| /*************************************************************************** |
| copyright : (C) by 2002-2003 Stefano Barbato |
| email : stefano@codesink.org |
| |
| $Id: 24cXX.h 4495 2007-06-27 12:57:50Z khali $ |
| ***************************************************************************/ |
| |
| /*************************************************************************** |
| * * |
| * 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 <linux/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 |
| }; |
| |
| /* |
| * 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, 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 |
| |
