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Thread: ARM_MATH library

  1. #1
    Junior Member
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    ARM_MATH library

    Hello:

    I have been successful in including the arm.math.h library and running and example fft on the teensy 4.1 an am excited that this capability is now available. Only 1 question. I cannot find any GOOD documentation on the arm_math library funcitons. Take for instance the fft functions. The example works but appears to have a extern data file with sample rates in the order of 100Khz, thus giving a maximum fft frequency of about 50Khz. I cannot see how the sample rate was first input to the fft routines or if that is even possible to change it. Better documentation has to exist that I have not found yet. Anyone??

  2. #2
    Senior Member+ mjs513's Avatar
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    You might check this: https://www.keil.com/pack/doc/CMSIS/...__math_8h.html. Arm_math is part of the CMSIS_DSP library which is part of Teensyduino already. If you do a search for CMSIS DSP or FFT in the forum will give you quite a bit of info.

    https://forum.pjrc.com/threads/71128...ight=cmsis+dsp
    or
    https://forum.pjrc.com/threads/52651...ight=cmsis+dsp

  3. #3
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    Smile CMSIS math library

    Quote Originally Posted by mjs513 View Post
    You might check this: https://www.keil.com/pack/doc/CMSIS/...__math_8h.html. Arm_math is part of the CMSIS_DSP library which is part of Teensyduino already. If you do a search for CMSIS DSP or FFT in the forum will give you quite a bit of info.

    https://forum.pjrc.com/threads/71128...ight=cmsis+dsp
    or
    https://forum.pjrc.com/threads/52651...ight=cmsis+dsp
    thx, it will take some time to digest it all

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