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Merge pull request #1192 from miek/debounce-fix

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Fix Debounce example to work as described
This commit is contained in:
Federico Vanzati 2013-04-16 01:22:31 -07:00
commit 97e0f34572
1 changed files with 18 additions and 4 deletions
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22
build/shared/examples/02.Digital/Debounce/Debounce.ino
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@ -19,6 +19,8 @@
by David A. Mellis
modified 30 Aug 2011
by Limor Fried
modified 28 Dec 2012
by Mike Walters
This example code is in the public domain.
@ -43,6 +45,9 @@ long debounceDelay = 50; // the debounce time; increase if the output flicker
void setup() {
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
// set initial LED state
digitalWrite(ledPin, ledState);
}
void loop() {
@ -62,11 +67,20 @@ void loop() {
if ((millis() - lastDebounceTime) > debounceDelay) {
// whatever the reading is at, it's been there for longer
// than the debounce delay, so take it as the actual current state:
buttonState = reading;
}
// set the LED using the state of the button:
digitalWrite(ledPin, buttonState);
// if the button state has changed:
if (reading != buttonState) {
buttonState = reading;
// only toggle the LED if the new button state is HIGH
if (buttonState == HIGH) {
ledState = !ledState;
// set the LED:
digitalWrite(ledPin, ledState);
}
}
}
// save the reading. Next time through the loop,
// it'll be the lastButtonState: