270 lines
5.9 KiB
C
270 lines
5.9 KiB
C
/*
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Copyright 2012 Jun Wako <wakojun@gmail.com>
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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, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "action_layer.h"
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// #include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "analog.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 10
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#endif
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static uint8_t debouncing = DEBOUNCE;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static matrix_row_t read_cols(void);
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static void init_cols(void);
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static void init_encoder(void);
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static void init_pot(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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int16_t analogRead(uint8_t pin);
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uint8_t state;
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int32_t position;
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int16_t value;
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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// initialize row and col
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unselect_rows();
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init_cols();
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init_encoder();
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init_pot();
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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}
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static void init_encoder(void)
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{
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DDRC &= ~(1<<6 | 1<<7);
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PORTC |= (1<<6 | 1<<7);
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uint8_t s = 0;
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_delay_ms(1);
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if (PINC&(1<<6)) s |= 1;
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if (PINC&(1<<7)) s |= 2;
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state = s;
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position = 0;
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}
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void read_encoder(void)
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{
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uint8_t s = state & 3;
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if (PINC&(1<<6)) s |= 4;
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if (PINC&(1<<7)) s |= 8;
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state = (s >> 2);
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switch (s) {
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case 1: case 7: case 8: case 14:
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position++;
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break;
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case 2: case 4: case 11: case 13:
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position--;
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break;
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case 3: case 12:
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position += 2;
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break;
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case 6: case 9:
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position -= 2;
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break;
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}
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}
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#define HEX(n) (((n) < 10) ? ((n) + '0') : ((n) + 'A' - 10))
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static void init_pot(void)
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{
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// DDRD &= ~(1<<4);
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// PORTD |= (1<<4);
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// DIDR2 = (1<<0);
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}
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uint8_t matrix_scan(void)
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{
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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select_row(i);
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_delay_us(30); // without this wait read unstable value.
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matrix_row_t cols = read_cols();
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if (matrix_debouncing[i] != cols) {
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matrix_debouncing[i] = cols;
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); debug("\n");
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}
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debouncing = DEBOUNCE;
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}
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unselect_rows();
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}
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = matrix_debouncing[i];
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}
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}
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}
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read_encoder();
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if (position >= 2) {
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register_code(KC_AUDIO_VOL_UP);
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unregister_code(KC_AUDIO_VOL_UP);
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position = 0;
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} else if (position <= -2) {
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register_code(KC_AUDIO_VOL_DOWN);
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unregister_code(KC_AUDIO_VOL_DOWN);
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position = 0;
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}
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// uint16_t val = analogRead(11);
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// debug("analogRead: "); debug_hex(val); debug("\n");
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return 1;
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}
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bool matrix_is_modified(void)
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{
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if (debouncing) return false;
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return true;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & ((matrix_row_t)1<<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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pbin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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count += bitpop16(matrix[i]);
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}
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return count;
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}
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/* Column pin configuration
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* col: 0 1 2 3 4 5 6 7 8 9 10 11
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* pin: F0 F1 F4 F5 F6 F7 B6 B5 B4 D7 D5 D4
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*/
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static void init_cols(void)
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{
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DDRF &= ~(1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
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PORTF |= (1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
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DDRD &= ~(1<<0);
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PORTD |= (1<<0);
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DDRB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3 | 1<<7);
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PORTB |= (1<<0 | 1<<1 | 1<<2 | 1<<3 | 1<<7);
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}
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static matrix_row_t read_cols(void)
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{
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return (PINB&(1<<0) ? 0 : (1<< 0)) |
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(PINB&(1<<1) ? 0 : (1<< 1)) |
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(PINB&(1<<2) ? 0 : (1<< 2)) |
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(PINB&(1<<3) ? 0 : (1<< 3)) |
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(PINB&(1<<7) ? 0 : (1<< 4)) |
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(PIND&(1<<0) ? 0 : (1<< 5)) |
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(PINF&(1<<7) ? 0 : (1<< 6)) |
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(PINF&(1<<6) ? 0 : (1<< 7)) |
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(PINF&(1<<5) ? 0 : (1<< 8)) |
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(PINF&(1<<4) ? 0 : (1<< 9)) |
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(PINF&(1<<1) ? 0 : (1<<10)) |
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(PINF&(1<<0) ? 0 : (1<<11));
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}
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/* Row pin configuration
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* row: 0 1 2 3
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* pin: B0 B1 B2 B3
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*/
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static void unselect_rows(void)
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{
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// Hi-Z(DDR:0, PORT:0) to unselect
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DDRB &= ~0b01110000;
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PORTB &= ~0b01110000;
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DDRD &= ~0b10000000;
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PORTD &= ~0b10000000;
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}
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static void select_row(uint8_t row)
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{
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switch (row) {
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case 0:
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DDRB |= (1<<6);
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PORTB &= ~(1<<6);
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break;
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case 1:
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DDRB |= (1<<5);
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PORTB &= ~(1<<5);
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break;
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case 2:
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DDRB |= (1<<4);
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PORTB &= ~(1<<4);
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break;
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case 3:
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DDRD |= (1<<7);
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PORTD &= ~(1<<7);
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break;
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}
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}
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