• 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) to 10 bit DAC. But I am not sure how I get the coefficients…

  • CMSIS DSP new functionality proposal

    CMSIS DSP is a great tool which allows Cortex-M4 devices to have a great app field range, even replacing some general purpose DSP sometimes. However I am missing some "simple" new functions that could enhance, even more, the use of it.

    For example…

  • 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 not singular. For example, a 4x4 identity matrix …

  • Using CMSIS DSP Function: arm_fir_f32 - Correct Use?

    Hi All;

    I have some questions about correct use of the CMSIS DSP library call arm_fir_32. First, I'll provide some background about what I am doing and what the setup is.

    I have a STM32F4 Discovery board, using IAR EWARM for programming. Just for…

  • How to interface CMSIS library in eclipse based IDE ?

    Hi

    I am unable to find any documentation on how to add library in eclipse based IDE. Presently I am using Freescale's CodeWarrior and I want to add the CMSIS's DSP Library in that.  Thanks in advance

    Kind Regards

    Amit Kumar

  • 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 which content only real part (complex part…