// MACRO-START * MACRO-START * MACRO-START * MACRO-START * MACRO-START * MACRO-START *
// a detailed explanation how these macros work is given in this tutorial
// https://forum.arduino.cc/t/comfortable-serial-debug-output-short-to-write-fixed-text-name-and-content-of-any-variable-code-example/888298

#define dbg(myFixedText, variableName) \
  Serial.print( F(#myFixedText " "  #variableName"=") ); \
  Serial.println(variableName);

#define dbgi(myFixedText, variableName,timeInterval) \
  { \
    static unsigned long intervalStartTime; \
    if ( millis() - intervalStartTime >= timeInterval ){ \
      intervalStartTime = millis(); \
      Serial.print( F(#myFixedText " "  #variableName"=") ); \
      Serial.println(variableName); \
    } \
  }

#define dbgc(myFixedText, variableName) \
  { \
    static long lastState; \
    if ( lastState != variableName ){ \
      Serial.print( F(#myFixedText " "  #variableName" changed from ") ); \
      Serial.print(lastState); \
      Serial.print( F(" to ") ); \
      Serial.println(variableName); \
      lastState = variableName; \
    } \
  }

#define dbgcf(myFixedText, variableName) \
  { \
    static float lastState; \
    if ( lastState != variableName ){ \
      Serial.print( F(#myFixedText " "  #variableName" changed from ") ); \
      Serial.print(lastState); \
      Serial.print( F(" to ") ); \
      Serial.println(variableName); \
      lastState = variableName; \
    } \
  }
// MACRO-END * MACRO-END * MACRO-END * MACRO-END * MACRO-END * MACRO-END * MACRO-END *

int a = 2;
int b = 3;
int k;
int v;
int pp = 9;
int d = 10;
int pos = 0;
int angle;


void setup() {

  Serial.begin(9600);
  pinMode(a, INPUT);
  pinMode(b, INPUT);
  pinMode(pp, OUTPUT);
  pinMode(d, OUTPUT);
}

void loop() {

  k = digitalRead(a);
  v = digitalRead(b);
  // only if value of variable "k" CHANGED print once
  dbgc("ToL01",k);
  // only if value of variable "v" CHANGED print once
  dbgc("ToL02",v);


  // print value of variable "k" once every 1000 milliseconds
  //dbgi("ToL0A", k, 1000);
  // print value of variable "v" once every 1000 milliseconds
  //dbgi("ToL0A", v, 1000);

  if (k > v) {
    pos++;
    //Serial.println("clk=");
    angle = pos;
    //Serial.print(pos);
  }
  else if (v > k) {
    pos--;
    //Serial.println("anticlk=");
    angle = pos;
    //Serial.print(pos);
  }
  else {
    pos = 0;
    //Serial.print("no rotation=");
    angle = pos;
    //Serial.print(pos);
  }

  dbgc("03",pos);
  //dbgi("0C", pos, 1000);
  angle = map(angle, 0, 8192, 0, 360);

  dbgc("04",angle);
  //dbgi("0D", angle, 1000);
}