Arduino_IRTinyHashInt.h

#define IRremoteint_h

#include <Arduino.h>

#define CLKFUDGE 5      // fudge factor for clock interrupt overhead
#define CLK 256      // max value for clock (timer 2)
#define PRESCALE 8      // timer2 clock prescale
#define SYSCLOCK 8000000  // main Arduino clock
#define CLKSPERUSEC (SYSCLOCK/PRESCALE/1000000)   // timer clocks per microsecond

#define ERR 0
#define DECODED 1

// defines for setting and clearing register bits
#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif
#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif

// clock timer reset value
#define INIT_TIMER_COUNT2 (CLK - USECPERTICK*CLKSPERUSEC + CLKFUDGE)
#define RESET_TIMER2 TCNT0 = INIT_TIMER_COUNT2

#define TOLERANCE 25  // percent tolerance in measurements
#define LTOL (1.0 - TOLERANCE/100.)
#define UTOL (1.0 + TOLERANCE/100.)

#define _GAP 5000 // Minimum map between transmissions
#define GAP_TICKS (_GAP/USECPERTICK)

#define TICKS_LOW(us) (int) (((us)*LTOL/USECPERTICK))
#define TICKS_HIGH(us) (int) (((us)*UTOL/USECPERTICK + 1))

// receiver states
#define STATE_IDLE     2
#define STATE_MARK     3
#define STATE_SPACE    4
#define STATE_STOP     5

// information for the interrupt handler
typedef struct {
  uint8_t recvpin;           // pin for IR data from detector
  uint8_t rcvstate;          // state machine
  unsigned int timer;     // state timer, counts 50uS ticks.
  unsigned int rawbuf[RAWBUF]; // raw data
  uint8_t rawlen;         // counter of entries in rawbuf
}
irparams_t;

// Defined in IRremote.cpp
extern volatile irparams_t irparams;

// IR detector output is active low
#define MARK  0
#define SPACE 1

#define TOPBIT 0x80000000