• CMSIS DSP Biquad fixpoint error on Cortex M4
    Hi I have a problem by implementing a CMSIS Biquad lowpass filter an a Cortex M4 from TI. The CMSIS FLOAT filter is working but not the fixpoint Q15 one. It's just a simple 2nd order (1 stage) filter...
  • CMSIS DSP Libraries integration
    Hello, I am using TI Hercules Evaluation Board TMS570LS0714 which is ARM Cortex R. For this processor TI provides pre-compiled libraries, available at http://www.ti.com/tool/HERCULES-DSPLIB .I am...
  • 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 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...
  • 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...