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Kumar Gala a1b77fd589 zephyr: replace zephyr integer types with C99 types git grep -l 'u\(8\\|16\\|32\\|64\)_t' \| \ xargs sed -i "s/u\(8\\|16\\|32\\|64\)_t/uint\1_t/g" git grep -l 's\(8\\|16\\|32\\|64\)_t' \| \ xargs sed -i "s/s\(8\\|16\\|32\\|64\)_t/int\1_t/g" Signed-off-by: Kumar Gala <kumar.gala@linaro.org>		2020-06-08 08:23:57 -05:00
..
boards	boards: nrf52_pca10040: Rename to nrf52dk_nrf52832	2020-04-06 13:09:07 +02:00
src	zephyr: replace zephyr integer types with C99 types	2020-06-08 08:23:57 -05:00
CMakeLists.txt	samples: make find_package(Zephyr...) REQUIRED	2020-05-29 10:47:25 +02:00
README.rst	boards: nrf52_pca10040: Rename to nrf52dk_nrf52832	2020-04-06 13:09:07 +02:00
prj.conf	…
sample.yaml	samples: add test identifier	2019-03-29 17:44:11 -04:00

README.rst

.. _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.

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.

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.
In this example below the :ref:`nrf52dk_nrf52832` board is used.


.. zephyr-app-commands::
   :zephyr-app: samples/sensor/adt7420
   :board: nrf52dk_nrf52832
   :goals: build flash

Sample Output
=============

.. code-block:: console

   *** 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

<repeats endlessly>