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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.
35 * \author Stefano Fedrigo <aleph@develer.com>
36 * \author Bernie Innocenti <bernie@codewiz.org>
38 * $WIZ$ module_name = "eeprom"
39 * $WIZ$ module_configuration = "bertos/cfg/cfg_eeprom.h"
40 * $WIZ$ module_depends = "kfile", "kfile_block", "kblock", "i2c"
46 #include "cfg/cfg_eeprom.h"
48 #include <cfg/compiler.h>
49 #include <cfg/debug.h>
53 #include <io/kblock.h>
55 #include <io/kfile_block.h>
60 #define eeprom_init(...) PP_CAT(eeprom_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
61 #define eeprom_verify(...) PP_CAT(eeprom_verify ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
63 #define eeprom_init(args...) PP_CAT(eeprom_init ## _, COUNT_PARMS(args)) (args)
64 #define eeprom_verify(args...) PP_CAT(eeprom_verify ## _, COUNT_PARMS(args)) (args)
69 * Values for Eeprom types.
71 typedef enum EepromType
82 * On the same I2C bus can live more than one EEPROM
83 * device. Each device can be addressed by one or more
86 typedef uint8_t e2dev_addr_t;
89 * Describe an EEPROM context, used by the driver to
90 * access the single device.
96 EepromType type; ///< EEPROM type
97 e2dev_addr_t addr; ///< Device address.
99 #if !CONFIG_EEPROM_DISABLE_OLD_API
104 #endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
107 #if !CONFIG_EEPROM_DISABLE_OLD_API
108 STATIC_ASSERT(offsetof(Eeprom, fd) == offsetof(Eeprom, fdblk.fd));
109 #endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
114 #define KBT_EEPROM MAKE_ID('E', 'E', 'P', 'R')
117 * Convert + ASSERT from generic KFile to Eeprom.
119 INLINE Eeprom * EEPROM_CAST_KBLOCK(KBlock *blk)
121 ASSERT(blk->priv.type == KBT_EEPROM);
122 return (Eeprom *)blk;
125 /// Type for EEPROM addresses
126 typedef uint16_t e2addr_t;
129 * Macro for E2Layout offset calculation
131 * \note We can't just use offsetof() here because we could use
132 * non-constant expressions to access array elements.
134 * \note 'type' is the structure type holding eeprom layout
135 * and must be defined in user files.
137 #define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
140 * Type for EEPROM block size.
142 typedef uint16_t e2blk_size_t;
145 * Type for accessing EEPROM whole size.
147 typedef uint32_t e2_size_t;
150 * Descrive all EEPROM informations
151 * needed by the driver.
153 typedef struct EepromInfo
155 bool has_dev_addr; ///< true if memory is device addressable (its A0, A1, A2 pin are used by memory).
156 e2blk_size_t blk_size; ///< block size
157 e2_size_t e2_size; ///< eeprom size
160 bool eeprom_erase(Eeprom *eep, e2addr_t addr, e2_size_t count);
161 bool eeprom_verify_4(Eeprom *eep, e2addr_t addr, const void *buf, size_t count);
162 void eeprom_init_5(Eeprom *eep, I2c *i2c, EepromType type, e2dev_addr_t addr, bool verify);
164 #if !CONFIG_EEPROM_DISABLE_OLD_API
166 DEPRECATED INLINE bool eeprom_verify_3(Eeprom *eep, const void *buf, size_t count)
168 return eeprom_verify_4(eep, (e2addr_t)eep->fdblk.fd.seek_pos, buf, count);
170 DEPRECATED INLINE void eeprom_init_4(Eeprom *eep, EepromType type, e2dev_addr_t addr, bool verify)
172 eeprom_init_5(eep, &local_i2c_old_api, type, addr, verify);
173 kfileblock_init(&eep->fdblk, &eep->blk);
175 #endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
177 #endif /* DRV_EEPROM_H */