.. zephyr:code-sample:: openamp
   :name: OpenAMP
   :relevant-api: ipm_interface

   Send messages between two cores using OpenAMP.

Overview
********

This application demonstrates how to use OpenAMP with Zephyr. It is designed to
demonstrate how to integrate OpenAMP with Zephyr both from a build perspective
and code. Note that the remote and primary core images can be flashed
independently, but sysbuild must be used in order to build the images.

Building the application for lpcxpresso54114_m4
***********************************************

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/ipc/openamp
   :board: lpcxpresso54114/lpc54114/m4
   :goals: debug
   :west-args: --sysbuild

Building the application for lpcxpresso55s69/lpc55s69/cpu0
**********************************************************

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/ipc/openamp
   :board: lpcxpresso55s69/lpc55s69/cpu0
   :goals: debug
   :west-args: --sysbuild

Building the application for mps2/an521/cpu0
********************************************

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/ipc/openamp
   :board: mps2/an521/cpu0
   :goals: debug
   :west-args: --sysbuild

Building the application for v2m_musca_b1/musca_b1
**************************************************

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/ipc/openamp
   :board: v2m_musca_b1/musca_b1
   :goals: debug
   :west-args: --sysbuild

Building the application for mimxrt1170_evk_cm7
***********************************************

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/ipc/openamp
   :board: mimxrt1170_evk_cm7
   :goals: debug
   :west-args: --sysbuild

Open a serial terminal (minicom, putty, etc.) and connect the board with the
following settings:

- Speed: 115200
- Data: 8 bits
- Parity: None
- Stop bits: 1

Reset the board and the following message will appear on the corresponding
serial port, one is master another is remote:

.. code-block:: console

   **** Booting Zephyr OS build zephyr-v1.14.0-2064-g888fc98fddaa ****
   Starting application thread!

   OpenAMP[master] demo started
   Master core received a message: 1
   Master core received a message: 3
   Master core received a message: 5
   ...
   Master core received a message: 99
   OpenAMP demo ended.


.. code-block:: console

   **** Booting Zephyr OS build zephyr-v1.14.0-2064-g888fc98fddaa ****
   Starting application thread!

   OpenAMP[remote] demo started
   Remote core received a message: 0
   Remote core received a message: 2
   Remote core received a message: 4
   ...
   Remote core received a message: 98
   OpenAMP demo ended.