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24cXX.h
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24cXX.h
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/***************************************************************************
copyright : (C) by 2003-2004 Stefano Barbato
email : [email protected]
Copyright (C) 2011 by Kris Rusocki <[email protected]>
- support for user-defined write cycle time
$Id: 24cXX.h,v 1.6 2004/02/29 11:05:28 tat Exp $
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef _24CXX_H_
#define _24CXX_H_
#include "i2c-dev.h"
#define EEPROM_TYPE_UNKNOWN 0
#define EEPROM_TYPE_8BIT_ADDR 1
#define EEPROM_TYPE_16BIT_ADDR 2
struct eeprom
{
char *dev; // device file i.e. /dev/i2c-N
int addr; // i2c address
int fd; // file descriptor
int type; // eeprom type
int write_cycle_time;
};
/*
* opens the eeprom device at [dev_fqn] (i.e. /dev/i2c-N) whose address is
* [addr] and set the eeprom_24c32 [e]
*/
int eeprom_open(char *dev_fqn, int addr, int type, int delay, struct eeprom*);
/*
* closees the eeprom device [e]
*/
int eeprom_close(struct eeprom *e);
/*
* read and returns the eeprom byte at memory address [mem_addr]
* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
*/
int eeprom_read_byte(struct eeprom* e, __u16 mem_addr);
/*
* read the current byte
* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
*/
int eeprom_read_current_byte(struct eeprom *e);
/*
* writes [data] at memory address [mem_addr]
* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
*/
int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data);
#endif