Chuanshuoge: tinkercat timer interrupt measure pulse duration

Tuesday, May 31, 2022

press and release button, button hold duration is displayed

int period;

void setup()

{

pinMode(7, INPUT_PULLUP);

PCICR = 0b00000100; //enable pin change interrupt on group 3

PCMSK2 = 0b10000000; //enable pin change interrupt on pin 7

TCCR1A = 0b00000000; //TCCR1A bit 0, 1 and TCCR1B bit 3, 4 set timer mode

TCCR1B = 0b00000101; //Set mode to be normal. set scaler to be clock/1024

sei();

Serial.begin(9600);

}

ISR (PCINT2_vect){

if(digitalRead(7)){

period = TCNT1 *0.0000625*1024;

Serial.print("button press periord:");

Serial.println(period);

}

else{

TCNT1 = 0;

}

void loop()

{

}

reference:

Chuanshuoge