Low Level MMC Interface

Routines for using the SPI interface of the Ethernut CPLD. More...

Collaboration diagram for Low Level MMC Interface:

Data Structures
struct	_MMCDCB
	Private data of NPL card interface. More...
Defines
#define	I2C_SLA_PLL   0x69
Typedefs
typedef struct _MMCDCB	MMCDCB
	Private data of NPL card interface.
Functions
int	NplMmCard0Avail (void)
	Check if card is available.
int	NplMmCard0WrProt (void)
	Check if card is write protected.
Variables
NUTDEVICE	devNplMmc0
	Multimedia card device information structure.
NUTDEVICE	devSbiMmc0
	Multimedia card device information structure.
NUTDEVICE	devNplMmc0
	Multimedia card device information structure.

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Detailed Description

Routines for using the SPI interface of the Ethernut CPLD.

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Define Documentation

#define I2C_SLA_PLL   0x69

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Typedef Documentation

typedef struct _MMCDCB MMCDCB

Private data of NPL card interface.

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Function Documentation

int NplMmCard0Avail

(

void

)

Check if card is available.

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.

References _MMCDCB::dcb_avail, and _MMCDCB::dcb_changed.

int NplMmCard0WrProt

(

void

)

Check if card is write protected.

Todo:

Not implemented.

Returns:

Always 0.

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Variable Documentation

NUTDEVICE devNplMmc0

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 devSbiMmc0

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 devNplMmc0

Initial value:

 {
    0,                          
    {'M', 'M', 'C', '0', 0, 0, 0, 0, 0}
    ,                           
    0,                          
    0,                          
    0,                          
    &mmc0_ifc,                  
    &mmc0_dcb,                  
    NplMmcIfcInit,              
    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).