RE: Which build version do I use on in Visual Studio for the nrf5340-Audio-DK?

runsiv — Mon, 18 Dec 2023 08:41:58 GMT

Hi Antonio

As the Nrf5340 has two cores, you have the option to build for either the network core or the application core.

The application core is a full-featured Arm Cortex-M33 processor including DSP instructions and FPU. Use this core for tasks that require high performance and for application-level logic.

The M33 TrustZone, one of Cortex-M Security Extensions (CMSE), divides the application MCU into Secure Processing Environment (SPE) and Non-Secure Processing Environment (NSPE). When the MCU boots, it always starts executing from the secure area.

In Zephyr, the firmware of the application core is built using one of the following build targets:

nrf5340dk_nrf5340_cpuapp for build targets with CMSE disabled.
nrf5340dk_nrf5340_cpuapp_ns for build targets that have CMSE enabled and have the SPE firmware alongside the NSPE firmware.

For information about CMSE and the difference between the two environments, see Processing environments.

In your case I would build for either the _cpuapp or the _cpuapp_ns. All depending if you need the security features available on the NRF5340 or not.

You can read more about the different targets for the NRF5340 here

Regards

Runar