digital audio mod11 / Mbed 2 deprecated fftimplement

oldexamplecode

Dependencies:   mbed

complexmath.h@0:6863633bf8a4, 2017-03-24 (annotated)

Committer:
rik
Date:
Fri Mar 24 11:22:30 2017 +0000
Revision:
0:6863633bf8a4
oldexamplecode;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rik 0:6863633bf8a4 1
rik 0:6863633bf8a4 2 // This file contains an implementation of complex mathmatics
rik 0:6863633bf8a4 3 // i.e. definition of a complex unit and basic operationds such as magnitude, phase, addition and multiplication
rik 0:6863633bf8a4 4
rik 0:6863633bf8a4 5 #pragma once
rik 0:6863633bf8a4 6 #ifndef _COMPLEX_MATH_H
rik 0:6863633bf8a4 7 #define _COMPLEX_MATH_H
rik 0:6863633bf8a4 8
rik 0:6863633bf8a4 9 #include "LookupTables.h"
rik 0:6863633bf8a4 10 #include <math.h> // only for sqrt, not for cos sin
rik 0:6863633bf8a4 11
rik 0:6863633bf8a4 12 struct complex_num{
rik 0:6863633bf8a4 13 float imaginary;
rik 0:6863633bf8a4 14 float real;
rik 0:6863633bf8a4 15 };
rik 0:6863633bf8a4 16
rik 0:6863633bf8a4 17 // Complex adition and multiplication
rik 0:6863633bf8a4 18 complex_num complex_add(complex_num A, complex_num B);
rik 0:6863633bf8a4 19 complex_num complex_multiply(complex_num A, complex_num B);
rik 0:6863633bf8a4 20
rik 0:6863633bf8a4 21 // Retrieve the phase and magnitude of a complex number (polar form)
rik 0:6863633bf8a4 22 float complex_phase(complex_num A);
rik 0:6863633bf8a4 23 float complex_magnitude(complex_num A);
rik 0:6863633bf8a4 24
rik 0:6863633bf8a4 25 // Transform polar form to a complex number (phase in radians)
rik 0:6863633bf8a4 26 complex_num complex_transform(float phase, float magnitude);
rik 0:6863633bf8a4 27
rik 0:6863633bf8a4 28 // Complex conjugate
rik 0:6863633bf8a4 29 complex_num complex_conjugate(complex_num A);
rik 0:6863633bf8a4 30
rik 0:6863633bf8a4 31 #endif