MeIR.h

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#ifndef MeIR_h
#define MeIR_h
 
/* Includes ------------------------------------------------------------------*/
#include <stdint.h>
#include <stdbool.h>
#include <Arduino.h>
#include "MeConfig.h"
#ifdef ME_PORT_DEFINED
#include "MePort.h"
#endif // ME_PORT_DEFINED
 
#ifndef __AVR_ATmega32U4__
#define MARK  0
#define SPACE 1
#define NEC_BITS 32
 
#define USECPERTICK 50  // microseconds per clock interrupt tick
#define RAWBUF 100 // Length of raw duration buffer
 
typedef enum {ERROR = 0, SUCCESS = !ERROR} ErrorStatus;
 
#define NEC_HDR_MARK    9000
#define NEC_HDR_SPACE   4500
#define NEC_BIT_MARK    560
#define NEC_ONE_SPACE   1600
#define NEC_ZERO_SPACE  560
#define NEC_RPT_SPACE   2250
#define NEC_RPT_PERIOD  110000
 
 
// #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 5000//(_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
 
 
// Values for decode_type
#define NEC 1
#define SONY 2
#define RC5 3
#define RC6 4
#define DISH 5
#define SHARP 6
#define PANASONIC 7
#define JVC 8
#define SANYO 9
#define MITSUBISHI 10
#define SAMSUNG 11
#define LG 12
#define UNKNOWN -1
 
#define TOPBIT 0x80000000
 
 
#ifdef F_CPU
#define SYSCLOCK F_CPU     // main Arduino clock
#else
#define SYSCLOCK 16000000  // main Arduino clock
#endif
 
 
#define _GAP 5000 // Minimum map between transmissions
#define GAP_TICKS (_GAP/USECPERTICK)
 
 
#define TIMER_DISABLE_INTR   (TIMSK2 = 0)
#define TIMER_ENABLE_PWM     (TCCR2A |= _BV(COM2B1))
#define TIMER_DISABLE_PWM    (TCCR2A &= ~(_BV(COM2B1)))
#define TIMER_ENABLE_INTR    (TIMSK2 = _BV(OCIE2A))
#define TIMER_DISABLE_INTR   (TIMSK2 = 0)
#define TIMER_INTR_NAME      TIMER2_COMPA_vect
#define TIMER_CONFIG_KHZ(val) ({ \
  const uint8_t pwmval = F_CPU / 2000 / (val); \
  TCCR2A = _BV(WGM20); \
  TCCR2B = _BV(WGM22) | _BV(CS20); \
  OCR2A = pwmval; \
  OCR2B = pwmval / 3; \
})
 
#define TIMER_COUNT_TOP      (SYSCLOCK * USECPERTICK / 1000000)
#if (TIMER_COUNT_TOP < 256)
#define TIMER_CONFIG_NORMAL() ({ \
  TCCR2A = _BV(WGM21); \
  TCCR2B = _BV(CS20); \
  OCR2A = TIMER_COUNT_TOP; \
  TCNT2 = 0; \
})
#else
#define TIMER_CONFIG_NORMAL() ({ \
  TCCR2A = _BV(WGM21); \
  TCCR2B = _BV(CS21); \
  OCR2A = TIMER_COUNT_TOP / 8; \
  TCNT2 = 0; \
})
#endif
 
// information for the interrupt handler
typedef struct {
  uint8_t recvpin;           // pin for IR data from detector
  volatile uint8_t rcvstate;          // state machine
  volatile uint32_t lastTime;
  unsigned int timer;     // 
  volatile uint8_t rawbuf[RAWBUF]; // raw data
  volatile uint8_t rawlen;         // counter of entries in rawbuf
} 
irparams_t;
 
// main class for receiving IR
class MeIR
{
public:
  MeIR();
 
  ErrorStatus decode();
  
  void begin();
 
  void end();
  
  void loop();
  
  boolean keyPressed(unsigned char r);
  // void resume();
 
  int8_t decode_type; // NEC, SONY, RC5, UNKNOWN
  unsigned long value; // Decoded value
  uint8_t bits; // Number of bits in decoded value
  volatile uint8_t *rawbuf; // Raw intervals in .5 us ticks
  int rawlen; // Number of records in rawbuf.
  
  String getString();
  
  unsigned char getCode();
  
  void sendString(String s);
  
  void sendString(float v);
  
  void sendNEC(unsigned long data, int nbits);
  
  void sendRaw(unsigned int buf[], int len, uint8_t hz);
  
  void enableIROut(uint8_t khz);
  
  void enableIRIn();
  
  void mark(uint16_t us);
  
  void space(uint16_t us);
 
private:
  // These are called by decode
  ErrorStatus decodeNEC();
  
  int16_t irIndex;  
  char irRead;
  char floatString[5];
  boolean irReady;
  boolean irPressed;
  String irBuffer;
  String Pre_Str;
  double irDelayTime;
};
#endif // !__AVR_ATmega32U4__
#endif