/**
 *
 *  IRDEKODER.cpp
 *  Jan Dvorak z Vozerovic - dvorkaman@centrum.cz - dvorkaman.php5.cz
 */   
 
#ifndef irdekoder_cpp
#define irdekoder_cpp

#include "WProgram.h"
#include "irdekoder.h"

/***************************************************
/**
 * Constructor
 * @param int input pin 
 */
 IrDekoder::IrDekoder(int pin)
 {
    inputPin=pin;    
    
    init();
 }
 
/***************************************************
/**
 * Inicialize input pin, implicit values
 * PRIVATE 
 */
 inline void IrDekoder::init()
 {
    pinMode(inputPin,INPUT);    
 }

/***************************************************
/**
 *  Indication of recieved data - data and negated data 
 */ 
 boolean IrDekoder::recievedData()
 {
   if( recieveData() )
   {
     data1=data; //save original data     
          
     i=0;
     while( !recieveData() )
     {
       i=i+1;
       if( i>10000 )return false;       
     }           
     
     data2=data; //save negated data
     data=data1; //restore 
     
     //check data   first five are same,   others negated
     if( (data1 ^ data2)!=1023 )return false;    
    
     //success
     return true;
     
   }else return false; 
 }

 
/***************************************************
/**
 * Recieve - decode data from IR pin
 * PRIVATE
 */ 
 boolean IrDekoder::recieveData()
 {
   d=digitalRead(inputPin);
   if( d==1 ) return false; //no data
   
   //dekod code
   recieved=0; //0 bit-in yet
   time1=micros(); //actual clock time
   
   data=0; //clear register
      
   while(true)
   {
     d2=digitalRead(inputPin);    
     
     if( d2!=d ) 
     { //data-in changed
       d=d2; //move bit frame
     
       time2=micros();
       dt=time2-time1;
       time1=time2; //move time frame
         
       if( (recieved%2)==1 )
       {
          if( dt<1000 )i=0;
                  else i=1;
          data=data<<1;
          data+=i;                    
       }       
       recieved++;
      
     //check for T-out
     }else{
       if( micros()-time1>4000 ) break;      
     }
     
   }//END WHILE
      
   //
   return true;
 }

/***************************************************
/**
 * Print recieved data to Serial console
 */  
 void IrDekoder::printRecievedData()
 {
    Serial.print("SB");
    Serial.print(data,BIN);
    Serial.println(" ");   
 }

/***************************************************
/**
 * Get recieved data 
 * @returns int recieved data 
 */ 
int IrDekoder::getRecievedData()
{
  return data & 1023; //clear first 5 bits
}
 
#endif