blob: adfc89b274ecc0dc986127e380f7f547e82ee293 [file] [log] [blame]
# Copyright (c) 2021 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
config LOG_BACKEND_SWO
bool "Serial Wire Output (SWO) backend"
depends on HAS_SWO
select LOG_OUTPUT
help
When enabled, backend will use SWO for logging.
if LOG_BACKEND_SWO
config LOG_BACKEND_SWO_REF_FREQ_HZ
int "SWO reference clock frequency"
default $(dt_node_int_prop_int,$(dt_nodelabel_path,itm),swo-ref-frequency) if $(dt_nodelabel_enabled,itm)
default $(dt_node_int_prop_int,/cpus/cpu@0,clock-frequency) if $(dt_node_has_prop,/cpus/cpu@0,clock-frequency)
default 0
help
Set SWO reference frequency. In most cases it is equal to CPU
frequency.
config LOG_BACKEND_SWO_FREQ_HZ
int "Set SWO output frequency"
default 0
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.
backend = SWO
backend-str = swo
source "subsys/logging/Kconfig.template.log_format_config"
endif # LOG_BACKEND_SWO