eeprom.c File Reference

Driver for the 24xx16 and 24xx256 I2C EEPROMS (implementation). More...

#include "eeprom.h"
#include <cfg/debug.h>
#include <appconfig.h>
#include <cfg/macros.h>
#include <cpu/attr.h>
#include <CPU_HEADER(twi)>
#include <drv/wdt.h>
#include <mware/byteorder.h>
#include <string.h>

Go to the source code of this file.

Defines
#define	EEPROM_ID   0xA0
	EEPROM ID code.
#define	EEPROM_ADDR(x)   (EEPROM_ID | (((uint8_t)(x)) << 1))
	This macros form the correct slave address for EEPROMs.
Functions
static bool	eeprom_writeRaw (e2addr_t addr, const void *buf, size_t count)
	Copy count bytes from buffer buf to eeprom at address addr.
bool	eeprom_read (e2addr_t addr, void *buf, size_t count)
	Copy count bytes at address addr from eeprom to RAM to buffer buf.
bool	eeprom_write_char (e2addr_t addr, char c)
	Write a single character c at address addr.
int	eeprom_read_char (e2addr_t addr)
	Read a single character at address addr.
void	eeprom_erase (e2addr_t addr, size_t count)
	Erase specified part of eeprom, writing 0xFF.
void	eeprom_init (void)
	Initialize TWI module.

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Detailed Description

Driver for the 24xx16 and 24xx256 I2C EEPROMS (implementation).

Note:

This implementation is AVR specific.

Version:

Id

eeprom.c 930 2007-10-23 14:48:48Z batt

Author:

Stefano Fedrigo <aleph@develer.com>

Bernardo Innocenti <bernie@develer.com>

Definition in file eeprom.c.

---

Function Documentation

void eeprom_erase	(	e2addr_t	addr,
		size_t	count
	)

Erase specified part of eeprom, writing 0xFF.

Parameters:

	addr	starting address
	count	length of block to erase

Definition at line 276 of file eeprom.c.

bool eeprom_read	(	e2addr_t	addr,
		void *	buf,
		size_t	count
	)

Copy count bytes at address addr from eeprom to RAM to buffer buf.

Returns:

true on success.

Definition at line 205 of file eeprom.c.

int eeprom_read_char

(

e2addr_t

addr

)

Read a single character at address addr.

Returns:

the requested character or -1 in case of failure.

Definition at line 259 of file eeprom.c.