add large assembly code to a Zephyr project

Hi, I have a nRF5340 Development Kit. I want to add a large amount of assembly code from a previous Cortex M4 project (from PSoC Creator 4.2). Project has *.s files and *.h files.

How can I adapt the assembly code into the Zephyr project? Where I can find the documentation that shows me how to add assembly code to a Zephyr project?

I don't know if is important, I use Visual Code Studio for development and started from echo project (because this project is using I2S peripheral).

Thank you.

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