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/****************************************************************************
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 *   Copyright (C) 2011-2012 by Claas Anders "CaScAdE" Rathje               *
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 *   admiralcascade@gmail.com                                               *
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 *   Project-URL: http://www.mylifesucks.de/oss/c-epilepsy/                 *
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 *                                                                          *
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 *   This program is free software; you can redistribute it and/or modify   *
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 *   it under the terms of the GNU General Public License as published by   *
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 *   the Free Software Foundation; either version 2 of the License.         *
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 *                                                                          *
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 *   This program is distributed in the hope that it will be useful,        *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
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 *   GNU General Public License for more details.                           *
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 *                                                                          *
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 *   You should have received a copy of the GNU General Public License      *
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 *   along with this program; if not, write to the                          *
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 *   Free Software Foundation, Inc.,                                        *
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *
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 ****************************************************************************/
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#include "buttons.h"
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volatile uint8_t BUTTONS;
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void buttons_init() {
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    DDRD &= ~((1 << PD4) | (1 << PD5)); // switches are input
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    PORTD |= ((1 << PD4) | (1 << PD5)); // pullups for switches
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    // unmask pin change interrupts 28 and 29
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    PCMSK3 |= ((1 << PCINT28) | (1 << PCINT29));
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    // enable PCINT31..24
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    PCICR |= (1 << PCIE3);
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}
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ISR(PCINT3_vect) {
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    uint8_t raw = PIND; // for different buttons
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    // mode
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    if (!(raw & (1 << MODE))) {
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        BUTTONS |= (1 << MODE);
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    }
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    // set
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    if (!(raw & (1 << SET))) {
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        BUTTONS |= (1 << SET);
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    }
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}
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uint8_t mode_pressed() {
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    if (BUTTONS & (1 << MODE)) {
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        BUTTONS &= ~(1 << MODE);
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        CEPILEPSYFLAGS |= CEPI_DIRTYEEPROM;
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        return 1;
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    }
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    return 0;
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}
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uint8_t set_pressed() {
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    if (BUTTONS & (1 << SET)) {
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        BUTTONS &= ~(1 << SET);
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        CEPILEPSYFLAGS |= CEPI_DIRTYEEPROM;
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        return 1;
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    }
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    return 0;
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}