Új hozzászólás Aktív témák

• #1071 tibi-d tag mdraco #1051

  Új Válasz 2015-06-14 17:57:45 #1071

  Új hozzászólás

  Összes hozzászólása itt Válaszok az összes hozzászólására itt Válaszok erre a hozzászólásra

  Privát üzenet küldése

  

  tibi-d

  tag

  válasz mdraco #1051 üzenetére

  Szia!
  Itt a kód, amit az Arduino.cc "learning" oldaláról ollóztam.

  State change detection (edge detection)

  Often, you don't need to know the state of a digital input all the time,
  but you just need to know when the input changes from one state to another.
  For example, you want to know when a button goes from OFF to ON. This is called
  state change detection, or edge detection.

  This example shows how to detect when a button or button changes from off to on
  and on to off.

  The circuit:
  * pushbutton attached to pin 2 from +5V
  * 10K resistor attached to pin 2 from ground
  * LED attached from pin 13 to ground (or use the built-in LED on
  most Arduino boards)

  created 27 Sep 2005
  modified 30 Aug 2011
  by Tom Igoe

  This example code is in the public domain.

  http://arduino.cc/en/Tutorial/ButtonStateChange

  */

  // this constant won't change:
  const int buttonPin = 2; // the pin that the pushbutton is attached to
  const int ledPin = 13; // the pin that the LED is attached to

  // Variables will change:
  int buttonPushCounter = 0; // counter for the number of button presses
  int buttonState = 0; // current state of the button
  int lastButtonState = 0; // previous state of the button

  void setup() {
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT);
  // initialize the LED as an output:
  pinMode(ledPin, OUTPUT);
  // initialize serial communication:
  Serial.begin(9600);
  }

  void loop() {
  // read the pushbutton input pin:
  buttonState = digitalRead(buttonPin);

  // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
  // if the state has changed, increment the counter
  if (buttonState == HIGH) {
  // if the current state is HIGH then the button
  // wend from off to on:
  buttonPushCounter++;
  Serial.println("on");
  Serial.print("number of button pushes: ");
  Serial.println(buttonPushCounter);
  }
  else {
  // if the current state is LOW then the button
  // wend from on to off:
  Serial.println("off");
  }
  }
  // save the current state as the last state,
  //for next time through the loop
  lastButtonState = buttonState;

  // turns on the LED every four button pushes by
  // checking the modulo of the button push counter.
  // the modulo function gives you the remainder of
  // the division of two numbers:
  if (buttonPushCounter % 4 == 0) {
  digitalWrite(ledPin, HIGH);
  } else {
  digitalWrite(ledPin, LOW);
  }

  }
  Természetesen úgy alakítod, ahogy neked megfelel.

Új hozzászólás Aktív témák