:orphan:

.. title:: LOG_BACKEND_RTT

.. option:: CONFIG_LOG_BACKEND_RTT

*Enable Segger J-Link RTT backend*

Type: ``bool``

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.

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

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

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

Default
=======

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

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

.. highlight:: kconfig

At ``subsys/logging/Kconfig.backends:51``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``subsys/Kconfig:31`` → ``subsys/logging/Kconfig:25``

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

.. parsed-literal::

    config LOG_BACKEND_RTT
    	bool "Enable Segger J-Link RTT backend"
    	default y if !\ :option:`SHELL_BACKEND_RTT <CONFIG_SHELL_BACKEND_RTT>`
    	depends on \ :option:`USE_SEGGER_RTT <CONFIG_USE_SEGGER_RTT>` && !\ :option:`LOG_FRONTEND <CONFIG_LOG_FRONTEND>` && !\ :option:`LOG_MINIMAL <CONFIG_LOG_MINIMAL>` && \ :option:`LOG <CONFIG_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.)*