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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Dave Chapman
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "button.h"
void button_init_device(void)
{
GPIOA_DIR |= 0xC;
}
int button_read_device(void)
{
int btn = BUTTON_NONE;
if (!button_hold())
{
GPIOA |= 0x4;
GPIOA &= ~0x8;
int i=20; while (i--);
if (GPIOA & 0x10) btn |= BUTTON_UP;
if (GPIOA & 0x20) btn |= BUTTON_RIGHT;
if (GPIOA & 0x40) btn |= BUTTON_LEFT;
GPIOA |= 0x8;
GPIOA &= ~0x4;
i=20; while (i--);
if (GPIOA & 0x10) btn |= BUTTON_VOLUP;
if (GPIOA & 0x20) btn |= BUTTON_VOLDOWN;
if (GPIOA & 0x40) btn |= BUTTON_DOWN;
if (GPIOA & 0x80) btn |= BUTTON_SELECT;
if (GPIOA & 0x100) btn |= BUTTON_POWER;
}
return btn;
}
bool button_hold(void)
{
return (GPIOA & 0x2);
}
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