speeduino-doxygen/crank_maths_8h_source.html

#ifndef CRANKMATHS_H

#define CRANKMATHS_H


#include "maths.h"

#include "board_definition.h"


static constexpr uint32_t MICROS_PER_DEG_1_RPM = UDIV_ROUND_CLOSEST(MICROS_PER_MIN, 360UL, uint32_t);


static constexpr uint16_t MAX_RPM = 18000U;


static constexpr uint16_t MIN_RPM = (uint16_t)UDIV_ROUND_UP(MICROS_PER_DEG_1_RPM, (uint32_t)UINT16_MAX/16UL, uint32_t);


static constexpr uint16_t MIN_REVOLUTION_TIME = MICROS_PER_MIN/MAX_RPM;


static constexpr uint32_t MAX_REVOLUTION_TIME = MICROS_PER_MIN/MIN_RPM;


extern int16_t CRANK_ANGLE_MAX_IGN;

extern int16_t CRANK_ANGLE_MAX_INJ;


static inline int16_t ignitionLimits(int16_t angle) {

    return nudge(0, CRANK_ANGLE_MAX_IGN-1, angle, CRANK_ANGLE_MAX_IGN);

}


void setAngleConverterRevolutionTime(uint32_t revolutionTime) noexcept;


uint32_t angleToTime(uint16_t angle) noexcept;


COMPARE_TYPE angleToTimerTicks(uint16_t angle) noexcept;


uint16_t timeToAngle(uint32_t time) noexcept;


#endif

COMPARE_TYPE
uint16_t COMPARE_TYPE
The timer overflow type.
Definition board_avr2560.h:32

board_definition.h
Inclusion of board specific header files and board related definitions.

MICROS_PER_DEG_1_RPM
static constexpr uint32_t MICROS_PER_DEG_1_RPM
At 1 RPM, each degree of angular rotation takes this many microseconds.
Definition crankMaths.h:15

CRANK_ANGLE_MAX_IGN
int16_t CRANK_ANGLE_MAX_IGN
The number of crank degrees that the system tracks ignition over.
Definition crankMaths.cpp:14

timeToAngle
uint16_t timeToAngle(uint32_t time) noexcept
Converts a time interval in microsecods to the equivalent degrees of angular (crank) rotation at curr...

angleToTimerTicks
COMPARE_TYPE angleToTimerTicks(uint16_t angle) noexcept
Converts angular degrees to the equivalent timer ticks at current RPM.

ignitionLimits
static int16_t ignitionLimits(int16_t angle)
Makes one pass at nudging the angle to within [0,CRANK_ANGLE_MAX_IGN].
Definition crankMaths.h:54

CRANK_ANGLE_MAX_INJ
int16_t CRANK_ANGLE_MAX_INJ
The number of crank degrees that the system tracks fuel injection over.
Definition crankMaths.cpp:15

MAX_REVOLUTION_TIME
static constexpr uint32_t MAX_REVOLUTION_TIME
Maximum time in µS that one crank revolution can take.
Definition crankMaths.h:43

angleToTime
uint32_t angleToTime(uint16_t angle) noexcept
Converts angular degrees to the time interval that amount of rotation will take at current RPM.

MAX_RPM
static constexpr uint16_t MAX_RPM
The maximum rpm that the ECU will attempt to run at.
Definition crankMaths.h:22

setAngleConverterRevolutionTime
void setAngleConverterRevolutionTime(uint32_t revolutionTime) noexcept
Set the revolution time, from which some of the degree<-->angle conversions are derived.
Definition crankMaths.cpp:34

MIN_REVOLUTION_TIME
static constexpr uint16_t MIN_REVOLUTION_TIME
Minimum time in µS that one crank revolution can take.
Definition crankMaths.h:36

MIN_RPM
static constexpr uint16_t MIN_RPM
Absolute minimum RPM that the crank math (& therefore all of Speeduino) can be used with.
Definition crankMaths.h:29

UDIV_ROUND_UP
#define UDIV_ROUND_UP(n, d, t)
Rounding up unsigned integer division.
Definition maths.h:126

UDIV_ROUND_CLOSEST
#define UDIV_ROUND_CLOSEST(n, d, t)
Rounded unsigned integer division.
Definition maths.h:107

maths.h

MICROS_PER_MIN
static constexpr uint32_t MICROS_PER_MIN
Self-explanatory.
Definition maths.h:22

nudge
static int16_t nudge(int16_t min, int16_t max, int16_t value, int16_t nudgeAmount)
Make one pass at correcting the value into the range [min, max)
Definition maths.h:351

array
Definition array.h:14