fft arm

gcc/makefile_appli

@@ -308,6 +308,22 @@ board_c_files += \
 	Appli/Core/Src/fx_echo.c \
 	Appli/Core/Src/fx_reverb.c
 
+# CMSIS-DSP (vendored from the STM32H7RS firmware package, source-only : no
+# precompiled .a for this device). Only the RFFT float32 chain needed by
+# audio_analysis.c is included, not the whole library. The MVE/Helium code
+# paths in arm_cfft_f32.c/arm_cfft_init_f32.c are guarded behind
+# ARM_MATH_MVEF, which is never defined here, so they compile out on this
+# Cortex-M7 (no Helium) target.
+board_c_files += \
+	$(Drivers_path)/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_f32.c \
+	$(Drivers_path)/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_init_f32.c \
+	$(Drivers_path)/CMSIS/DSP/Source/TransformFunctions/arm_cfft_f32.c \
+	$(Drivers_path)/CMSIS/DSP/Source/TransformFunctions/arm_cfft_init_f32.c \
+	$(Drivers_path)/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix8_f32.c \
+	$(Drivers_path)/CMSIS/DSP/Source/TransformFunctions/arm_bitreversal2.c \
+	$(Drivers_path)/CMSIS/DSP/Source/CommonTables/arm_common_tables.c \
+	$(Drivers_path)/CMSIS/DSP/Source/CommonTables/arm_const_structs.c
+
 # Drivers
 board_include_paths := \
 	$(Drivers_path)/CMSIS/Include \
@@ -316,6 +332,8 @@ board_include_paths := \
 	$(Drivers_path)/CMSIS/RTOS2/Include \
 	$(Drivers_path)/STM32H7RSxx_BSP/STM32H7S78-DK \
 	$(Drivers_path)/STM32H7RSxx_BSP/Components/wm8904 \
+	$(Drivers_path)/CMSIS/DSP/Include \
+	$(Drivers_path)/CMSIS/DSP/PrivateInclude \
     Appli/Core/Inc \
 	$(gpu2d_path)/TouchGFXNema/include \
 	$(gpu2d_path)/NemaGFX/include