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| 1199 | - | 1 | /**************************************************************************** |
| 2 | * Copyright (C) 2011 by Claas Anders "CaScAdE" Rathje * |
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| 3 | * admiralcascade@gmail.com * |
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| 4 | * Project-URL: http://www.mylifesucks.de/oss/c-epilepsy/ * |
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| 5 | * * |
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| 6 | * This program is free software; you can redistribute it and/or modify * |
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| 7 | * it under the terms of the GNU General Public License as published by * |
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| 8 | * the Free Software Foundation; either version 2 of the License. * |
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| 9 | * * |
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| 10 | * This program is distributed in the hope that it will be useful, * |
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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| 13 | * GNU General Public License for more details. * |
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| 14 | * * |
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| 15 | * You should have received a copy of the GNU General Public License * |
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| 16 | * along with this program; if not, write to the * |
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| 17 | * Free Software Foundation, Inc., * |
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| 18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
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| 19 | ****************************************************************************/ |
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| 20 | |||
| 21 | #include "buttons.h" |
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| 22 | |||
| 23 | volatile uint8_t BUTTONS; |
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| 24 | |||
| 25 | void buttons_init() { |
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| 26 | DDRD &= ~((1 << PD4) | (1 << PD5)); // switches are input |
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| 27 | PORTD |= ((1 << PD4) | (1 << PD5)); // pullups for switches |
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| 28 | |||
| 29 | // unmask pin change interrupts 28 and 29 |
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| 30 | PCMSK3 |= ((1 << PCINT28) | (1 << PCINT29)); |
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| 31 | |||
| 32 | // enable PCINT31..24 |
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| 33 | PCICR |= (1 << PCIE3); |
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| 34 | } |
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| 35 | |||
| 36 | ISR(PCINT3_vect) { |
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| 37 | uint8_t raw = PIND; // for different buttons |
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| 38 | // mode |
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| 39 | if (!(raw & (1 << MODE))) { |
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| 40 | BUTTONS |= (1 << MODE); |
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| 41 | } |
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| 42 | // set |
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| 43 | if (!(raw & (1 << SET))) { |
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| 44 | BUTTONS |= (1 << SET); |
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| 45 | } |
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| 46 | } |
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| 47 | |||
| 48 | uint8_t mode_pressed() { |
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| 49 | if (BUTTONS & (1 << MODE)) { |
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| 50 | BUTTONS &= ~(1 << MODE); |
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| 51 | CEPILEPSYFLAGS |= CEPI_DIRTYEEPROM; |
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| 52 | return 1; |
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| 53 | } |
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| 54 | return 0; |
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| 55 | } |
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| 56 | |||
| 57 | uint8_t set_pressed() { |
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| 58 | if (BUTTONS & (1 << SET)) { |
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| 59 | BUTTONS &= ~(1 << SET); |
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| 60 | CEPILEPSYFLAGS |= CEPI_DIRTYEEPROM; |
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| 61 | return 1; |
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| 62 | } |
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| 63 | return 0; |
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| 64 | } |