2019-02-08 02:39:04 +08:00
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.. _alarm_sample:
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2018-11-30 17:17:22 +08:00
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2019-02-08 02:39:04 +08:00
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Counter Alarm Sample
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2018-11-30 17:17:22 +08:00
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#####################
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Overview
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********
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This sample provides an example of alarm application using counter API.
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It sets an alarm with an initial delay of 2 seconds. At each alarm
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expiry, a new alarm is configured with a delay multiplied by 2.
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Requirements
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************
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This sample requires the support of a timer IP compatible with alarm setting.
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References
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**********
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2019-02-08 02:39:04 +08:00
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- :ref:`disco_l475_iot1_board`
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2018-11-30 17:17:22 +08:00
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Building and Running
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********************
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.. zephyr-app-commands::
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2019-10-08 01:12:11 +08:00
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:zephyr-app: samples/drivers/counter/alarm
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2018-11-30 17:17:22 +08:00
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:host-os: unix
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:board: disco_l475_iot1
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:goals: run
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:compact:
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Sample Output
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=============
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.. code-block:: console
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Counter alarm sample
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Set alarm in 2 sec
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!!! Alarm !!!
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Now: 2
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Set alarm in 4 sec
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!!! Alarm !!!
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Now: 6
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Set alarm in 8 sec
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!!! Alarm !!!
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Now: 14
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Set alarm in 16 sec
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!!! Alarm !!!
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Now: 30
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<repeats endlessly>
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