Gu Jasper / Motor_200Nm_V0

Dependencies:   mbed-dev-f303 FastPWM3

FastMath/FastMath.cpp

Committer:
Rushu
Date:
2019-05-08
Revision:
51:b0a3ef66ea3d
Parent:
20:bf9ea5125d52

File content as of revision 51:b0a3ef66ea3d:

#include "FastMath.h"
#include "LUT.h"

const float Multiplier = 81.4873308631f;

float FastMath::FastSin(float theta){
    while (theta < 0.0f) theta += 6.28318530718f;
    while (theta >= 6.28318530718f) theta -= 6.28318530718f;    
    return SinTable[(int) (Multiplier*theta)] ;
    }
    
float FastMath::FastCos(float theta){
    return FastSin(1.57079632679f - theta);
    }
   //========HJB added=====// 
int   FastMath::Sgn(float d){
    if(d<0) return -1;
    else if (d==0) return 0;
    else return 1;
    }