DSP functions

[superpanza]

Hello, how can i use the CMSIS-DSP functions?
I'm trying to perform an FFT over some samples but i'm not able to import arm_math.h from DSP lib. It does not find any math_arm.h lib from filesystem. I'm pretty sure that the header file is there (view img

)
i'm using a nucleoF401RE board, and i've installed the stm32core via Arduino IDE board manager

[fpistm]

Hi @superpanza
Currently, this is not provided.
I've already answer this kind of issue here:
#569 (comment)

I think I will add a way to use it.

[superpanza]

Great!
Thank you for considering adding the feature.
I've just tried to apply the solution you suggest in #569 and now the lib (arm_math.h) is loaded, the code compile successfully, but the linking phase fail with something like

/Users/userino/Library/Arduino15/packages/STM32/tools/arm-none-eabi-gcc/8.2.1-1.7/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld: FFTTest.ino.cpp:(.text._Z6armFFTPfS_i+0x1a): undefined reference to `arm_cmplx_mag_f32'

The prototype of that function is clearly in arm_math.h
Any idea on how to move on?

[fpistm]

I guess, you have to add the c source file defining the function in the build:
CMSIS/5.5.1/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mag_f32.c

like I've made for the filtering:
fpistm@e891921#diff-766ab07e0a5996a0f67900b49895d65f

[fpistm]

Do not hesitate to provide a small test sketch then I will be able to test when I will implement this request.

[fpistm]

Hi @superpanza
I've added the support of CMSIS DSP software library here #685
Could you test it and give me your feedback, please ?
Thanks in advance.