lpcware

About NXP DSPlib for LPC17XX and LPC13xx

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 18, 2016 by lpcware
Content originally posted in LPCWare by matthewcn on Mon May 30 01:11:14 MST 2016
hi,

I am using lpc1758 work as fft transformation and fft inverse transformation, after i downloaded <<NXP DSP Library 2.0>>
in pdf file <<AN10913_3.pdf>>, there is only FFT function, not FFT inverse function.

my question is:

(1) in FFT function, the parameter type is short int, how it represent decimal? is it Q15?
(2) why there is no fft inverse function, how can i achieve fft inverse transformation?

thank you!

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