Custom Boards How-To

As explained in Configuring, supported boards (also known as “in-tree” boards) are configured using a standard syntax:

$ cd nuttx
$ ./tools/configure.sh -l board-name:config-name
  Copy files
  Select CONFIG_HOST_LINUX=y
  Refreshing...

Sometimes it is not appropriate, or not wanted, to add a new or custom board to the NuttX boards tree itself. If so, the board can be defined out-of-tree in a custom directory and still be built easily.

Add a Custom Board

The same set of files as provided for in-tree boards is required (i.e. configs, Kconfig, scripts, etc.) but these can be placed in a directory of your choice.

In this example, the files are assumed to exist in:

../nuttx/CustomBoards/MyCustomBoardName

$pwd
/home/nuttx/nuttx
$ ls -1 ../CustomBoards/MyCustomBoardName
configs
helpers
include
Kconfig
scripts
$ ls ../CustomBoards/MyCustomBoardName/configs
nsh
MyCustomConfig
$

To build the custom board, the syntax is slightly different to in-tree boards and configs:

$ .tools/configure -l ../CustomBoards/MyCustomBoardName/configs/MyCustomConfig
Copy files
Select CONFIG_HOST_LINUX=y
Refreshing...

Kconfig Settings

Once the board is configured, to ensure subsequent builds run correctly, there are two Kconfig settings that need to be set. These are:

Board Selection ‣ Custom Board Configuration ‣ Custom Board Name

Board Selection ‣ Custom Board Configuration ‣ Relative custom board directory

They should be set to suit your board name and directory location.

Note

If you subsequently run a make distclean operation, then these settings will be lost. They should be added back before building, and/or before running make menuconfig.