GPIO_IOToggle_TrustZone example using STM32 TrustZone

[stst9187]

Hi everyone,

I’m currently experimenting with the GPIO_IOToggle_TrustZone example using STM32 TrustZone.

When I build and flash both the Secure and NonSecure firmware, everything works correctly: the LED toggles as expected, so the interaction between Secure and NonSecure worlds seems fine.

However, I’m running into an issue with debugging:

• I can successfully debug the Secure project
• but I cannot seem to debug the NonSecure project

I am using STM32CubeIDE and I would like to understand how to properly configure the environment to be able to debug the NonSecure application as well.

Specifically:

• Do I need a separate debug configuration for the NonSecure project?
• Is it required to start debugging the Secure project first and then attach to NonSecure?
• Or is there a specific STM32CubeIDE / ST-LINK / TrustZone debug configuration that I am missing?

Any guidance on the correct way to set up STM32CubeIDE for debugging the NonSecure project would be really appreciated.

Thanks in advance!