| /*************************************************************************** |
| * __________ __ ___. |
| * 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" |
| #include "adc.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_PLAYPAUSE; /* 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_REPEATAB; /* down */ |
| |
| if (GPIOA & 0x80) btn |= BUTTON_SELECT; |
| if (GPIOA & 0x100) btn |= BUTTON_MENU; |
| } |
| return btn; |
| } |
| |
| bool button_hold(void) |
| { |
| return (GPIOA & 0x2); |
| } |