#include <sys/types.h>

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Functions
unsigned long	At49bvInit (void)
unsigned long long	AT49bvReadProtectionRegister (int factory)
	Read user or factory id from protection register.
int	At49bvChipErase (void)
	Erase entire flash memory chip.
int	At49bvSectorErase (unsigned int off)
	Erase sector at the specified offset.
int	At49bvSectorRead (unsigned int off, void *data, unsigned int len)
	Read data from flash memory.
int	At49bvSectorWrite (unsigned int off, const void *data, unsigned int len)
	Write data into flash memory.
int	At49bvParamRead (unsigned int pos, void *data, unsigned int len)
	Load configuration parameters from flash memory.
int	At49bvParamWrite (unsigned int pos, const void *data, unsigned int len)
	Store configuration parameters in flash memory.

Function Documentation

unsigned long At49bvInit ( void )

References FLASH_CMD_ENTER_ID, FLASH_CMD_EXIT_ID, FLASH_COMMAND, and FLASH_UNLOCK.

unsigned long long AT49bvReadProtectionRegister ( int factory )

Read user or factory id from protection register.

Parameters:

factory If true, read factory id, otherwise read user id

Returns:: The ID read, 64 bit long!

References FLASH_CMD_ENTER_ID, FLASH_CMD_EXIT_ID, FLASH_COMMAND, and FLASH_UNLOCK.

int At49bvChipErase ( void )

Erase entire flash memory chip.

References FLASH_CHIP_ERASE_WAIT, FLASH_CMD_ERASE, FLASH_CMD_ERASE_CHIP, FLASH_COMMAND, and FLASH_UNLOCK.

int At49bvSectorErase ( unsigned int off )

Erase sector at the specified offset.

References FLASH_CHIP_BASE, FLASH_CMD_ERASE, FLASH_CMD_ERASE_SECTOR, FLASH_COMMAND, FLASH_ERASE_WAIT, and FLASH_UNLOCK.

Referenced by At49bvParamWrite().

int At49bvSectorRead	(	unsigned int	off,
		void *	data,
		unsigned int	len
	)

Read data from flash memory.

Parameters:

off	Start location within the chip, starting at 0.
data	Points to a buffer that receives the data.
len	Number of bytes to read.

Returns:: 0 on success or -1 in case of an error.

References FLASH_CHIP_BASE, and memcpy().

Referenced by At49bvParamRead(), and At49bvParamWrite().

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int At49bvSectorWrite	(	unsigned int	off,
		const void *	data,
		unsigned int	len
	)

Write data into flash memory.

The related sector must have been erased before calling this function.

Parameters:

off	Start location within the chip, starting at 0.
data	Points to a buffer that contains the bytes to be written.
len	Number of bytes to write.

Returns:: 0 on success or -1 in case of an error.

References FLASH_CHIP_BASE, FLASH_CMD_PROGRAM, FLASH_COMMAND, FLASH_UNLOCK, FLASH_WRITE_POLLS, and rc.

Referenced by At49bvParamWrite().

int At49bvParamRead	(	unsigned int	pos,
		void *	data,
		unsigned int	len
	)

Load configuration parameters from flash memory.

Parameters:

pos	Start location within configuration sector.
data	Points to a buffer that receives the contents.
len	Number of bytes to read.

Returns:: Always 0.

References At49bvSectorRead(), and FLASH_CONF_SECTOR.

Referenced by NutNvMemLoad().

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int At49bvParamWrite	(	unsigned int	pos,
		const void *	data,
		unsigned int	len
	)

Store configuration parameters in flash memory.

Parameters:

pos	Start location within configuration sector.
data	Points to a buffer that contains the bytes to store.
len	Number of bytes to store.

Returns:: 0 on success or -1 in case of an error.

References At49bvSectorErase(), At49bvSectorRead(), At49bvSectorWrite(), FLASH_CONF_SECTOR, FLASH_CONF_SIZE, free(), malloc(), memcmp(), memcpy(), and rc.

Referenced by NutNvMemSave().

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Functions

Function Documentation