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Complex numbers in F28069

c_ 64
Intellectual 630 points

I just bought the Piccolo controlSTICK, and this is probably a very silly question, but I'll ask it anyhow: How do I define 32 bit floating complex numbers? I'm implementing the Goertzel algorithm, and am in the need for complex valued coefficients.

Thanks!

  • 0
    TI__Guru* 92130 points

    c_ 64 said:

    I just bought the Piccolo controlSTICK, and this is probably a very silly question, but I'll ask it anyhow: How do I define 32 bit floating complex numbers? I'm implementing the Goertzel algorithm, and am in the need for complex valued coefficients.

    Thanks!

    The c2000 compiler does not have a native complex number type.  You could typedef this yourself as two floating point numbers.   I've moved this to the compiler forum in case the experts here have some other suggestions.

    -Lori

  • 0 in reply to Lori Heustess
    TI__Guru* 92130 points

    For this algorithm you may also just assume the data is in a particular format/order.  For example if you have an array they may be in real, imaginary, real, imaginary.... order or all the reals may be first and all the imaginary may be in the 2nd half of the array.  This is how we coded up the complex FFT for the FPU.

    Regards

    Lori

  • 0 in reply to Lori Heustess
    Intellectual 630 points

    Hi,

    Thanks for the reply. No wonder that I didn't figure out how to define complex numbers ; ) I guess until new information comes along, I'll define the real and imaginary parts separate (coming from a Matlab environment, I'm used to not have to think about most things ; ) )