control pins independently without delay()

Forum 2005-2010 (read only) General Frequently-Asked Questions
8

Untested

#define buttonPin 2 //button attached to pin 2
#define event1 13 //ssr to be connected to pin 9 for lights

int buttonState = 0;//variable to store the state of button
unsigned long eventtime1 = 0;//clock value to be stored at the time milli() is called

void setup()
{
  pinMode(buttonPin, INPUT);
  pinMode(event1, OUTPUT);
}

void loop()
{
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:

  if (buttonState == HIGH && eventtime1 == 0)//when button is pushed...
  {
    eventtime1 = millis() + 500; //Now, plus 500ms
    digitalWrite(event1, HIGH); //turn on pin 13
  }

  if ((millis() >= eventtime1) && (eventtime1 != 0))
  {
    eventtime1 = 0;
    digitalWrite(event1, LOW); //turn off pin 1
  }
}

Shorter still untested

#define buttonPin 2 //button attached to pin 2
#define event1 13 //ssr to be connected to pin 9 for lights

unsigned long eventtime1 = 0; //clock value to be stored at the time milli() is called

void setup()
{
  pinMode(buttonPin, INPUT);
  pinMode(event1, OUTPUT);
}

void loop()
{
  if (digitalRead(buttonPin) == HIGH && eventtime1 == 0)//If button is pushed, and eventtime1 is 0 then...
  {
    eventtime1 = millis() + 500; //Set eventtime1 to now + 500ms
    digitalWrite(event1, HIGH); //turn on event1 pin
  }

  if ((millis() >= eventtime1) && (eventtime1 != 0)) //If eventtime1 is now or later than now, and eventtime1 isn't 0, then...
  {
    eventtime1 = 0;
    digitalWrite(event1, LOW); //turn off event1 pin
  }
}

Another untested

#define buttonPin 2 //button attached to pin 2
#define event1 13 //ssr to be connected to pin 9 for lights

unsigned long eventtime1 = 0; //clock value to be stored at the time milli() is called

void setup()
{
  pinMode(event1, OUTPUT);
  attachInterrupt(0, btnDown, RISING); //0 = digital pin 2 or 1 = digital pin 3
}

void loop()
{
  if ((millis() >= eventtime1) && (eventtime1 != 0)) //If eventtime1 is now or later than now, and eventtime1 isn't 0, then...
  {
    eventtime1 = 0;
    digitalWrite(event1, LOW); //turn off event1 pin
  }
}

void btnDown()
{
  if (eventtime1 != 0) return;
  eventtime1 = millis() + 500; //Set eventtime1 to now + 500ms
  digitalWrite(event1, HIGH); //turn on event1 pin
}

Last untested

#define buttonPin 2 //button attached to pin 2
#define event1 13 //ssr to be connected to pin 9 for lights

unsigned long eventtime1 = 0; //clock value to be stored at the time milli() is called

void setup()
{
  pinMode(event1, OUTPUT);
  attachInterrupt(0, btnDown, RISING); //0 = digital pin 2 or 1 = digital pin 3
}

void loop()
{
  if ((millis() - eventtime1 >= 500) && (eventtime1 != 0)) //If eventtime1 is now or later than now, and eventtime1 isn't 0, then...
  {
    eventtime1 = 0;
    digitalWrite(event1, LOW); //turn off event1 pin
  }
}

void btnDown()
{
  if (eventtime1 != 0) return;
  eventtime1 = millis(); //Set eventtime1 to now + 500ms
  digitalWrite(event1, HIGH); //turn on event1 pin
}

They should all do the same (if they work at all), just different ways of doing it.