fast_math.h File Reference

this is the header file of fast_math.c, the macros of fast amplitude limiting algorithm and cosine function evaluation algorithm are defined. More...

Go to the source code of this file.

Macros
#define	fast_constrain(x, low, high)   ((x)<(low)?(low):((x) >(high)?(high):(x)))
	fast clipping algorithm More...
#define	fast_cos(x)   fast_sin(1.5707963f - x);
	fast calculation of cosine More...

Functions
float	fast_sin (float theta)
	fast calculation of sine More...

Detailed Description

this is the header file of fast_math.c, the macros of fast amplitude limiting algorithm and cosine function evaluation algorithm are defined.

Author

Lao·Zhu

Version

V1.0.1

Date

10. October 2021

Definition in file fast_math.h.

Macro Definition Documentation

fast_constrain

#define fast_constrain	(		x,
			low,
			high
	)		((x)<(low)?(low):((x) >(high)?(high):(x)))

fast clipping algorithm

Parameters

[in]	x	number of to be clipped
[in]	low	minimum number
[in]	high	maximum number

Return values

input

value after clipping

Definition at line 20 of file fast_math.h.

fast_cos

#define fast_cos

(

x

)

fast_sin(1.5707963f - x);

fast calculation of cosine

Parameters

[in]

x

angle to be calculated

Return values

cosine

value of angle theta

Definition at line 27 of file fast_math.h.

Function Documentation

fast_sin()

float fast_sin

(

float

theta

)

fast calculation of sine

Parameters

[in]

theta

angle to be calculated

Return values

sine	value of angle theta

Definition at line 72 of file fast_math.c.

References sin_tab.

Referenced by foc_calculate_dutycycle().