56 lines
1.9 KiB
C
56 lines
1.9 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) 2011 Andrew Ryabinin
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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 "system.h"
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#include "button.h"
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#include "adc.h"
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void button_init_device(void) {
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/* setup button gpio as input */
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GPIO_PCCON &= ~(POWEROFF_BUTTON);
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}
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int button_read_device(void) {
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int adc_val = adc_read(ADC_BUTTONS);
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int gpio_btn = GPIO_PCDR & BUTTON_POWER;
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if (adc_val < 380) { /* 0 - 379 */
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if (adc_val < 250) { /* 0 - 249 */
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if (adc_val < 30) { /* 0 - 29 */
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return BUTTON_UP | gpio_btn;
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} else { /* 30 - 249 */
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return BUTTON_RIGHT | gpio_btn;
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}
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} else { /* 250 - 379 */
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return BUTTON_LEFT | gpio_btn;
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}
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} else { /* > 380 */
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if (adc_val < 460) { /* 380 - 459 */
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return BUTTON_DOWN | gpio_btn;
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} else { /* > 460 */
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if (adc_val < 560) {
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return BUTTON_SELECT | gpio_btn;
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}
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}
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}
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return gpio_btn;
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}
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