CHIP: LPC18xx/43xx SD/SDIO driver

Detailed Description

Macros
#define	US_TIMEOUT   1000000
	Setup options for the SDIO driver.
#define	MS_ACQUIRE_DELAY   (10)
#define	INIT_OP_RETRIES   50
#define	SET_OP_RETRIES   1000
#define	SDIO_BUS_WIDTH   4
#define	SD_MMC_ENUM_CLOCK   400000
#define	MMC_MAX_CLOCK   20000000
#define	MMC_LOW_BUS_MAX_CLOCK   26000000
#define	MMC_HIGH_BUS_MAX_CLOCK   52000000
#define	SD_MAX_CLOCK   25000000

Functions
STATIC INLINE int32_t	Chip_SDIF_CardNDetect (LPC_SDMMC_T *pSDMMC)
	Detect if an SD card is inserted.
STATIC INLINE int32_t	Chip_SDIF_CardWpOn (LPC_SDMMC_T *pSDMMC)
	Detect if write protect is enabled.
void	Chip_SDIF_Init (LPC_SDMMC_T *pSDMMC)
	Initializes the SD/MMC card controller.
void	Chip_SDIF_DeInit (LPC_SDMMC_T *pSDMMC)
	Shutdown the SD/MMC card controller.
STATIC INLINE void	Chip_SDIF_PowerOff (LPC_SDMMC_T *pSDMMC)
	Disable slot power.
STATIC INLINE void	Chip_SDIF_PowerOn (LPC_SDMMC_T *pSDMMC)
	Enable slot power.
STATIC INLINE void	Chip_SDIF_SetIntMask (LPC_SDMMC_T *pSDMMC, uint32_t iVal)
	Sets the SD interface interrupt mask.
uint32_t	Chip_SDIF_GetIntStatus (LPC_SDMMC_T *pSDMMC)
	Returns the current SD status, clears pending ints, and disables all ints.

Macro Definition Documentation

#define INIT_OP_RETRIES   50

initial OP_COND retries

Definition at line 48 of file sdif_18xx_43xx.h.

#define MMC_HIGH_BUS_MAX_CLOCK   52000000

Type 1 MMC card max clock rate

Definition at line 54 of file sdif_18xx_43xx.h.

#define MMC_LOW_BUS_MAX_CLOCK   26000000

Type 0 MMC card max clock rate

Definition at line 53 of file sdif_18xx_43xx.h.

#define MMC_MAX_CLOCK   20000000

Max MMC clock rate

Definition at line 52 of file sdif_18xx_43xx.h.

#define MS_ACQUIRE_DELAY   (10)

inter-command acquire oper condition delay in msec

Definition at line 47 of file sdif_18xx_43xx.h.

#define SD_MAX_CLOCK   25000000

Max SD clock rate

Definition at line 55 of file sdif_18xx_43xx.h.

#define SD_MMC_ENUM_CLOCK   400000

Typical enumeration clock rate

Definition at line 51 of file sdif_18xx_43xx.h.

#define SDIO_BUS_WIDTH   4

Max bus width supported

Definition at line 50 of file sdif_18xx_43xx.h.

#define SET_OP_RETRIES   1000

set OP_COND retries

Definition at line 49 of file sdif_18xx_43xx.h.

#define US_TIMEOUT   1000000

Setup options for the SDIO driver.

give 1 atleast 1 sec for the card to respond

Definition at line 46 of file sdif_18xx_43xx.h.

Function Documentation

STATIC INLINE int32_t Chip_SDIF_CardNDetect

(

LPC_SDMMC_T *

pSDMMC

)

Detect if an SD card is inserted.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

Returns 0 if a card is detected, otherwise 1

Note

Detect if an SD card is inserted (uses SD_CD pin, returns 0 on card detect)

Definition at line 64 of file sdif_18xx_43xx.h.

STATIC INLINE int32_t Chip_SDIF_CardWpOn

(

LPC_SDMMC_T *

pSDMMC

)

Detect if write protect is enabled.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

Returns 1 if card is write protected, otherwise 0

Note

Detect if write protect is enabled (uses SD_WP pin, returns 1 if card is write protected)

Definition at line 76 of file sdif_18xx_43xx.h.

void Chip_SDIF_DeInit

(

LPC_SDMMC_T *

pSDMMC

)

Shutdown the SD/MMC card controller.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

None

Definition at line 59 of file sdif_18xx_43xx.c.

uint32_t Chip_SDIF_GetIntStatus

(

LPC_SDMMC_T *

pSDMMC

)

Returns the current SD status, clears pending ints, and disables all ints.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

Current pending interrupt status of Or'ed values MCI_INT_*

Definition at line 66 of file sdif_18xx_43xx.c.

void Chip_SDIF_Init

(

LPC_SDMMC_T *

pSDMMC

)

Initializes the SD/MMC card controller.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

None

Definition at line 52 of file sdif_18xx_43xx.c.

STATIC INLINE void Chip_SDIF_PowerOff

(

LPC_SDMMC_T *

pSDMMC

)

Disable slot power.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

None

Note

Uses SD_POW pin, set to low.

Definition at line 101 of file sdif_18xx_43xx.h.

STATIC INLINE void Chip_SDIF_PowerOn

(

LPC_SDMMC_T *

pSDMMC

)

Enable slot power.

Parameters

pSDMMC

: SDMMC peripheral selected

Returns

None

Note

Uses SD_POW pin, set to high.

Definition at line 112 of file sdif_18xx_43xx.h.

STATIC INLINE void Chip_SDIF_SetIntMask	(	LPC_SDMMC_T *	pSDMMC,
		uint32_t	iVal
	)

Sets the SD interface interrupt mask.

Parameters

pSDMMC	: SDMMC peripheral selected
iVal	: Interrupts to enable, Or'ed values MCI_INT_*

Returns

None

Definition at line 123 of file sdif_18xx_43xx.h.