:orphan:

.. title:: CONFIG_LOG_BACKEND_RTT

.. kconfig:: CONFIG_LOG_BACKEND_RTT

CONFIG_LOG_BACKEND_RTT
######################

*Enable Segger J-Link RTT backend*

Type: ``bool``

Help
====

.. code-block:: none

    When enabled, backend will use RTT for logging. This backend works on a per
    message basis. Only a whole message (terminated with a carriage return: '\r')
    is transferred to up-buffer at once depending on available space and
    selected mode.
    In panic mode backend always blocks and waits until there is space
    in up-buffer for a message and message is transferred to host.

Direct dependencies
===================

\ :kconfig:`USE_SEGGER_RTT <CONFIG_USE_SEGGER_RTT>` && !\ :kconfig:`LOG_FRONTEND <CONFIG_LOG_FRONTEND>` && !\ :kconfig:`LOG_MINIMAL <CONFIG_LOG_MINIMAL>` && \ :kconfig:`LOG <CONFIG_LOG>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y if !\ :kconfig:`SHELL_BACKEND_RTT <CONFIG_SHELL_BACKEND_RTT>`

Symbols selected by this symbol
===============================

- \ :kconfig:`SEGGER_RTT_CUSTOM_LOCKING <CONFIG_SEGGER_RTT_CUSTOM_LOCKING>`

Kconfig definition
==================



At ``<Zephyr Subsystem>/logging/Kconfig.backends:87``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:31`` → ``<Zephyr Subsystem>/logging/Kconfig:23``

Menu path: (Top) → Sub Systems and OS Services → Logging → Backends

.. code-block:: kconfig

    config LOG_BACKEND_RTT
    	bool "Enable Segger J-Link RTT backend"
    	default y if !SHELL_BACKEND_RTT
    	select SEGGER_RTT_CUSTOM_LOCKING
    	depends on USE_SEGGER_RTT && !LOG_FRONTEND && !LOG_MINIMAL && LOG
    	help
    	  When enabled, backend will use RTT for logging. This backend works on a per
    	  message basis. Only a whole message (terminated with a carriage return: '\r')
    	  is transferred to up-buffer at once depending on available space and
    	  selected mode.
    	  In panic mode backend always blocks and waits until there is space
    	  in up-buffer for a message and message is transferred to host.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*