zephyr/samples/boards/google_kukui
Keith Packard 0b90fd5adf samples, tests, boards: Switch main return type from void to int
As both C and C++ standards require applications running under an OS to
return 'int', adapt that for Zephyr to align with those standard. This also
eliminates errors when building with clang when not using -ffreestanding,
and reduces the need for compiler flags to silence warnings for both clang
and gcc.

Most of these changes were automated using coccinelle with the following
script:

@@
@@
- void
+ int
main(...) {
	...
-	return;
+	return 0;
	...
}

Approximately 40 files had to be edited by hand as coccinelle was unable to
fix them.

Signed-off-by: Keith Packard <keithp@keithp.com>
2023-04-14 07:49:41 +09:00
..
src samples, tests, boards: Switch main return type from void to int 2023-04-14 07:49:41 +09:00
CMakeLists.txt samples and tests: Add REQUIRED to Zephyr find_package call 2023-03-02 09:58:27 +01:00
prj.conf
README.rst
sample.yaml sanitycheck: inclusive language 2020-08-27 07:04:07 -04:00

.. _google_kukui:

Kukui general features
######################

Overview
********

This provides access to :ref:`Kukui <google_kukui_board>` through a serial shell
so you can try out the supported features, including I2C, GPIO and flash access.

Building
********

The sample can be built as follows:

.. zephyr-app-commands::
   :zephyr-app: samples/boards/google_kukui
   :board: google_kukui
   :goals: build
   :compact:

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

.. code-block:: console

    Welcome to Google Kukui

    uart:~$    (press tab)
      clear    flash    gpio     help     history  i2c      resize   shell
    uart:~$ i2c read I2C_2 36
    00000000: 82 00 00 ff 80 7f 00 ff  00 00 c1 0a c8 5b 0c 62 |........ .....[.b|