XgAt91SpiMmc

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Detailed Description

Low Level Multimedia Card Access.

Defines
#define	MMC_PIO_ASR   PIOA_ASR
#define	MMC_PIO_BSR   PIOA_BSR
#define	MMC_PIO_PDR   PIOA_PDR
#define	MMC_PINS_A   (_BV(MMC_DATAOUT_BIT) | _BV(MMC_DATAIN_BIT) | _BV(MMC_CLK_BIT))
#define	MMC_PINS_B   0
#define	MMC_CS_PER   PIOA_PER
#define	MMC_CS_OER   PIOA_OER
#define	MMC_CS_SODR   PIOA_SODR
#define	MMC_CS_CODR   PIOA_CODR
#define	MMC_SPI_CR   SPI0_CR
#define	MMC_SPI_MR   SPI0_MR
#define	MMC_SPI_RDR   SPI0_RDR
#define	MMC_SPI_TDR   SPI0_TDR
#define	MMC_SPI_SR   SPI0_SR
#define	MMC_SPI_CSR1   SPI0_CSR1
#define	MMC_SPI_ID   SPI0_ID
Functions
int	At91SpiMmCard0Avail (void)
	Check if card is available in slot 0.
int	At91SpiMmCard0WrProt (void)
	Check if card in slot 0 is write protected.
Variables
NUTDEVICE	devAt91SpiMmc0
	Multimedia card device information structure.
NUTDEVICE	devAt91SpiMmc0
	Multimedia card device information structure.

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Function Documentation

int At91SpiMmCard0Avail (  void   )

Check if card is available in slot 0. Todo: Card change should verify the card identifier. Right now any detection of removing and re-inserting a card counts as a card change. Returns: 0 if no card is detected, 1 if a card is available or 2 if a card change had been detected after the last mount.

int At91SpiMmCard0WrProt (  void   )

Check if card in slot 0 is write protected. Todo: Not implemented. Returns: Always 0.

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Variable Documentation

NUTDEVICE devAt91SpiMmc0

Multimedia card device information structure. A pointer to this structure must be passed to NutRegisterDevice() to bind this driver to the Nut/OS kernel. An application may then call /verbatim _open("MMC0:", _O_RDWR | _O_BINARY); /endverbatim to mount the first active primary partition with any previously registered file system driver (typically devPhat0).

NUTDEVICE devAt91SpiMmc0

Initial value: { 0, {'M', 'M', 'C', '0', 0, 0, 0, 0, 0} , 0, 0, 0, &mmc0_ifc, 0, At91SpiMmcIfcInit, MmCardIOCtl, MmCardBlockRead, MmCardBlockWrite, MmCardBlockWrite_P, MmCardMount, MmCardUnmount, 0 } Multimedia card device information structure. A pointer to this structure must be passed to NutRegisterDevice() to bind this driver to the Nut/OS kernel. An application may then call /verbatim _open("MMC0:", _O_RDWR | _O_BINARY); /endverbatim to mount the first active primary partition with any previously registered file system driver (typically devPhat0).

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