Hand over control of the onboard EEPROM to the NuttX I2C EEPROM driver and NXFFS.

apps/systemcmds/eeprom/Makefile

@@ -0,0 +1,42 @@
+############################################################################
+#
+#   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+#
+# 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.
+#
+############################################################################
+
+#
+# Build the eeprom tool.
+#
+
+APPNAME		 = eeprom
+PRIORITY	 = SCHED_PRIORITY_DEFAULT
+STACKSIZE	 = 2048
+
+include $(APPDIR)/mk/app.mk

apps/systemcmds/eeprom/eeprom.c

@@ -0,0 +1,111 @@
+/****************************************************************************
+ *
+ *   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");
+}

nuttx/configs/px4fmu/nsh/appconfig

@@ -50,6 +50,7 @@ CONFIGURED_APPS += systemcmds/perf
 CONFIGURED_APPS += systemcmds/top
 CONFIGURED_APPS += systemcmds/boardinfo
 CONFIGURED_APPS += systemcmds/mixer
+CONFIGURED_APPS += systemcmds/eeprom
 #CONFIGURED_APPS += systemcmds/calibration
 
 # Tutorial code from

nuttx/configs/px4fmu/nsh/defconfig

@@ -246,6 +246,14 @@ CONFIG_STM32_I2CTIMEOUS_PER_BYTE=200
 CONFIG_STM32_I2CTIMEOUS_START_STOP=700
 CONFIG_DEBUG_I2C=n
 
+#
+# Enable the MTD driver for the onboard I2C EEPROM
+#
+CONFIG_MTD_AT24XX=y
+CONFIG_AT24XX_ADDR=0x50
+CONFIG_AT24XX_SIZE=128
+CONFIG_AT24XX_MTD_BLOCKSIZE=256
+
 #
 # STM32F40xxx specific serial device driver settings
 #
@@ -699,7 +707,10 @@ CONFIG_FS_FAT=y
 CONFIG_FAT_LCNAMES=y
 CONFIG_FAT_LFN=y
 CONFIG_FAT_MAXFNAME=32
-CONFIG_FS_NXFFS=n
+CONFIG_FS_NXFFS=y
+CONFIG_NXFFS_MAXNAMLEN=32
+CONFIG_NXFFS_TAILTHRESHOLD=2048
+CONFIG_NXFFS_PREALLOCATED=y
 CONFIG_FS_ROMFS=y
 
 #