zephyr

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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
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boards
src	samples, tests, boards: Switch main return type from void to int	2023-04-14 07:49:41 +09:00
CMakeLists.txt
prj.conf
README.rst
sample.yaml

README.rst

.. _sample_uart_stm32_single_wire:

STM32 Single Wire UART
######################

Overview
********

A simple application demonstrating how to use the single wire / half-duplex UART
functionality of STM32. Without adaptions this example runs on STM32F3 discovery
board. You need to establish a physical connection between pins PA2 (USART2_TX) and
PC10 (UART4_TX).

Add a `single_wire_uart_loopback` fixture to your board in the hardware map to allow
twister to verify this sample's output automatically.

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

Build and flash as follows, replacing ``stm32f3_disco`` with your board:

 .. zephyr-app-commands::
    :zephyr-app: samples/drivers/uart/stm32/single_wire
    :board: stm32f3_disco
    :goals: build flash
    :compact:

After flashing the console output should not show any failure reports,
but the following message repeated every 2s:

.. code-block:: none

    Received c