|
|
- /*
- Copyright 2014 Kai Ryu <kai1103@gmail.com>
-
- 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 program 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 this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
- /*
- * scan matrix
- */
- #include <stdint.h>
- #include <stdbool.h>
- #include <avr/io.h>
- #include <util/delay.h>
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "matrix.h"
- #ifdef UART_RGB_ENABLE
- #include "uart_rgb.h"
- #endif
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
- static uint8_t debouncing = DEBOUNCE;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static matrix_row_t read_cols(void);
- static void init_cols(void);
- static void init_rows(void);
- static void unselect_rows(void);
- static void select_row(uint8_t row);
-
- inline
- uint8_t matrix_rows(void)
- {
- return MATRIX_ROWS;
- }
-
- inline
- uint8_t matrix_cols(void)
- {
- return MATRIX_COLS;
- }
-
- void matrix_init(void)
- {
-
- #ifdef UART_RGB_ENABLE
- uart_rgb_init();
- #endif
-
- // 85 REST
- DDRD |= _BV(PD7);
- PORTD |= _BV(PD7);
-
- // initialize row and col
- init_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
- }
-
- uint8_t matrix_scan(void)
- {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- select_row(i);
- _delay_us(30); // without this wait read unstable value.
- matrix_row_t cols = read_cols();
- if (matrix_debouncing[i] != cols) {
- matrix_debouncing[i] = cols;
- if (debouncing) {
- debug("bounce!: "); debug_hex(debouncing); debug("\n");
- }
- debouncing = DEBOUNCE;
- }
- unselect_rows();
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
-
- return 1;
- }
-
- bool matrix_is_modified(void)
- {
- if (debouncing) return false;
- return true;
- }
-
- inline
- bool matrix_is_on(uint8_t row, uint8_t col)
- {
- return (matrix[row] & ((matrix_row_t)1<<col));
- }
-
- inline
- matrix_row_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
-
- void matrix_print(void)
- {
- print("\nr/c 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- print_hex8(row); print(": ");
- print_bin_reverse16(matrix_get_row(row));
- print("\n");
- }
- }
-
- uint8_t matrix_key_count(void)
- {
- uint8_t count = 0;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- count += bitpop16(matrix[i]);
- }
- return count;
- }
-
- /* Column pin configuration
- * col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
- * pin: F7 F6 F5 F4 F1 F0 E6 D7 D6 D5 D1 D0 B7 B6 B0 C7
- * */
- static void init_cols(void)
- {
- // Input with pull-up(DDR:0, PORT:1)
- DDRF &= 0b00001100;
- PORTF |= 0b11110011;
-
- DDRD &= 0b00011100;
- PORTD |= 0b11100011;
-
- DDRB &= ~(_BV(PB6) | _BV(PB7)| _BV(PB0));
- PORTB |= (_BV(PB6) | _BV(PB7)| _BV(PB0));
-
- DDRE &= ~_BV(PE6);
- PORTE |= _BV(PE6);
-
- DDRC &= ~_BV(PC7);
- PORTC |= _BV(PC7);
-
- }
-
- static matrix_row_t read_cols(void)
- {
-
- return (PINF&_BV(PF7) ? 0 : (1<<0)) |
- (PINF&_BV(PF6) ? 0 : (1<<1)) |
- (PINF&_BV(PF5) ? 0 : (1<<2)) |
- (PINF&_BV(PF4) ? 0 : (1<<3)) |
- (PINF&_BV(PF1) ? 0 : (1<<4)) |
- (PINF&_BV(PF0) ? 0 : (1<<5)) |
- (PINE&_BV(PE6) ? 0 : (1<<6)) |
- (PIND&_BV(PD7) ? 0 : (1<<7)) |
- (PIND&_BV(PD6) ? 0 : (1<<8)) |
- (PIND&_BV(PD5) ? 0 : (1<<9)) |
- (PIND&_BV(PD1) ? 0 : (1<<10)) |
- (PIND&_BV(PD0) ? 0 : (1<<11)) |
- (PINB&_BV(PB7) ? 0 : (1<<12)) |
- (PINB&_BV(PB6) ? 0 : (1<<13)) |
- (PINB&_BV(PB0) ? 0 : (1<<14)) |
- (PINC&_BV(PC7) ? 0 : (1<<15));
- }
-
- /* Row pin configuration
- * row: 0 1 2 3 4 5 x
- * pin: B3 0 1 0 1 0 1 1
- * B2 0 0 1 1 0 0 1
- * B1 0 0 0 0 1 1 1
- */
-
- static void init_rows(void)
- {
- DDRB |= (1<<PB1 | 1<<PB2 | 1<<PB3);
- }
-
- static void unselect_rows(void)
- {
- // Hi-Z(DDR:0, PORT:0) to unselect
- PORTB |= (1<<PB1);
- PORTB |= (1<<PB2);
- PORTB |= (1<<PB3);
- }
-
- static void select_row(uint8_t row)
- {
- // Output low(DDR:1, PORT:0) to select
- (row & (1<<0)) ? (PORTB |= (1<<PB3)) : (PORTB &= ~(1<<PB3));
- (row & (1<<1)) ? (PORTB |= (1<<PB2)) : (PORTB &= ~(1<<PB2));
- (row & (1<<2)) ? (PORTB |= (1<<PB1)) : (PORTB &= ~(1<<PB1));
- }
|