128 lines
4.0 KiB
ReStructuredText
128 lines
4.0 KiB
ReStructuredText
.. include:: /substitutions.rst
|
|
.. _configuring:
|
|
|
|
Configuring
|
|
===========
|
|
|
|
Apache NuttX is a very configurable operating system. Nearly all features can be configured in or
|
|
out of the system. This makes it possible to compile a build tailored for your hardware and
|
|
application.
|
|
|
|
The Apache NuttX configuration system uses Linux's
|
|
`kconfig system <https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt>`_ which
|
|
includes various frontends that allow you to modify configuration easily. Usually, the ``menuconfig``
|
|
frontend is used, which is a console based menu system (more info `here <https://en.wikipedia.org/wiki/Menuconfig>`_).
|
|
|
|
As previously explained in :doc:`compiling`, the first step is to load a premade configuration for
|
|
your board. Then, you can modify this configuration to your liking.
|
|
|
|
In this example, we will show how you modify the default configuration of the ``sim`` build.
|
|
|
|
#. Initialize Board Configuration
|
|
|
|
.. code-block:: console
|
|
|
|
$ cd nuttx
|
|
$ ./tools/configure.sh -l sim:nsh
|
|
Copy files
|
|
Select CONFIG_HOST_LINUX=y
|
|
Refreshing...
|
|
|
|
#. Build & run
|
|
|
|
.. code-block:: console
|
|
|
|
$ make clean; make
|
|
$ ./nuttx
|
|
login:
|
|
|
|
From another terminal window, kill the simulator:
|
|
|
|
.. code-block:: console
|
|
|
|
$ pkill nuttx
|
|
|
|
#. Modify configuration
|
|
|
|
In this case we will remove the login feature (which will boot straight to the prompt). To
|
|
do so, we use the ``menuconfig`` frontend.
|
|
|
|
.. code-block:: console
|
|
|
|
$ make menuconfig
|
|
|
|
Here's what you should see:
|
|
|
|
.. image:: ../_static/images/menuconfig.png
|
|
:width: 800px
|
|
:align: center
|
|
:alt: Screenshot of menuconfig system main screen
|
|
|
|
|br|
|
|
|
|
The NSH Login setting is under :menuselection:`Application Configuration --> NSH Library`. You
|
|
can use :kbd:`🢁` and :kbd:`🢃` keys to navigate and :kbd:`↵` to enter a submenu.
|
|
To disable the corresponding setting go to :menuselection:`Console Login` and press :kbd:`spacebar` to
|
|
it (so that it has a blank space instead of a star in it).
|
|
|
|
Now you need to exit ``menuconfig`` and save the modified configuration. Use the :kbd:`🡸` and
|
|
:kbd:`🡺` arrow keys to navigate the lower menu. If you select :menuselection:`Exit` you will be
|
|
prompted to save the config.
|
|
|
|
#. Build with the new Configuration
|
|
|
|
.. code-block:: console
|
|
|
|
$ make
|
|
|
|
#. Run
|
|
|
|
.. code-block:: console
|
|
|
|
$ ./nuttx
|
|
NuttShell (NSH) NuttX-8.2
|
|
MOTD: username=admin password=Administrator
|
|
|
|
Success!
|
|
|
|
.. tip::
|
|
If you find that message of the day (MOTD) annoying and want to turn that off, it's
|
|
configured in :menuselection:`Application Configuration --> NSH Library --> Message of the Day (MOTD)`.
|
|
|
|
Fast configuration changes
|
|
--------------------------
|
|
|
|
If you know exactly which configuration symbol you want to change, you can use the ``kconfig-tweak`` tool (comes with the ``kconfig-frontends`` package) to quickly change a setting without going into the configuration frontend. This is useful to change settings such as debug options:
|
|
|
|
.. code-block:: console
|
|
|
|
$ kconfig-tweak --disable CONFIG_DEBUG_NET
|
|
$ make olddefconfig # needed to have the kconfig system check the config
|
|
$ kconfig-tweak --enable CONFIG_DEBUG_NET
|
|
$ make olddefconfig
|
|
|
|
This is also useful to script configuration changes that you perform often:
|
|
|
|
.. code-block:: console
|
|
|
|
#!/bin/bash
|
|
|
|
kconfig-tweak --disable CONFIG_DEBUG_ALERT
|
|
kconfig-tweak --disable CONFIG_DEBUG_FEATURES
|
|
kconfig-tweak --disable CONFIG_DEBUG_ERROR
|
|
kconfig-tweak --disable CONFIG_DEBUG_WARN
|
|
kconfig-tweak --disable CONFIG_DEBUG_INFO
|
|
kconfig-tweak --disable CONFIG_DEBUG_ASSERTIONS
|
|
kconfig-tweak --disable CONFIG_DEBUG_NET
|
|
kconfig-tweak --disable CONFIG_DEBUG_NET_ERROR
|
|
kconfig-tweak --disable CONFIG_DEBUG_NET_WARN
|
|
kconfig-tweak --disable CONFIG_DEBUG_NET_INFO
|
|
kconfig-tweak --disable CONFIG_DEBUG_SYMBOLS
|
|
kconfig-tweak --disable CONFIG_DEBUG_NOOPT
|
|
kconfig-tweak --disable CONFIG_SYSLOG_TIMESTAMP
|
|
make oldconfig
|
|
|
|
----
|
|
|
|
Next up is :ref:`debugging`.
|