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- /*
- 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"
- #include "debounce.h"
-
- 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);
-
- // user-defined overridable functions
-
- __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) {}
-
- // helper functions
-
- 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)
- {
- bool changed = false;
- 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 ((changed |= prev_bit != curr_bit)) {
- matrix_debouncing[row] ^= (matrix_row_t) 1 << col;
- }
- }
- }
-
- debounce(matrix_debouncing, matrix, matrix_rows(), changed);
- matrix_scan_quantum();
-
- return (uint8_t)changed;
- }
-
- 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");
- }
- }
-
- static matrix_row_t read_cols(void)
- {
- return
- (PINB&(1<<5) ? 0 : ((matrix_row_t)1<<0)) |
- (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<1)) |
- (PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) |
- (PINB&(1<<6) ? 0 : ((matrix_row_t)1<<3)) |
- (PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) |
- (PINB&(1<<2) ? 0 : ((matrix_row_t)1<<5)) |
- (PINB&(1<<3) ? 0 : ((matrix_row_t)1<<6)) |
- (PINB&(1<<0) ? 0 : ((matrix_row_t)1<<7));
- }
-
- static void select_row(uint8_t col)
- {
- switch (col) {
- case 0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break;
- case 1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break;
- case 2: PORTD = (PORTD & ~0b01111011) | 0b01100000; break;
- case 3: PORTD = (PORTD & ~0b01111011) | 0b01111001; break;
- case 4: PORTD = (PORTD & ~0b01111011) | 0b01100010; break;
- case 5: PORTD = (PORTD & ~0b01111011) | 0b01101010; break;
- case 6: PORTD = (PORTD & ~0b01111011) | 0b01110001; break;
- case 7: PORTD = (PORTD & ~0b01111011) | 0b01101001; break;
- case 8: PORTD = (PORTD & ~0b01111011) | 0b01100001; break;
- case 9: PORTD = (PORTD & ~0b01111011) | 0b01111000; break;
- case 10: PORTD = (PORTD & ~0b01111011) | 0b00100011; break;
- case 11: PORTD = (PORTD & ~0b01111011) | 0b00101011; break;
- case 12: PORTD = (PORTD & ~0b01111011) | 0b00110011; break;
- case 13: PORTD = (PORTD & ~0b01111011) | 0b01110000; break;
- case 14: PORTD = (PORTD & ~0b01111011) | 0b00010011; break;
- case 15: PORTD = (PORTD & ~0b01111011) | 0b01101000; break;
- case 16: PORTD = (PORTD & ~0b01111011) | 0b00001011; break;
- case 17: PORTD = (PORTD & ~0b01111011) | 0b00111011; break;
- }
- }
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