/*******************************************************************************
 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of Maxim Integrated
 * Products, Inc. shall not be used except as stated in the Maxim Integrated
 * Products, Inc. Branding Policy.
 *
 * The mere transfer of this software does not imply any licenses
 * of trade secrets, proprietary technology, copyrights, patents,
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 *******************************************************************************
 */

#include "PushButton.h"
#include "Peripherals.h"

PushButton::PushButton(PinName pin) : interruptButton(pin) {
  this->pin = pin;

  interruptButton.mode(PullUp);
  debouncingState = false;
  // Delay for initial pullup to take effect
  wait(0.01f);
  // Attach the address of the interrupt handler routine for pushbutton
  interruptButton.fall(callback(this, &PushButton::pb_hit_interrupt_fall));
}

bool PushButton::GetButtonFallState(void) { 
 return buttonFallState; 
}

void PushButton::SetButtonFallState(bool state) { 
 buttonFallState = state; 
}

void PushButton::clearButtonFallState(void) { 
 buttonFallState = false; 
}

int PushButton::Read(void) { 
 return interruptButton.read(); 
}

void PushButton::pb_hit_interrupt_fall(void) {
    /* switch debouncing */
    if (!debouncingState)
    {
        timeout.attach(callback(this, &PushButton::pb_debounce_timeout), debounceTime);
    }   
}

void PushButton::pb_debounce_timeout(void) {
    if (!interruptButton.read())
    {
        if (Peripherals::pushButton() != NULL){
            Peripherals::pushButton()->SetButtonFallState(true);
        }
    }
    debouncingState = false;
}

