speeduino/decoders.h

volatile unsigned long curTime;
volatile unsigned int curGap;
volatile unsigned int targetGap; 

volatile int toothCurrentCount = 0; //The current number of teeth (Onec sync has been achieved, this can never actually be 0
volatile unsigned long toothLastToothTime = 0; //The time (micros()) that the last tooth was registered
volatile unsigned long toothLastMinusOneToothTime = 0; //The time (micros()) that the tooth before the last tooth was registered
volatile unsigned long toothOneTime = 0; //The time (micros()) that tooth 1 last triggered
volatile unsigned long toothOneMinusOneTime = 0; //The 2nd to last time (micros()) that tooth 1 last triggered
volatile int toothHistory[512];
volatile int toothHistoryIndex = 0;

volatile int triggerActualTeeth;
unsigned int triggerFilterTime; // The shortest time (in uS) that pulses will be accepted (Used for debounce filtering)
unsigned int triggerToothAngle; //The number of crank degrees that elapse per tooth
unsigned long revolutionTime; //The time in uS that one revolution would take at current speed (The time tooth 1 was last seen, minus the time it was seen prior to that)