:orphan:

.. title:: CONFIG_LOG_BACKEND_SWO_FREQ_HZ

.. kconfig:: CONFIG_LOG_BACKEND_SWO_FREQ_HZ

CONFIG_LOG_BACKEND_SWO_FREQ_HZ
##############################

*Set SWO output frequency*

Type: ``int``

Help
====

.. code-block:: none

    Set SWO output frequency. Value 0 will select maximum frequency
    supported by the given MCU. Not all debug probes support high
    frequency SWO operation. In this case the frequency has to be set
    manually.

    SWO value defined by this option will be configured at boot. Most SWO
    viewer programs will configure SWO frequency when attached to the
    debug probe. Such configuration will persist only until the device
    reset. To ensure flawless operation the frequency configured here and
    by the SWO viewer program has to match.

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

(\ :kconfig:`LOG_BACKEND_SWO <CONFIG_LOG_BACKEND_SWO>` && \ :kconfig:`BOARD_EFM32GG_SLWSTK6121A <CONFIG_BOARD_EFM32GG_SLWSTK6121A>`) || (\ :kconfig:`LOG_BACKEND_SWO <CONFIG_LOG_BACKEND_SWO>` && \ :kconfig:`BOARD_EFM32GG_STK3701A <CONFIG_BOARD_EFM32GG_STK3701A>`) || (\ :kconfig:`LOG_BACKEND_SWO <CONFIG_LOG_BACKEND_SWO>` && \ :kconfig:`BOARD_EFR32_RADIO <CONFIG_BOARD_EFR32_RADIO>`) || (\ :kconfig:`LOG_BACKEND_SWO <CONFIG_LOG_BACKEND_SWO>` && !\ :kconfig:`LOG_FRONTEND <CONFIG_LOG_FRONTEND>` && !\ :kconfig:`LOG_MINIMAL <CONFIG_LOG_MINIMAL>` && \ :kconfig:`LOG <CONFIG_LOG>`)

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

Defaults
========

- 875000
- 875000
- 875000
- 0

Kconfig definitions
===================



At ``<Zephyr Boards>/arm/efm32gg_slwstk6121a/Kconfig.defconfig:29``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:22``

Menu path: (Top)

.. code-block:: kconfig

    config LOG_BACKEND_SWO_FREQ_HZ
    	int
    	default 875000
    	depends on LOG_BACKEND_SWO && BOARD_EFM32GG_SLWSTK6121A

----

At ``<Zephyr Boards>/arm/efm32gg_stk3701a/Kconfig.defconfig:25``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:22``

Menu path: (Top)

.. code-block:: kconfig

    config LOG_BACKEND_SWO_FREQ_HZ
    	int
    	default 875000
    	depends on LOG_BACKEND_SWO && BOARD_EFM32GG_STK3701A

----

At ``<Zephyr Boards>/arm/efr32_radio/Kconfig.defconfig:21``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:22``

Menu path: (Top)

.. code-block:: kconfig

    config LOG_BACKEND_SWO_FREQ_HZ
    	int
    	default 875000
    	depends on LOG_BACKEND_SWO && BOARD_EFR32_RADIO

----

At ``<Zephyr Subsystem>/logging/Kconfig.backends:64``

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 → Enable Serial Wire Output (SWO) backend

.. code-block:: kconfig

    config LOG_BACKEND_SWO_FREQ_HZ
    	int "Set SWO output frequency"
    	default 0
    	depends on LOG_BACKEND_SWO && !LOG_FRONTEND && !LOG_MINIMAL && LOG
    	help
    	  Set SWO output frequency. Value 0 will select maximum frequency
    	  supported by the given MCU. Not all debug probes support high
    	  frequency SWO operation. In this case the frequency has to be set
    	  manually.
	  
    	  SWO value defined by this option will be configured at boot. Most SWO
    	  viewer programs will configure SWO frequency when attached to the
    	  debug probe. Such configuration will persist only until the device
    	  reset. To ensure flawless operation the frequency configured here and
    	  by the SWO viewer program has to match.

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