• CMSIS DSP - FFT / RFFT
    Recently I've been trying to implement FFT provided in CMSIS-DSP libraries. And something strange happens - some of output array elements have values below 0. I am using arm_rfft_fast_f32 . According...
  • CFFT AND RFFT using CMSIS DSP library
    Hi, I am currently trying to use the CMSIS DSP library for finding the frequency bin. I have used both  CFFT and RFFT function to compute the frequency bin of input signal. My input data is of 128 samples...
  • Too much or too less stack size
    Hi, I've had a question some time ago, because I thought the compiler generates wrong code. Your answers told me that my startup-configuration seems to be wrong. Here I want to say thank you for the...
  • Why is my Cortex-M4 taking too much cycles?
    Note: This was originally posted on 10th September 2012 at http://forums.arm.com Dear Arm-experts, i wanted to use the FPU of my STM32F4 (Cortex-M4). To see if it's working properly i compared with this...
  • CMSIS, DSP
    Hi, I am trying to design the butterworth filter using CMSIS library in cortex-M4 processor.. i know how to do it in MATLAB(and even fdatool), but i don't know anything about CMSIS library.. i saw the...