MicroAPRS/bertos/drv/eeprom.h

178 lines
4.9 KiB
C
Raw Normal View History

2014-04-03 14:21:37 -06:00
/**
* \file
* <!--
* This file is part of BeRTOS.
*
* Bertos 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As a special exception, you may use this file as part of a free software
* library without restriction. Specifically, if other files instantiate
* templates or use macros or inline functions from this file, or you compile
* this file and link it with other files to produce an executable, this
* file does not by itself cause the resulting executable to be covered by
* the GNU General Public License. This exception does not however
* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
* Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
* All Rights Reserved.
* -->
*
* \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS.
*
* \author Stefano Fedrigo <aleph@develer.com>
* \author Bernie Innocenti <bernie@codewiz.org>
*
* $WIZ$ module_name = "eeprom"
* $WIZ$ module_configuration = "bertos/cfg/cfg_eeprom.h"
* $WIZ$ module_depends = "kfile", "kfile_block", "kblock", "i2c"
*/
#ifndef DRV_EEPROM_H
#define DRV_EEPROM_H
#include "cfg/cfg_eeprom.h"
#include <cfg/compiler.h>
#include <cfg/debug.h>
#include <drv/i2c.h>
#include <io/kblock.h>
#include <io/kfile.h>
#include <io/kfile_block.h>
#include <cpu/attr.h>
#if COMPILER_C99
#define eeprom_init(...) PP_CAT(eeprom_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
#define eeprom_verify(...) PP_CAT(eeprom_verify ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
#else
#define eeprom_init(args...) PP_CAT(eeprom_init ## _, COUNT_PARMS(args)) (args)
#define eeprom_verify(args...) PP_CAT(eeprom_verify ## _, COUNT_PARMS(args)) (args)
#endif
/**
* Values for Eeprom types.
*/
typedef enum EepromType
{
EEPROM_24XX08,
EEPROM_24XX16,
EEPROM_24XX256,
EEPROM_24XX512,
EEPROM_24XX1024,
EEPROM_CNT,
} EepromType;
/**
* On the same I2C bus can live more than one EEPROM
* device. Each device can be addressed by one or more
* pins.
*/
typedef uint8_t e2dev_addr_t;
/**
* Describe an EEPROM context, used by the driver to
* access the single device.
*/
typedef struct Eeprom
{
KBlock blk;
I2c *i2c;
EepromType type; ///< EEPROM type
e2dev_addr_t addr; ///< Device address.
bool verify;
#if !CONFIG_EEPROM_DISABLE_OLD_API
union {
KFile fd;
KFileBlock fdblk;
} DEPRECATED;
#endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
} Eeprom;
#if !CONFIG_EEPROM_DISABLE_OLD_API
STATIC_ASSERT(offsetof(Eeprom, fd) == offsetof(Eeprom, fdblk.fd));
#endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
/**
* ID for eeproms.
*/
#define KBT_EEPROM MAKE_ID('E', 'E', 'P', 'R')
/**
* Convert + ASSERT from generic KFile to Eeprom.
*/
INLINE Eeprom * EEPROM_CAST_KBLOCK(KBlock *blk)
{
ASSERT(blk->priv.type == KBT_EEPROM);
return (Eeprom *)blk;
}
/// Type for EEPROM addresses
typedef uint16_t e2addr_t;
/**
* Macro for E2Layout offset calculation
*
* \note We can't just use offsetof() here because we could use
* non-constant expressions to access array elements.
*
* \note 'type' is the structure type holding eeprom layout
* and must be defined in user files.
*/
#define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
/**
* Type for EEPROM block size.
*/
typedef uint16_t e2blk_size_t;
/**
* Type for accessing EEPROM whole size.
*/
typedef uint32_t e2_size_t;
/**
* Descrive all EEPROM informations
* needed by the driver.
*/
typedef struct EepromInfo
{
bool has_dev_addr; ///< true if memory is device addressable (its A0, A1, A2 pin are used by memory).
e2blk_size_t blk_size; ///< block size
e2_size_t e2_size; ///< eeprom size
} EepromInfo;
bool eeprom_erase(Eeprom *eep, e2addr_t addr, e2_size_t count);
bool eeprom_verify_4(Eeprom *eep, e2addr_t addr, const void *buf, size_t count);
void eeprom_init_5(Eeprom *eep, I2c *i2c, EepromType type, e2dev_addr_t addr, bool verify);
#if !CONFIG_EEPROM_DISABLE_OLD_API
DEPRECATED INLINE bool eeprom_verify_3(Eeprom *eep, const void *buf, size_t count)
{
return eeprom_verify_4(eep, (e2addr_t)eep->fdblk.fd.seek_pos, buf, count);
}
DEPRECATED INLINE void eeprom_init_4(Eeprom *eep, EepromType type, e2dev_addr_t addr, bool verify)
{
eeprom_init_5(eep, &local_i2c_old_api, type, addr, verify);
kfileblock_init(&eep->fdblk, &eep->blk);
}
#endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
#endif /* DRV_EEPROM_H */