6560f57140
Reports generic barometric sensor interrupts * Data ready interrupt * Pressure threshold interrupt * Pressure changed interrupt Signed-off-by: Remi Buisson <remi.buisson@tdk.com>
74 lines
2.7 KiB
ReStructuredText
74 lines
2.7 KiB
ReStructuredText
.. zephyr:code-sample:: pressure_interrupt
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:name: Barometric pressure and temperature sensor interrupt example
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:relevant-api: sensor_interface
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Manage interrupts from a barometric pressure and temperature sensor.
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Overview
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********
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This sample application uses a pressure sensor interrupt line to:
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* Inform when a measure is available in the sensor FIFO.
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Temperature and pressure data are read and displayed in terminal.
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If floats are supported, estimated altitude is also displayed.
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* Inform when the pressure value crosses a specified threshold.
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Threshold corresponds to around a 50cm altitude increase.
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A message is displayed in the terminal.
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* Inform when the pressure value changed more than the specified
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value between two consecutive samples.
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Change value corresponds to a finger pressing the sensor.
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A message is displayed in the terminal.
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Wiring
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*******
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This sample uses an external breakout for the sensor. A devicetree
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overlay must be provided to identify the I2C/SPI bus and GPIO used to
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control the sensor.
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Building and Running
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********************
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This sample supports pressure sensor devices. Device needs
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to be aliased as ``pressure-sensor``. For example:
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.. code-block:: devicetree
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/ {
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aliases {
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pressure-sensor = &icp201xx;
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};
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};
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Make sure the aliases are in devicetree, then build and run with:
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.. zephyr-app-commands::
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:zephyr-app: samples/sensor/pressure_interrupt
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:board: nrf52dk/nrf52832
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:goals: build flash
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Sample Output
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=============
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.. code-block:: console
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## Default configuration
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[00:00:00.266,479] <inf> PRESS_INT_SAMPLE: Starting ICP201xx sample.
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[00:00:00.273,803] <inf> PRESS_INT_SAMPLE: temp 25.49 Cel, pressure 96.271438 kPa, altitude 447.208465 m
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[00:00:00.280,914] <inf> PRESS_INT_SAMPLE: temp 25.50 Cel, pressure 96.271331 kPa, altitude 447.234161 m
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[00:00:00.288,024] <inf> PRESS_INT_SAMPLE: temp 25.49 Cel, pressure 96.266685 kPa, altitude 447.636077 m
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[00:00:00.295,135] <inf> PRESS_INT_SAMPLE: temp 25.50 Cel, pressure 96.267951 kPa, altitude 447.537078 m
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[00:00:00.302,246] <inf> PRESS_INT_SAMPLE: temp 25.51 Cel, pressure 96.268577 kPa, altitude 447.488281 m
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[00:00:00.309,356] <inf> PRESS_INT_SAMPLE: temp 25.50 Cel, pressure 96.269340 kPa, altitude 447.414978 m
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[00:00:00.316,467] <inf> PRESS_INT_SAMPLE: temp 25.50 Cel, pressure 96.268562 kPa, altitude 447.473663 m
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[00:00:00.323,547] <inf> PRESS_INT_SAMPLE: temp 25.50 Cel, pressure 96.267341 kPa, altitude 447.596496 m
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<repeats endlessly>
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<when sensor is pressed>
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[00:00:09.819,061] <inf> PRESS_INT_SAMPLE: PRESSURE CHANGE INTERRUPT
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<when the sensor pressure crosses defined threhold>
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[00:00:09.859,039] <inf> PRESS_INT_SAMPLE: PRESSURE THRESHOLD INTERRUPT
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