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0b90fd5adf
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>
.. _samples_lcd_hd44780:
LCD HD44780 driver sample
#########################
Overview
********
Display text strings on parallel interfacing HD44780 based
generic LCD controller using GPIO pins to interface with
Arduino Due (SAM3).
Building and Running
********************
This project can be built and executed on as follows:
.. zephyr-app-commands::
:zephyr-app: samples/drivers/lcd_hd44780
:host-os: unix
:board: arduino_due
:goals: flash
:compact:
Sample Output
=============
.. code-block:: console
LCD Init
Page 1: message
Page 2: message
Page 3: message
Display output
==============
.. code-block:: console
********************
Arduino Due
yalpsiD DCL 4x02
********************
.. code-block:: console
-------------------
Zephyr Rocks!
My super RTOS
-------------------
.. code-block:: console
--------------------
--------HOME--------
I am home!