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zephyr/samples/sensor/adt7420/README.rst

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samples: sensor: adt7420: Add ADT7420 sample application This simple application periodically prints the ambient temperature. Optional support for threshold triggers is provided. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
2018-07-12 15:17:23 +08:00
.. _adt7420:
ADT7420: High accuracy digital I2C temperature sensor
#####################################################
Description
***********
This sample application periodically (1Hz) measures the ambient temperature
in degrees Celsius. The result is written to the console.
samples: sensor: adt7420: rework for trigger testing When a trigger was enabled the original implementation would do nothing more than print "Waiting for a threshold event", without describing what such an event would look like. Rework to maintain a window of +/- 0.5 Cel around the most recent in-window temperature, and reset that window whenever a trigger occurs or a non-trigger reading is outside the window. Time-out and display the temperature if no event occurs in a reasonable time. Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
2019-12-21 23:26:36 +08:00
When configured in trigger mode the update interval is 5 s, and the
sample maintains a |plusminus| 1 |deg| C window around a recent
temperature. As soon as the temperature goes outside the window an
interrupt causes the application to display an event and update the
upper and lower window boundaries.
samples: sensor: adt7420: Add ADT7420 sample application This simple application periodically prints the ambient temperature. Optional support for threshold triggers is provided. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
2018-07-12 15:17:23 +08:00
References
**********
- ADT7420: http://www.analog.com/adt7420
Wiring
*******
This sample uses the ADT7420 sensor controlled using the I2C interface.
Connect Supply: **VDD**, **GND** and Interface: **SDA**, **SCL**
and optionally connect the **INT** to a interrupt capable GPIO.
The supply voltage can be in the 2.7V to 5.5V range.
Depending on the baseboard used, the **SDA** and **SCL** lines require Pull-Up
resistors.
Building and Running
********************
This project outputs sensor data to the console. It requires an ADT7420
sensor. It should work with any platform featuring a I2C peripheral interface.
It does not work on QEMU.
boards: nrf52_pca10040: Rename to nrf52dk_nrf52832 The board name for the nRF52 DK, so far known as nrf52_pca10040, is renamed to nrf52dk_nrf52832. Its documentation and all references to its name in the tree are updated accordingly. Overlay and configuration files specific to this board are also renamed, to match the new board name. Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
2020-04-03 00:24:56 +08:00
In this example below the :ref:`nrf52dk_nrf52832` board is used.
samples: sensor: adt7420: Add ADT7420 sample application This simple application periodically prints the ambient temperature. Optional support for threshold triggers is provided. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
2018-07-12 15:17:23 +08:00
.. zephyr-app-commands::
doc: fix broken file and zephyr-app refs found some references to files (via :zephyr_file: and :zephyr-app:) that were moved, so the links were broken Fixes: #19660 Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
2019-10-08 01:12:11 +08:00
:zephyr-app: samples/sensor/adt7420
boards: nrf52_pca10040: Rename to nrf52dk_nrf52832 The board name for the nRF52 DK, so far known as nrf52_pca10040, is renamed to nrf52dk_nrf52832. Its documentation and all references to its name in the tree are updated accordingly. Overlay and configuration files specific to this board are also renamed, to match the new board name. Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
2020-04-03 00:24:56 +08:00
:board: nrf52dk_nrf52832
samples: sensor: adt7420: Add ADT7420 sample application This simple application periodically prints the ambient temperature. Optional support for threshold triggers is provided. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
2018-07-12 15:17:23 +08:00
:goals: build flash
Sample Output
=============
.. code-block:: console
samples: sensor: adt7420: rework for trigger testing When a trigger was enabled the original implementation would do nothing more than print "Waiting for a threshold event", without describing what such an event would look like. Rework to maintain a window of +/- 0.5 Cel around the most recent in-window temperature, and reset that window whenever a trigger occurs or a non-trigger reading is outside the window. Time-out and display the temperature if no event occurs in a reasonable time. Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
2019-12-21 23:26:36 +08:00
*** Booting Zephyr OS build zephyr-v2.1.0-538-g12b2ed2cf7c3 ***
device is 0x2000101c, name is ADT7420
[0:00:00.011]: temperature 21.203125 Cel
[0:00:01.015]: temperature 21.171875 Cel
[0:00:02.019]: temperature 21.171875 Cel
[0:00:03.023]: temperature 21.187500 Cel
[0:00:04.027]: temperature 21.140625 Cel
samples: sensor: adt7420: Add ADT7420 sample application This simple application periodically prints the ambient temperature. Optional support for threshold triggers is provided. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
2018-07-12 15:17:23 +08:00
<repeats endlessly>