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/****************************************************************************
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
* Author: Lorenz Meier <lm@inf.ethz.ch>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file eeprom.c
*
* EEPROM service and utility app.
*/
#include <nuttx/config.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <sys/mount.h>
#include <nuttx/i2c.h>
#include <nuttx/mtd.h>
#include <nuttx/fs/nxffs.h>
#include <arch/board/board.h>
#include "systemlib/systemlib.h"
#include "systemlib/err.h"
#ifndef PX4_I2C_BUS_ONBOARD
# error PX4_I2C_BUS_ONBOARD not defined, cannot locate onboard EEPROM
#endif
#if !defined(CONFIG_MTD_AT24XX) || !CONFIG_MTD_AT24XX
# error CONFIG_MTD_AT24XX not defined, no supported EEPROM available
#endif
__EXPORT int eeprom_main(int argc, char *argv[]);
static void eeprom_start(void);
int eeprom_main(int argc, char *argv[])
{
if (argc >= 2) {
if (!strcmp(argv[1], "start"))
eeprom_start();
}
errx(1, "expected a command, try 'start'");
}
static void
eeprom_start(void)
{
static bool started = false;
int ret;
if (started)
errx(1, "EEPROM service already started");
/* find the right I2C */
struct i2c_s *i2c = up_i2cinitialize(PX4_I2C_BUS_ONBOARD);
if (i2c == NULL)
errx(1, "failed to locate I2C bus");
/* start the MTD driver */
struct mtd_dev_s *mtd = at24c_initialize(i2c);
if (mtd == NULL)
errx(1, "failed to initialize EEPROM driver");
/* start NXFFS */
ret = nxffs_initialize(mtd);
if (ret < 0)
err(1, "failed to initialize NXFFS");
/* mount the EEPROM */
ret = mount(NULL, "/eeprom", "nxffs", 0, NULL);
if (ret < 0)
err(1, "failed to mount EEPROM");
errx(0, "mounted EEPROM at /eeprom");
}
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