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  • Matrix math C++ class library for MCUs?

    From Dave Nadler@21:1/5 to All on Tue Nov 1 11:16:02 2022
    Hi Guys - I'm searching for a C++ matrix math library suitable for
    Kalman filter implementation on MCUs. I found a few but they may be
    zombies, for example Eigen https://stackoverflow.com/questions/73883276/eigen-matrix-template-library-over-arm-cmsis-dsp
    got crickets.
    What do you guys use?
    Thanks in advance,
    Best Regards, Dave

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  • From David Brown@21:1/5 to Dave Nadler on Tue Nov 1 18:02:28 2022
    On 01/11/2022 16:16, Dave Nadler wrote:
    Hi Guys - I'm searching for a C++ matrix math library suitable for
    Kalman filter implementation on MCUs. I found a few but they may be
    zombies, for example Eigen https://stackoverflow.com/questions/73883276/eigen-matrix-template-library-over-arm-cmsis-dsp got crickets.
    What do you guys use?
    Thanks in advance,
    Best Regards, Dave

    How big are your matrices? If they are just 2x2, you can probably roll
    your own code as quickly as you can find and test something from the
    net. Templates are sometimes very useful and elegant, but if you have
    fixed known types and sizes, specific classes and functions are often
    easier to debug.

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  • From Dave Nadler@21:1/5 to David Brown on Tue Nov 1 15:16:07 2022
    On 11/1/2022 1:02 PM, David Brown wrote:
    On 01/11/2022 16:16, Dave Nadler wrote:
    Hi Guys - I'm searching for a C++ matrix math library suitable for
    Kalman filter implementation on MCUs. I found a few but they may be
    zombies, for example Eigen
    https://stackoverflow.com/questions/73883276/eigen-matrix-template-library-over-arm-cmsis-dsp got crickets.
    What do you guys use?
    Thanks in advance,
    Best Regards, Dave

    How big are your matrices?  If they are just 2x2, you can probably roll
    your own code as quickly as you can find and test something from the
    net.  Templates are sometimes very useful and elegant, but if you have
    fixed known types and sizes, specific classes and functions are often
    easier to debug.

    Certainly a fair bit bigger than 2x2, non-sparse.
    Eigen does seem to be active but don't know about use on MCUs.
    M7 with adequate RAM should be OK though.
    Using templates for decades during which diagnostics have improved ;-)

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  • From Paul Rubin@21:1/5 to Dave Nadler on Tue Nov 1 22:14:43 2022
    Dave Nadler <drn@nadler.com> writes:
    Hi Guys - I'm searching for a C++ matrix math library suitable for
    Kalman filter implementation on MCUs. I found a few but they may be
    zombies, for example Eigen

    I'm unfamiliar with Eigen and only vaguely informed about Kalman
    filters, but doing eigenvalue calculation properly takes some know-how,
    and you're better off using a library rather than rolling your own.
    Does the MCU angle actually matter in relation to the library choice?
    There are a zillion linear algebra packages out there, the best known
    probably being LAPACK.

    I have no idea if this is suitable for your requirements:

    https://www.gnu.org/software/gsl/

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  • From Dave Nadler@21:1/5 to Paul Rubin on Wed Nov 2 07:36:27 2022
    On 11/2/2022 1:14 AM, Paul Rubin wrote:
    I have no idea if this is suitable for your requirements:
    https://www.gnu.org/software/gsl/
    Thanks Paul, unfortunately GSL has polluting GPL license; can't use it
    for current project... Eigen license is non-polluting.

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