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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 Andrew Ryabinin
*
* 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 "system.h"
#include "button.h"
#include "adc.h"
#include "backlight.h"
void button_init_device(void) {
/* setup button gpio as input */
GPIO_PCCON &= ~(POWEROFF_BUTTON);
}
int button_read_device(void) {
int adc_val = adc_read(ADC_BUTTONS);
int gpio_btn = GPIO_PCDR & BUTTON_PLAY;
if (adc_val < 270) {
if (adc_val < 110) { /* 0 - 109 */
return BUTTON_RETURN | gpio_btn;
} else { /* 110 - 269 */
return BUTTON_MENU |gpio_btn;
}
} else {
if (adc_val < 420) { /* 270 - 419 */
return BUTTON_BWD | gpio_btn;
} else if (adc_val < 580) { /* 420 - 579 */
return BUTTON_FWD | gpio_btn;
}
}
return gpio_btn;
}
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