nvmem_at45d.c File Reference

Non-volatile memory support using Atmel AT45 serial DataFlash memory chips. More...

#include <cfg/eeprom.h>
#include <cfg/memory.h>
#include <dev/board.h>
#include <dev/spi_at45d.h>
#include <sys/nutdebug.h>
#include <stdlib.h>
#include <string.h>
#include <memdebug.h>
#include <dev/nvmem_at45d.h>

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Functions
size_t	SpiAt45dConfigSize (void)
	Get size of configuration area.
int	SpiAt45dConfigRead (size_t pos, void *data, size_t len)
	Load configuration parameters from flash memory.
int	SpiAt45dConfigWrite (size_t pos, CONST void *data, size_t len)
	Store configuration parameters in flash memory.

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Detailed Description

Non-volatile memory support using Atmel AT45 serial DataFlash memory chips.

 * $Id: nvmem_at45d.c 3560 2011-08-16 10:53:31Z haraldkipp $
 * 

Definition in file nvmem_at45d.c.

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Function Documentation

size_t SpiAt45dConfigSize

(

void

)

Get size of configuration area.

A part of the DataFlash may be used to store configuration parameters, like the network interface MAC address, the local hostname etc. The size of this area may be configured by defining NUT_CONFIG_AT45D_SIZE. Otherwise one full page is used.

Returns:

The number of bytes available for configuration data. In case of an error, 0 is returned.

Definition at line 134 of file nvmem_at45d.c.

References SpiAt45dPageSize().

Referenced by ShowHardwareConfiguration(), SpiAt45dConfigRead(), and SpiAt45dConfigWrite().

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int SpiAt45dConfigRead	(	size_t	pos,
		void *	data,
		size_t	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:

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

Definition at line 157 of file nvmem_at45d.c.

References free(), malloc(), memcpy(), SpiAt45dConfigSize(), and SpiAt45dPageRead().

Referenced by NutNvMemLoad().

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int SpiAt45dConfigWrite	(	size_t	pos,
		CONST void *	data,
		size_t	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.

Definition at line 187 of file nvmem_at45d.c.

References free(), malloc(), memcmp(), memcpy(), SpiAt45dConfigSize(), SpiAt45dPageRead(), SpiAt45dPageSize(), SpiAt45dPageWrite(), and wsize.

Referenced by NutNvMemSave().

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