//#define F_CPU 8000000
#include <IRremote.h>
#include "PinChangeInt.h"

int pin;
int state;
unsigned long lastmillis = 0;
unsigned long lastmillis_wake = 0;
int wTime;
#define pinD2   2     //set all the pins as interrupts with the PinChangeInt library
#define pinD4   4
#define pinD5   5
#define pinD6   6
#define pinD7   7
#define IND_LED 8
#define pinD9   9
#define pinD10  10
#define pinD11  11
#define pinD12  12
#define pinD13  13
#define pinA14  14
#define pinA15  15
#define pinA16  16
#define pinA17  17
#define pinA18  18
#define pinA19  19

IRsend irsend;

void setup() {
  //  Serial.begin(9600);

  //  OSCCAL = 0xC8;

  for (int i = 0; i < 20; i++) {  //set all pins high to reduce current consumption, and because they are needed high anyway.
    pinMode(i, INPUT_PULLUP);
  }

  ADCSRA &= ~(1 << 7); //ADC is not needed, disable it to save power.
  MCUCR |= (3 << 5); //BOD disable - set both BODS and BODSE at the same time
  MCUCR = (MCUCR & ~(1 << 5)) | (1 << 6); //then set the BODS bit and clear the BODSE bit at the same time.

  attachPinChangeInterrupt(pinD2, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD4, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD5, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD6, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD7, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD9, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD10, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD11, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD12, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinD13, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinA14, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinA15, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinA16, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinA17, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinA18, digitalInterrupt, FALLING);
  attachPinChangeInterrupt(pinA19, digitalInterrupt, FALLING);

  pinMode(IND_LED, OUTPUT);
}
void digitalInterrupt() {
  (wTime++);
}
void loop() {

  if (pin >= 19) {  //iterate a pin each loop
    pin = 2;
  }
  else {
    pin++;
  }
  state = digitalRead(pin);

  if (pin == 2 && !state) {         //TV Channel Down
    irsend.sendNEC(0x20DF629D, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 4 && !state) {   //TV Channel Up
    irsend.sendNEC(0x20DFA25D, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 5 && !state) {   //Stereo Pwr
    irsend.sendNEC(0x7E8154AB, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 6 && !state) {   //Stereo_DVD
    irsend.sendNEC(0x5EA100FE, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 7 && !state) {   //Stereo_Vol_UP
    irsend.sendNEC(0x5EA158A7, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 9 && !state) {   //Stereo Mute
    irsend.sendNEC(0x5EA138C7, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 10 && !state) {   //Stereo_Input_Down
    irsend.sendNEC(0x5EA1C43A, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 11 && !state) {   //TV_Vol_Up
    irsend.sendNEC(0x20DF12ED, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 12 && !state) {   //TV_Vol_Down
    irsend.sendNEC(0x20DFE21D, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 13 && !state) {   //Stereo_Input_Up
    irsend.sendNEC(0x5EA1F806, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 14 && !state) {   //TV_Input
    irsend.sendNEC(0x20DFF40B, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 15 && !state) {   //TV_Power
    irsend.sendNEC(0x20DF10EF, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 16 && !state) {   //TV_HDMI
    irsend.sendNEC(0x20DF639C, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 17 && !state) {   //Stereo_Vol_Down
    irsend.sendNEC(0x5EA1D827, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);

  }
  else if (pin == 18 && !state) {   //TV_Guide
    irsend.sendNEC(0x20DF38C7, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }
  else if (pin == 19 && !state) {   //TV_Mute
    irsend.sendNEC(0x20DF906F, 32);
    digitalWrite(IND_LED, HIGH);
    delay(100);
  }

  if (millis() - lastmillis >= 100) {
    lastmillis = millis();
    digitalWrite(IND_LED, LOW);
  }
  if ((wTime > 0) && (millis() - lastmillis_wake >= 10000)) {  //amount of time the controller wakes up after a button press
    lastmillis_wake = millis();
    (wTime = 0);
  }

  if (!wTime) {
    digitalWrite(IND_LED, LOW); //make sure the LED is off
    //ENABLE SLEEP - this enables the sleep mode
    SMCR |= (1 << 2); //power down mode
    SMCR |= 1;//enable sleep
    __asm__ __volatile__("sleep");
  }
}