zephyr

History

Henrik Brix Andersen c894a6db4d drivers: counter: add counter_get_value(), deprecate counter_read() Introduce a new counter API function for reading the current counter value (counter_get_value()) and deprecate the former counter_read() in favor of this. Update all drivers and calling code to match the new counter API. The previous counter driver API function for reading the current value of the counter (counter_read()) did not support indicating whether the read suceeded. This is fine for counters internal to the SoC where the read always succeeds but insufficient for external counters (e.g. I2C or SPI slaves). Fixes #21846. Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>		2020-01-28 12:52:46 -05:00
..
src	drivers: counter: add counter_get_value(), deprecate counter_read()	2020-01-28 12:52:46 -05:00
CMakeLists.txt	…
Kconfig	kconfig: Clean up header comments and make them consistent	2019-11-04 17:31:27 -05:00
README.rst	…
prj.conf	…
sample.yaml	tests: fix test identifiers	2019-12-09 15:53:44 -05:00

README.rst

.. _alarm_sample:

Counter Alarm Sample
#####################

Overview
********
This sample provides an example of alarm application using counter API.
It sets an alarm with an initial delay of 2 seconds. At each alarm
expiry, a new alarm is configured with a delay multiplied by 2.

Requirements
************

This sample requires the support of a timer IP compatible with alarm setting.

References
**********

- :ref:`disco_l475_iot1_board`

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

 .. zephyr-app-commands::
    :zephyr-app: samples/drivers/counter/alarm
    :host-os: unix
    :board: disco_l475_iot1
    :goals: run
    :compact:

Sample Output
=============

 .. code-block:: console

    Counter alarm sample

    Set alarm in 2 sec
    !!! Alarm !!!
    Now: 2
    Set alarm in 4 sec
    !!! Alarm !!!
    Now: 6
    Set alarm in 8 sec
    !!! Alarm !!!
    Now: 14
    Set alarm in 16 sec
    !!! Alarm !!!
    Now: 30

    <repeats endlessly>