iqTrig.h File Reference

Detailed Description

IQ Trignometry Module.

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Overview

IQ Trignometry APIs

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#include "stdint.h"
#include <ti/iqmath/include/IQmathLib.h>
#include "IQmath_mathacl.h"
#include <ti/devices/msp/msp.h>
#include <ti/driverlib/driverlib.h>
#include <ti/driverlib/m0p/dl_core.h>

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Macros
#define	LOOKUP_POINTS   16
	Number of lookup points.
#define	DELX_LOOKUP   _IQ(0.25)/(LOOKUP_POINTS - 1)
	Delta lookup.
#define	INV_DELX_LOOKUP   (int32_t)(((LOOKUP_POINTS - 1) / 0.25))
	Inverted Delta lookup.

Functions
int32_t	sine_LowPriority (int32_t orig_angle)
	LUT based sine computation.
int32_t	cosine_LowPriority (int32_t orig_angle)
	LUT based cosine computation. More...
void	sinCosMATHACLCompute (int_fast32_t orig_angle)
	Configures the MATHACL for sinCos computation and set the angle.
__STATIC_INLINE int_fast32_t	readMATHACLSin (void)
	Reads and scales the MATHACL register with sine result. More...
__STATIC_INLINE int_fast32_t	readMATHACLCos (void)
	Reads and scales the MATHACL register with cosine result. More...
int32_t	sine_LowPrioirty (int32_t orig_angle)
	sine of angle More...
int_fast32_t	sine (int32_t orig_angle)
	sine of angle More...
int_fast32_t	cosine (int32_t orig_angle)
	cosine of angle More...
int_fast32_t	arcTan2 (int_fast32_t iqNInputX, int_fast32_t iqNInputY)
	Finds tan inverse angle. More...

Function Documentation

cosine_LowPriority()

int32_t cosine_LowPriority

(

int32_t

orig_angle

)

LUT based cosine computation.

cosine of angle

Parameters

[in]

orig_angle

Angle input in pu

Returns

Cosine of the angle

References DELX_LOOKUP, INV_DELX_LOOKUP, and LOOKUP_POINTS.

Referenced by readMATHACLCos(), and sine_LowPriority().

readMATHACLSin()

__STATIC_INLINE int_fast32_t readMATHACLSin

(

void

)

Reads and scales the MATHACL register with sine result.

Returns

Sine of the angle

References GLOBAL_IQ.

Referenced by MC_SinCos(), and sinCosMATHACLCompute().

readMATHACLCos()

__STATIC_INLINE int_fast32_t readMATHACLCos

(

void

)

Reads and scales the MATHACL register with cosine result.

Returns

Cosine of the angle

References arcTan2(), cosine(), cosine_LowPriority(), GLOBAL_IQ, sine(), and sine_LowPrioirty().

Referenced by MC_SinCos(), and sinCosMATHACLCompute().

sine_LowPrioirty()

int32_t sine_LowPrioirty

(

int32_t

orig_angle

)

sine of angle

Parameters

[in]

orig_angle

Angle input in pu

Returns

Sine of the angle

Referenced by readMATHACLCos().

sine()

int_fast32_t sine

(

int32_t

orig_angle

)

sine of angle

Parameters

[in]

orig_angle

Angle input in pu

Returns

Sine of the angle

Referenced by readMATHACLCos(), and sinCosMATHACLCompute().

cosine()

int_fast32_t cosine

(

int32_t

orig_angle

)

cosine of angle

Parameters

[in]

orig_angle

Angle input in pu

Returns

Cosine of the angle

Referenced by readMATHACLCos(), and sinCosMATHACLCompute().

arcTan2()

int_fast32_t arcTan2	(	int_fast32_t	iqNInputX,
		int_fast32_t	iqNInputY
	)

Finds tan inverse angle.

Parameters

[in]	iqNInputX	Cosine value of angle
[in]	iqNInputY	Sine value of angle

Returns

Tan inverse angle

References _IQdiv_mathacl, and GLOBAL_IQ.

Referenced by readMATHACLCos().