Using interrupt RISING on arduino nano

Projects Programming
1 
const byte TrigPin = 2;            // M600 trigger pin number (input)
const byte EyePin = 3;             // Photocell pin number (input)
const byte BlowValve =  4;         // Blow valve pin number (out)
const byte BlowValveON = 13;       // LED in the nano indicating blow valve is ON 

volatile bool TriggerState = true;
volatile bool BoardDetected = true;


void setup() 
{
  // initialize digital pins and serial communication for troubleshooting.
  pinMode(TrigPin,INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(TrigPin), LabelRequested,FALLING);
  pinMode(EyePin,INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(EyePin), EyeTriggered,FALLING);
  attachInterrupt(digitalPinToInterrupt(EyePin), Reset,RISING);
  pinMode(BlowValve, OUTPUT);
  pinMode(BlowValveON, OUTPUT);
  Serial.begin(9600);
}


void loop()
{
  //TriggerState = digitalRead(TrigPin);   // M600 triggered latch
  //BoardDetected = digitalRead(EyePin);  // eye saw a board
  /*if (TriggerState == LOW) {
    if (BoardDetected == LOW) {
      delay(10);                          // delay depends on line speed
      digitalWrite(BlowValve, HIGH);
      digitalWrite(BlowValveON, HIGH);    // LED on the arduino
      delay(1000);                          // delay depends on line speed
      digitalWrite(BlowValve, LOW);
      digitalWrite(BlowValveON, LOW);    // LED on the arduino
      
      TriggerState = HIGH;
      BoardDetected = HIGH;
    }
  }
  */ 
     
     
  
      
  Serial.print("Trigger:");
  Serial.println(String(TriggerState));
  //Serial.print(F("Ndetection:"));
  //Serial.println(String(nDetection));
  //Serial.print("Board detected:");
  //Serial.println(BoardDetected);
 }

 void LabelRequested() {
  TriggerState = false;
 }

void EyeTriggered() {
  BoardDetected = false;
}

void Reset() {
  
    TriggerState = true;
 
}


the ISR on RISING doesn't work properly. 
the same routine is called when the pin goes from high to low (falling!)
any help is appreciated.
2

Your topic was MOVED to its current forum category which is more appropriate than the original as it has nothing to do with Installation and Troubleshooting of the IDE

3

Don't think you can attach an interrupt on both FALLING and RISING events, for the same pin.

You can attach on a CHANGE event, then in the interrupt check the pin value to determine whether it was RISING (now HIGH) or FALLING (now LOW).

1 Like
4

Makes sense, I will try this.
Thanks

5

It was a denouncing issue, I figured it out and out debouncing logic and it did work out
Thanks

6

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