//#include <TimerOne.h>
#include <IRremote.hpp>

// This example creates a PWM signal with 25 kHz carrier.
//
// Arduino's analogWrite() gives you PWM output, but no control over the
// carrier frequency.  The default frequency is low, typically 490 or
// 3920 Hz.  Sometimes you may need a faster carrier frequency.
//
// The specification for 4-wire PWM fans recommends a 25 kHz frequency
// and allows 21 to 28 kHz.  The default from analogWrite() might work
// with some fans, but to follow the specification we need 25 kHz.
//
// http://www.formfactors.org/developer/specs/REV1_2_Public.pdf
//
// Connect the PWM pin to the fan's control wire (usually blue).  The
// board's ground must be connected to the fan's ground, and the fan
// needs +12 volt power from the computer or a separate power supply.

#define PWM_FREQ 40   // 1/25000Hz = 40us
#define IR_RECEIVE_PIN 2   // Signal Pin of IR receiver
const int PIN_PWM_FAN = 9;

void setup(void) {
  IrReceiver.begin(IR_RECEIVE_PIN);
  //timer1Init();
  //Timer1.initialize(PWM_FREQ);  // 40 us = 25 kHz
  Serial.begin(115200);
  uint16_t c = (F_CPU/100000 * PWM_FREQ) / 20;
  Serial.println(c);
  //Serial.println(TIMER1_A_PIN);
}

void timer1Init() {
    TCCR1B = _BV(WGM13);    // set mode as phase and frequency correct pwm, stop the timer
	  TCCR1A = 0;             // clear control register A
    ICR1 = (F_CPU/100000 * PWM_FREQ) / 20;
	  TCCR1B = _BV(WGM13) | _BV(CS10);
    pinMode(PIN_PWM_FAN, OUTPUT); // set pin 9 as output
    TCCR1A |= _BV(COM1A1);
}

void setDutyPercent(uint8_t dc) {
    uint32_t dutyCycle = ICR1 * ((dc / 100.0) * 1023);
	  //dutyCycle *= dc;
	  OCR1A = dutyCycle >> 10;
    //Timer1.pwm(PIN_PWM_FAN, (dc / 100.0) * 1023);
}

void loop(void) {
    uint8_t command = 0;
    // Checks received an IR signal
    if (IrReceiver.decode()) {
        command = IrReceiver.decodedIRData.command;
        //translateIR();
        Serial.println(command);
        IrReceiver.resume();  // Receive the next value
    }
  // slowly increase the PWM fan speed
  //
  /*for (uint8_t dutyCycle = 30; dutyCycle < 100; dutyCycle++) {
    Serial.print("PWM Fan, Duty Cycle = ");
    Serial.println(dutyCycle);
    setDutyPercent(dutyCycle);
    delay(100);
  }*/
 
}