IAR build with CMAKE for stm32n6 fails

[alexian79]

Operating System

Windows 11

Commit SHA

86a4990

Board

stm32n6

Firmware

examples/device/cdc_msc

What happened ?

Build fails with the following errors:
cdc_msc - Debug
system_stm32n6xx_fsbl.o

SAU->RNR = 0;		
^		

Error[Pe020]: identifier "SAU" is undefined D:\projects\SC3\test\BB\tinyusb\hw\mcu\st\cmsis_device_n6\Source\Templates\system_stm32n6xx_fsbl.c 192

SCB_NS->CPACR |= ((3UL << 20U)|(3UL << 22U));  /* set CP10 and CP11 Full Access */		
^		

Error[Pe020]: identifier "SCB_NS" is undefined D:\projects\SC3\test\BB\tinyusb\hw\mcu\st\cmsis_device_n6\Source\Templates\system_stm32n6xx_fsbl.c 265

CMSE_NS_ENTRY uint32_t SECURE_SystemCoreClockUpdate(void)
^
Error[Pe020]: identifier "__cmse_nonsecure_entry" is undefined D:\projects\SC3\test\BB\tinyusb\hw\mcu\st\cmsis_device_n6\Source\Templates\system_stm32n6xx_fsbl.c 470

CMSE_NS_ENTRY uint32_t SECURE_SystemCoreClockUpdate(void)
^
Error[Pe101]: "uint32_t" has already been declared in the current scope (at line 30 D:\projects\SC3\test\BB\tinyusb\hw\mcu\st\cmsis_device_n6\Source\Templates\system_stm32n6xx_fsbl.c 470
of "C:\iar\ewarm-9.70.2\arm\inc\c\stdint.h")

CMSE_NS_ENTRY uint32_t SECURE_SystemCoreClockUpdate(void)
^
Error[Pe065]: expected a ";" D:\projects\SC3\test\BB\tinyusb\hw\mcu\st\cmsis_device_n6\Source\Templates\system_stm32n6xx_fsbl.c 470

Total number of errors: 5

This is IAR issue that __ARM_FEATURE_CMSE is set internally to 1, and I have no idea how to change it. it complains if you try to override it in source code with a define.
I have tried with iar 9.60.4 and 9.70.2.

If you confirm that is is purely IAR internal error, and there is no way to set __ARM_FEATURE_CMSE=3 in Cmake I can push this issue with IAR. Thanks.

I have tried to set target in configuration to CM55 or select dev kit, but it is not helping

How to reproduce ?

1. create new project from CMAKE
2. point to CmakeLists.txt from tinyusb\examples\device\cdc_msc\
3. select correct preset

Debug Log as txt file (LOG/CFG_TUSB_DEBUG=2)

none

Screenshots

No response

I have checked existing issues, discussion and documentation

• I confirm I have checked existing issues, discussion and documentation.

[HiFiPhile]

I think you can try to build a template project from STM32Cube, if the error persist it could be a ST's HAL bug. It's generally not a good idea to override internal symbol with double underscore.

[alexian79]

I am able to create custom IAR project with cubemx and make tinyusb work with stm32n6 but wanted to see how Cmake and documented "how to" works, and decided to build project from the examples folder. And this causes issue described above.

[HiFiPhile]

I am able to create custom IAR project with cubemx and make tinyusb work with stm32n6 but wanted to see how Cmake and documented "how to" works, and decided to build project from the examples folder. And this causes issue described above.

Nice to see my IAR integration effort is not in vain :)

Normally internal symbols like __ARM_FEATURE_CMSE are defined automatically by IAR. Maybe the processor define in https://github.com/hathach/tinyusb/blob/master/examples/build_system/cmake/cpu/cortex-m55.cmake is incorrect, you can compare with your cubemx project's build output (set Filter level to All in Build log window)

[alexian79]

Thanks for your efforts!
tried to add extra param to

but same error for now.

Might be worth for me to rise issue with IAR on Cmake support.

[HiFiPhile]

-DTOOLCHAIN=iar is no longer needed.

you can compare with your cubemx project's build output (set Filter level to All in Build log window)

After compare the output myself I found --cmse flag is missing:

Should be fixed by #3367

[alexian79]

thanks