| # 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 |
