.. _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 an Arduino 101 board via I2C.
Sensor has multiple pins so you need to connect according to connection diagram given in
`bmm150 datasheet`_ at page 41.
There are two processor cores (x86 and ARC) on the Arduino 101. You will need to
flash both this sample's code on the ARC core (using the ``arduino101_ss`` board target),
and stub code on the x86 core (using the ``arduino_101`` board target), as shown below.
.. code-block:: console
$ cd $ZEPHYR_BASE/samples/sensor/bmm150
$ make BOARD=arduino_101_sss flash
$ cd $ZEPHYR_BASE/tests/booting/stub
$ make BOARD=arduino_101 flash
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 ttyUSB0
.. code-block:: console
$ sudo picocom -D /dev/ttyUSB0
.. 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
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