.. 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:

*** 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

*** 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