How to combine app core firmware and net core firmware into one merged firmware

[mingjkl]

In the nrf5340 development process.I compile an app core hex from project A and a net core hex firmware from another project B. what method can I quickly obtain a merged firmware.

[mingjkl]

• mergehex executable: The mergehex executable is a command line utility that enables you to combine several HEX files into a single file.
• infocenter.nordicsemi.com/index.jsp