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STM32N6 CMSIS-DSP arm_rfft_q31 hard fault with M55 MVE, runs with ARM_MATH_AUTOVECTORIZE

jylho
Associate

Has anyone had success with the CMSIS-DSP arm_rfft_q31 or other of the M55 HELIUM MVEI/MVEF enabled CMSIS-DSP functions on the STM32N6? 

Is there a functional FFT example or STM32CubeMX project available? The STM32N6 FE 1.2.0 example CORTEX-HELIUM does not seem to utilize CMSIS-DSP.

Whenever I try to utilize the CMSIS-DSP FFT-functions, I am experiencing hard fault when entering the arm_rfft_q31, function, if the M55 HELIUM MVEI/MVEF support is enabled.

My FSBL project builds successfully and I am currently using ARM_MATH_AUTOVECTORIZE as a temporary solution, with limited performance.

Please let me know for working examples, tips, or known caveats of using CMSIS-DSP with HELIUM MVEI/MVEF on STM32N6. I am looking for proof, that the STM32N6 MVEI and MVEF are functional and supported with CMSIS-DSP.

Thanks!

 

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