100 lines
3.7 KiB
ReStructuredText
100 lines
3.7 KiB
ReStructuredText
.. _zbus-uart-bridge-sample:
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UART bridge sample
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##################
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Overview
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********
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This simple application demonstrates a UART redirection of all channel events to the host.
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The device sends information to the script running on a computer host. The script decodes it and prints it to the stdout.
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Building and Running
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********************
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This project outputs to the console. It can be built and executed
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on native_posix as follows:
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.. zephyr-app-commands::
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:zephyr-app: samples/subsys/zbus/uart_bridge
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:host-os: unix
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:board: native_posix
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:goals: run
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Sample Output
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=============
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.. code-block:: console
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[0/1] cd .../zephyr/build/zephyr/zephyr.exe
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uart_1 connected to pseudotty: /dev/pts/2
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uart connected to pseudotty: /dev/pts/3
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*** Booting Zephyr OS build zephyr-v3.1.0 ***
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D: Core sending start measurement with status 0
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D: START processing channel start_measurement change
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D: FINISH processing channel start_measurement change
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D: Peripheral sending sensor data
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D: START processing channel sensor_data change
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D: FINISH processing channel sensor_data change
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D: Bridge Started
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D: Channel start_measurement claimed
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D: Channel start_measurement finished
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D: Bridge send start_measurement
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D: Channel sensor_data claimed
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D: Channel sensor_data finished
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D: Bridge send sensor_data
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D: Core sending start measurement with status 1
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D: START processing channel start_measurement change
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D: FINISH processing channel start_measurement change
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D: Channel start_measurement claimed
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D: Channel start_measurement finished
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D: Bridge send start_measurement
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D: Peripheral sending sensor data
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D: START processing channel sensor_data change
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D: FINISH processing channel sensor_data change
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D: Channel sensor_data claimed
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D: Channel sensor_data finished
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D: Bridge send sensor_data
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<repeats endlessly>
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Exit execution by pressing :kbd:`CTRL+C`.
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The :file:`decoder.py` script can be executed using the following command:
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.. code-block:: bash
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python3.8 samples/subsys/zbus/uart_bridge/decoder.py /dev/pts/2
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Note the run command above prints the value of pts port because it is running in ``native_posix``. Look at the line indicating ``uart_1 connected to pseudotty: /dev/pts/2``. It can be different in your case. If you are using a board, read the documentation to get the correct port destination (in Linux is something like ``/dev/tty...`` or in Windows ``COM...``).
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From the serial decoder (Python script), you would see something like this:
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.. code-block:: shell
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PUB [sensor_data] -> b'\xc5\x01\x00\x00\xb2\x11\x00\x00'
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PUB [start_measurement] -> b'\x00'
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PUB [sensor_data] -> b'\xc6\x01\x00\x00\xbc\x11\x00\x00'
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PUB [start_measurement] -> b'\x01'
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PUB [sensor_data] -> b'\xc7\x01\x00\x00\xc6\x11\x00\x00'
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PUB [start_measurement] -> b'\x00'
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PUB [sensor_data] -> b'\xc8\x01\x00\x00\xd0\x11\x00\x00'
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PUB [start_measurement] -> b'\x01'
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PUB [sensor_data] -> b'\xc9\x01\x00\x00\xda\x11\x00\x00'
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PUB [start_measurement] -> b'\x00'
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PUB [sensor_data] -> b'\xca\x01\x00\x00\xe4\x11\x00\x00'
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PUB [start_measurement] -> b'\x01'
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PUB [sensor_data] -> b'\xcb\x01\x00\x00\xee\x11\x00\x00'
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PUB [start_measurement] -> b'\x00'
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PUB [sensor_data] -> b'\xcc\x01\x00\x00\xf8\x11\x00\x00'
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PUB [start_measurement] -> b'\x01'
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PUB [sensor_data] -> b'\xcd\x01\x00\x00\x02\x12\x00\x00'
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PUB [start_measurement] -> b'\x00'
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PUB [sensor_data] -> b'\xce\x01\x00\x00\x0c\x12\x00\x00'
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PUB [start_measurement] -> b'\x01'
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PUB [sensor_data] -> b'\xcf\x01\x00\x00\x16\x12\x00\x00'
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PUB [start_measurement] -> b'\x00'
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Exit the decoder script by pressing :kbd:`CTRL+C`.
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