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zephyr/samples/subsys/logging/logger
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Sebastian Bøe 55ee53ce91 cmake: Prepend 'cmake_minimum_required()' into 'app' build scripts 
Prepend the text 'cmake_minimum_required(VERSION 3.8.2)' into the
application and test build scripts.

Modern versions of CMake will spam users with a deprecation warning
when the toplevel CMakeLists.txt does not specify a CMake
version. This is documented in bug #8355.

To resolve this we include a cmake_minimum_required() line into the
toplevel build scripts. Additionally, cmake_minimum_required is
invoked from within boilerplate.cmake. The highest version will be
enforced.

This patch allows us to afterwards change CMake policy CMP000 from OLD
to NEW which in turn finally rids us of the verbose warning.

The extra boilerplate is considered more acceptable than the verbosity
of the CMP0000 policy.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
2018-08-15 04:06:50 -07:00
..
src logging: Add metadata to hexdump 2018-08-14 07:14:34 -07:00
CMakeLists.txt cmake: Prepend 'cmake_minimum_required()' into 'app' build scripts 2018-08-15 04:06:50 -07:00
prj.conf logging: Internal processing thread enabled by default 2018-07-19 09:50:18 -04:00
README.rst samples: subsys: logging: Add logger example 2018-06-29 10:16:45 +02:00
sample.yaml samples: subsys: logging: Add logger example 2018-06-29 10:16:45 +02:00

README.rst 

.. _logger_sample:

Logging
###########

Overview
********
A simple application that demonstrates use of logging subsystem. It demonstrates
main features: severity levels, timestamping, module level filtering and
instance level filtering. It also showcases logging capabilities in terms of
performance.

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

This project outputs multiple log message to the console.  It can be built and
executed on QEMU as follows:

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/logging/logger
   :host-os: unix
   :board: qemu_x86
   :goals: run
   :compact:


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

.. code-block:: console

         Module logging showcase.
         [00:00:00.000,122] <info> foo: log in test_module 11
         Disabling logging in the foo module
         Function called again but with logging disabled.
         Instance level logging showcase.
         [00:00:00.000,274] <info> sample_instance.inst1: counter_value: 0
         [00:00:00.000,274] <warn> sample_instance.inst1: Example of hexdump:
         [00:00:00.000,305] <warn> sample_instance.inst1:  01 02 03 04            |....
         [00:00:00.000,305] <info> sample_instance.inst2: counter_value: 0
         [00:00:00.000,305] <warn> sample_instance.inst2: Example of hexdump:
         [00:00:00.000,305] <warn> sample_instance.inst2:  01 02 03 04            |....
         Changing filter to warning on sample_instance.inst1 instance.
         [00:00:00.000,396] <warn> sample_instance.inst1: Example of hexdump:
         [00:00:00.000,427] <warn> sample_instance.inst1:  01 02 03 04            |....
         [00:00:00.000,427] <info> sample_instance.inst2: counter_value: 1
         [00:00:00.000,427] <warn> sample_instance.inst2: Example of hexdump:
         [00:00:00.000,427] <warn> sample_instance.inst2:  01 02 03 04            |....
         Disabling logging on both instances.
         Function call on both instances with logging disabled.
         Severity levels showcase.
         [00:00:00.000,610] <err> main: Error message example.
         [00:00:00.000,610] <warn> main: Warning message example.
         [00:00:00.000,610] <info> main: Info message example.
         Logging performance showcase.
         [00:00:00.134,887] <info> main: performance test - log message 0
         [00:00:00.134,887] <info> main: performance test - log message 1
         [00:00:00.134,887] <info> main: performance test - log message 2
         [00:00:00.134,887] <info> main: performance test - log message 3
         [00:00:00.134,887] <info> main: performance test - log message 4
         [00:00:00.134,887] <info> main: performance test - log message 5
         [00:00:00.134,887] <info> main: performance test - log message 6
         [00:00:00.134,918] <info> main: performance test - log message 7
         [00:00:00.134,918] <info> main: performance test - log message 8
         [00:00:00.134,918] <info> main: performance test - log message 9
         [00:00:00.134,918] <info> main: performance test - log message 10
         [00:00:00.134,918] <info> main: performance test - log message 11
         [00:00:00.134,918] <info> main: performance test - log message 12
         [00:00:00.134,918] <info> main: performance test - log message 13
         [00:00:00.134,948] <info> main: performance test - log message 14
         Estimated logging capabilities: 245760 messages/second