/* KY-040 Rotary Encoder Counter

   Rotate clockwise to count up, counterclockwise to counter done.

   Press to reset the counter.

   Copyright (C) 2021, Uri Shaked
*/

#include <TM1637.h>

#define ENCODER_CLK 32  
#define ENCODER_DT  33  
#define ENCODER_SW  25  

TM1637 tm;

// Nilai counter
volatile int number = 0;

void setup() {
  tm.begin(2, 4, 4);      // clockpin, datapin, jumlah digit
  tm.displayClear();
  tm.setBrightness(7);    // 1 s/d 7 | 1=mati, 7=paling terang


  tm.displayInt(number);  
  // Initialize encoder pins
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(ENCODER_SW, INPUT_PULLUP);

  
  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, FALLING);
}

void readEncoder() {
  int dtValue = digitalRead(ENCODER_DT);
  
  
  if (dtValue == HIGH) {
    number++;  // Clockwise
  } else {
    number--;  // Counterclockwise
  }

  
  if (number < 0) number = 0;
  if (number > 9999) number = 9999;
}

// Get the counter value, disabling interrupts.
// This make sure readEncoder() doesn't change the value
// while we're reading it.
int getCounter() {
  int result;
  noInterrupts();
  result = number;
  interrupts();
  return result;
}

void loop() {
  tm.displayInt(getCounter());

  
  delay(50);
}