nRF52832: How to Include the "arm_math.h" library

[Sami]

Hello,

I'm attempting to include the "arm_math.h" library so that I can use the requisite DSP functions, etc. I'm getting a linker error so I'm not sure what else needs to be done to resolve the symbols. Here is my error:

" undefined reference to `arm_rms_f32' collect2: error: ld returned 1 exit status"

I'm using the nRF52832 (Cortex M4 with FPU) with SDK11.0.0

Any help would be much appreciated!

[Joakim Jakobsen]

Hi sami_cala!
Which IDE are you using?
Did you remember to add the path to the arm_math.h file?
Best regards.

[Sami]

Hi Joakim, I'm using Eclipse (Neon.1a). When you say "add the path", that can entail many different solutions. Are you referring to explicit linking of the library? Also, SDK11.0.0 did not come with the static library "libarm_cortexM4l_math.a", so I had to download it manually. Can you please be a bit more specific? Thanks.

[Kapil Rawat]

Hi,

Steps to include CMSIS-DSP library (arm_math.h library) in your project (Embedded Studio):

1. Install CMSIS-DSP package: Go to Tools>Package Manager>CMSIS DSP Support Package install (it will automatically install core package as well)  

2. Once DSP package installed in your system add library in your project folder: Project>Add Existing file>Browse(select \components\toolchain\cmsis\dsp\GCC\libarm_cortexM4lf_math.a).

3. At last add library path into user include directories:

4. Add predecessor micro definition ARM_MATH_CM4