• FFT Computation using CMSIS DSP library
    I have a code that computes FFT using fftpack functions npy_rffti and npy_rfftf . I want to replace them using arm library functions. I have a real signal. I wrote the below code. arm_rfft_fast_instance_f32...
  • CMSIS DSP DCT Type IV or II
    I'm trying to use the CMSIS DSP library to compute a DCT, however I don't understand how it works. Namely what I don't understand is the pointer to the state buffer. What is this state buffer? It's...
  • CMSIS DSP DCT Type IV Functions
    I am trying to implement the DCT Type IV documented here on a nordic DK but cannot figure out how to use this function. Does anyone have an example of this being used? I am most confused about the state...
  • Constructing an arbitrary-frequency NCO/DDS waveform generator with CMSIS-DSP
    Hi all, I've been looking into this challenge for a couple of days, I figured now would be a good time for me to ask some questions on a forum like this. I have done some C++ programming in the past;...
  • Introducing a Python wrapper for CMSIS-DSP with biquads
    My colleagues from the Arm Digital Signal Processing (DSP) software team have introduced a Python wrapper for the CMSIS-DSP library that is compatible with NumPy. The CMSIS-DSP library is a rich collection...