/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ----------------------------------------------------------------------------
 */

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include "btn.h"
#include "pio.h"
#include <board.h>

//------------------------------------------------------------------------------
//         Local Variables
//------------------------------------------------------------------------------

#ifdef PINS_PUSHBUTTONS
static const Pin pinsButtons[] = {PINS_PUSHBUTTONS};
static const unsigned int numButtons = PIO_LISTSIZE(pinsButtons);
#endif

//------------------------------------------------------------------------------
//         Global Functions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// Configures the pin associated with the given button number. If the button
/// does not exist on the board, the function does nothing.
/// \param button  Number of the button to configure.
/// \return 1 if the button exists and has been configured; otherwise 0.
//------------------------------------------------------------------------------
unsigned char BTN_Configure(unsigned int button)
{
#ifdef PINS_PUSHBUTTONS
    // Check that button exists
    if (button >= numButtons) {
        return 0;
    }

    // Configure button
    return (PIO_Configure(&pinsButtons[button], 1));
#else
    return 0;
#endif
}

//------------------------------------------------------------------------------
/// Get value of given button on if it exists; otherwise does nothing.
/// \param button  Number of the button to turn on.
/// \return 1 if the button has been turned on; 0 otherwise.
//------------------------------------------------------------------------------
unsigned char BTN_Get(unsigned int button)
{
#ifdef PINS_PUSHBUTTONS
    // Check if LED exists
    if (button >= numButtons) {
        return 0;
    }

    // Get button value
    if (pinsButtons[button].type == PIO_INPUT) {

        return PIO_Get(&pinsButtons[button]);
    }
    else {

        return 0;
    }
#else
    return 0;
#endif
}

