Test_InputDebounce.ino

/*
  Test InputDebounce Arduino Library

  Mario Ban, 05.2015
  https://github.com/Mokolea/InputDebounce


  Copyright 2017 Mario Ban

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
*/

#include "InputDebounce.h"

#define BUTTON_DEBOUNCE_DELAY   20   // [ms]

static const int pinLED = LED_BUILTIN; // 13
static const int pinSwitch = 2;

static InputDebounce buttonTest; // not enabled yet, setup has to be called later

void setup()
{
  // initialize digital pin as an output
  pinMode(pinLED, OUTPUT);
  
  // init serial
  Serial.begin(9600);
  
  Serial.println("Test InputDebounce library");
  
  // setup input button (debounced)
  buttonTest.setup(pinSwitch, BUTTON_DEBOUNCE_DELAY, InputDebounce::PIM_INT_PULL_UP_RES);
  
  // examples
  // buttonTest.setup(pinSwitch);
  // buttonTest.setup(pinSwitch, DEFAULT_INPUT_DEBOUNCE_DELAY);
  // buttonTest.setup(pinSwitch, BUTTON_DEBOUNCE_DELAY, InputDebounce::PIM_EXT_PULL_UP_RES);
}

void loop()
{
  static unsigned int buttonTest_StateOnCount = 0; // to handle new pressed state, and still pressed state
  static unsigned int buttonTest_OnTimeLast = 0; // to handle new released state, and remember last on-time (button pressed)
  
  unsigned long now = millis();
  
  // poll button state, return continuous on-time [ms] if pressed (debounced)
  unsigned int buttonTest_OnTime = buttonTest.process(now);
  
  // handle input button
  if(buttonTest_OnTime) {
    // save current on-time (button pressed), to be used when released
    buttonTest_OnTimeLast = buttonTest_OnTime;
    // check for state change
    unsigned int count = buttonTest.getStateOnCount();
    if(buttonTest_StateOnCount != count) {
      buttonTest_StateOnCount = count;
      // handle pressed state
      digitalWrite(pinLED, HIGH); // turn the LED on
      Serial.print("HIGH");
    }
    else {
      // handle still pressed state
      Serial.print("HIGH still pressed");
    }
    Serial.print(" (");
    Serial.print(buttonTest_OnTime);
    Serial.println("ms)");
  }
  else {
    if(buttonTest_OnTimeLast) {
      // handle released state
      digitalWrite(pinLED, LOW); // turn the LED off
      Serial.print("LOW (last on-time: HIGH ");
      Serial.print(buttonTest_OnTimeLast);
      Serial.println("ms)");
      buttonTest_OnTimeLast = 0; // reset, do not handle this released state again
    }
  }
  
  delay(1); // [ms]
}