.. zephyr:code-sample:: ipc_multi_endpoint
:name: IPC service: Multi-endpoint
:relevant-api: ipc
Use the IPC Service with multiple endpoints.
This application demonstrates how to use IPC Service with multiple endpoints.
By default, it uses the ``icmsg_me`` backend.
You can also configure it to use the ``icbmsg`` backend.
Building the application for nrf5340dk/nrf5340/cpuapp
*****************************************************
.. zephyr-app-commands::
:zephyr-app: samples/subsys/ipc/ipc_service/multi_endpoint
:board: nrf5340dk/nrf5340/cpuapp
:goals: debug
Open a serial terminal (for example Minicom or PuTTY) and connect the board with the following settings:
* Speed: 115200
* Data: 8 bits
* Parity: None
* Stop bits: 1
After resetting the board, the following message will appear on the corresponding
serial port:
.. code-block:: console
*** Booting Zephyr OS build v3.4.0-rc1-108-gccfbac8b0721 ***
IPC-service HOST [INST 0 - ENDP A] demo started
IPC-service HOST [INST 0 - ENDP B] demo started
IPC-service HOST [INST 1] demo started
HOST [0A]: 1
HOST [0A]: 3
HOST [0B]: 1
HOST [1]: 1
...
HOST [0A]: 99
IPC-service HOST [INST 0 - ENDP A] demo ended.
HOST [0B]: 99
IPC-service HOST [INST 0 - ENDP B] demo ended.
HOST [1]: 99
IPC-service HOST [INST 1] demo ended.
.. code-block:: console
*** Booting Zephyr OS build v3.4.0-rc1-108-gccfbac8b0721 ***
IPC-service REMOTE [INST 0 - ENDP A] demo started
IPC-service REMOTE [INST 0 - ENDP B] demo started
IPC-service REMOTE [INST 1] demo started
REMOTE [0A]: 0
REMOTE [0A]: 2
...
REMOTE [0A]: 98
IPC-service REMOTE [INST 0 - ENDP A] demo ended.
REMOTE [0B]: 98
IPC-service REMOTE [INST 0 - ENDP B] demo ended.
REMOTE [1]: 98
IPC-service REMOTE [INST 1] demo ended.
Changing the backend
********************
To change the backend to ``icbmsg``, switch the devicetree
overlay files as follows:
.. code-block:: console
west build -b nrf5340dk/nrf5340/cpuapp --sysbuild -- \
-DDTC_OVERLAY_FILE=boards/nrf5340dk_nrf5340_cpuapp_icbmsg.overlay \
-Dremote_DTC_OVERLAY_FILE=boards/nrf5340dk_nrf5340_cpunet_icbmsg.overlay
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