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Copy edited (e.g. ref. <http://arduino.cc/en/Main/ArduinoBoardUno>, <https://en.wiktionary.org/wiki/interrupt#Noun>, <https://en.wiktionary.org/wiki/tried#Verb>, and <https://en.wikipedia.org/wiki/Hertz>). . Made the code comments consistent (leaving actual code untouched).

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edit approved Jan 14, 2020 at 14:25

Peter Mortensen

Using timer0 on arduino unoArduino Uno

I am trying to find a simple timer0 intrerruptinterrupt example, but none of those work, neither. Neither this code which i tryedI tried to run:

boolean toggle0 =0;

void setup() {
pinMode(8, OUTPUT);
  cli(); 

  //set Set timer1 interrupt at 1Hz1 Hz
  TCCR1A = 0; // setSet entire TCCR1A register to 0
  TCCR1B = 0; // sameSame for TCCR1B
  TCNT1  = 0; //initialize Initialize counter value to 0 

  // setSet compare match register for 1hz1 Hz increments
  OCR1A = 15624;// = (16*10^6) / (1*1024) - 1 (must be <65536) 

  // turnTurn on CTC mode
  TCCR1B |= (1 << WGM12); 

  // Set CS12 and CS10 bits for 1024 prescaler
  TCCR1B |= (1 << CS12) | (1 << CS10);   

  // enableEnable timer compare interrupt
  TIMSK1 |= (1 << OCIE1A);

  sei();
}

ISR(TIMER0_COMPA_vect){  //change Change the 0 to 1 for timer1 and 2 for timer2
  if (toggle0){
    digitalWrite(8,HIGH);
    toggle0 = 0;
  }
  else{
    digitalWrite(8,LOW);
    toggle0 = 1;
  }
}

void loop() {

}

whatWhat am iI doing wrong?

Using timer0 on arduino uno

I am trying to find a simple timer0 intrerrupt example but none of those work, neither this code which i tryed to run:

boolean toggle0 =0;

void setup() {
pinMode(8, OUTPUT);
  cli();
//set timer1 interrupt at 1Hz
  TCCR1A = 0;// set entire TCCR1A register to 0
  TCCR1B = 0;// same for TCCR1B
  TCNT1  = 0;//initialize counter value to 0
  // set compare match register for 1hz increments
  OCR1A = 15624;// = (16*10^6) / (1*1024) - 1 (must be <65536)
  // turn on CTC mode
  TCCR1B |= (1 << WGM12);
  // Set CS12 and CS10 bits for 1024 prescaler
  TCCR1B |= (1 << CS12) | (1 << CS10);  
  // enable timer compare interrupt
  TIMSK1 |= (1 << OCIE1A);

  sei();
}

ISR(TIMER0_COMPA_vect){  //change the 0 to 1 for timer1 and 2 for timer2
  if (toggle0){
    digitalWrite(8,HIGH);
    toggle0 = 0;
  }
  else{
    digitalWrite(8,LOW);
    toggle0 = 1;
  }
}

void loop() {

}

what am i doing wrong?

Using timer0 on Arduino Uno

I am trying to find a simple timer0 interrupt example, but none of those work. Neither this code which I tried to run:

boolean toggle0 =0;

void setup() {
pinMode(8, OUTPUT);
  cli(); 

  // Set timer1 interrupt at 1 Hz
  TCCR1A = 0; // Set entire TCCR1A register to 0
  TCCR1B = 0; // Same for TCCR1B
  TCNT1  = 0; // Initialize counter value to 0 

  // Set compare match register for 1 Hz increments
  OCR1A = 15624;// = (16*10^6) / (1*1024) - 1 (must be <65536) 

  // Turn on CTC mode
  TCCR1B |= (1 << WGM12); 

  // Set CS12 and CS10 bits for 1024 prescaler
  TCCR1B |= (1 << CS12) | (1 << CS10); 

  // Enable timer compare interrupt
  TIMSK1 |= (1 << OCIE1A);

  sei();
}

ISR(TIMER0_COMPA_vect){  // Change the 0 to 1 for timer1 and 2 for timer2
  if (toggle0){
    digitalWrite(8,HIGH);
    toggle0 = 0;
  }
  else{
    digitalWrite(8,LOW);
    toggle0 = 1;
  }
}

void loop() {

}

What am I doing wrong?

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asked Dec 12, 2016 at 21:03

adrya407

Using timer0 on arduino uno

I am trying to find a simple timer0 intrerrupt example but none of those work, neither this code which i tryed to run:

boolean toggle0 =0;

void setup() {
pinMode(8, OUTPUT);
  cli();
//set timer1 interrupt at 1Hz
  TCCR1A = 0;// set entire TCCR1A register to 0
  TCCR1B = 0;// same for TCCR1B
  TCNT1  = 0;//initialize counter value to 0
  // set compare match register for 1hz increments
  OCR1A = 15624;// = (16*10^6) / (1*1024) - 1 (must be <65536)
  // turn on CTC mode
  TCCR1B |= (1 << WGM12);
  // Set CS12 and CS10 bits for 1024 prescaler
  TCCR1B |= (1 << CS12) | (1 << CS10);  
  // enable timer compare interrupt
  TIMSK1 |= (1 << OCIE1A);

  sei();
}

ISR(TIMER0_COMPA_vect){  //change the 0 to 1 for timer1 and 2 for timer2
  if (toggle0){
    digitalWrite(8,HIGH);
    toggle0 = 0;
  }
  else{
    digitalWrite(8,LOW);
    toggle0 = 1;
  }
}

void loop() {

}

what am i doing wrong?

arduino-uno timers