SAI_AudioPlayback on h745 Discovery Board with Keil Armclang

[axbusch]

STM32H745i Discovery Board Keil 5.37 with Armclang 6.18

I tried the example with the old Keil armcc Compiler and the example works fine. Then i switched to armclang compiler and replaced the "libPDMFilter_cm7_keil_wc16.lib" with the provided "libPDMFilter_cm7_gcc_wc16.a" Everything compiles & runs fine except the fact that the output of the lib in audioPcmBuf[] is always zero

is there something special i have to configure to make this lib work? i can remember in the past there were similar problems with touch gfx and the armclang compiler but these were solved eventually.

DebugScreenshots are in this thread https://community.st.com/s/feed/0D53W00001tMaqKSAS