printf from secure world

[StefanHri]

Hi

when I try to use printf in the secure wold my nRF9160 resets. I assume that something needs to be configured differently but I don't know what.

The skeleton of my project can be found here: https://devzone.nordicsemi.com/support/243133

Thank you!

[StefanHri]

Any ideas?

[Håkon Alseth]

Hi,

 

I think your best bet is to route prints to another UART peripheral in your secure region.

Here's an example that does this.

Pay attention to the CMakeLists.txt, spm.overlay and spm.conf.

secure_prints_hello_world.zip

 

Note that BSDlib tracing uses UART1, so be careful to use this if you ever need to do a trace collection.

 

Kind regards,

Håkon