This is the documentation for the latest (master) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Sample mailbox application


Some NXP microcontrollers from LPC family are dual-core, this sample application uses a mailbox to send messages from one processor core to the other.

This sample applies to the following boards:


Building the application for lpcxpresso54114_m4

# From the root of the zephyr repository
west build -b lpcxpresso54114_m4 samples/subsys/ipc/ipm_mcux
west debug

Building the application for lpcxpresso55s69_cpu0

# From the root of the zephyr repository
west build -b lpcxpresso55s69_cpu0 samples/subsys/ipc/ipm_mcux
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:

***** Booting Zephyr OS v1.11.0-764-g4e3007a *****
Hello World from MASTER! arm
Received: 1
Received: 99