#include <IRremote.h>

//all IR codes of the remote
#define MENU       0x4FB906F
#define ZOOM       0x4FB9867
#define FREEZE     0x4FBE817
#define MODE       0x4FB02FD
#define ENTER      0x4FB8877
#define ARROWUP    0x4FBF807
#define ARROWDOWN  0x4FB6897
#define ARROWRIGHT 0x4FBA857
#define ARROWLEFT  0x4FBD827
#define MODE1      0x4FB32CD
#define MODE2      0x4FB20DF
#define MODE3      0x4FB00FF
#define MODE4      0x4FB50AF
#define MODE5      0x4FB7887
#define MODE6      0x4FB708F
#define MODE7      0x4FB58A7
#define CH1        0x4FB38C7
#define CH2        0x4FB28D7
#define CH3        0x4FBF00F
#define CH4        0x4FB30CF


//objekt for IR-Signal
IRsend irsend;

//Pin for RC-Control
int rcPin = 4;  
//compare pulse time for RC-On and RC-Off
int rcOn = 1150;          
//variable for edge detection
int rcEdge=0;

int state=0;


//returns 1 if rising edge and 2 if falling edge
int rcControl(){
  
  int pulse=pulseIn(rcPin, HIGH);
  
  if(!rcEdge&&pulse<rcOn&&pulse>700){
    rcEdge=1;
    return 1;   
  }
  if(rcEdge&&pulse>rcOn){
    rcEdge=0;
    return 2;
  }
  
  return 0;
    
}

//swap the two PIP channels
void swapPIP(){
  irsend.sendNEC(MENU, 56);
  delay(100);
  irsend.sendNEC(ARROWUP, 56);
  delay(100);
  irsend.sendNEC(ARROWUP, 56);
  delay(100);
  irsend.sendNEC(ARROWUP, 56);
  delay(100);
  irsend.sendNEC(MENU, 56);
  delay(100);
  irsend.sendNEC(MENU, 56);  
  delay(100);
}

//swap the two PIP channels back
void swapPIPback(){
  irsend.sendNEC(MENU, 56);
  delay(100);
  irsend.sendNEC(ARROWDOWN, 56);
  delay(100);
  irsend.sendNEC(ARROWDOWN, 56);
  delay(100);
  irsend.sendNEC(ARROWDOWN, 56);
  delay(100);
  irsend.sendNEC(MENU, 56);
  delay(100);
  irsend.sendNEC(MENU, 56);  
  delay(100);
}

//switch PIP-Mode ON
void pipON(){ 
  delay(100);
  irsend.sendNEC(MODE5, 56); 
  
}

//switch PIP-Mode OFF/switch to Channel 1
void pipOFF(){
  delay(100);
  irsend.sendNEC(CH1, 56);
}

//switch to Channel 2
void switchToCH2(){
  delay(100);
  irsend.sendNEC(CH2, 56);
}


void setup()
{
  delay(1500);
  //RC-Pin as input
  pinMode(rcPin, INPUT);
  
  //init PIP
  
  pipOFF();
  //pipON();
}

void loop() {
  
  int rc=rcControl();
  
  //action when RC Switch is turned ON
  if(rc==1){
   //do what you want 
  }
  //action when RC Switch is turned OFF  
   if(rc==2){
     switch(state){
       case 0: pipON();
               state=1;
               break;
       case 1: switchToCH2();
               state=2;
               break;
       case 2: pipOFF();
               state=0;
               break;
     }
  }
     
}