45 lines
2.2 KiB
C++
45 lines
2.2 KiB
C++
/*----------------------------------------------------------------------*
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* Example sketch for Arduino Button Library by Jack Christensen *
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* *
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* The simplest example. Using a tactile button switch to turn *
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* the Arduino's pin 13 LED on and off. Wire a switch from Arduino *
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* pin 2 to ground. *
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* *
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* This work is licensed under the Creative Commons Attribution- *
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* ShareAlike 3.0 Unported License. To view a copy of this license, *
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* visit http://creativecommons.org/licenses/by-sa/3.0/ or send a *
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* letter to Creative Commons, 171 Second Street, Suite 300, *
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* San Francisco, California, 94105, USA. *
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*----------------------------------------------------------------------*/
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#include <Button.h> //https://github.com/JChristensen/Button
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#define BUTTON_PIN 2 //Connect a tactile button switch (or something similar)
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//from Arduino pin 2 to ground.
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#define PULLUP true //To keep things simple, we use the Arduino's internal pullup resistor.
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#define INVERT true //Since the pullup resistor will keep the pin high unless the
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//switch is closed, this is negative logic, i.e. a high state
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//means the button is NOT pressed. (Assuming a normally open switch.)
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#define DEBOUNCE_MS 20 //A debounce time of 20 milliseconds usually works well for tactile button switches.
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#define LED_PIN 13 //The standard Arduino "Pin 13" LED
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Button myBtn(BUTTON_PIN, PULLUP, INVERT, DEBOUNCE_MS); //Declare the button
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boolean ledState; //A variable that keeps the current LED status
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void setup(void)
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{
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pinMode(LED_PIN, OUTPUT); //Set the LED pin as an output
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}
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void loop(void)
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{
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myBtn.read(); //Read the button
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if (myBtn.wasReleased()) { //If the button was released, change the LED state
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ledState = !ledState;
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digitalWrite(LED_PIN, ledState);
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}
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}
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