• CMSIS Matrix inverse returns singular for nonsingular matrices
    Hi I have been testing the CMSIS DSP matrix inverse function and am observing unexpected results. In particular, the function arm_mat_inverse_f32 returns ARM_MATH_SINGULAR for matrices that are clearly...
  • 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...
  • CMSIS DSP stage_rfft_f32 function
    Hi, I am exploring the CMSIS DSP library. After playing for a while I have 2 questions: -in case I want to evaluate DFT over bigger data window than 4096 I would need to provide Twiddle Coefficient...
  • 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...
  • CMSIS DSP - FIR decimation
    Hi, I am trying to implement FIR decimation on PDM input. Which FIR decimator function should I use? I am now trying to implement arm_fir_decimate_fast_q15 since I need to feed the output (hopefully PCM...