// encoder tester by jikun

#include <TM1637Display.h>
#define CLK 4
#define DIO 5

TM1637Display display = TM1637Display(CLK, DIO);
long temp, counter = 0;

const uint8_t halo[] = {
  SEG_F | SEG_E | SEG_G | SEG_B | SEG_C,
  SEG_F | SEG_E | SEG_A | SEG_B | SEG_C | SEG_G,
  SEG_F | SEG_E | SEG_D,
  SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F,
};

const uint8_t budy[] = {
  SEG_F | SEG_E | SEG_D | SEG_C | SEG_G,
  SEG_C | SEG_D | SEG_E,
  SEG_B | SEG_C | SEG_D | SEG_E | SEG_G,
  SEG_F | SEG_G | SEG_B | SEG_C | SEG_D,
};

void setup() {
  Serial.begin(9600);
  display.setBrightness(7);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);

  attachInterrupt(0, forward, RISING);
  attachInterrupt(1, backward, RISING);

  display.setSegments(halo);
  delay(1000);
  display.setSegments(budy);
  delay(1000);
  display.showNumberDec(0);
}

void resetCounter() {
  noInterrupts();
  counter = 0;
  interrupts();
}

void loop() {
  if (counter != temp) {
    display.showNumberDec(counter);
    temp = counter;
    Serial.println(counter);
  }
  if (digitalRead(6) == LOW) {
    resetCounter();
  }
}

void forward() {
  if (digitalRead(3) == LOW) {
    counter++;
  }
  else {
    counter--;
  }
}

void backward() {
  if (digitalRead(2) == LOW) {
    counter--;
  }
  else {
    counter++;
  }
}