.. zephyr:code-sample:: ipc-icmsg
:name: IPC service: icmsg backend
:relevant-api: ipc
Send messages between two cores using the IPC service and icmsg backend.
Overview
********
This application demonstrates how to use IPC Service and the icmsg backend with
Zephyr. It is designed to demonstrate how to integrate it with Zephyr both
from a build perspective and code.
Building the application for nrf5340dk/nrf5340/cpuapp
*****************************************************
.. zephyr-app-commands::
:zephyr-app: samples/subsys/ipc/ipc_service/icmsg
:board: nrf5340dk/nrf5340/cpuapp
: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 host another is remote:
.. code-block:: console
*** Booting Zephyr OS build zephyr-v3.2.0-323-g468d4ae383c1 ***
[00:00:00.415,985] <inf> host: IPC-service HOST demo started
[00:00:00.417,816] <inf> host: Ep bounded
[00:00:00.417,877] <inf> host: Perform sends for 1000 [ms]
[00:00:01.417,114] <inf> host: Sent 488385 [Bytes] over 1000 [ms]
[00:00:01.417,175] <inf> host: Wait 500ms. Let net core finish its sends
[00:00:01.917,266] <inf> host: Stop network core
[00:00:01.917,297] <inf> host: Reset IPC service
[00:00:01.917,327] <inf> host: Run network core
[00:00:01.924,865] <inf> host: Ep bounded
[00:00:01.924,896] <inf> host: Perform sends for 1000 [ms]
[00:00:02.924,194] <inf> host: Sent 489340 [Bytes] over 1000 [ms]
[00:00:02.924,224] <inf> host: IPC-service HOST demo ended
.. code-block:: console
*** Booting Zephyr OS build zephyr-v3.2.0-323-g468d4ae383c1 ***
[00:00:00.006,256] <inf> remote: IPC-service REMOTE demo started
[00:00:00.006,378] <inf> remote: Ep bounded
[00:00:00.006,439] <inf> remote: Perform sends for 1000 [ms]
[00:00:00.833,160] <inf> sync_rtc: Updated timestamp to synchronized RTC by 1)
[00:00:01.417,572] <inf> remote: Sent 235527 [Bytes] over 1000 [ms]
[00:00:01.417,602] <inf> remote: IPC-service REMOTE demo ended
*** Booting Zephyr OS build zephyr-v3.2.0-323-g468d4ae383c1 ***
[00:00:00.006,256] <inf> remote: IPC-service REMOTE demo started
[00:00:00.006,347] <inf> remote: Ep bounded
[00:00:00.006,378] <inf> remote: Perform sends for 1000 [ms]
[00:00:01.006,164] <inf> remote: Sent 236797 [Bytes] over 1000 [ms]
[00:00:01.006,195] <inf> remote: IPC-service REMOTE demo ended
f1fc468e99