STM32U5 - GPIO_IOToggle_TrustZone example gets stuck in HardFault-handler

[SReic.1]

I followed the GPIO_IOToggle_TrustZone Example for STM32U5, which is documented in UM2883 (STM32CubeU5GettingStarted.pdf; section 5.1.1).

The development board used is a NUCLEO-U575ZI-Q.

Details:

• I've set the TZEN-Bit in FLASH_OPTR using STM32CubeProg successfully
• Used STM32CubeIDE to import existing project (%USERPROFILE%\STM32Cube\Repository\STM32Cube_FW_U5_V1.0.0\Projects\NUCLEO-U575ZI-Q\Examples\GPIO\GPIO_IOToggle_TrustZone) from filesystem into default workspace (%USERPROFILE%\STM32CubeIDE\workspace_1.7.0)
• sticked to the guide in UM2883:

1. Open the STM32CubeIDE toolchain
   1. Open Multi-projects workspace file .project
   2. Rebuild xxxxx_Secure project
   3. Rebuild xxxxx_NonSecure project
   4. Launch Debug as STM32 Cortex-M C/C++ Application for the secure project.
   5. In the Edit configuration window, select the Startup panel, and add load image and symbols of the non-secure project.
   6. Be careful, the non-secure project has to be loaded before the secure project.
   7. Then click "OK"
   8. Run the example on debug perspective.

When I set a breakpoint in HAL_SYSTICK_Callback (where the LED is toggelt) this breakpoint is never hit. Instead, when initialization is done, the HardFault_Handler() in %USERPROFILE%\STM32Cube\Repository\STM32Cube_FW_U5_V1.0.0\Projects\NUCLEO-U575ZI-Q\Examples\GPIO\GPIO_IOToggle_TrustZone\Secure\Src is entered.

All steps were checked by one of my colleagues, so my last hope is this expert forum here.

[Imen GH]

Hello @SReic.1​ ,

Welcome to STM32 Community!

I recommend you to have a look to readme file under STM32Cube directory:

STM32Cube\Repository\ STM32Cube_FW_U5_V1.0.0/Projects/B-U585I-IOT02A/Examples/GPIO/GPIO_IOToggle_TrustZone/readme.html

Imen

[SReic.1]

Hi Imen,

Thank you. In the meantime I have found my mistake. It was that I forgot to set the values for SECWM[1-2]_PSTRT and SECWM[1-2]_PEND with STM32CubeProgrammer.

I sticked to STM32Cube_FW_U5_V1.0.0\Projects\NUCLEO-U575ZI-Q\Examples\GPIO\GPIO_IOToggle_TrustZone\Readme.html.

Stephan

[Imen GH]

Hello @SReic.1​ ,

Really glad to know you overcame your problem

Thank you.

Imen