Acrob004: Rozdiel medzi revíziami
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+ | [[Acrob003|< Previous]] | [[Acrob|Home]] | [[Acrob005|Next >]] | ||
+ | <source> | ||
+ | |||
+ | /* | ||
+ | Button | ||
+ | |||
+ | Turns on and off a light emitting diode(LED) connected to digital | ||
+ | pin 13, when pressing a pushbutton attached to pin 7. | ||
+ | |||
+ | |||
+ | The circuit: | ||
+ | * LED attached from pin 13 to ground | ||
+ | * pushbutton attached to pin 2 from +5V | ||
+ | * 10K resistor attached to pin 2 from ground | ||
+ | |||
+ | * Note: on most Arduinos there is already an LED on the board | ||
+ | attached to pin 13. | ||
+ | |||
+ | |||
+ | created 2005 | ||
+ | by DojoDave <http://www.0j0.org> | ||
+ | modified 17 Jun 2009 | ||
+ | by Tom Igoe | ||
+ | |||
+ | http://www.arduino.cc/en/Tutorial/Button | ||
+ | */ | ||
+ | |||
+ | // constants won't change. They're used here to | ||
+ | // set pin numbers: | ||
+ | const int buttonPin = 2; // the number of the pushbutton pin | ||
+ | const int ledPin = 13; // the number of the LED pin | ||
+ | |||
+ | // variables will change: | ||
+ | int buttonState = 0; // variable for reading the pushbutton status | ||
+ | |||
+ | void setup() { | ||
+ | // initialize the LED pin as an output: | ||
+ | pinMode(ledPin, OUTPUT); | ||
+ | // initialize the pushbutton pin as an input: | ||
+ | pinMode(buttonPin, INPUT); | ||
+ | } | ||
+ | |||
+ | 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) { | ||
+ | // turn LED on: | ||
+ | digitalWrite(ledPin, HIGH); | ||
+ | } | ||
+ | else { | ||
+ | // turn LED off: | ||
+ | digitalWrite(ledPin, LOW); | ||
+ | } | ||
+ | } | ||
+ | |||
+ | </source> | ||
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Verzia zo dňa a času 13:33, 12. jún 2010
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/*
Button
Turns on and off a light emitting diode(LED) connected to digital
pin 13, when pressing a pushbutton attached to pin 7.
The circuit:
* LED attached from pin 13 to ground
* pushbutton attached to pin 2 from +5V
* 10K resistor attached to pin 2 from ground
* Note: on most Arduinos there is already an LED on the board
attached to pin 13.
created 2005
by DojoDave <http://www.0j0.org>
modified 17 Jun 2009
by Tom Igoe
http://www.arduino.cc/en/Tutorial/Button
*/
// constants won't change. They're used here to
// set pin numbers:
const int buttonPin = 2; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
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) {
// turn LED on:
digitalWrite(ledPin, HIGH);
}
else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}
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