: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 <CONFIG_LOG>`

*(Includes any dependencies from if's and menus.)*

Defaults
========

- "y" if !\ :option:`SHELL_BACKEND_RTT <CONFIG_SHELL_BACKEND_RTT>` && \ :option:`USE_SEGGER_RTT <CONFIG_USE_SEGGER_RTT>` && \ :option:`LOG <CONFIG_LOG>`

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

.. highlight:: kconfig

At ``subsys/logging/Kconfig:241``

Included via ``Kconfig:10`` → ``Kconfig.zephyr:39`` → ``subsys/Kconfig:20``

Menu path: (top menu) → Logging

.. parsed-literal::

    config LOG_BACKEND_RTT
    	bool
    	prompt "Enable Segger J-Link RTT backend" if \ :option:`USE_SEGGER_RTT <CONFIG_USE_SEGGER_RTT>` && \ :option:`LOG <CONFIG_LOG>`
    	default "y" if !\ :option:`SHELL_BACKEND_RTT <CONFIG_SHELL_BACKEND_RTT>` && \ :option:`USE_SEGGER_RTT <CONFIG_USE_SEGGER_RTT>` && \ :option:`LOG <CONFIG_LOG>`
    	depends on \ :option:`USE_SEGGER_RTT <CONFIG_USE_SEGGER_RTT>` && \ :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.

*(Definitions include propagated dependencies, including from if's and menus.)*