• Problem with arm_rfft_fast_f32
    Hi I tested  arm_rfft_fast_f32 function from CMSIS-DSP 1.4.4 with generated 50hz sine wave at 1000Hz sample rate using 1024 samples, but i get peek value at 102, not 51 which i should get 1000/1024 ~0...
  • 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...
  • cmsis dsp
    Note: This was originally posted on 6th March 2013 at http://forums.arm.com i am trying to add cmsis dsp library in ngx audio example lpc4330 explorer board. i include arm_math.h it gives error i dont...
  • CMSIS DSP Application with RTX
    Hi, Has anyone implemented Digital Filter using CMSIS library? If yes, I would like to know is descaling of input signal to +/- 1V is required as mentioned in Keils sample application? Why this...
  • 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...