|
|
- /*
- Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
- Copyright 2016 Daniel Svensson <dsvensson@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/>.
- */
-
- #include <stdint.h>
- #include <stdbool.h>
- #include <avr/io.h>
- #include <util/delay.h>
- #include "wait.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "matrix.h"
-
- static uint8_t debouncing = DEBOUNCE;
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static matrix_row_t read_cols(void);
- static void select_row(uint8_t col);
-
- __attribute__ ((weak))
- void matrix_init_kb(void) {
- matrix_init_user();
- }
-
- __attribute__ ((weak))
- void matrix_scan_kb(void) {
- matrix_scan_user();
- }
-
- __attribute__ ((weak))
- void matrix_init_user(void) {
- }
-
- __attribute__ ((weak))
- void matrix_scan_user(void) {
- }
-
- inline uint8_t matrix_rows(void)
- {
- return MATRIX_ROWS;
- }
-
- inline uint8_t matrix_cols(void)
- {
- return MATRIX_COLS;
- }
-
- void matrix_init(void)
- {
- /* Column output pins */
- DDRD |= 0b01111011;
- /* Row input pins */
- DDRC &= ~0b10000000;
- DDRB &= ~0b01111111;
- PORTC |= 0b10000000;
- PORTB |= 0b01111111;
-
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
-
- matrix_init_quantum();
- }
-
- uint8_t matrix_scan(void)
- {
- for (uint8_t col = 0; col < MATRIX_COLS; col++) {
- select_row(col);
- wait_us(30);
- matrix_row_t rows = read_cols();
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
- bool curr_bit = rows & (1<<row);
- if (prev_bit != curr_bit) {
- matrix_debouncing[row] ^= (matrix_row_t) 1 << col;
- debouncing = DEBOUNCE;
- }
- }
- }
-
- if (debouncing) {
- if (--debouncing) {
- wait_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
-
- matrix_scan_quantum();
-
- 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] & 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;
- }
-
- static matrix_row_t read_cols(void)
- {
- return
- (PINB & (1 << 5) ? 0 : 1 << 0) |
- (PINC & (1 << 7) ? 0 : 1 << 1) |
- (PINB & (1 << 4) ? 0 : 1 << 2) |
- (PINB & (1 << 6) ? 0 : 1 << 3) |
- (PINB & (1 << 1) ? 0 : 1 << 4) |
- (PINB & (1 << 0) ? 0 : 1 << 5) |
- (PINB & (1 << 3) ? 0 : 1 << 6) |
- (PINB & (1 << 2) ? 0 : 1 << 7);
- }
-
- static void select_row(uint8_t col)
- {
- switch (col) {
- case 0:
- PORTD = (PORTD & ~0b01111011) | 0b00110011;
- break;
- case 1:
- PORTD = (PORTD & ~0b01111011) | 0b01110000;
- break;
- case 2:
- PORTD = (PORTD & ~0b01111011) | 0b00010011;
- break;
- case 3:
- PORTD = (PORTD & ~0b01111011) | 0b01101000;
- break;
- case 4:
- PORTD = (PORTD & ~0b01111011) | 0b00001011;
- break;
- case 5:
- PORTD = (PORTD & ~0b01111011) | 0b00111011;
- break;
- case 6:
- PORTD = (PORTD & ~0b01111011) | 0b01111000;
- break;
- case 7:
- PORTD = (PORTD & ~0b01111011) | 0b01100001;
- break;
- case 8:
- PORTD = (PORTD & ~0b01111011) | 0b01101001;
- break;
- case 9:
- PORTD = (PORTD & ~0b01111011) | 0b01110001;
- break;
- case 10:
- PORTD = (PORTD & ~0b01111011) | 0b01101010;
- break;
- case 11:
- PORTD = (PORTD & ~0b01111011) | 0b01100010;
- break;
- case 12:
- PORTD = (PORTD & ~0b01111011) | 0b01111001;
- break;
- case 13:
- PORTD = (PORTD & ~0b01111011) | 0b01100000;
- break;
- case 14:
- PORTD = (PORTD & ~0b01111011) | 0b01000011;
- break;
- case 15:
- PORTD = (PORTD & ~0b01111011) | 0b00011011;
- break;
- case 16:
- PORTD = (PORTD & ~0b01111011) | 0b00100011;
- break;
- case 17:
- PORTD = (PORTD & ~0b01111011) | 0b00101011;
- break;
- }
- }
|