440 of file sdmmc.h.

◆ SDMMC_OCR_18V

#define SDMMC_OCR_18V (1UL << 7)

Low Voltage Range.

Definition at line 302 of file sdmmc.h.

◆ SDMMC_OCR_27_28V

#define SDMMC_OCR_27_28V (1UL << 15)

2.7V to 2.8V Range

Definition at line 303 of file sdmmc.h.

◆ SDMMC_OCR_28_29V

#define SDMMC_OCR_28_29V (1UL << 16)

2.8V to 2.9V Range

Definition at line 304 of file sdmmc.h.

◆ SDMMC_OCR_29_30V

#define SDMMC_OCR_29_30V (1UL << 17)

2.9V to 3.0V Range

Definition at line 305 of file sdmmc.h.

◆ SDMMC_OCR_30_31V

#define SDMMC_OCR_30_31V (1UL << 18)

3.0V to 3.1V Range

Definition at line 306 of file sdmmc.h.

◆ SDMMC_OCR_31_32V

#define SDMMC_OCR_31_32V (1UL << 19)

3.1V to 3.2V Range

Definition at line 307 of file sdmmc.h.

◆ SDMMC_OCR_32_33V

#define SDMMC_OCR_32_33V (1UL << 20)

3.2V to 3.3V Range

Definition at line 308 of file sdmmc.h.

◆ SDMMC_OCR_33_34V

#define SDMMC_OCR_33_34V (1UL << 21)

3.3V to 3.4V Range

Definition at line 309 of file sdmmc.h.

◆ SDMMC_OCR_34_35V

#define SDMMC_OCR_34_35V (1UL << 22)

3.4V to 3.5V Range

Definition at line 310 of file sdmmc.h.

◆ SDMMC_OCR_35_36V

#define SDMMC_OCR_35_36V (1UL << 23)

3.5V to 3.6V Range

Definition at line 311 of file sdmmc.h.

◆ SDMMC_OCR_ALL_VOLTAGES

#define SDMMC_OCR_ALL_VOLTAGES

Value:

                                 (SDMMC_OCR_27_28V | SDMMC_OCR_28_29V | \
                                 SDMMC_OCR_29_30V | SDMMC_OCR_30_31V | \
                                 SDMMC_OCR_31_32V | SDMMC_OCR_32_33V | \
                                 SDMMC_OCR_33_34V | SDMMC_OCR_34_35V | \
                                 SDMMC_OCR_35_36V)

Voltage profile for the range 2.7-3.6V as defined for MMC.

See also: JEDEC Standard No. JESD84-B42, MultiMediaCard (MMC) Electrical Standard, High Capacity (MMCA, 4.2), Section 8, Table 29 [jedec.org]

Definition at line 326 of file sdmmc.h.

◆ SDMMC_OCR_CCS

#define SDMMC_OCR_CCS (1UL << 30)

Card Capacity Status (CCS)

Definition at line 316 of file sdmmc.h.

◆ SDMMC_OCR_OVER_2TB

#define SDMMC_OCR_OVER_2TB (1UL << 27)

Over 2TB support status (CO2T)

Definition at line 314 of file sdmmc.h.

◆ SDMMC_OCR_POWER_UP

#define SDMMC_OCR_POWER_UP (1UL << 31)

Card power up status bit (busy)

Definition at line 317 of file sdmmc.h.

◆ SDMMC_OCR_S18A

#define SDMMC_OCR_S18A (1UL << 24)

Switching to 1.8V Accepted.

Definition at line 313 of file sdmmc.h.

◆ SDMMC_OCR_UHS_II

#define SDMMC_OCR_UHS_II (1UL << 29)

UHS-II Card Status.

Definition at line 315 of file sdmmc.h.

◆ SDMMC_RESP_BUSY

#define SDMMC_RESP_BUSY (1UL << 5)

Mask to check whether the response includes busy status from card.

Definition at line 246 of file sdmmc.h.

◆ SDMMC_RESP_CRC

#define SDMMC_RESP_CRC (1UL << 4)

Mask to check whether the response type uses CRC7.

Definition at line 244 of file sdmmc.h.

◆ SDMMC_RESP_IDX

#define SDMMC_RESP_IDX (0xf)

Mask of response index.

Definition at line 248 of file sdmmc.h.

◆ SDMMC_SCR_ACMD_20_SUPPORT

#define SDMMC_SCR_ACMD_20_SUPPORT (0b00001)

sdmmc_scr_t::CMD_SUPPORT Speed Class Control

Definition at line 846 of file sdmmc.h.

◆ SDMMC_SCR_ACMD_23_SUPPORT

#define SDMMC_SCR_ACMD_23_SUPPORT (0b00010)

sdmmc_scr_t::CMD_SUPPORT Set Block Count

Definition at line 844 of file sdmmc.h.

◆ SDMMC_SCR_ACMD_48_49_SUPPORT

#define SDMMC_SCR_ACMD_48_49_SUPPORT (0b00100)

sdmmc_scr_t::CMD_SUPPORT Extension Register Single-Block

Definition at line 842 of file sdmmc.h.

◆ SDMMC_SCR_ACMD_53_54_SUPPORT

#define SDMMC_SCR_ACMD_53_54_SUPPORT (0b10000)

sdmmc_scr_t::CMD_SUPPORT Secure Receive/Send supported

Definition at line 838 of file sdmmc.h.

◆ SDMMC_SCR_ACMD_58_59_SUPPORT

#define SDMMC_SCR_ACMD_58_59_SUPPORT (0b01000)

sdmmc_scr_t::CMD_SUPPORT Extension Register Multi-Block

Definition at line 840 of file sdmmc.h.

◆ SDMMC_SCR_REG_SIZE

#define SDMMC_SCR_REG_SIZE (8)

SCR register size in byte (SCR is 64 bit)

Definition at line 807 of file sdmmc.h.

◆ SDMMC_SCR_SD_SPEC

#define SDMMC_SCR_SD_SPEC ( scr ) (scr.SD_SPEC + scr.SD_SPEC3 + (scr.SD_SPECX ? scr.SD_SPECX + 1 : scr.SD_SPEC4))

Get Physical Layer Specification Version value from SCR value.

Parameters

scr	SCR register value of type sdmmc_scr_t

Value	Physical Layer Specification Version Number
0	Version 1.0 and 1.01
1	Version 1.10
2	Version 2.00
3	Version 3.0X
4	Version 4.XX
5	Version 5.XX
6	Version 6.XX
7	Version 7.XX
8	Version 8.XX
9	Version 9.XX

Definition at line 866 of file sdmmc.h.

◆ SDMMC_SD_STATUS_SIZE

#define SDMMC_SD_STATUS_SIZE (64)

SD status register size.

Definition at line 519 of file sdmmc.h.

◆ SDMMC_SDHC_BLOCK_SIZE

#define SDMMC_SDHC_BLOCK_SIZE (512)

Size of a single data block on SDHC/SDXC Cards in bytes.

The size of a data block depend on type and mode of the card. SDSC/SDXC use a fix size of 512 bytes.

Definition at line 171 of file sdmmc.h.

Typedef Documentation

◆ sdmmc_dev_t

typedef struct sdmmc_dev sdmmc_dev_t

sdmmc_dev_t forward declaration

SDIO/SD/MMC device descriptor.

The device descriptor holds all required information about the SDIO/SD/MMC device and the card that is used by this decive.

Note

Most of the information is determined or collected during the card initialization and identification procedure by the sdmmc_card_init function. However, some information must be determined and collected by the low-level SDIO/SD/MMC peripheral driver. These are

Definition at line 881 of file sdmmc.h.

◆ sdmmc_event_cb_t

typedef void(* sdmmc_event_cb_t) (sdmmc_dev_t *dev, sdmmc_event_t event)

Event callback function type.

Parameters

[in]	dev	SDIO/SD/MMC device to be used
[in]	event	Event

Warning: The function is called in the ISR context. Do not do anything comprehensive or time-consuming. Instead, use thread_flags, event_queue or msg mechanism to inform a thread about the event, which then handles the event asynchronously in thread context.

Definition at line 943 of file sdmmc.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

SD/MMC Card states.

Enumerator
SDMMC_CARD_STATE_IDLE	Idle.
SDMMC_CARD_STATE_READY	Ready.
SDMMC_CARD_STATE_IDENT	Identification.
SDMMC_CARD_STATE_STBY	Stand-by.
SDMMC_CARD_STATE_TRAN	Transfer.
SDMMC_CARD_STATE_DATA	Data.
SDMMC_CARD_STATE_RCV	Receive.
SDMMC_CARD_STATE_PRG	Programming.
SDMMC_CARD_STATE_DIS	Disconnect.
SDMMC_CARD_STATE_BTST	Bus Test.

Definition at line 461 of file sdmmc.h.

◆ sdmmc_auto_cmd_t

enum sdmmc_auto_cmd_t

Auto Command features supported by the SDIO/SD/MMC peripheral.

Most SDIO/SD/MMC peripherals support the Auto-Command feature for CMD12 and CMD23. The low-level SDIO/SD/MMC peripheral driver defines in sdmmc_driver_t::init which Auto-Command features are supported by the peripheral. To be able to specify a combination of these features, the enumeration values are defined bitwise.

Definition at line 917 of file sdmmc.h.

◆ sdmmc_bus_width_t

enum sdmmc_bus_width_t

SDIO/SD/MMC Card data bus widths.

Possible bus widths are given as integer values as defined in SD Status register and the SCR register for SD Cards.

Warning: The values differ from the bus widths used in ACMD6 for SD Cards and the CCC register in SDIO Cards.

See also: Physical Layer Simplified Specification Version 9.00, 4.10.2, Table 4-44, SD Status [sdcard.org]

Enumerator
SDMMC_BUS_WIDTH_1BIT	Data bus width is 1 bit (default)
SDMMC_BUS_WIDTH_4BIT	Data bus width is 4 bit.
SDMMC_BUS_WIDTH_8BIT	Data bus width is 8 bit.

Definition at line 372 of file sdmmc.h.

◆ sdmmc_card_type_t

enum sdmmc_card_type_t

SDIO/SD/MMC Card types.

To be able to specify a Combo card (combined SD Memory and SDIO card), the enumeration values are defined bitwise so that they can be ORed to represent a Combo card with different versions of the SD Memory part. For example, SDMMC_CARD_TYPE_SDIO | SDMMC_CARD_TYPE_SDSC_V2_V3 represents a Combo card with SDIO function and SD Memory Card Standard Capacity (SDSC) Version 2.x+.

Enumerator
SDMMC_CARD_TYPE_UNKNOWN	Card type unknown.
SDMMC_CARD_TYPE_SDSC_V1	SD Memory Card Standard Capacity (SDSC) Version 1.x.
SDMMC_CARD_TYPE_SDSC_V2_V3	SD Memory Card Standard Capacity (SDSC) Version 2.x+.
SDMMC_CARD_TYPE_SDHC_SDXC	SD Memory Card High or Extended Capacity (SDHC/SDXC)
SDMMC_CARD_TYPE_SDIO	SDIO Card.
SDMMC_CARD_TYPE_MMC	MultiMedia Card.

Definition at line 343 of file sdmmc.h.

◆ sdmmc_clock_rate_t

enum sdmmc_clock_rate_t

SDIO/SD/MMC Card clock rate types.

Identifies the clock frequency to be used. The clock frequency in identification mode f_OD (Open Drain mode) is fixed and is f_OD = 400 kHz. The actual clock frequency in data transfer mode f_PP (Push-Pull mode) depends on the SDIO/SD/MMC device and the card used. The low-level SDIO/SD/MMC peripheral driver sets the actual clock rate in function sdmmc_driver_t::set_clock_rate.

Enumerator
SDMMC_CLK_400K	Identification Mode f_OD (400 kHz)
SDMMC_CLK_20M	MMC Card in Data Transfer Mode (Backward Compatibility)
SDMMC_CLK_25M	SD/SDIO Card in Data Transfer Mode (Default Speed)
SDMMC_CLK_26M	MMC/eMMC Card in Data Transfer Mode (Default Speed)
SDMMC_CLK_50M	SD/SDIO Card in Data Transfer Mode (High Speed)
SDMMC_CLK_52M	MMC/eMMC in Data Transfer Mode (High Speed)

Definition at line 388 of file sdmmc.h.

◆ sdmmc_cmd_t

enum sdmmc_cmd_t

SDIO/SD/MMC Commands.

Commands used by the driver. Command indices are in range [0..63]. Application specific command indices are ORed with SDMMC_ACMD_PREFIX (0x80) and thus marked as application specific. SDMMC_ACMD_PREFIX can be used to check whether a given command index specifies an application specific command.

Enumerator
SDMMC_CMD0	GO_IDLE_STATE.
SDMMC_CMD1	SEND_OP_COND.
SDMMC_CMD2	ALL_SEND_CID.
SDMMC_CMD3	SET_RELATIVE_ADDR.
SDMMC_CMD4	SET_DSR.
SDMMC_CMD5	SD_APP_OP_COND (SDIO only)
SDMMC_CMD6	SWITCH.
SDMMC_CMD7	SELECT/DESELECT_CARD.
SDMMC_CMD8	SEND_IF_COND (SD), SEND_EXT_CSD (MMC)
SDMMC_CMD9	SEND_CSD.
SDMMC_CMD10	SEND_CID.
SDMMC_CMD12	STOP_TRANSMISSION.
SDMMC_CMD13	SEND_STATUS.
SDMMC_CMD16	SET_BLOCKLEN.
SDMMC_CMD17	READ_SINGLE_BLOCK.
SDMMC_CMD18	READ_MULTIPLE_BLOCK.
SDMMC_CMD23	SET_BLOCK_COUNT.
SDMMC_CMD24	WRITE_BLOCK.
SDMMC_CMD25	WRITE_MULTIPLE_BLOCK.
SDMMC_CMD32	ERASE_WR_BLK_START.
SDMMC_CMD33	ERASE_WR_BLK_END.
SDMMC_CMD38	ERASE.
SDMMC_CMD52	IO_RW_DIRECT (SDIO only)
SDMMC_CMD53	IO_RW_EXTENDED (SDIO only)
SDMMC_CMD55	APP_CMD.
SDMMC_CMD58	READ_OCR (SPI mode only)
SDMMC_CMD59	CRC_ON_OFF (SPI mode only)
SDMMC_ACMD6	SET_BUS_WIDTH.
SDMMC_ACMD13	SD_STATUS.
SDMMC_ACMD23	SET_WR_BLK_ERASE_COUNT.
SDMMC_ACMD41	SD_APP_OP_COND.
SDMMC_ACMD51	SEND_SCR.

Definition at line 202 of file sdmmc.h.

◆ sdmmc_csd_version_t

enum sdmmc_csd_version_t

CSD Register Versions (SD Memory Card and MMC)

Enumerator
SDMMC_CSD_V1	CSD Version 1.0 (SDSC and MMC)
SDMMC_CSD_V2	CSD Version 2.0 (SDHC/SDXC) or Version 1.1 (MMC)
SDMMC_CSD_V3	CSD Version 3.0 (SDUC) or Version 1.2 (MMC)
SDMMC_CSD_Vx	Reserved (SD) or Version in EXT_CSD (MMC)

Definition at line 622 of file sdmmc.h.

◆ sdmmc_event_t

enum sdmmc_event_t

Events generated by SDIO/SD/MMC high level API.

Definition at line 927 of file sdmmc.h.

◆ sdmmc_resp_t

enum sdmmc_resp_t

SDIO/SD/MMC Response types.

See also: Physical Layer Simplified Specification Version 9.00, Section 9.00 [sdcard.org] and
JEDEC Standard No. JESD84-B42, MultiMediaCard (MMC) Electrical Standard, High Capacity (MMCA, 4.2), Section 7.10 for R4 and R5 [jedec.org]

Enumerator
SDMMC_NO_R	No response expected.
SDMMC_R1	Normal Response [48 bit (32 bit card status)].
SDMMC_R1B	Normal Response [48 bit (R1 with optional busy signal on DAT0)].
SDMMC_R2	CID/CSD [136 bit (128 bit CID or CSD)].
SDMMC_R3	OCR Resister [48 bit (32 bit OCR)].
SDMMC_R4	Fast I/O [48 bit (16 bit RCA, 1 bit status, 7 bit addr, 8 bit reg)].
SDMMC_R5	Interrupt Request [48 bit (16 bit RCA, 16 bit not defined)
SDMMC_R6	Published RCA Response [48 bit (16 bit RCA, 16 bit card status)
SDMMC_R7	Card Interface Condition [48 bit] (32 bit data, see section 4.9.6)

Definition at line 259 of file sdmmc.h.

◆ sdmmc_xfer_type_t

enum sdmmc_xfer_type_t

Data transfer types.

Enumerator
SDMMC_MULTIBYTE	Transfer 1 to READ_BL_LEN/WRITE_BL_LEN bytes.
SDMMC_BLOCK	Transfer block with size of READ_BL_LEN/WRITE_BL_LEN.
SDMMC_STREAM	Transfer until CMD12 is sent (MMC and 1-bit bus only)

Definition at line 886 of file sdmmc.h.

Function Documentation

◆ sdmmc_card_init()

int sdmmc_card_init ( sdmmc_dev_t * dev )

Card Initialization and Identification.

This function identifies the type of used SDIO/SD/MMC Cards and initializes them according to the standardized procedure specified in:

Physical Layer Simplified Specification Version 9.00, Section 4.2.3 Card Initialization and Identification Process, pp. 43 [sdcard.org]
SDIO Simplified Specification Version 3.00, Section 3.1.2 Initialization by I/O Aware Host, pp. 17 [sdcard.org]
SD Host Controller Simplified Specification Version 4.20, Section 3.6 Card Initialization and Identification (for SD I/F), pp. 160 [sdcard.org]
JEDEC Standard No. JESD84-B42, MultiMediaCard (MMC) Electrical Standard, High Capacity (MMCA, 4.2), Section 7.2 Card Identification Mode, p. 24 and Figure 16 on p. 16 [jedec.org]

Identified card types are:

SD Memory Cards with Standard Capacity (SDSC) Version 1.x, Version 2.x+
SD Memory Cards with High or Extended Capacity (SDHC/SDXC)
SDIO Cards, not supported yet
Combined SDIO/SD Memory Cards (Combo Cards), SDIO part not supported yet
MultiMedia Cards (MMC) and Embedded Multimedia Cards (eMMC)

Warning: If the low-level SDIO/SD/MMC peripheral driver defines its own sdmmc_driver_t::card_init function, this function is used instead.
However, the low-level SDIO/SD/MMC peripheral driver should define its own sdmmc_driver_t::card_init function only in very special cases, e.g. when special hardware handling is required. Otherwise it is strongly recommended to set sdmmc_driver_t::card_init to NULL and to use the default procedure implemented by sdmmc_send_acmd.

See also: sdmmc_driver_t::card_init

Precondition: dev must not be NULL.

Parameters

[in] dev SDIO/SD/MMC device to be used

Return values

0	on success
-ENODEV	if card is not present or not usable
-ENOTSUP	if card is not supported or can't operate under supplied voltage
-EFAULT	on card status error
-ETIMEDOUT	on card initialization and identification timeout
-EBADMSG	on CRC7 error
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_erase_blocks()

int sdmmc_erase_blocks	(	sdmmc_dev_t *	dev,
		uint32_t	block_addr,
		uint16_t	block_num
	)

Erase a number of blocks.

Erase block_num blocks starting at block address block_addr on SD/MMC Card device.

The starting block address is always specified as block address independent on the actual addressing scheme of used card. The driver takes care of mapping to byte addressing if needed.

Note: This function is only available for SD Memory Cards, MMC Cards or the SD Memory Card portion of a combined SDIO/SD Memory Card (Combo Card). Calling this function for a SDIO only card returns the -ENOTSUP error.; sdmmc_card_init is called implicitly if necessary.

Precondition: dev must not be NULL. block_num has to be greater than 0.

Parameters

[in]	dev	SD/MMC device to be used
[in]	block_addr	Start address for erase given as block address
[in]	block_num	Number of blocks to be erased

Return values

0	on success, `block_num` blocks were erased successfully
-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support erase operation or a command used
-EBUSY	if card is busy
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EBADMSG	on CRC7 error in response
-EINVAL	on invalid erase parameters
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_get_capacity()

uint64_t sdmmc_get_capacity ( sdmmc_dev_t * dev )

Get Capacity of SD/MMC Card.

Get the capacity of a SD/MMC Card device.

Note: This function is only available for SD Memory Cards, MMC Cards or the SD Memory Card portion of a combined SDIO/SD Memory Card (Combo Card). Calling this function for a SDIO only card returns the -ENOTSUP error.; sdmmc_card_init is called implicitly if necessary.

Precondition: dev must not be NULL.

Parameters

[in] dev SD/MMC device to be used

Returns: the capacity in in byte or 0 on error

◆ sdmmc_get_dev()

static sdmmc_dev_t * sdmmc_get_dev ( unsigned num )

inlinestatic

Retrieve SDIO/SD/MMC device descriptor reference from device index.

The function converts the device index to the corresponding SDIO/SD/MMC device descriptor. See also sdmmc_devs.

Parameters

[in] num SDIO/SD/MMC peripheral index

Return values

pointer	to the SDIO/SD/MMC device descriptor at index `num` on success
NULL	if `num` is greater than the number of SDIO/SD/MMC device descriptors

Definition at line 1454 of file sdmmc.h.

◆ sdmmc_init()

static void sdmmc_init ( sdmmc_dev_t * dev )

inlinestatic

Basic initialization of the given SDIO/SD/MMC device.

The function calls the low-level SDIO/SD/MMC peripheral driver function sdmmc_driver_t::init for the basic initialization of the SDIO/SD/MMC peripheral including the configuration of used pins.

If the auto_init module is enabled, it is called automatically during the startup. Otherwise, it has to be called before the SDIO/SD/MMC device is used for the first time.

Errors like configuration parameter problems are not signaled by return values, but by using the assert().

See also: sdmmc_driver_t::init

Precondition: dev must not be NULL.

Parameters

[in] dev SDIO/SD/MMC device to initialize

Definition at line 1478 of file sdmmc.h.

◆ sdmmc_read_blocks()

int sdmmc_read_blocks	(	sdmmc_dev_t *	dev,
		uint32_t	block_addr,
		uint16_t	block_size,
		uint16_t	block_num,
		void *	data,
		uint16_t *	done
	)

Read a number of blocks.

Read block_num blocks with size block_size from dev starting at block address block_addr to buffer data.

The starting block address is always specified as block address independent on the actual addressing scheme of used card. The driver takes care of mapping to byte addressing if needed.

If the parameter done is not NULL, the function returns the number of read blocks.

Warning: The buffer data may need to be word-aligned depending on CPU-specific requirements. sdmmc_buf_t or SDMMC_CPU_DMA_REQUIREMENTS have to be used to define the buffer:
sdmmc_buf_t buffer[SDMMC_SDHC_BLOCK_SIZE];

...

SDMMC_CPU_DMA_REQUIREMENTS uint8_t buffer[SDMMC_SDHC_BLOCK_SIZE];

Note: sdmmc_card_init is called implicitly if necessary.

Precondition: dev and data must not be NULL.

Parameters

[in]	dev	SDIO/SD/MMC device to be used
[in]	block_addr	Start address to read from given as block address
[in]	block_size	Block size dependent on card and mode used 512 bytes for block-oriented transfers (SDSC V2.x/SDHC/SDXC) 1, 2, 4, ... 4096 for block-oriented transfers (MMC) 512, 1024, 2048 for block-oriented transfers (SDSC V1.x) 1...512 bytes in byte/multibyte mode (SDIO only) 0 in stream mode (MMC only)
[in]	block_num	Number of blocks: 1, ... for block-oriented transfers (SD Card/MMC) 1 in byte/multibyte mode (SDIO only) 0 in stream mode (MMC only)
[out]	data	Buffer for read data
[out]	done	Number of read blocks, can be `NULL`

Return values

0	on success, `block_num` blocks were read successfully
-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support a used command or is in wrong state
-EBUSY	if card is busy
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EINVAL	on invalid transfer parameters
-EBADMSG	on CRC7 error
-ENOMEM	on RX FIFO overflow error
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_read_sds()

int sdmmc_read_sds	(	sdmmc_dev_t *	dev,
		sdmmc_sd_status_t *	sds
	)

Read SD Status Register.

Read the SD Status register of a SD Memory Card using ACMD13 and stores the results in the sds of type sdmmc_sd_status_t.

Note: This function is only available for SD Memory Cards or the SD Memory Card portion of a combined SDIO/SD Memory Card (Combo Card). Calling this function for a SDIO only card returns the -ENOTSUP error.; sdmmc_card_init is called implicitly if necessary.

Precondition: dev and sds must not be NULL.

Parameters

[in]	dev	SD device to be used
[out]	sds	SD Status register content

Return values

0	on success
-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support the operation
-EBUSY	if card is busy
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EINVAL	on invalid transfer parameters
-EBADMSG	on CRC7 error
-ENOMEM	on RX FIFO overflow error
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_send_acmd()

int sdmmc_send_acmd	(	sdmmc_dev_t *	dev,
		sdmmc_cmd_t	cmd_idx,
		uint32_t	arg,
		sdmmc_resp_t	resp_type,
		uint32_t *	resp
	)

Send application specific command optionally wait for response.

Send an application specific command cmd_idx with argument arg to the SDIO/SD/MMC Card. This function is a convenience function that uses the low-level SDIO/SD/MMC peripheral driver function sdmmc_driver_t::send_cmd. It just sends CMD55 before sending the command with index cmd_idx to the card. Addressed (point-to-point) commands are sent to the card that is currently selected.

Instead of using this function, the following could also be used:

sdmmc_send_cmd(dev, SDMMC_CMD55, RCA, SDMMC_R1, NULL);

sdmmc_send_cmd(dev, cmd_idx & ~SDMMC_ACMD_PREFIX, arg, resp_type, resp);

SDMMC_ACMD_PREFIX

#define SDMMC_ACMD_PREFIX

Application specific command index prefix (Bit is 7 used)

Definition sdmmc.h:186

sdmmc_send_cmd

int sdmmc_send_cmd(sdmmc_dev_t *dev, sdmmc_cmd_t cmd_idx, uint32_t arg, sdmmc_resp_t resp_type, uint32_t *resp)

Send command to SDIO/SD/MMC Card and optionally wait for response.

SDMMC_CMD55

@ SDMMC_CMD55

APP_CMD.

Definition sdmmc.h:227

SDMMC_R1

@ SDMMC_R1

Normal Response [48 bit (32 bit card status)].

Definition sdmmc.h:261

Note: sdmmc_card_init is called implicitly if necessary.

Warning: The command index must be an ACMD command index, i.e. the command index ORed with SDMMC_ACMD_PREFIX. Otherwise the function fails because of an assertion.

resp_type specifies the response expected.

The response is stored word-wise in host byte order in the buffer provided by resp as follows:

resp_type = SDMMC_NO_R (No Response): resp can be NULL
resp_tpye = SDMMC_R2 (Long Response): resp = { R[127:96], R[95:64], R[63:32], R[31:0] }
resp_type = anything else (Short Response): resp = { R[39:8] }

The buffer provided by resp can be NULL if the response is not needed. However, the low-level SDIO/SD/MMC peripheral driver must receive the expected response, but does not store it in resp in that case.

Note: R3 does not use CRC7 in CRC field but a fixed value of 0b111111. The low-level SDIO/SD/MMC peripheral driver must not check the CRC field for this response.

Precondition: dev must not be NULL. cmd_idx must be in range 0 to 63.

Parameters

[in]	dev	SDIO/SD/MMC device to be used
[in]	cmd_idx	Command index of an application specific command
[in]	arg	Command argument
[in]	resp_type	Type of response expected
[out]	resp	Buffer of 32-bit words to store the response

Return values

-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support the command or is in wrong state
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EBADMSG	on CRC7 error in response
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_send_cmd()

int sdmmc_send_cmd	(	sdmmc_dev_t *	dev,
		sdmmc_cmd_t	cmd_idx,
		uint32_t	arg,
		sdmmc_resp_t	resp_type,
		uint32_t *	resp
	)

Send command to SDIO/SD/MMC Card and optionally wait for response.

Send the command cmd_idx with argument arg to the SDIO/SD/MMC card. resp_type specifies the type of the response expected. Addressed (point-to-point) commands are sent to the card that is currently selected.

This function just calls the low-level SDIO/SD/MMC peripheral driver function sdmmc_driver_t::send_cmd.

Note: sdmmc_card_init is called implicitly if necessary.

Warning: For application specific commands, the sdmmc_send_acmd function MUST to be used.

The response is stored word-wise in host byte order in the buffer provided by resp as follows:

resp_type = SDMMC_NO_R (No Response): resp can be NULL
resp_tpye = SDMMC_R2 (Long Response): resp = { R[127:96], R[95:64], R[63:32], R[31:0] }
resp_type = anything else (Short Response): resp = { R[39:8] }

The buffer provided by resp can be NULL if the response is not needed.

Note: R3 does not use CRC7 in CRC field but a fixed value of 0b111111. The low-level SDIO/SD/MMC peripheral driver must not check the CRC field for this response.

See also: sdmmc_driver_t::send_cmd

Precondition: dev must not be NULL.

Parameters

[in]	dev	SDIO/SD/MMC device to be used
[in]	cmd_idx	Command index
[in]	arg	Command argument
[in]	resp_type	Type of response expected
[out]	resp	Buffer of 32-bit words to store the response if needed, otherwise NULL

Return values

-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support the command or is in wrong state
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EBADMSG	on CRC7 error in response
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_write_blocks()

int sdmmc_write_blocks	(	sdmmc_dev_t *	dev,
		uint32_t	block_addr,
		uint16_t	block_size,
		uint16_t	block_num,
		const void *	data,
		uint16_t *	done
	)

Write a number of blocks.

Write block_num blocks with size block_size to dev starting at block address block_addr from buffer data.

The starting block address is always specified as block address independent on the actual addressing scheme of used card. The driver takes care of mapping to byte addressing if needed.

If the parameter done is not NULL, the function returns the number of written blocks.

Warning: The buffer data may need to be word-aligned depending on CPU-specific requirements. sdmmc_buf_t or SDMMC_CPU_DMA_REQUIREMENTS have to be used to define the buffer:
sdmmc_buf_t buffer[SDMMC_SDHC_BLOCK_SIZE];

...

SDMMC_CPU_DMA_REQUIREMENTS uint8_t buffer[SDMMC_SDHC_BLOCK_SIZE];

Note: sdmmc_card_init is called implicitly if necessary.

Precondition: dev and data must not be NULL.

Parameters

[in]	dev	SDIO/SD/MMC device to be used
[in]	block_addr	Start address to write to given as block address
[in]	block_size	Block size dependent on card and mode used 512 bytes for block-oriented transfers (SDSC V2.x/SDHC/SDXC) 1, 2, 4, ... 4096 for block-oriented transfers (MMC) 512, 1024, 2048 for block-oriented transfers (SDSC V1.x) 1...512 bytes in byte/multibyte mode (SDIO only) 0 in stream mode (MMC only)
[in]	block_num	Number of blocks: 1, ... for block-oriented transfers (SD and MMC) 1 in byte/multibyte mode (SDIO only) 0 in stream mode (MMC only)
[in]	data	Buffer with data to write
[out]	done	Number of blocks written, can be `NULL`

Return values

0	on success, `block_num` blocks were read successfully
-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support a used command or is in wrong state
-EBUSY	if card is busy
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EINVAL	on invalid transfer parameters
-EBADMSG	on CRC7 error
-ENOMEM	on TX FIFO underrun error
-EIO	on not further specified error incl. hardware errors

◆ sdmmc_xfer()

int sdmmc_xfer	(	sdmmc_dev_t *	dev,
		sdmmc_cmd_t	cmd_idx,
		uint32_t	arg,
		uint16_t	block_size,
		uint16_t	block_num,
		const void *	data_wr,
		void *	data_rd,
		uint16_t *	done
	)

Perform a data transfer with the selected card or embedded device.

This high-level SDIO/SD/MMC device API function performs a read or write data transfer either

block-oriented with a number of blocks of the same size (SD and MMC)
as stream until the stop command (CMD12) is sent by the host (MMC only)
in byte or multi-byte mode (SDIO only)

The possible block sizes block_size depend on the card and mode used. For block-oriented data transfers, the block size is usually 512 bytes, but may differ for MMCs and SD Cards with Standard Capacity Version 1.x (SDSC):

MMC: block size can be 1, 2, 4, ..., 4096 bytes (as power of 2)
SDSC V1.x: block size can be 512, 1024 or 2048 bytes
SDSC V2.x and later, SDSC/SDHC: block size is 512 bytes

The block size for SDIO transfers in byte or multi-byte mode, if supported, can be in the range of 1 to 512 bytes. The number of blocks block_num MUST be 1 in this case.

For a data transfer as a stream, the block size block_size and the number of blocks block_num are 0.

Note: Some block-oriented data transfers such as reading the SD Card Configuration register (SCR) with ACMD51 may use the sdmmc_xfer function with smaller block size, for example only 8 bytes. The low-level SDIO/SD/MMC peripheral driver MUST support block sizes smaller than the usual block size used for block-oriented operations.

The sdmmc_xfer function uses the low-level SDIO/SD/MMC peripheral driver functions sdmmc_driver_t::xfer_prepare to prepare the data transfer, sdmmc_driver_t::xfer_execute to perform the data transfer, and sdmmc_driver_t::xfer_finish to complete the data transfer. In detail:

_wait_for_ready(dev);
if (cmd_idx & SDMMC_ACMD_PREFIX) {
    sdmmc_send_cmd(dev, SDMMC_CMD55, ...);
}
dev->driver->xfer_prepare(dev, xfer);
sdmmc_send_cmd(dev, cmd_idx, ...);
dev->driver->xfer_execute(dev, xfer, ...);
if (block_num > 1) {
   sdmmc_send_cmd(dev, SDMMC_CMD12, ...);
}
dev->driver->xfer_finish(dev, xfer);

xfer is the transfer descriptor of type sdmmc_xfer_desc_t that contains all transfer parameters.

If the parameter done is not NULL, the function returns the number of transferred blocks.

Warning: The buffers specified by data_wr and data_rd may need to be word-aligned depending on CPU-specific requirements. sdmmc_buf_t or SDMMC_CPU_DMA_REQUIREMENTS have to be used to define such buffers:
sdmmc_buf_t buffer[SDMMC_SDHC_BLOCK_SIZE];

...

SDMMC_CPU_DMA_REQUIREMENTS uint8_t buffer[SDMMC_SDHC_BLOCK_SIZE];

Note: sdmmc_card_init is called implicitly if necessary.

See also: sdmmc_driver_t::xfer_prepare, sdmmc_driver_t::xfer_execute and sdmmc_driver_t::xfer_finish

Precondition: dev must not be NULL.
data_rd must not be NULL for read transfers and data_wr must not be NULL for write transfers.

Parameters

[in]	dev	SDIO/SD/MMC device to be used
[in]	cmd_idx	Command index or application specific command index
[in]	arg	Command argument
[in]	block_size	Block size dependent on card and mode used 512 bytes for block-oriented transfers (SDSC V2.x/SDHC/SDXC) 1, 2, 4, ... 4096 for block-oriented transfers (MMC) 512, 1024, 2048 for block-oriented transfers (SDSC V1.x) 1...512 bytes in byte/multibyte mode (SDIO) 0 in stream mode (SDIO)
[in]	block_num	Number of blocks: 1, ... for block-oriented transfers (SD Card/MMC) 1 in byte/multibyte mode (SDIO) 0 in stream mode (MMC)
[in]	data_wr	Buffer with data to write in write transfers, NULL otherwise
[out]	data_rd	Buffer for data to read in read transfers, NULL otherwise
[out]	done	Number of transferred blocks, can be `NULL`

Return values

0	on success
-ENODEV	if card is not present or not usable
-ENOTSUP	if card does not support a used command or is in wrong state
-EBUSY	if card is busy
-EFAULT	on card status error
-ETIMEDOUT	on timeout condition
-EINVAL	on invalid transfer parameters
-EBADMSG	on CRC7 error
-ENOMEM	on RX FIFO overflow or TX FIFO underrun error
-EIO	on not further specified error incl. hardware errors

Variable Documentation

◆ sdmmc_devs

sdmmc_dev_t sdmmc_devs[]

SDIO/SD/MMC device descriptor references as read-only XFA.

The array contains the references to all SDIO/SD/MMC device descriptors. The i-th device in this array can then be accessed with sdmmc_devs[i]. The number of SDIO/SD/MMC device descriptor references defined in this array is XFA_LEN(sdmmc_devs), see SDMMC_NUMOF.

Warning: To ensure to have the references to all SDIO/SD/MMC device descriptors in this array, the low-level SDIO/SD/MMC peripheral drivers must define the references to their SDIO/SD/MMC device descriptors as XFA members by using the macro XFA_CONST(sdmmc_dev_t *, sdmmc_devs, 0) as shown in the example below.

For example, if the low-level SDIO/SD/MMC peripheral driver defines an MCU-specific SDIO/SD/MMC device descriptor structure _mcu_sdmmc_dev_t and defines the device descriptors in an array _mcu_sdmmc_dev, it must define the references to them as members of the XFA sdmmc_devs as follows:

typedef struct {
    sdmmc_dev_t sdmmc_dev;      // Inherited sdmmc_dev_t struct
    const sdmmc_conf_t *config; // SDIO/SD/MMC peripheral config
    ...
} _mcu_sdmmc_dev_t;
 
static _mcu_sdmmc_dev_t _mcu_sdmmc_devs[] = {
    {
        ...
    },
    {
        ...
    },
};
 
XFA_CONST(sdmmc_dev_t * const, sdmmc_devs, 0) _sdmmc_1 = (sdmmc_dev_t * const)&_mcu_sdmmc_devs[0];
XFA_CONST(sdmmc_dev_t * const, sdmmc_devs, 0) _sdmmc_2 = (sdmmc_dev_t * const)&_mcu_sdmmc_devs[1];

Definition at line 1434 of file sdmmc.h.

Detailed Description

Overview

Limitations:

Features and Modules

Files

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Command and Response related definitions

SDIO/SD/MMC Card status as returned in responses R1 to CMD13 with b[15]=0

CSD Register Definitions

Definitions used for CMD8 - SEND_IF_COND (SD only)

OCR Register Definition

SD Status register (SD Memory Cards)

CID register (SD Memory and MMC Cards)

SCR Register Definitions (SD Memory Card only)

Macro Definition Documentation

◆ SDMMC_ACMD

◆ SDMMC_ACMD_PREFIX

◆ sdmmc_buf_t

◆ SDMMC_CARD_STATUS_ADDRESS_ERROR

◆ SDMMC_CARD_STATUS_AKE_SEQ_ERROR

◆ SDMMC_CARD_STATUS_APP_CMD

◆ SDMMC_CARD_STATUS_BLOCK_LEN_ERROR

◆ SDMMC_CARD_STATUS_CARD_ECC_DISABLED

◆ SDMMC_CARD_STATUS_CARD_ECC_FAILED

◆ SDMMC_CARD_STATUS_CARD_IS_LOCKED

◆ SDMMC_CARD_STATUS_CC_ERROR

◆ SDMMC_CARD_STATUS_COM_CRC_ERROR

◆ SDMMC_CARD_STATUS_CSD_OVERWRITE

◆ SDMMC_CARD_STATUS_CURRENT_STATE

◆ SDMMC_CARD_STATUS_CURRENT_STATE_Pos

◆ SDMMC_CARD_STATUS_ERASE_PARAM

◆ SDMMC_CARD_STATUS_ERASE_RESET

◆ SDMMC_CARD_STATUS_ERASE_SEQ_ERROR

◆ SDMMC_CARD_STATUS_ERROR

◆ SDMMC_CARD_STATUS_ERRORS

◆ SDMMC_CARD_STATUS_FX_EVENT

◆ SDMMC_CARD_STATUS_ILLEGAL_COMMAND

◆ SDMMC_CARD_STATUS_LOCK_UNLOCK_FAILED

◆ SDMMC_CARD_STATUS_OUT_OF_RANGE

◆ SDMMC_CARD_STATUS_OVERRUN

◆ SDMMC_CARD_STATUS_READY_FOR_DATA

◆ SDMMC_CARD_STATUS_SWITCH_ERROR

◆ SDMMC_CARD_STATUS_UNDERRUN

◆ SDMMC_CARD_STATUS_WP_ERASE_SKIP

◆ SDMMC_CARD_STATUS_WP_VIOLATION

◆ SDMMC_CARD_TYPE_SD

◆ SDMMC_CID_OID_SIZE_SD

◆ SDMMC_CID_PNM_SIZE_MMC

◆ SDMMC_CID_PNM_SIZE_SD

◆ SDMMC_CID_REG_SIZE

◆ SDMMC_CMD

◆ SDMMC_CMD8_CHECK

◆ SDMMC_CMD8_CHECK_PATTERN

◆ SDMMC_CMD8_PCIE_12V

◆ SDMMC_CMD8_PCIE_AVAIL

◆ SDMMC_CMD8_VHS_27_36V

◆ SDMMC_CMD_ARG_RCA

◆ SDMMC_CMD_NO_ARG

◆ SDMMC_CPU_DMA_REQUIREMENTS

◆ SDMMC_CSD_REG_SIZE

◆ SDMMC_DEV

◆ SDMMC_EXT_CSD_REG_SIZE

◆ SDMMC_NUMOF

◆ SDMMC_OCR_18V

◆ SDMMC_OCR_27_28V

◆ SDMMC_OCR_28_29V

◆ SDMMC_OCR_29_30V

◆ SDMMC_OCR_30_31V

◆ SDMMC_OCR_31_32V

◆ SDMMC_OCR_32_33V

◆ SDMMC_OCR_33_34V

◆ SDMMC_OCR_34_35V

◆ SDMMC_OCR_35_36V

◆ SDMMC_OCR_ALL_VOLTAGES

◆ SDMMC_OCR_CCS