1.. zephyr:code-sample:: accel_trig
2 :name: Accelerometer trigger
3
4 Test and debug accelerometer with interrupts.
5
6Overview
7********
8
9This sample application demonstrates how to use 3-Axis accelerometers with triggers.
10By default it uses a data ready trigger to read the accelerometer data and print it to the console.
11
12If the accelerometer is enabled with a tap trigger, the sample uses the tap trigger event to
13read the accelerometer data and print it to the console.
14
15Building and Running
16********************
17
18.. code-block:: devicetree
19
20 / {
21 aliases {
22 accel0 = &fxos8700;
23 };
24 };
25
26Make sure the aliases are in devicetree, then build and run with:
27
28.. zephyr-app-commands::
29 :zephyr-app: samples/sensor/accel_trig
30 :board: <board to use>
31 :goals: build flash
32 :compact:
33
34With this example, you can also detect a double tap with an accelerometer by activating the
35:kconfig:option:`CONFIG_SAMPLE_TAP_DETECTION`.
36In this example we use a x_nucleo_iks01a3 shield with a LIS2DW12 accelerometer.
37You can build it with the following command:
38
39.. zephyr-app-commands::
40 :zephyr-app: samples/sensor/accel_trig
41 :board: nrf52dk/nrf52832
42 :shield: x_nucleo_iks01a3
43 :goals: build
44 :west-args: --extra-dtc-overlay x_nucleo_iks01a3.overlay
45 :compact:
46
47
48Sample Output (SENSOR_TRIG_DATA_READY)
49=======================================
50
51.. code-block:: console
52
53 fxos8700@1d [m/s^2]: ( -0.153229, -0.057461, 9.931148)
54 fxos8700@1d [m/s^2]: ( -0.153229, -0.057461, 9.931148)
55 fxos8700@1d [m/s^2]: ( -0.143653, -0.057461, 9.921571)
56 fxos8700@1d [m/s^2]: ( -0.153229, -0.067038, 9.931148)
57 fxos8700@1d [m/s^2]: ( -0.143653, -0.067038, 9.921571)
58 fxos8700@1d [m/s^2]: ( -0.134076, -0.047885, 9.931148)
59 fxos8700@1d [m/s^2]: ( -0.105345, -0.038308, 9.940725)
60 fxos8700@1d [m/s^2]: ( -0.105345, -0.019154, 9.931148)
61 fxos8700@1d [m/s^2]: ( -0.105345, -0.028731, 9.921571)
62 fxos8700@1d [m/s^2]: ( -0.095769, -0.028731, 9.931148)
63 fxos8700@1d [m/s^2]: ( -0.095769, -0.009577, 9.940725)
64
65
66Sample Output (SENSOR_TRIG_DOUBLE_TAP)
67======================================
68
69.. code-block:: console
70
71 TAP detected
72 lis2dw12@19 [m/s^2]: ( -1.899901, -12.550355, -2.742174)
73 TAP detected
74 lis2dw12@19 [m/s^2]: ( 12.349357, -18.125630, 6.015556)
75 TAP detected
76 lis2dw12@19 [m/s^2]: ( -11.385050, -7.274181, -9.229117)
77 TAP detected
78 lis2dw12@19 [m/s^2]: ( 9.214760, -9.286545, 2.311466)
79 TAP detected
80 lis2dw12@19 [m/s^2]: ( 10.090533, -17.391034, 12.320643)
81 TAP detected
82 lis2dw12@19 [m/s^2]: ( -0.478564, 2.390429, 15.876378)
83 TAP detected
84 lis2dw12@19 [m/s^2]: ( -5.668596, -13.138989, 0.741775)
85 TAP detected
86 lis2dw12@19 [m/s^2]: ( -2.385644, -10.559526, 9.899107)
87 TAP detected
88 lis2dw12@19 [m/s^2]: ( 7.537391, -8.551948, 16.740187)
89