/* Copyright 2017 Gabriel Young <gabeplaysdrums@live.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 "print.h" #include "debug.h" #include "util.h" #include "matrix.h" #ifndef DEBOUNCING_DELAY # define DEBOUNCING_DELAY 5 #endif static uint8_t debouncing = DEBOUNCING_DELAY; static matrix_row_t matrix[MATRIX_ROWS]; static matrix_row_t matrix_debouncing[MATRIX_ROWS]; static matrix_row_t scan_col(void) { return ( (PINC&(1<<2) ? 0 : ((matrix_row_t)1<<0)) | \ (PINB&(1<<3) ? 0 : ((matrix_row_t)1<<1)) | \ (PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) | \ (PINB&(1<<2) ? 0 : ((matrix_row_t)1<<3)) | \ (PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) | \ (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<5)) | \ (PINB&(1<<6) ? 0 : ((matrix_row_t)1<<6)) | \ (PINB&(1<<5) ? 0 : ((matrix_row_t)1<<7)) ); } static void select_col(uint8_t col) { switch (col) { case 0: PORTD = (PORTD & ~0b01110111) | 0b01110110; break; \ case 1: PORTD = (PORTD & ~0b01110111) | 0b01100001; break; \ case 2: PORTD = (PORTD & ~0b01110111) | 0b01100101; break; \ case 3: PORTD = (PORTD & ~0b01110111) | 0b00000011; break; \ case 4: PORTD = (PORTD & ~0b01110111) | 0b00000111; break; \ case 5: PORTD = (PORTD & ~0b01110111) | 0b00010011; break; \ case 6: PORTD = (PORTD & ~0b01110111) | 0b00010111; break; \ case 7: PORTD = (PORTD & ~0b01110111) | 0b00100011; break; \ case 8: PORTD = (PORTD & ~0b01110111) | 0b00100111; break; \ case 9: PORTD = (PORTD & ~0b01110111) | 0b00110011; break; \ case 10: PORTD = (PORTD & ~0b01110111) | 0b01110010; break; \ case 11: PORTD = (PORTD & ~0b01110111) | 0b01100110; break; \ case 12: PORTD = (PORTD & ~0b01110111) | 0b01110000; break; \ case 13: PORTD = (PORTD & ~0b01110111) | 0b01100100; break; \ case 14: PORTD = (PORTD & ~0b01110111) | 0b01100000; break; \ case 15: PORTD = (PORTD & ~0b01110111) | 0b01000111; break; \ case 16: PORTD = (PORTD & ~0b01110111) | 0b01000011; break; \ case 17: PORTD = (PORTD & ~0b01110111) | 0b00110111; break; } } void matrix_init(void) { /* Column output pins */ \ DDRD |= 0b01110111; \ /* Row input pins */ \ DDRC &= ~0b10000100; \ DDRB &= ~0b01111110; \ PORTC |= 0b10000100; \ PORTB |= 0b01111110; for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = matrix_debouncing[i] = 0; matrix_init_quantum(); } uint8_t matrix_scan(void) { for (uint8_t col = 0; col < MATRIX_COLS; col++) { select_col(col); _delay_us(3); matrix_row_t col_scan = scan_col(); for (uint8_t row = 0; row < MATRIX_ROWS; row++) { bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col); bool curr_bit = col_scan & (1<<row); if (prev_bit != curr_bit) { matrix_debouncing[row] ^= ((matrix_row_t)1<<col); debouncing = DEBOUNCING_DELAY; } } } if (debouncing) { if (--debouncing) _delay_ms(1); else for (uint8_t i = 0; i < MATRIX_ROWS; i++) matrix[i] = matrix_debouncing[i]; } matrix_scan_quantum(); return 1; } inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; } void matrix_print(void) { #ifndef NO_PRINT print("\nr\\c ABCDEFGHIJKLMNOPQR\n"); for (uint8_t row = 0; row < MATRIX_ROWS; row++) { matrix_row_t matrix_row = matrix_get_row(row); xprintf("%02X: ", row); for (uint8_t col = 0; col < MATRIX_COLS; col++) { bool curr_bit = matrix_row & (1<<col); xprintf("%c", curr_bit ? '*' : '.'); } print("\n"); } #endif } uint8_t matrix_key_count(void) { uint8_t count = 0; for (uint8_t row = 0; row < MATRIX_ROWS; row++) count += bitpop32(matrix[row]); return count; }