osd-contiki/platform/osd-merkur/dev/key.c
2014-04-15 07:27:26 +02:00

74 lines
2.3 KiB
C

/*
* Copyright (c) 2010 harald pichler
* 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 following disclaimer.
* * 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.
* * Neither the name of the copyright holders nor the names of
* 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
*
* \brief
* This file provides Raven KEY support.
*
* \author
* Harald Pichler harald@the-develop.net
*
*/
#include "key.h"
/*---------------------------------------------------------------------------*/
/**
* \brief This will intialize the KEY for button readings.
*/
void
key_init(void)
{
/* Enter is input w/pullup */
DDRF &= ~(1<<PINF1);
}
/*---------------------------------------------------------------------------*/
/**
* \brief This will poll run key_task() to determine if a button has been pressed.
*
* \retval True if button is pressed
* \retval False if button is not pressed
*/
uint8_t
is_button(void)
{
/* Return true if button has been pressed. */
if ( PINF & (1<<PINF1) ) {
return 0;
}
else{
return 1;
}
}