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arduino:basic_interaction

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arduino:basic_interaction [2012/09/14 00:45] – mithatarduino:basic_interaction [2012/09/14 01:06] – mithat
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 <WRAP center round important 60%> <WRAP center round important 60%>
-The following examples will need switches with pullups or internal pullups turned on with +The following examples will need switches with external pullups or internal pullups turned on via: 
  
 <code c> <code c>
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 I suspect internal pullups is the better way to go but possibly harder to explain. I suspect internal pullups is the better way to go but possibly harder to explain.
 +
 +Alternately, use external pulldowns and keep the logic uninverted.
 </WRAP> </WRAP>
  
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   // set LED state accordingly   // set LED state accordingly
-  if (buttonState == HIGH)        // if the button is pushed +  if (buttonState == LOW)        // if the button is pushed 
-    digitalWrite(ledPin, HIGH);   // turn the LED on +    digitalWrite(ledPin, HIGH);  // turn the LED on 
-  else                            // otherwise +  else                           // otherwise 
-    digitalWrite(ledPin, LOW);    // turn the LED off+    digitalWrite(ledPin, LOW);   // turn the LED off
          
   //delay(1);        // delay in between reads for stability (?)   //delay(1);        // delay in between reads for stability (?)
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 void loop() { void loop() {
   int buttonState = digitalRead(pushButtonPin);  // read the input pin   int buttonState = digitalRead(pushButtonPin);  // read the input pin
-  digitalWrite(ledPin, buttonState);          // turn the LED on or off+  digitalWrite(ledPin, !buttonState);          // turn the LED on or off
   //delay(1);        // delay in between reads for stability (?)   //delay(1);        // delay in between reads for stability (?)
 } }
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 void loop() { void loop() {
-  digitalWrite(ledPin, digitalRead(pushButtonPin));  // read the input pin and turn the LED on or off+  digitalWrite(ledPin, !digitalRead(pushButtonPin));  // read the input pin and turn the LED on or off
   //delay(1);        // delay in between reads for stability (?)   //delay(1);        // delay in between reads for stability (?)
 } }
 </file> </file>
arduino/basic_interaction.txt · Last modified: 2012/09/14 01:19 by mithat
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