zephyr

Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

bluetooth bluetooth-le embedded embedded-c iot mcu microcontroller real-time rtos zephyr zephyr-rtos zephyros

History

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>		2 years ago
..
src	samples, tests, boards: Switch main return type from void to int	2 years ago
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _i2s_litex_example:

#####################
I2S example
#####################

Overview
********

This is a simple I2S audio transceiver example. You can plug any source of music and listen to it.

Audio Format
************

The driver requires and provides Audio data with the following parameters:

* 44100 kHz sample rate
* Signed 24 bit PCM
* Stereo
* Little endian

Building
********

.. code-block::

   mkdir build && cd build
   cmake -DBOARD=litex_vexriscv ..
   make

Known issues
************

It seems that after a few minutes some music delay occurs, this is because the sound driver is not able to send data as fast as it receives it.