/****************************************************************************
 * configs/vsn/src/buttons.c
 *
 *   Copyright (C) 2011 Uros Platise. All rights reserved.
 *
 *   Authors: Uros Platise <uros.platise@isotel.eu>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS 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.
 *
 ****************************************************************************/

/** \file
 *  \author Uros Platise
 *  \brief VSN Button
 */

#ifdef CONFIG_ARCH_BUTTONS

#include <nuttx/config.h>
#include <stdint.h>
#include <arch/board/board.h>
#include "vsn.h"

/****************************************************************************
 * Definitions
 ****************************************************************************/

/****************************************************************************
 * Private Data
 ****************************************************************************/

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/** Called from an interrupt
 * 
 * \todo Measure the time button is being pressed, and then:
 *  - if short signal all processes (tasks and threads) with 'button user request': SIGUSR1
 *  - if long (>0.5 s) signal all with 'power-off request': SIGTERM
 **/ 
void buttons_callback(void)
{
}


/****************************************************************************
 * Public Functions
 ****************************************************************************/

void up_buttoninit(void)
{
  stm32_configgpio(GPIO_PUSHBUTTON);
}


uint8_t up_buttons(void)
{
  return stm32_gpioread(GPIO_PUSHBUTTON);
}


#endif /* CONFIG_ARCH_BUTTONS */