4 * This file is part of BeRTOS.
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14 * GNU General Public License for more details.
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18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
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29 * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
30 * All Rights Reserved.
33 * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (interface)
37 * \author Stefano Fedrigo <aleph@develer.com>
38 * \author Bernardo Innocenti <bernie@develer.com>
45 #include <cfg/compiler.h>
46 #include <appconfig.h>
49 * \name Values for CONFIG_EEPROM_TYPE
52 #define EEPROM_24XX16 1
53 #define EEPROM_24XX256 2
56 #if CONFIG_EEPROM_TYPE == EEPROM_24XX16
57 #define EEPROM_BLKSIZE 0x10 ///< Eeprom block size (16byte)
58 #define EEPROM_SIZE 0x800 ///< Eeprom total size (2kB)
59 #elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
60 #define EEPROM_BLKSIZE 0x40 ///< Eeprom block size (64byte)
61 #define EEPROM_SIZE 0x8000 ///< Eeprom total size (32kB)
63 #error Unsupported EEPROM type.
66 /// Type for EEPROM addresses
67 typedef uint16_t e2addr_t;
70 * Macro for E2Layout offset calculation
72 * \note We can't just use offsetof() here because we could use
73 * non-constant expressions to access array elements.
75 * \note 'type' is the structure type holding eeprom layout
76 * and must be defined in user files.
78 #define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
81 bool eeprom_write(e2addr_t addr, const void *buf, size_t count);
82 bool eeprom_read(e2addr_t addr, void *buf, size_t count);
83 bool eeprom_write_char(e2addr_t addr, char c);
84 int eeprom_read_char(e2addr_t addr);
85 void eeprom_erase(e2addr_t addr, size_t count);
86 void eeprom_init(void);
87 void eeprom_test(void);
89 #endif /* DRV_EEPROM_H */