nuttx-apps/system/cfgdata/Make.defs
Ken Pettit 88c78b6a0c apps/system/configdata: Adds an "cfgdata" command which allows manipulation of the /dev/config items via the command line. One such use for this utility would be to set a "macaddr" configdata item, etc. The utility is sort-of like a u-boot env variable edit function:
For instance, to set a "macaddr" when the new CONFIG_MTD_CONFIG_NAMED option is selected, you would do:

nsh> cfgdata set macaddr [0xfc 0x01 0x0b 0x45 0xa1 0x12] <-- brackets denotes an array of bytes
nsh> cfgdata set hostname myboard

or using the old ID,INSTANCE numeric method:

nsh> cfgdata set 0,0 [0xfc 0x01 0x0b 0x45 0xa1 0x12]      <-- brackets denotes an array of bytes
nsh> cfgdata set 1,0 myboard

You can also display all config items:

nsh> cfgdata print all
Name                    Len   Data
macaddr                 6     0xFC 0x01 0x0B 0x45 0xA1 0x12
hostname                8     myboard
2018-12-20 14:24:51 -06:00

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############################################################################
# apps/system/cfgdata/Make.defs
# Adds selected applications to apps/ build
#
# Copyright (C) 2018 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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 NuttX 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.
#
############################################################################
ifneq ($(CONFIG_SYSTEM_CFGDATA),)
CONFIGURED_APPS += system/cfgdata
endif