Where are the CMSIS-DSP libraries for STM32U5A9J

[nico23]

So I have a board which I'm correctly using with threadX and TouchGFX.

I want to implement a function that calculates the FFT of a signal, but I'm having a hard time finding the CMSIS-DSP libraries.

I need to include the classic math library for ARM

#include "arm_math.h"
#include "arm_const_structs.h"

But in cubeMX I'm finding various DSP libraries

what should I use?

[Andrew Neil]

Does this help: How to integrate CMSIS-DSP libraries on a STM32 project ?

 

Also: Configuring DSP libraries on STM32CubeIDE ?

[nico23]

AHai @Andrew Neil 

This helped a lot, thanks! The only thing that seems not to be explained is why I'm seeing a series of error "multiple definition of" "first defined here"

<my_project>/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_biquad_cascade_df1_q15.c:318: multiple definition of `arm_biquad_cascade_df1_q15'; ./Drivers/DSP/Source/FilteringFunctions/FilteringFunctions.o:<my_project>/Drivers/CMSIS/DSP/Source/FilteringFunctions/arm_biquad_cascade_df1_q15.c:318: first defined here

 Which one was I supposed to keep?

[nico23]

Ok, so the issue has been fixed following this https://community.st.com/t5/stm32-mcus-embedded-software/quot-first-defined-here-quot-error-with-cmsis-dsp-1-15/td-p/601583

But I still don't understand what the difference is between the <library>.c and <library>F16.c (I think the F16 executes operations on 16bit floats and not 32bit floats)

[Ozone]

> But I still don't understand what the difference is between the <library>.c and <library>F16.c (I think the F16 executes operations on 16bit floats and not 32bit floats)

Did you mean "Q15" here ? https://en.wikipedia.org/wiki/Q_(number_format)

The CMSIS libraries support this format for years now.
At least in the DSP Lib version I have (F0..F7), those source files are still named *q15.c and *q15.h.

[nico23]

No, I mean *F16.c

For instance, I'm seeing the file SupportFunctions.c and SupportFunctionsF16.c.

Deleting the SupportFunctions.c (and all the other .c without the F16) made the errors disappear