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407b49b35c
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>
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| .. | ||
| boards | ||
| src | ||
| CMakeLists.txt | ||
| prj.conf | ||
| README.rst | ||
| sample.yaml | ||
.. _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