8652e8e413
When CONFIG_LOG_OUTPUT is set, it indicates that logging strings are formatted by the application (using log_output module). It is not needed when backend works in the dictionary mode. So far LOG_OUTPUT was set also when dictionary mode was used and that prevented removing of the logging strings from binary which is an important feature of the dictionary logging. Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
59 lines
1.9 KiB
Text
59 lines
1.9 KiB
Text
# Copyright (c) 2021 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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config LOG_BACKEND_SWO
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bool "Serial Wire Output (SWO) backend"
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depends on HAS_SWO
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select LOG_BACKEND_SUPPORTS_FORMAT_TIMESTAMP
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help
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When enabled, backend will use SWO for logging.
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if LOG_BACKEND_SWO
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config LOG_BACKEND_SWO_REF_FREQ_HZ
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int "SWO reference clock frequency"
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default $(dt_node_int_prop_int,$(dt_nodelabel_path,itm),swo-ref-frequency) if $(dt_nodelabel_enabled,itm)
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default $(dt_node_int_prop_int,/cpus/cpu@0,clock-frequency) if $(dt_node_has_prop,/cpus/cpu@0,clock-frequency)
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default 0
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help
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Set SWO reference frequency. In most cases it is equal to CPU
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frequency.
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config LOG_BACKEND_SWO_FREQ_HZ
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int "Set SWO output frequency"
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default 0
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help
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Set SWO output frequency. Value 0 will select maximum frequency
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supported by the given MCU. Not all debug probes support high
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frequency SWO operation. In this case the frequency has to be set
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manually.
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SWO value defined by this option will be configured at boot. Most SWO
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viewer programs will configure SWO frequency when attached to the
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debug probe. Such configuration will persist only until the device
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reset. To ensure flawless operation the frequency configured here and
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by the SWO viewer program has to match.
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choice
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prompt "SWO protocol"
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default LOG_BACKEND_SWO_PROTOCOL_NRZ
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config LOG_BACKEND_SWO_PROTOCOL_NRZ
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bool "NRZ encoding"
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help
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Use UART-like NRZ encoding. This is the most common option, but requires the SWO output
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frequency to be known on the receiving side.
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config LOG_BACKEND_SWO_PROTOCOL_MANCHESTER
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bool "Manchester encoding"
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help
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Use Manchester encoding. This is less widely supported, but permits the clock to be
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recovered automatically on the receiving side.
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endchoice
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backend = SWO
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backend-str = swo
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source "subsys/logging/Kconfig.template.log_format_config"
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endif # LOG_BACKEND_SWO
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