MBOX Interface

Overview

This sample demonstrates how to use the MBOX API.

Building and Running

The sample can be built and executed on boards supporting MBOX.

Building the application for nrf5340dk_nrf5340_cpuapp

# From the root of the zephyr repository
west build -b nrf5340dk_nrf5340_cpuapp samples/drivers/mbox/
west debug

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 the application (APP) core another is the network (NET) core:

*** Booting Zephyr OS build zephyr-v3.1.0-2383-g147aee22f273  ***
Hello from APP
Pong (on channel 0)
Ping (on channel 1)
Pong (on channel 0)
Ping (on channel 1)
Ping (on channel 1)
Pong (on channel 0)
Ping (on channel 1)
Pong (on channel 0)
Ping (on channel 1)
...

*** Booting Zephyr OS build zephyr-v3.1.0-2383-g147aee22f273  ***
Hello from NET
Ping (on channel 0)
Pong (on channel 1)
Ping (on channel 0)
Pong (on channel 1)