244afc0a0f
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21081 a1c6a512-1295-4272-9138-f99709370657
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Dave Chapman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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#include "button.h"
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void button_init_device(void)
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{
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GPIOA_DIR |= 0xC;
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}
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int button_read_device(void)
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{
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int btn = BUTTON_NONE;
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if (!button_hold())
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{
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GPIOA |= 0x4;
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GPIOA &= ~0x8;
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int i=20; while (i--);
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if (GPIOA & 0x10) btn |= BUTTON_UP;
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if (GPIOA & 0x20) btn |= BUTTON_RIGHT;
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if (GPIOA & 0x40) btn |= BUTTON_LEFT;
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GPIOA |= 0x8;
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GPIOA &= ~0x4;
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i=20; while (i--);
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if (GPIOA & 0x10) btn |= BUTTON_VOLUP;
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if (GPIOA & 0x20) btn |= BUTTON_VOLDOWN;
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if (GPIOA & 0x40) btn |= BUTTON_DOWN;
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if (GPIOA & 0x80) btn |= BUTTON_SELECT;
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if (GPIOA & 0x100) btn |= BUTTON_POWER;
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}
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return btn;
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}
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bool button_hold(void)
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{
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return (GPIOA & 0x2);
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}
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