crankMaths.cpp File Reference

#include <avr-fast-shift.h>
#include "globals.h"
#include "crankMaths.h"
#include "preprocessor.h"

Macros
#define	SECOND_DERIV_ENABLED   0

Typedefs
typedef uint32_t	UQ24X8_t

Functions
angle_converter_factors_t	calculateAngleConverterFactors (uint32_t revolutionTime) noexcept
	Calculate the angle<-->time conversion factors for a crank revolution time.
void	applyAngleConverterFactors (const angle_converter_factors_t &factors) noexcept
	Set the factors used by the degree<-->angle conversions.
void	setAngleConverterRevolutionTime (uint32_t revolutionTime) noexcept
	Set the revolution time, from which some of the degree<-->angle conversions are derived.
	BEGIN_LTO_ALWAYS_INLINE (uint32_t) angleToTime(uint16_t angle) noexcept
	BEGIN_LTO_ALWAYS_INLINE (COMPARE_TYPE) angleToTimerTicks(uint16_t angle) noexcept

Variables
int16_t	CRANK_ANGLE_MAX_IGN = 360
	The number of crank degrees that the system tracks ignition over.
int16_t	CRANK_ANGLE_MAX_INJ = 360
	The number of crank degrees that the system tracks fuel injection over.
static constexpr uint8_t	UQ24X8_Shift = 8U
static constexpr uint8_t	microsPerDegree_Shift = UQ24X8_Shift
static constexpr uint8_t	UQ1X15_Shift = 15U
static constexpr uint8_t	degreesPerMicro_Shift = UQ1X15_Shift
static angle_converter_factors_t	angleConverterFactors
	The factors used by the angle<->time conversion functions.

Macro Definition Documentation

SECOND_DERIV_ENABLED

#define SECOND_DERIV_ENABLED   0

Typedef Documentation

UQ24X8_t

typedef uint32_t UQ24X8_t

Function Documentation

applyAngleConverterFactors()

void applyAngleConverterFactors ( const angle_converter_factors_t &  factors )

noexcept

Set the factors used by the degree<-->angle conversions.

Note

If an ISR could be converting angles, call this from within an ATOMIC() block.

Parameters

factors

The factors to use. See calculateAngleConverterFactors()

BEGIN_LTO_ALWAYS_INLINE() [1/2]

BEGIN_LTO_ALWAYS_INLINE ( COMPARE_TYPE  )

noexcept

BEGIN_LTO_ALWAYS_INLINE() [2/2]

BEGIN_LTO_ALWAYS_INLINE ( uint32_t  )

noexcept

calculateAngleConverterFactors()

angle_converter_factors_t calculateAngleConverterFactors ( uint32_t  revolutionTime )

noexcept

Calculate the angle<-->time conversion factors for a crank revolution time.

This does not change the factors in use (see applyAngleConverterFactors()), so the (relatively slow) divisions can be done outside of a critical section.

Parameters

revolutionTime

The crank revolution time in uS. Zero results in zero factors.

setAngleConverterRevolutionTime()

void setAngleConverterRevolutionTime ( uint32_t  revolutionTime )

noexcept

Set the revolution time, from which some of the degree<-->angle conversions are derived.

Shorthand for applyAngleConverterFactors(calculateAngleConverterFactors(revolutionTime))

Parameters

revolutionTime

The crank revolution time.

Variable Documentation

angleConverterFactors

angle_converter_factors_t angleConverterFactors

static

The factors used by the angle<->time conversion functions.

CRANK_ANGLE_MAX_IGN

int16_t CRANK_ANGLE_MAX_IGN = 360

The number of crank degrees that the system tracks ignition over.

CRANK_ANGLE_MAX_INJ

int16_t CRANK_ANGLE_MAX_INJ = 360

The number of crank degrees that the system tracks fuel injection over.

degreesPerMicro_Shift

constexpr uint8_t degreesPerMicro_Shift = UQ1X15_Shift

staticconstexpr

microsPerDegree_Shift

constexpr uint8_t microsPerDegree_Shift = UQ24X8_Shift

staticconstexpr

UQ1X15_Shift

constexpr uint8_t UQ1X15_Shift = 15U

staticconstexpr

UQ24X8_Shift

constexpr uint8_t UQ24X8_Shift = 8U

staticconstexpr