Encoder interrupt problem

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5

Thank you all for quick reply. I managed to solve problem.
Here is the code, maybe someone will find it helpful.

volatile int puls = 0;
long vrem = 0;
long pvrem = 0;
long psvrem = 0;
float brz = 0;
long svrem = 0;
void pc(){
  puls ++;
}
void setup(){
  attachInterrupt(0, pc, RISING);
  Serial.begin(9600);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  pvrem = millis();
  psvrem = millis();

}
void loop(){
  vrem = millis() - pvrem;
  svrem = millis() - psvrem;
  if ( vrem > 10){
    brz = (float) puls / vrem;
    pvrem = millis();
    puls = 0;
  }
  if ( svrem > 1000){
    Serial.print("Brzina: ");
    Serial.println(brz);
    psvrem = 0;
  }
}