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Diffstat (limited to 'dolmetsch-ctl/keypad.c')
| -rw-r--r-- | dolmetsch-ctl/keypad.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/dolmetsch-ctl/keypad.c b/dolmetsch-ctl/keypad.c deleted file mode 100644 index 1291a6e..0000000 --- a/dolmetsch-ctl/keypad.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * spreadspace avr projects - * - * - * Copyright (C) 2013-2015 Christian Pointner <equinox@spreadspace.org> - * - * This file is part of spreadspace avr projects. - * - * spreadspace avr projects 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 3 of the License, or - * any later version. - * - * spreadspace avr projects is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with spreadspace avr projects. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <avr/io.h> -#include <util/delay.h> - -#include "keypad.h" -#include "eventqueue.h" - -#define KEYPAD_LP_CNT_MAX 200 -static struct { - uint8_t last_sent; - int16_t lp_cnt; -} keypad_state[KEYPAD_NUM_KEYS]; - -static struct { - uint16_t timebase; - uint16_t cnt; -} led_blink_state[KEYPAD_NUM_KEYS]; -#define KEYPAD_BLINK_TIMEBASE_MULT 128 - -void keypad_init(void) -{ - // KEYS are at F4..F7 - DDRF &= 0x0F; - PORTF |= 0xF0; - uint8_t i; - for(i = 0; i < KEYPAD_NUM_KEYS; ++i) { - keypad_state[i].last_sent = 0; - keypad_state[i].lp_cnt = 0; - - led_blink_state[i].timebase = 0; - led_blink_state[i].cnt = 0; - } - - // LEDS are at D0..D3 - DDRD |= 0x0F; - PORTD &= 0xFC; - PORTD |= 0x0C; -} - -void keypad_led_on(uint8_t led) -{ - switch(led) { - case 0: PORTD |= 0x01; break; - case 1: PORTD |= 0x02; break; - case 2: PORTD &= 0xFB; break; - case 3: PORTD &= 0xF7; break; - case KEYPAD_MIDI_NOTE_ALL - KEYPAD_MIDI_NOTE_OFFSET: PORTD |= 0x03; PORTD &= 0xF3;; break; - } - keypad_led_blink(led, 0); -} - -void keypad_led_off(uint8_t led) -{ - switch(led) { - case 0: PORTD &= 0xFE; break; - case 1: PORTD &= 0xFD; break; - case 2: PORTD |= 0x04; break; - case 3: PORTD |= 0x08; break; - case KEYPAD_MIDI_NOTE_ALL - KEYPAD_MIDI_NOTE_OFFSET: PORTD &= 0xFC; PORTD |= 0x0C; break; - } - keypad_led_blink(led, 0); -} - -void keypad_led_toggle(uint8_t led) -{ - switch(led) { - case 0: - case 1: - case 2: - case 3: PORTD ^= (1 << led); break; - case KEYPAD_MIDI_NOTE_ALL - KEYPAD_MIDI_NOTE_OFFSET: PORTD ^= 0x0F; break; - } -} - -static uint8_t keypad_led_get_state(uint8_t led) -{ - switch(led) { - case 0: - case 1: return (PORTD & (1 << led)) ? 0 : 1; - case 2: - case 3: return (PORTD & (1 << led)) ? 1 : 0; - default: return 0; - } -} - -static void keypad_led_blink_sync(uint8_t led) -{ - uint8_t i; - for(i = 0; i < KEYPAD_NUM_KEYS; ++i) { - if(i != led && led_blink_state[i].timebase == led_blink_state[led].timebase) { - led_blink_state[led].cnt = led_blink_state[i].cnt; - if(keypad_led_get_state(led) != keypad_led_get_state(i)) - keypad_led_toggle(led); - break; - } - } -} - -void keypad_led_blink(uint8_t led, uint8_t value) -{ - if(led < KEYPAD_NUM_KEYS) { - led_blink_state[led].timebase = value * KEYPAD_BLINK_TIMEBASE_MULT; - led_blink_state[led].cnt = 0; - if(value) - keypad_led_blink_sync(led); - - } else { - uint8_t i; - for(i = 0; i < KEYPAD_NUM_KEYS; ++i) { - led_blink_state[i].timebase = value * KEYPAD_BLINK_TIMEBASE_MULT; - led_blink_state[i].cnt = 0; - } - } -} - -static inline void keypad_key_lowpass(uint8_t key_idx, uint8_t current_state) -{ - keypad_state[key_idx].lp_cnt += current_state ? -1 : +1; - if(keypad_state[key_idx].lp_cnt <= 0 || - keypad_state[key_idx].lp_cnt >= KEYPAD_LP_CNT_MAX) { - - keypad_state[key_idx].lp_cnt = keypad_state[key_idx].lp_cnt <= 0 ? 0 : KEYPAD_LP_CNT_MAX; - - if(current_state != keypad_state[key_idx].last_sent) { - keypad_state[key_idx].last_sent = current_state; - eventqueue_push(KEYPAD_MIDI_NOTE_OFFSET + key_idx, ((current_state) ? 0 : 1)); - } - } -} - -static inline void keypad_led_blinking(uint8_t key_idx) -{ - if(led_blink_state[key_idx].timebase > 1) { - if(++led_blink_state[key_idx].cnt >= led_blink_state[key_idx].timebase) { - keypad_led_toggle(key_idx); - led_blink_state[key_idx].cnt = 0; - } - } -} - -void keypad_task(void) -{ - uint8_t col, row; - for(col = 0; col < KEYPAD_NUM_COLS; ++col) { - /* KEYPAD_DDR = 1 << (col + 4); */ - /* KEYPAD_PORT = 0x0F; */ - _delay_us(20); - - for(row = 0; row < KEYPAD_NUM_ROWS; ++row) { - uint8_t key_idx = col*KEYPAD_NUM_ROWS + row; - -// uint8_t current_state = KEYPAD_PIN & (1 << row); - uint8_t current_state = PINF & (1 << (row+4)); - keypad_key_lowpass(key_idx, current_state); - - keypad_led_blinking(key_idx); - } - } -// KEYPAD_DDR = 0x00; -} |