zephyr

History

Torsten Rasmussen 407b49b35c cmake: use find_package to locate Zephyr Using find_package to locate Zephyr. Old behavior was to use $ENV{ZEPHYR_BASE} for inclusion of boiler plate code. Whenever an automatic run of CMake happend by the build system / IDE then it was required that ZEPHYR_BASE was defined. Using ZEPHYR_BASE only to locate the Zephyr package allows CMake to cache the base variable and thus allowing subsequent invocation even if ZEPHYR_BASE is not set in the environment. It also removes the risk of strange build results if a user switchs between different Zephyr based project folders and forgetting to reset ZEPHYR_BASE before running ninja / make. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>		2020-03-27 16:23:46 +01:00
..
boards	sensor: bmm150: Convert to DTS	2019-11-08 07:44:54 -06:00
src	…
CMakeLists.txt	cmake: use find_package to locate Zephyr	2020-03-27 16:23:46 +01:00
README.rst	boards: nrf52840_pca10056: Rename board to nrf52840dk_nrf52840	2020-03-27 09:14:08 +01:00
prj.conf	…
sample.yaml	sensor: bmm150: Convert to DTS	2019-11-08 07:44:54 -06:00

README.rst

.. _bmm150:

BMM150 Geomagnetic Sensor
#########################

Overview
********

This sample application periodically reads magnetometer (X, Y, Z) data from
the first available device that implements SENSOR_CHAN_MAGN_* (predefined array
of device names). This sample checks the sensor in polling mode (without
interrupt trigger).

Building and Running
********************

This sample application uses an BMM150 sensor connected to a board via I2C.
Sensor has multiple pins so you need to connect according to connection diagram given in
`bmm150 datasheet`_ at page 41.

.. code-block:: console

.. zephyr-app-commands::
   :zephyr-app: samples/sensor/bmm150
   :board: nrf52840dk_nrf52840
   :goals: flash
   :compact:

Sample Output
=============
To check output of this sample , any serial console program can be used.
Here I am using picocom program to open output. Check which tty device it is.
In my case it is ttyACM0

.. code-block:: console

        $ sudo picocom -D /dev/ttyACM0

.. code-block:: console

        ( x y z ) = ( -0.390625  0.087500  -0.390625 )
        ( x y z ) = ( -0.275000  0.115625  -0.275000 )
        ( x y z ) = ( -0.281250  0.125000  -0.281250 )
        ( x y z ) = ( -0.287500  0.134375  -0.287500 )

.. _bmm150 datasheet: http://www.mouser.com/ds/2/783/BST-BMM150-DS001-01-786480.pdf